diff --git a/messages/de/imports.json b/messages/de/imports.json
index b64c649..d4bef60 100644
--- a/messages/de/imports.json
+++ b/messages/de/imports.json
@@ -170,7 +170,8 @@
       "email_invalid": "{field}: E-Mail-Adresse hat kein gültiges Format.",
       "phone_invalid": "{field}: Telefonnummer hat kein gültiges Format.",
       "end_before_start": "{field}: Ende liegt vor dem Beginn.",
-      "manual_entry": "Keine automatische Erkennung verfügbar. Bitte manuell erfassen."
+      "manual_entry": "Keine automatische Erkennung verfügbar. Bitte manuell erfassen.",
+      "ai_budget_exceeded": "Das monatliche KI-Kontingent ist aufgebraucht – deshalb keine automatische Erkennung."
     },
     "positions": {
       "name": "Bezeichnung",
diff --git a/messages/de/lotse.json b/messages/de/lotse.json
index a879388..313ff19 100644
--- a/messages/de/lotse.json
+++ b/messages/de/lotse.json
@@ -76,7 +76,8 @@
     "no_transcript": "Die Sprachnotiz hat noch keinen Text.",
     "pending": "Die Transkription läuft noch.",
     "conflict": "Inzwischen geändert. Bitte Seite neu laden.",
-    "invalid": "Bitte Eingaben prüfen."
+    "invalid": "Bitte Eingaben prüfen.",
+    "budget_exceeded": "Das monatliche KI-Kontingent des Betriebs ist aufgebraucht. Bitte den Bericht selbst schreiben oder das Büro fragen."
   },
   "settings": {
     "back": "Einstellungen",
@@ -96,6 +97,11 @@
       "du": "du"
     },
     "save": "Speichern",
+    "budget": "Monatliches KI-Kontingent (Tokens)",
+    "budgetHint": "Leer = Vorgabe der Plattform ({platform}). 0 = unbegrenzt. Ist das Kontingent aufgebraucht, bereitet der Lotse bis Monatsende nichts mehr vor.",
+    "budgetUnlimited": "unbegrenzt",
+    "budgetUsage": "Verbraucht seit {since}: {used} von {limit}",
+    "budgetExceeded": "Kontingent aufgebraucht",
     "dataTitle": "Welche Daten an wen gehen",
     "draftProvider": "Berichtsentwurf und Zusammenfassung",
     "transcriptionProvider": "Transkription von Sprachnotizen",
diff --git a/messages/en/imports.json b/messages/en/imports.json
index abf4b56..45b98f8 100644
--- a/messages/en/imports.json
+++ b/messages/en/imports.json
@@ -170,7 +170,8 @@
       "email_invalid": "{field}: e-mail address format is invalid.",
       "phone_invalid": "{field}: phone number format is invalid.",
       "end_before_start": "{field}: end is before start.",
-      "manual_entry": "Automatic recognition is not available. Please enter manually."
+      "manual_entry": "Automatic recognition is not available. Please enter manually.",
+      "ai_budget_exceeded": "The monthly AI allowance is used up – therefore no automatic recognition."
     },
     "positions": {
       "name": "Description",
diff --git a/messages/en/lotse.json b/messages/en/lotse.json
index 104753c..00b78a4 100644
--- a/messages/en/lotse.json
+++ b/messages/en/lotse.json
@@ -76,7 +76,8 @@
     "no_transcript": "The voice note has no text yet.",
     "pending": "The transcription is still running.",
     "conflict": "Changed in the meantime. Please reload the page.",
-    "invalid": "Please check your input."
+    "invalid": "Please check your input.",
+    "budget_exceeded": "This business has used up its monthly AI allowance. Please write the report yourself or ask the office."
   },
   "settings": {
     "back": "Settings",
@@ -96,6 +97,11 @@
       "du": "Informal (du)"
     },
     "save": "Save",
+    "budget": "Monthly AI allowance (tokens)",
+    "budgetHint": "Empty = platform default ({platform}). 0 = unlimited. Once used up, Lotse prepares nothing until the end of the month.",
+    "budgetUnlimited": "unlimited",
+    "budgetUsage": "Used since {since}: {used} of {limit}",
+    "budgetExceeded": "Allowance used up",
     "dataTitle": "Which data goes where",
     "draftProvider": "Report draft and summary",
     "transcriptionProvider": "Voice note transcription",
diff --git a/scripts/craftvia-worker.ts b/scripts/craftvia-worker.ts
index f4395a0..649e67e 100644
--- a/scripts/craftvia-worker.ts
+++ b/scripts/craftvia-worker.ts
@@ -1,6 +1,6 @@
 import "dotenv/config";
 import { Worker } from "bullmq";
-import { JOB_QUEUES, workerConnection, closeJobQueues, type JobPayload } from "../src/server/jobs/queues";
+import { JOB_QUEUES, workerConnection, closeJobQueues, scheduleRecurringJobs, type JobPayload } from "../src/server/jobs/queues";
 import { PROCESSORS } from "../src/server/jobs/processors";
 
 /** Craftvia background worker: `npm run worker:craftvia`. One BullMQ worker per registered queue. */
@@ -24,6 +24,11 @@ async function main() {
     workers.push(w);
     console.info(`[worker] listening on ${name}`);
   }
+  // L10b: recurring jobs (AI log retention); a scheduling failure must not stop the queue workers
+  await scheduleRecurringJobs(connection).then(
+    () => console.info("[worker] recurring jobs scheduled"),
+    (err) => console.error("[worker] scheduling recurring jobs failed:", (err as Error).message),
+  );
   const shutdown = async () => {
     await Promise.all(workers.map((w) => w.close()));
     await closeJobQueues();
diff --git a/scripts/test-betrieb-audit.ts b/scripts/test-betrieb-audit.ts
new file mode 100644
index 0000000..bc1b029
--- /dev/null
+++ b/scripts/test-betrieb-audit.ts
@@ -0,0 +1,209 @@
+// Lane L10b „Betrieb & Aufräumen" — Transaktionen, Audit und Lotse-Betrieb:
+//  h) Audit-Einträge innerhalb von inTransaction erst nach dem Commit (Rollback → keine Einträge,
+//     außer „denied"; verschachtelt; aufgeschoben)
+//  d) mergeCustomers über inTransaction (atomar, in äußere Transaktion einbettbar)
+//  e) Audit-Aktion „read" für die Notdienst-Kundensuche
+//  k) KI-Protokoll: Aufbewahrungsfrist (Pseudonymisierung) + monatliches Token-Kontingent je Mandant
+// Jeweils mit Mandantentrennung (B) und Rollen (Monteur → forbidden).
+//
+// Lauf: npx tsx scripts/test-betrieb-audit.ts (lokale Postgres-DB aus .env)
+
+import "dotenv/config";
+import { prisma, dbForTenant } from "../src/server/db";
+import { writeAuditLog } from "../src/server/audit";
+import { inTransaction } from "../src/server/services/context";
+import { mergeCustomers } from "../src/server/services/customers/merge";
+import { searchCustomersForEmergency } from "../src/server/services/emergency/lookup";
+import { aiGenerationRetentionDays, purgeExpiredAiGenerations } from "../src/server/services/lotse/retention";
+import { assertTokenBudget, getTokenBudget } from "../src/server/services/lotse/budget";
+import { getLotseSettings, updateLotseSettings } from "../src/server/services/lotse/settings";
+import { PROCESSORS } from "../src/server/jobs/processors";
+import { ctxFor, expectCode, failures, ok } from "./lib/einsatz-fixture";
+
+const SLUG_A = "zz-l10b-audit-a";
+const SLUG_B = "zz-l10b-audit-b";
+const DOMAIN = "@zz-l10b-audit.test";
+const DAY = 24 * 60 * 60 * 1000;
+
+async function cleanup() {
+  for (const slug of [SLUG_A, SLUG_B]) {
+    const tenant = await prisma.tenant.findUnique({ where: { slug }, select: { id: true } });
+    if (!tenant) continue;
+    const where = { tenantId: tenant.id };
+    await prisma.auditLog.deleteMany({ where });
+    await prisma.aiGeneration.deleteMany({ where });
+    await prisma.workOrder.deleteMany({ where });
+    await prisma.site.deleteMany({ where });
+    await prisma.contact.deleteMany({ where });
+    await prisma.customer.deleteMany({ where });
+    await prisma.tenantModule.deleteMany({ where });
+    await prisma.tenantSettings.deleteMany({ where });
+    await prisma.user.deleteMany({ where });
+    await prisma.tenant.delete({ where: { id: tenant.id } });
+  }
+  await prisma.identity.deleteMany({ where: { email: { endsWith: DOMAIN }, memberships: { none: {} } } });
+}
+
+async function user(tenantId: string, local: string) {
+  const email = `${local}${DOMAIN}`;
+  const identity = await prisma.identity.upsert({ where: { email }, update: {}, create: { email, passwordHash: "x" } });
+  return prisma.user.create({ data: { tenantId, identityId: identity.id, email, name: local } });
+}
+
+const auditCount = (tenantId: string, entity: string, entityId?: string, action?: string) =>
+  prisma.auditLog.count({ where: { tenantId, entity, ...(entityId ? { entityId } : {}), ...(action ? { action } : {}) } });
+
+async function main() {
+  await cleanup();
+  const tenantA = await prisma.tenant.create({ data: { name: "L10b Audit A", slug: SLUG_A } });
+  const tenantB = await prisma.tenant.create({ data: { name: "L10b Audit B", slug: SLUG_B } });
+  const adminA = await user(tenantA.id, "admin-a");
+  const techA = await user(tenantA.id, "tech-a");
+  const adminB = await user(tenantB.id, "admin-b");
+  const ctxAdminA = ctxFor(tenantA.id, adminA.id, "tenant-admin");
+  const ctxTechA = ctxFor(tenantA.id, techA.id, "technician");
+  const ctxAdminB = ctxFor(tenantB.id, adminB.id, "tenant-admin");
+  await prisma.tenantSettings.create({ data: { tenantId: tenantA.id, orgName: "A" } });
+  await prisma.tenantSettings.create({ data: { tenantId: tenantB.id, orgName: "B" } });
+
+  const customer = (tenantId: string, companyName: string) => prisma.customer.create({ data: { tenantId, companyName, city: "Kiel" } });
+  const site = (tenantId: string, customerId: string) =>
+    prisma.site.create({ data: { tenantId, customerId, name: "Halle", street: "Weg", houseNumber: "1", postalCode: "24103", city: "Kiel" } });
+
+  console.log("\n— h) Audit nach Commit —");
+  const probe = await customer(tenantA.id, "Probe GmbH");
+  await inTransaction(ctxAdminA, async (tx) => {
+    await tx.db.customer.update({ where: { id: probe.id }, data: { city: "Lübeck" } });
+    await writeAuditLog({ tenantId: tx.tenantId, actorId: tx.userId, action: "update", entity: "zz_l10b_tx", entityId: "commit" });
+    ok((await auditCount(tenantA.id, "zz_l10b_tx", "commit")) === 0, "innerhalb der Transaktion noch kein Audit-Eintrag (aufgeschoben)");
+  });
+  ok((await auditCount(tenantA.id, "zz_l10b_tx", "commit")) === 1, "nach Commit: Audit-Eintrag geschrieben");
+
+  await inTransaction(ctxAdminA, async (tx) => {
+    await tx.db.customer.update({ where: { id: probe.id }, data: { city: "Flensburg" } });
+    await writeAuditLog({ tenantId: tx.tenantId, actorId: tx.userId, action: "update", entity: "zz_l10b_tx", entityId: "rollback" });
+    await writeAuditLog({ tenantId: tx.tenantId, actorId: tx.userId, action: "denied", entity: "zz_l10b_tx", entityId: "rollback-denied" });
+    throw new Error("zz rollback");
+  }).catch(() => undefined);
+  ok((await prisma.customer.findUniqueOrThrow({ where: { id: probe.id } })).city === "Lübeck", "Rollback: Fachänderung verworfen");
+  ok((await auditCount(tenantA.id, "zz_l10b_tx", "rollback")) === 0, "Rollback: kein Audit-Eintrag für die verworfene Änderung");
+  ok((await auditCount(tenantA.id, "zz_l10b_tx", "rollback-denied", "denied")) === 1, "Rollback: „denied\"-Eintrag bleibt (Sicherheitsereignis)");
+
+  await inTransaction(ctxAdminA, async (outer) => {
+    await inTransaction(outer, async (inner) => {
+      await writeAuditLog({ tenantId: inner.tenantId, action: "update", entity: "zz_l10b_tx", entityId: "nested" });
+    });
+    ok((await auditCount(tenantA.id, "zz_l10b_tx", "nested")) === 0, "verschachtelt: innere Transaktion schreibt nicht vorzeitig");
+    throw new Error("zz outer rollback");
+  }).catch(() => undefined);
+  ok((await auditCount(tenantA.id, "zz_l10b_tx", "nested")) === 0, "verschachtelt: äußerer Rollback verwirft auch innere Audit-Einträge");
+  await writeAuditLog({ tenantId: tenantA.id, action: "update", entity: "zz_l10b_tx", entityId: "direct" });
+  ok((await auditCount(tenantA.id, "zz_l10b_tx", "direct")) === 1, "außerhalb einer Transaktion: sofort geschrieben");
+
+  console.log("\n— d) mergeCustomers atomar —");
+  const src = await customer(tenantA.id, "Quelle GmbH");
+  const tgt = await customer(tenantA.id, "Ziel GmbH");
+  const srcSite = await site(tenantA.id, src.id);
+  await expectCode(() => mergeCustomers(ctxTechA, { sourceId: src.id, targetId: tgt.id, confirm: true }), "forbidden", "Monteur darf nicht zusammenführen");
+  await expectCode(() => mergeCustomers(ctxAdminB, { sourceId: src.id, targetId: tgt.id, confirm: true }), "not_found", "Mandant B kann Kunden von A nicht zusammenführen");
+  await inTransaction(ctxAdminA, async (tx) => {
+    await mergeCustomers(tx, { sourceId: src.id, targetId: tgt.id, confirm: true });
+    throw new Error("zz merge rollback");
+  }).catch(() => undefined);
+  ok((await prisma.customer.findUniqueOrThrow({ where: { id: src.id } })).status !== "merged", "Merge in äußerer Transaktion + Rollback → Quelle nicht zusammengeführt");
+  ok((await prisma.site.findUniqueOrThrow({ where: { id: srcSite.id } })).customerId === src.id, "… und Objekt nicht umgehängt");
+  ok((await auditCount(tenantA.id, "customer", src.id)) === 0, "… und keine Merge-Audit-Einträge");
+  const merged = await mergeCustomers(ctxAdminA, { sourceId: src.id, targetId: tgt.id, confirm: true });
+  ok(merged.moved.sites === 1 && (await prisma.site.findUniqueOrThrow({ where: { id: srcSite.id } })).customerId === tgt.id, "Merge: Objekt umgehängt");
+  const srcAfter = await prisma.customer.findUniqueOrThrow({ where: { id: src.id } });
+  ok(srcAfter.status === "merged" && srcAfter.mergedIntoId === tgt.id, "Merge: Quelle merged + mergedIntoId");
+  ok((await auditCount(tenantA.id, "customer", src.id, "update")) === 1 && (await auditCount(tenantA.id, "customer", tgt.id, "update")) === 1, "Merge: Audit für Quelle und Ziel nach Commit");
+  await expectCode(() => mergeCustomers(ctxAdminA, { sourceId: src.id, targetId: tgt.id, confirm: true }), "conflict", "zweites Zusammenführen → conflict");
+
+  console.log("\n— e) Audit-Aktion „read\" —");
+  const hits = await searchCustomersForEmergency(ctxTechA, "Ziel");
+  ok(hits.some((h) => h.id === tgt.id), "Notdienst-Suche findet Kunden");
+  const searchAudit = await prisma.auditLog.findFirst({ where: { tenantId: tenantA.id, entity: "emergency_customer_search" }, orderBy: { createdAt: "desc" } });
+  ok(searchAudit?.action === "read" && searchAudit.actorId === techA.id, "Suchzugriff als Aktion „read\" protokolliert");
+  ok((await searchCustomersForEmergency(ctxFor(tenantB.id, adminB.id, "technician"), "Ziel")).length === 0, "Mandant B findet keine Kunden von A");
+  await expectCode(() => searchCustomersForEmergency(ctxFor(tenantA.id, adminA.id, "backoffice"), "Ziel"), "forbidden", "ohne emergency:create → forbidden");
+
+  console.log("\n— k) Aufbewahrung KI-Protokoll —");
+  const now = new Date();
+  const gen = (tenantId: string, createdAt: Date, tokens = 10, createdById: string | null = null) =>
+    prisma.aiGeneration.create({
+      data: { tenantId, kind: "report_draft", provider: "fake", model: "fake-1", input: { text: "Kunde ruft an" }, output: { workPerformed: "x" }, inputTokens: tokens, outputTokens: tokens, createdById, createdAt },
+    });
+  const oldA = await gen(tenantA.id, new Date(now.getTime() - 200 * DAY), 10, techA.id);
+  const newA = await gen(tenantA.id, new Date(now.getTime() - 10 * DAY), 10, techA.id);
+  const oldB = await gen(tenantB.id, new Date(now.getTime() - 200 * DAY), 10, adminB.id);
+  ok(aiGenerationRetentionDays() === 180, "Default-Aufbewahrung 180 Tage");
+  process.env.AI_GENERATION_RETENTION_DAYS = "30";
+  ok(aiGenerationRetentionDays() === 30, "AI_GENERATION_RETENTION_DAYS überschreibt den Default");
+  delete process.env.AI_GENERATION_RETENTION_DAYS;
+  ok(typeof PROCESSORS["ai-retention"] === "function", "Job ai-retention im Worker registriert");
+
+  const r1 = await purgeExpiredAiGenerations({ now, tenantIds: [tenantA.id] });
+  const oldAAfter = await prisma.aiGeneration.findUniqueOrThrow({ where: { id: oldA.id } });
+  ok(r1.pseudonymised === 1 && oldAAfter.input === null && oldAAfter.output === null && oldAAfter.createdById === null, "abgelaufener Eintrag: Inhalte gelöscht, Personenbezug entfernt");
+  ok(oldAAfter.inputTokens === 10 && oldAAfter.model === "fake-1" && oldAAfter.kind === "report_draft", "Metadaten (Tokens, Modell, Art) bleiben");
+  const newAAfter = await prisma.aiGeneration.findUniqueOrThrow({ where: { id: newA.id } });
+  ok(newAAfter.input !== null && newAAfter.createdById === techA.id, "junger Eintrag unverändert");
+  ok((await prisma.aiGeneration.findUniqueOrThrow({ where: { id: oldB.id } })).input !== null, "Lauf für Mandant A lässt Mandant B unberührt");
+  ok((await auditCount(tenantA.id, "ai_generation_retention", undefined, "delete")) === 1, "Aufbewahrungslauf auditiert");
+  ok((await purgeExpiredAiGenerations({ now, tenantIds: [tenantA.id] })).pseudonymised === 0, "zweiter Lauf idempotent");
+  ok((await purgeExpiredAiGenerations({ now, days: 365, tenantIds: [tenantB.id] })).pseudonymised === 0, "längere Frist → nichts gelöscht");
+  ok((await purgeExpiredAiGenerations({ now, tenantIds: [tenantB.id] })).pseudonymised === 1, "Mandant B eigener Lauf");
+
+  console.log("\n— k) Monatliches Token-Kontingent —");
+  await prisma.aiGeneration.deleteMany({ where: { tenantId: { in: [tenantA.id, tenantB.id] } } });
+  delete process.env.AI_MONTHLY_TOKEN_LIMIT;
+  await gen(tenantA.id, now, 600);
+  let budget = await getTokenBudget(ctxTechA, now);
+  ok(budget.limit === 0 && !budget.exceeded && budget.used === 1200, "ohne Limit: unbegrenzt, Verbrauch = Tokens ein+aus des Monats");
+  await expectCode(() => updateLotseSettings(ctxTechA, { enabled: true, addressForm: "neutral", monthlyTokenLimit: 1000 }), "forbidden", "Monteur darf das Kontingent nicht setzen");
+  await updateLotseSettings(ctxAdminA, { enabled: true, addressForm: "neutral", monthlyTokenLimit: 1000 });
+  budget = await getTokenBudget(ctxTechA, now);
+  ok(budget.limit === 1000 && budget.source === "tenant" && budget.exceeded, "Mandanten-Limit 1000 bei 1200 Verbrauch → aufgebraucht");
+  await expectCode(() => assertTokenBudget(ctxTechA, now), "blocked", "assertTokenBudget → blocked");
+  try {
+    await assertTokenBudget(ctxTechA, now);
+  } catch (err) {
+    ok((err as { details?: { reason?: string } }).details?.reason === "budget_exceeded", "… mit reason budget_exceeded");
+  }
+  const settingsAudit = await prisma.auditLog.findFirst({ where: { tenantId: tenantA.id, entity: "lotse_settings" }, orderBy: { createdAt: "desc" } });
+  ok((settingsAudit?.after as { monthlyTokenLimit?: number } | null)?.monthlyTokenLimit === 1000, "Limit-Änderung auditiert");
+  ok((await getLotseSettings(ctxAdminA)).budget.tenantLimit === 1000, "Einstellungsseite liefert Limit und Verbrauch");
+  ok(!(await getTokenBudget(ctxAdminB, now)).exceeded && (await getTokenBudget(ctxAdminB, now)).used === 0, "Mandant B: eigener Verbrauch, nicht betroffen");
+  ok((await prisma.tenantSettings.findFirstOrThrow({ where: { tenantId: tenantB.id } })).aiMonthlyTokenLimit === null, "Mandant B: Limit unverändert");
+
+  await gen(tenantB.id, new Date(Date.UTC(now.getUTCFullYear(), now.getUTCMonth(), 1) - DAY), 5000);
+  process.env.AI_MONTHLY_TOKEN_LIMIT = "50";
+  budget = await getTokenBudget(ctxAdminB, now);
+  ok(budget.limit === 50 && budget.source === "env" && budget.used === 0 && !budget.exceeded, "Env-Default greift; Verbrauch des Vormonats zählt nicht");
+  await gen(tenantB.id, now, 30);
+  ok((await getTokenBudget(ctxAdminB, now)).exceeded, "Env-Limit 50 bei 60 Tokens → aufgebraucht");
+  await updateLotseSettings(ctxAdminB, { enabled: true, addressForm: "neutral", monthlyTokenLimit: 0 });
+  ok(!(await getTokenBudget(ctxAdminB, now)).exceeded, "Mandanten-Limit 0 = unbegrenzt überschreibt Env");
+  await updateLotseSettings(ctxAdminB, { enabled: true, addressForm: "neutral" });
+  ok((await prisma.tenantSettings.findFirstOrThrow({ where: { tenantId: tenantB.id } })).aiMonthlyTokenLimit === 0, "Speichern ohne Limit-Feld lässt das Limit unverändert");
+  await updateLotseSettings(ctxAdminB, { enabled: true, addressForm: "neutral", monthlyTokenLimit: null });
+  ok((await getTokenBudget(ctxAdminB, now)).source === "env", "null → wieder Plattform-Vorgabe");
+  delete process.env.AI_MONTHLY_TOKEN_LIMIT;
+
+  // guard: tenant db cannot read the other tenant's usage
+  const crossUsage = await dbForTenant(tenantB.id).aiGeneration.count({ where: { tenantId: tenantA.id } }).catch(() => 0);
+  ok(crossUsage === 0, "Mandanten-Client von B sieht keine KI-Nutzung von A");
+}
+
+main()
+  .catch((err) => {
+    console.error(err);
+    ok(false, `unerwarteter Fehler: ${(err as Error).message}`);
+  })
+  .finally(async () => {
+    await cleanup().catch((e) => console.error("cleanup failed", e));
+    await prisma.$disconnect();
+    console.log(failures ? `\n✗ ${failures} Prüfung(en) fehlgeschlagen` : "\n✓ Alle Audit-/Transaktions-/Lotse-Betriebsprüfungen grün");
+    process.exit(failures ? 1 : 0);
+  });
diff --git a/src/app/(app)/settings/lotse/page.tsx b/src/app/(app)/settings/lotse/page.tsx
index 19f5d59..449a264 100644
--- a/src/app/(app)/settings/lotse/page.tsx
+++ b/src/app/(app)/settings/lotse/page.tsx
@@ -1,6 +1,6 @@
 import Link from "next/link";
 import { redirect } from "next/navigation";
-import { getTranslations } from "next-intl/server";
+import { getLocale, getTranslations } from "next-intl/server";
 import { ArrowLeft, CheckCircle2, ListChecks, MinusCircle, ShieldCheck, XCircle } from "lucide-react";
 import { LotseMark } from "@/components/lotse/lotse-mark";
 import { PageHead } from "@/components/mockup-ui";
@@ -27,8 +27,9 @@ function ProviderStatus({ ok, labels }: { ok: boolean; labels: { ok: string; off
 export default async function LotseSettingsPage({ searchParams }: { searchParams: Promise<{ saved?: string; error?: string }> }) {
   const ctx = await readCtx();
   if (!can(ctx, "tenant:manage")) redirect("/dashboard");
-  const [sp, s, t] = await Promise.all([searchParams, getLotseSettings(ctx), getTranslations("lotse")]);
+  const [sp, s, t, locale] = await Promise.all([searchParams, getLotseSettings(ctx), getTranslations("lotse"), getLocale()]);
   const statusLabels = { ok: t("settings.configured"), off: t("settings.notConfigured") };
+  const nf = new Intl.NumberFormat(locale);
 
   return (
     <main className="flex-1 p-4 md:p-6">
@@ -72,6 +73,36 @@ export default async function LotseSettingsPage({ searchParams }: { searchParams
               ))}
             </div>
           </fieldset>
+          <div>
+            <label htmlFor="monthlyTokenLimit" className="text-sm font-semibold">
+              {t("settings.budget")}
+            </label>
+            <p className="text-[12px] text-muted-foreground">
+              {t("settings.budgetHint", { platform: s.budget.platformLimit > 0 ? nf.format(s.budget.platformLimit) : t("settings.budgetUnlimited") })}
+            </p>
+            <input
+              id="monthlyTokenLimit"
+              name="monthlyTokenLimit"
+              type="number"
+              inputMode="numeric"
+              min={0}
+              step={1000}
+              defaultValue={s.budget.tenantLimit ?? ""}
+              className="mt-2 h-11 w-full max-w-60 rounded-lg border border-input bg-background px-3 text-sm"
+            />
+            <p className="mt-2 flex flex-wrap items-center gap-2 text-[12.5px] text-muted-foreground">
+              {t("settings.budgetUsage", {
+                since: new Date(s.budget.periodStart).toLocaleDateString(locale, { timeZone: "UTC" }),
+                used: nf.format(s.budget.used),
+                limit: s.budget.limit > 0 ? nf.format(s.budget.limit) : t("settings.budgetUnlimited"),
+              })}
+              {s.budget.exceeded && (
+                <span className="inline-flex items-center gap-1 font-semibold text-[var(--risk)]">
+                  <XCircle className="size-4" aria-hidden /> {t("settings.budgetExceeded")}
+                </span>
+              )}
+            </p>
+          </div>
           <Button type="submit" className="min-h-11">
             {t("settings.save")}
           </Button>
diff --git a/src/lib/imports/extraction.ts b/src/lib/imports/extraction.ts
index bc0f58e..ca69d19 100644
--- a/src/lib/imports/extraction.ts
+++ b/src/lib/imports/extraction.ts
@@ -199,7 +199,9 @@ export type PlausibilityHintCode =
   | "email_invalid"
   | "phone_invalid"
   | "end_before_start"
-  | "manual_entry";
+  | "manual_entry"
+  /** L10b: monthly AI token budget of the tenant used up → manual entry */
+  | "ai_budget_exceeded";
 
 export type PlausibilityHint = { field: ExtractionFieldKey | null; code: PlausibilityHintCode };
 
diff --git a/src/lib/lotse/action-state.ts b/src/lib/lotse/action-state.ts
index f619283..081b109 100644
--- a/src/lib/lotse/action-state.ts
+++ b/src/lib/lotse/action-state.ts
@@ -12,6 +12,7 @@ export const LOTSE_ERROR_CODES = [
   "pending",
   "conflict",
   "invalid",
+  "budget_exceeded",
 ] as const;
 export type LotseActionErrorCode = (typeof LOTSE_ERROR_CODES)[number];
 
diff --git a/src/server/actions/lotse-settings.ts b/src/server/actions/lotse-settings.ts
index 98bb19f..896f8e1 100644
--- a/src/server/actions/lotse-settings.ts
+++ b/src/server/actions/lotse-settings.ts
@@ -19,9 +19,12 @@ export async function saveLotseSettings(fd: FormData): Promise<void> {
   try {
     requirePermission(session, "tenant:manage"); // fast JWT check; requireApiContext re-checks against the DB
     const ctx = await requireApiContext(null, "tenant:manage");
+    // L10b: empty = platform default (null); invalid numbers are rejected by the service schema
+    const rawLimit = String(fd.get("monthlyTokenLimit") ?? "").trim();
     await updateLotseSettings(ctx, {
       enabled: fd.get("enabled") === "on",
       addressForm: (["sie", "du"].includes(String(fd.get("addressForm"))) ? String(fd.get("addressForm")) : "neutral") as "sie" | "du" | "neutral",
+      monthlyTokenLimit: rawLimit === "" ? null : Number(rawLimit),
     });
     revalidatePath("/settings/lotse");
     revalidatePath("/", "layout");
diff --git a/src/server/jobs/processors/ai-retention.ts b/src/server/jobs/processors/ai-retention.ts
new file mode 100644
index 0000000..8be5632
--- /dev/null
+++ b/src/server/jobs/processors/ai-retention.ts
@@ -0,0 +1,11 @@
+import { purgeExpiredAiGenerations } from "@/server/services/lotse/retention";
+
+/**
+ * Daily retention job for the AI log (L10b, Spec §31). Scheduled by the craftvia worker
+ * (`scheduleRecurringJobs`); the payload carries no tenant — the service iterates all tenants and
+ * writes through dbForTenant.
+ */
+export async function process(): Promise<void> {
+  const res = await purgeExpiredAiGenerations();
+  console.info(`[ai-retention] ${res.pseudonymised} entries older than ${res.days} days pseudonymised (${res.tenants} tenants)`);
+}
diff --git a/src/server/jobs/processors/index.ts b/src/server/jobs/processors/index.ts
index 4ac9ea9..bc7653b 100644
--- a/src/server/jobs/processors/index.ts
+++ b/src/server/jobs/processors/index.ts
@@ -12,6 +12,7 @@ export const PROCESSORS: Partial<Record<JobQueueName, () => Promise<JobProcessor
   transcription: () => import("./transcription").then((m) => m.process),
   "report-pdf": () => import(/* turbopackIgnore: true */ "./report-pdf").then((m) => m.process), // worker-only (react-dom/server + Chromium), kept out of the app bundle
   "image-derivatives": () => import("./image-derivatives").then((m) => m.process),
+  "ai-retention": () => import("./ai-retention").then((m) => m.process), // L10b: daily AI log retention (scheduled by the worker)
 };
 
 /** Inline fallback when no Redis is available (dev/demo). */
diff --git a/src/server/jobs/queues.ts b/src/server/jobs/queues.ts
index 315d0b2..f310555 100644
--- a/src/server/jobs/queues.ts
+++ b/src/server/jobs/queues.ts
@@ -12,6 +12,7 @@ export const JOB_QUEUES = {
   transcription: "transcription",
   reportPdf: "report-pdf",
   imageDerivatives: "image-derivatives",
+  aiRetention: "ai-retention",
 } as const;
 
 export type JobQueueName = (typeof JOB_QUEUES)[keyof typeof JOB_QUEUES];
@@ -80,6 +81,24 @@ export async function enqueueJob(name: JobQueueName, payload: JobPayload): Promi
   return true;
 }
 
+/**
+ * Recurring jobs (L10b), registered once by the craftvia worker at start. BullMQ job schedulers
+ * are idempotent per id, so several worker replicas do not create duplicates.
+ * - ai-retention: daily pseudonymisation of AI log contents (services/lotse/retention.ts)
+ */
+export async function scheduleRecurringJobs(connection: Redis): Promise<void> {
+  const q = new Queue<JobPayload>(JOB_QUEUES.aiRetention, { connection });
+  try {
+    await q.upsertJobScheduler(
+      "ai-retention-daily",
+      { every: 24 * 60 * 60 * 1000 },
+      { name: JOB_QUEUES.aiRetention, data: { tenantId: "*", entityId: "retention" }, opts: { removeOnComplete: { count: 30 }, removeOnFail: { count: 30 } } },
+    );
+  } finally {
+    await q.close();
+  }
+}
+
 export async function closeJobQueues(): Promise<void> {
   await Promise.all([...queues.values()].map((q) => q.close()));
   queues.clear();
diff --git a/src/server/services/imports/process.ts b/src/server/services/imports/process.ts
index 0a17f59..bee48f0 100644
--- a/src/server/services/imports/process.ts
+++ b/src/server/services/imports/process.ts
@@ -13,6 +13,7 @@ import { checkPlausibility } from "@/lib/imports/plausibility";
 // TODO(L3→L1): replace with "@/lib/customers/duplicates" after the L1 merge (same interface).
 import { findDuplicateCustomers } from "@/server/services/customers/duplicates";
 import { findSiteCandidates } from "./site-candidates";
+import { getTokenBudget } from "@/server/services/lotse/budget";
 
 export type ProcessDeps = {
   provider: DocumentExtractionProvider | null;
@@ -45,9 +46,11 @@ export async function processImport(ctx: ServiceCtx, importId: string, deps: Pro
     let providerName: string | null = null;
     let model: string | null = null;
 
-    if (!deps.provider) {
+    // L10b: monthly AI token budget used up → same graceful path as without provider
+    const budgetExceeded = deps.provider ? (await getTokenBudget(ctx, deps.now)).exceeded : false;
+    if (!deps.provider || budgetExceeded) {
       fields = emptyExtraction();
-      hints = [{ field: null, code: "manual_entry" }];
+      hints = budgetExceeded ? [{ field: null, code: "manual_entry" }, { field: null, code: "ai_budget_exceeded" }] : [{ field: null, code: "manual_entry" }];
     } else {
       const bytes = await deps.loadBytes({ storageKey: doc.storageKey });
       if (!bytes) throw new Error("file_unavailable");
diff --git a/src/server/services/lotse/budget.ts b/src/server/services/lotse/budget.ts
new file mode 100644
index 0000000..d2f1d79
--- /dev/null
+++ b/src/server/services/lotse/budget.ts
@@ -0,0 +1,57 @@
+import { ServiceError, type ServiceCtx } from "@/server/services/context";
+
+/**
+ * Monthly AI token budget per tenant (Spec §31 „Kostenlimit", L10b).
+ * Limit = `TenantSettings.aiMonthlyTokenLimit` if set, otherwise env `AI_MONTHLY_TOKEN_LIMIT`
+ * (default 0). 0 = unlimited. Usage = sum of input + output tokens of all `AiGeneration`s of the
+ * tenant since the start of the current calendar month (UTC). Checked BEFORE a provider call —
+ * one call may overshoot the limit by its own size, the next one is refused.
+ * Transcription (audio) reports no tokens and is not counted.
+ */
+
+export function envMonthlyTokenLimit(): number {
+  const v = Number(process.env.AI_MONTHLY_TOKEN_LIMIT);
+  return Number.isInteger(v) && v >= 0 ? v : 0;
+}
+
+export type TokenBudget = {
+  /** effective limit, 0 = unlimited */
+  limit: number;
+  source: "tenant" | "env";
+  /** tenant override as stored (null = platform default) */
+  tenantLimit: number | null;
+  used: number;
+  periodStart: string;
+  exceeded: boolean;
+};
+
+export function monthStart(now: Date): Date {
+  return new Date(Date.UTC(now.getUTCFullYear(), now.getUTCMonth(), 1));
+}
+
+export async function getTokenBudget(ctx: Pick<ServiceCtx, "db">, now: Date = new Date()): Promise<TokenBudget> {
+  const start = monthStart(now);
+  const [settings, usage] = await Promise.all([
+    ctx.db.tenantSettings.findFirst({ select: { aiMonthlyTokenLimit: true } }),
+    ctx.db.aiGeneration.aggregate({ where: { createdAt: { gte: start } }, _sum: { inputTokens: true, outputTokens: true } }),
+  ]);
+  const tenantLimit = settings?.aiMonthlyTokenLimit ?? null;
+  const limit = tenantLimit ?? envMonthlyTokenLimit();
+  const used = (usage._sum.inputTokens ?? 0) + (usage._sum.outputTokens ?? 0);
+  return {
+    limit,
+    source: tenantLimit === null ? "env" : "tenant",
+    tenantLimit,
+    used,
+    periodStart: start.toISOString(),
+    exceeded: limit > 0 && used >= limit,
+  };
+}
+
+/** Throws `blocked` (details.reason = "budget_exceeded") when the monthly budget is used up. */
+export async function assertTokenBudget(ctx: Pick<ServiceCtx, "db">, now: Date = new Date()): Promise<void> {
+  const budget = await getTokenBudget(ctx, now);
+  if (budget.exceeded) {
+    throw new ServiceError("blocked", "monthly AI token budget exceeded", { reason: "budget_exceeded", limit: budget.limit, used: budget.used });
+  }
+}
diff --git a/src/server/services/lotse/draft-report.ts b/src/server/services/lotse/draft-report.ts
index 7c17042..3671850 100644
--- a/src/server/services/lotse/draft-report.ts
+++ b/src/server/services/lotse/draft-report.ts
@@ -10,6 +10,7 @@ import { contentOf, requireVisibleReport } from "@/server/services/reports/commo
 import { buildReportDraftInput } from "./minimize";
 import { assertLotseEnabled, lotseVoice } from "./settings";
 import { loadDraftNotes, loadMinimizationContext } from "./sources";
+import { assertTokenBudget } from "./budget";
 
 export type LotseDeps = { provider: LotseAssistant | null; now?: () => Date };
 export const defaultLotseDeps = (): LotseDeps => ({ provider: getLotseProvider() });
@@ -45,6 +46,7 @@ export async function prepareDraftInput(ctx: ServiceCtx, report: Report, content
 export async function draftReportWithLotse(ctx: ServiceCtx, reportId: string, deps: LotseDeps = defaultLotseDeps()) {
   const report = await requireDraftableReport(ctx, reportId);
   if (!deps.provider) throw new ServiceError("invalid", "lotse provider not configured", { reason: "not_configured" });
+  await assertTokenBudget(ctx); // L10b: monthly token budget (blocked, reason budget_exceeded)
   const content = contentOf(report);
   const input = await prepareDraftInput(ctx, report, content);
 
diff --git a/src/server/services/lotse/retention.ts b/src/server/services/lotse/retention.ts
new file mode 100644
index 0000000..80fc599
--- /dev/null
+++ b/src/server/services/lotse/retention.ts
@@ -0,0 +1,50 @@
+import { Prisma } from "@prisma/client";
+import { writeAuditLog } from "@/server/audit";
+import { dbForTenant, prisma } from "@/server/db";
+
+/**
+ * Retention of the AI log (Spec §31 „Aufbewahrung", L9 offener Punkt 4, L10b):
+ * after `AI_GENERATION_RETENTION_DAYS` (default 180) the CONTENT of an AiGeneration (minimised
+ * input sent to the provider, provider output) is deleted and the person reference is removed
+ * (`createdById = null`). Metadata (kind, provider, model, tokens, entity reference, time) stays
+ * for cost statistics and the reference from reports (`aiGenerationId`) keeps resolving.
+ * Runs daily in the craftvia worker (queue `ai-retention`); idempotent.
+ */
+
+export const DEFAULT_AI_GENERATION_RETENTION_DAYS = 180;
+
+export function aiGenerationRetentionDays(): number {
+  const v = Number(process.env.AI_GENERATION_RETENTION_DAYS);
+  return Number.isInteger(v) && v > 0 ? v : DEFAULT_AI_GENERATION_RETENTION_DAYS;
+}
+
+export type RetentionResult = { cutoff: string; days: number; tenants: number; pseudonymised: number };
+
+export async function purgeExpiredAiGenerations(opts: { now?: Date; days?: number; tenantIds?: string[] } = {}): Promise<RetentionResult> {
+  const days = opts.days ?? aiGenerationRetentionDays();
+  const cutoff = new Date((opts.now ?? new Date()).getTime() - days * 24 * 60 * 60 * 1000);
+  // tenant list = platform data (no tenant content); every content change runs through dbForTenant
+  const tenantIds = opts.tenantIds ?? (await prisma.tenant.findMany({ select: { id: true } })).map((t) => t.id);
+
+  let pseudonymised = 0;
+  for (const tenantId of tenantIds) {
+    const db = dbForTenant(tenantId);
+    const res = await db.aiGeneration.updateMany({
+      where: {
+        createdAt: { lt: cutoff },
+        OR: [{ input: { not: Prisma.DbNull } }, { output: { not: Prisma.DbNull } }, { createdById: { not: null } }],
+      },
+      data: { input: Prisma.DbNull, output: Prisma.DbNull, createdById: null },
+    });
+    if (res.count > 0) {
+      pseudonymised += res.count;
+      await writeAuditLog({
+        tenantId,
+        action: "delete",
+        entity: "ai_generation_retention",
+        after: { count: res.count, cutoff: cutoff.toISOString(), retentionDays: days },
+      });
+    }
+  }
+  return { cutoff: cutoff.toISOString(), days, tenants: tenantIds.length, pseudonymised };
+}
diff --git a/src/server/services/lotse/settings.ts b/src/server/services/lotse/settings.ts
index 3526e9c..8320ecd 100644
--- a/src/server/services/lotse/settings.ts
+++ b/src/server/services/lotse/settings.ts
@@ -5,6 +5,7 @@ import { AI_MODEL, isAiConfigured } from "@/server/ai/client";
 import { transcriptionConfig } from "@/server/ai/transcription/openai-compatible";
 import { writeAuditLog } from "@/server/audit";
 import { assertCan, inTransaction, ServiceError, type ServiceCtx } from "@/server/services/context";
+import { envMonthlyTokenLimit, getTokenBudget } from "./budget";
 
 /**
  * Lotse settings per tenant (lane L9): on/off = module toggle `lotse` (TenantModule, missing row = on),
@@ -38,19 +39,26 @@ export async function lotseVoice(ctx: Pick<ServiceCtx, "db">): Promise<{ address
 
 export async function getLotseSettings(ctx: ServiceCtx) {
   assertCan(ctx, "tenant:manage");
-  const [enabled, s] = await Promise.all([isLotseEnabled(ctx), ctx.db.tenantSettings.findFirst({ select: { lotseAddressForm: true } })]);
+  const [enabled, s, budget] = await Promise.all([
+    isLotseEnabled(ctx),
+    ctx.db.tenantSettings.findFirst({ select: { lotseAddressForm: true } }),
+    getTokenBudget(ctx),
+  ]);
   const transcription = transcriptionConfig();
   return {
     enabled,
     addressForm: toAddressForm(s?.lotseAddressForm),
     draft: { configured: isAiConfigured(), provider: "Anthropic (Claude)", model: AI_MODEL },
     transcription,
+    budget: { ...budget, platformLimit: envMonthlyTokenLimit() },
   };
 }
 
 export const lotseSettingsSchema = z.object({
   enabled: z.boolean(),
   addressForm: z.enum(["sie", "du", "neutral"]),
+  /** L10b: tenant token budget per month; null = platform default, 0 = unlimited, undefined = unchanged */
+  monthlyTokenLimit: z.number().int().min(0).max(1_000_000_000).nullable().optional(),
 });
 export type LotseSettingsInput = z.input<typeof lotseSettingsSchema>;
 
@@ -59,10 +67,13 @@ export async function updateLotseSettings(ctx: ServiceCtx, raw: LotseSettingsInp
   const input = lotseSettingsSchema.parse(raw);
   const addressForm = input.addressForm === "neutral" ? null : input.addressForm;
 
+  const stored = await ctx.db.tenantSettings.findFirst({ select: { lotseAddressForm: true, aiMonthlyTokenLimit: true } });
   const before = {
     enabled: await isLotseEnabled(ctx),
-    addressForm: (await ctx.db.tenantSettings.findFirst({ select: { lotseAddressForm: true } }))?.lotseAddressForm ?? null,
+    addressForm: stored?.lotseAddressForm ?? null,
+    monthlyTokenLimit: stored?.aiMonthlyTokenLimit ?? null,
   };
+  const monthlyTokenLimit = input.monthlyTokenLimit === undefined ? before.monthlyTokenLimit : input.monthlyTokenLimit;
   await inTransaction(ctx, async (tx) => {
     await tx.db.tenantModule.upsert({
       where: { tenantId_moduleKey: { tenantId: tx.tenantId, moduleKey: LOTSE_MODULE_KEY } },
@@ -70,14 +81,15 @@ export async function updateLotseSettings(ctx: ServiceCtx, raw: LotseSettingsInp
       create: { tenantId: tx.tenantId, moduleKey: LOTSE_MODULE_KEY, enabled: input.enabled },
     });
     const existing = await tx.db.tenantSettings.findFirst({ select: { id: true } });
+    const data = { lotseAddressForm: addressForm, aiMonthlyTokenLimit: monthlyTokenLimit };
     if (existing) {
-      await tx.db.tenantSettings.update({ where: { id: existing.id }, data: { lotseAddressForm: addressForm } });
+      await tx.db.tenantSettings.update({ where: { id: existing.id }, data });
     } else {
       const tenant = await tx.db.tenant.findUnique({ where: { id: tx.tenantId }, select: { name: true } });
-      await tx.db.tenantSettings.create({ data: { tenantId: tx.tenantId, orgName: tenant?.name ?? "—", lotseAddressForm: addressForm } });
+      await tx.db.tenantSettings.create({ data: { tenantId: tx.tenantId, orgName: tenant?.name ?? "—", ...data } });
     }
   });
-  const after = { enabled: input.enabled, addressForm };
+  const after = { enabled: input.enabled, addressForm, monthlyTokenLimit };
   await writeAuditLog({ tenantId: ctx.tenantId, actorId: ctx.userId, action: "update", entity: "lotse_settings", entityId: ctx.tenantId, before, after });
   return after;
 }
diff --git a/src/server/services/lotse/voice.ts b/src/server/services/lotse/voice.ts
index b66cd48..a39577b 100644
--- a/src/server/services/lotse/voice.ts
+++ b/src/server/services/lotse/voice.ts
@@ -7,6 +7,7 @@ import { createNote } from "@/server/services/field/notes";
 import { workOrderScope } from "@/server/services/work-orders/visibility";
 import { defaultLotseDeps, type LotseDeps } from "./draft-report";
 import { scrubText } from "./minimize";
+import { assertTokenBudget } from "./budget";
 import { assertLotseEnabled, lotseVoice } from "./settings";
 import { loadMinimizationContext } from "./sources";
 import { TRANSCRIPT_SEPARATOR } from "./transcription";
@@ -67,6 +68,7 @@ export async function summarizeVoiceNote(ctx: ServiceCtx, voiceNoteId: string, d
   await assertLotseEnabled(ctx);
   if (!voice.transcript?.trim()) throw new ServiceError("invalid", "voice note has no transcript", { reason: "no_transcript" });
   if (!deps.provider) throw new ServiceError("invalid", "lotse provider not configured", { reason: "not_configured" });
+  await assertTokenBudget(ctx); // L10b: monthly token budget
 
   const [minimization, lang] = await Promise.all([loadMinimizationContext(ctx, voice.workOrderId), lotseVoice(ctx)]);
   const transcript = scrubText(voice.transcript, minimization);