diff --git a/apps/edr-freight-api/.env.example b/apps/edr-freight-api/.env.example
index 26641ee70..da0b1ceb9 100644
--- a/apps/edr-freight-api/.env.example
+++ b/apps/edr-freight-api/.env.example
@@ -181,3 +181,10 @@ EIMS_UNIT_DEFAULT=PCS
 EIMS_BUYER_COUNTRY_CODE=
 EIMS_CASHIER_NAME=
 EIMS_SALESPERSON_NAME=
+# Automatic filing of issued invoices (@Cron sweep, one invoice per tick).
+# Independent of EIMS_ENABLED on purpose: authentication can be live long before
+# filing is. Both must be true before anything is submitted automatically.
+EIMS_AUTO_SUBMIT=false
+EIMS_AUTO_SUBMIT_CRON=0 */5 * * * *
+# MoR rejects documents older than 3 days; the sweep will not attempt those.
+EIMS_AUTO_SUBMIT_MAX_AGE_DAYS=3
diff --git a/apps/edr-freight-api/src/config/eims.config.ts b/apps/edr-freight-api/src/config/eims.config.ts
index 0cadb55fb..6eaaf8007 100644
--- a/apps/edr-freight-api/src/config/eims.config.ts
+++ b/apps/edr-freight-api/src/config/eims.config.ts
@@ -33,6 +33,18 @@ export interface EimsConfig {
   httpTimeoutMs: number;
   /** Re-authenticate this many ms before the access token actually expires. */
   tokenSkewMs: number;
+  /**
+   * Automatic submission of issued invoices, off by default.
+   *
+   * Invoices are produced by the workflow, so the production path is a sweep rather than a human
+   * action — but enabling it starts filing real documents with the tax authority, which is
+   * irreversible from our side. It therefore needs its own deliberate switch, separate from
+   * `EIMS_ENABLED`, so that authentication can be live long before filing is.
+   */
+  autoSubmit: boolean;
+  autoSubmitCron: string;
+  /** MoR rejects a document whose date is more than 3 days old; the sweep will not attempt those. */
+  autoSubmitMaxAgeDays: number;
   /**
    * Seller identity and tax/business treatment for the invoice document.
    *
@@ -119,6 +131,15 @@ export default registerAs("eims", (): EimsConfig => {
     certificatePath: process.env.EIMS_CERTIFICATE_PATH ?? "",
     httpTimeoutMs,
     tokenSkewMs,
+    autoSubmit: (process.env.EIMS_AUTO_SUBMIT ?? "false").toLowerCase() === "true",
+    // Every 5 minutes by default: filing is not latency-sensitive, and a slow cadence keeps a
+    // misconfiguration from filing a burst of bad documents before anyone notices.
+    autoSubmitCron: process.env.EIMS_AUTO_SUBMIT_CRON || "0 */5 * * * *",
+    autoSubmitMaxAgeDays: positiveInt(
+      process.env.EIMS_AUTO_SUBMIT_MAX_AGE_DAYS,
+      3,
+      "EIMS_AUTO_SUBMIT_MAX_AGE_DAYS",
+    ),
     invoice: {
       sellerLegalName: process.env.EIMS_SELLER_LEGAL_NAME ?? "",
       sellerVatNumber: process.env.EIMS_SELLER_VAT_NUMBER ?? "",
diff --git a/apps/edr-freight-api/src/modules/eims/eims-auto-submit.service.spec.ts b/apps/edr-freight-api/src/modules/eims/eims-auto-submit.service.spec.ts
new file mode 100644
index 000000000..6246d5a89
--- /dev/null
+++ b/apps/edr-freight-api/src/modules/eims/eims-auto-submit.service.spec.ts
@@ -0,0 +1,139 @@
+import { ConfigService } from "@nestjs/config";
+import { DataSource } from "typeorm";
+
+import { EimsConfig } from "../../config/eims.config";
+import { EimsAutoSubmitService } from "./eims-auto-submit.service";
+import { EimsInvoiceRegistrationService } from "./eims-invoice-registration.service";
+import { EimsInvoiceStatus } from "./eims-registration.types";
+import { eimsConfig } from "./eims-test-fixtures";
+
+const INVOICE_ID = "11111111-1111-4111-8111-111111111111";
+
+/**
+ * `query` is answered by shape: the first call is the system-state guard, the second is the
+ * candidate lookup. Keeps the fake honest about the order the service actually asks in.
+ */
+const build = (
+  opts: {
+    cfg?: Partial<EimsConfig>;
+    state?: { in_flight_invoice_id?: string | null; blocked_reason?: string | null };
+    candidate?: { id: string; invoiceNumber: string } | null;
+    register?: jest.Mock;
+  } = {},
+) => {
+  const register =
+    opts.register ??
+    jest.fn().mockResolvedValue({ eimsStatus: EimsInvoiceStatus.Registered, eimsIrn: "IRN-1" });
+
+  const query = jest.fn().mockImplementation((sql: string) => {
+    if (sql.includes("eims_system_state")) {
+      return Promise.resolve(
+        opts.state ? [{ in_flight_invoice_id: null, blocked_reason: null, ...opts.state }] : [],
+      );
+    }
+    return Promise.resolve(opts.candidate === undefined ? [] : opts.candidate ? [opts.candidate] : []);
+  });
+
+  const service = new EimsAutoSubmitService(
+    { query } as unknown as DataSource,
+    { get: () => eimsConfig({ autoSubmit: true, ...opts.cfg }) } as unknown as ConfigService,
+    { registerInvoiceWithEims: register } as unknown as EimsInvoiceRegistrationService,
+  );
+  return { service, register, query };
+};
+
+const candidate = { id: INVOICE_ID, invoiceNumber: "INV-20260807-00006" };
+
+describe("EimsAutoSubmitService.tick", () => {
+  it("files the oldest eligible invoice through the registration service", async () => {
+    const { service, register } = build({ candidate });
+
+    await service.tick();
+
+    expect(register).toHaveBeenCalledTimes(1);
+    expect(register).toHaveBeenCalledWith(INVOICE_ID);
+  });
+
+  it("files nothing when EIMS_AUTO_SUBMIT is off", async () => {
+    const { service, register, query } = build({ cfg: { autoSubmit: false }, candidate });
+
+    await service.tick();
+
+    expect(register).not.toHaveBeenCalled();
+    expect(query).not.toHaveBeenCalled();
+  });
+
+  it("files nothing when EIMS itself is disabled, even with auto-submit on", async () => {
+    const { service, register, query } = build({ cfg: { enabled: false }, candidate });
+
+    await service.tick();
+
+    expect(register).not.toHaveBeenCalled();
+    expect(query).not.toHaveBeenCalled();
+  });
+
+  it("does not submit while another submission is in flight", async () => {
+    const { service, register } = build({
+      state: { in_flight_invoice_id: "22222222-2222-4222-8222-222222222222" },
+      candidate,
+    });
+
+    await service.tick();
+
+    expect(register).not.toHaveBeenCalled();
+  });
+
+  it("does not submit while the system number is blocked", async () => {
+    const { service, register } = build({
+      state: { blocked_reason: "never acknowledged" },
+      candidate,
+    });
+
+    await service.tick();
+
+    expect(register).not.toHaveBeenCalled();
+  });
+
+  it("does nothing when no invoice is eligible", async () => {
+    const { service, register } = build({ candidate: null });
+
+    await service.tick();
+
+    expect(register).not.toHaveBeenCalled();
+  });
+
+  it("asks only for NOT_SUBMITTED invoices, so UNKNOWN and FAILED are never retried", async () => {
+    const { service, query } = build({ candidate });
+
+    await service.tick();
+
+    const [sql, params] = query.mock.calls.find(([s]: [string]) => s.includes("freight.invoices"))!;
+    expect(sql).toContain("i.eims_status = $1");
+    expect(params[0]).toBe(EimsInvoiceStatus.NotSubmitted);
+    expect(sql).toContain("i.issued_at IS NOT NULL");
+  });
+
+  it("survives a filing failure so the job keeps running", async () => {
+    const register = jest.fn().mockRejectedValue(new Error("EIMS register failed (406)"));
+    const { service } = build({ candidate, register });
+
+    await expect(service.tick()).resolves.toBeUndefined();
+    expect(register).toHaveBeenCalledTimes(1);
+  });
+
+  it("does not start a second tick while one is still filing", async () => {
+    let release: () => void = () => {};
+    const register = jest.fn().mockImplementation(
+      () => new Promise((resolve) => (release = () => resolve({ eimsStatus: "REGISTERED" }))),
+    );
+    const { service } = build({ candidate, register });
+
+    const first = service.tick();
+    await new Promise((r) => setImmediate(r));
+    await service.tick(); // overlapping tick, must be a no-op
+
+    expect(register).toHaveBeenCalledTimes(1);
+    release();
+    await first;
+  });
+});
diff --git a/apps/edr-freight-api/src/modules/eims/eims-auto-submit.service.ts b/apps/edr-freight-api/src/modules/eims/eims-auto-submit.service.ts
new file mode 100644
index 000000000..fb5a0d1f6
--- /dev/null
+++ b/apps/edr-freight-api/src/modules/eims/eims-auto-submit.service.ts
@@ -0,0 +1,126 @@
+import { Injectable, Logger } from "@nestjs/common";
+import { ConfigService } from "@nestjs/config";
+import { Cron } from "@nestjs/schedule";
+import { InjectDataSource } from "@nestjs/typeorm";
+import { DataSource } from "typeorm";
+
+import { EimsConfig } from "../../config/eims.config";
+import { EimsInvoiceRegistrationService } from "./eims-invoice-registration.service";
+import { EimsInvoiceStatus } from "./eims-registration.types";
+
+/**
+ * Files issued invoices with MoR EIMS on a timer.
+ *
+ * Invoices are produced by the freight workflow rather than by a person, so this — not the manual
+ * endpoint — is the production path. It is a sweep rather than a hook on the eleven places an
+ * invoice can be created or issued, which buys three things: the workflow is untouched, the HTTP
+ * call is by construction outside the invoice's transaction, and an invoice missed through a crash
+ * or a restart is picked up on the next tick.
+ *
+ * `invoices.eims_status` is the queue — nothing new is persisted. Only `NOT_SUBMITTED` is eligible:
+ * `UNKNOWN` must never be retried automatically (the document may already be filed), and `FAILED`
+ * waits for an explicit retry policy rather than a timer's guess.
+ *
+ * Off unless **both** `EIMS_ENABLED` and `EIMS_AUTO_SUBMIT` are true. Enabling it starts filing
+ * real documents with the tax authority, and a registration cannot be undone from this side.
+ */
+@Injectable()
+export class EimsAutoSubmitService {
+  private readonly logger = new Logger(EimsAutoSubmitService.name);
+  /** Guards against a tick starting while the previous one is still filing. */
+  private running = false;
+
+  constructor(
+    @InjectDataSource() private readonly dataSource: DataSource,
+    private readonly config: ConfigService,
+    private readonly registration: EimsInvoiceRegistrationService,
+  ) {}
+
+  private get cfg(): EimsConfig {
+    return this.config.get<EimsConfig>("eims")!;
+  }
+
+  /**
+   * One invoice per tick.
+   *
+   * Deliberately not a batch: each filing consumes a counter and advances the IRN chain, an
+   * ambiguous result blocks the system number until a human resolves it, and a misconfiguration
+   * should cost one rejected document rather than a burst of them.
+   */
+  @Cron(process.env.EIMS_AUTO_SUBMIT_CRON ?? "0 */5 * * * *", { name: "eims-auto-submit" })
+  async tick(): Promise<void> {
+    const cfg = this.cfg;
+    if (!cfg.enabled || !cfg.autoSubmit) return;
+    if (this.running) return;
+
+    this.running = true;
+    try {
+      // Rule of the chain: nothing may be filed while a submission is in flight or the system is
+      // blocked. The reservation would refuse anyway — checking first keeps the log quiet and
+      // avoids burning a tick on a guaranteed conflict.
+      const blocked = await this.systemBlockReason();
+      if (blocked) {
+        this.logger.warn(`EIMS auto-submit paused: ${blocked}`);
+        return;
+      }
+
+      const candidate = await this.nextCandidate();
+      if (!candidate) return;
+
+      const view = await this.registration.registerInvoiceWithEims(candidate.id);
+      this.logger.log(
+        `EIMS auto-submit: invoice ${candidate.invoiceNumber} -> ${view.eimsStatus}` +
+          (view.eimsIrn ? ` (IRN ${view.eimsIrn})` : ""),
+      );
+    } catch (err) {
+      // Never let a filing failure kill the job. The outcome is already persisted on the invoice
+      // (FAILED or UNKNOWN with the gateway's own message), and a blocked system number stops the
+      // next tick at the guard above.
+      this.logger.error(`EIMS auto-submit tick failed: ${(err as Error).message}`);
+    } finally {
+      this.running = false;
+    }
+  }
+
+  /** Why filing is currently impossible for this system number, or null when it is free. */
+  private async systemBlockReason(): Promise<string | null> {
+    const rows: { in_flight_invoice_id: string | null; blocked_reason: string | null }[] =
+      await this.dataSource.query(
+        `SELECT in_flight_invoice_id, blocked_reason
+           FROM freight.eims_system_state
+          WHERE system_number = $1 AND deleted_at IS NULL
+          LIMIT 1`,
+        [this.cfg.systemNumber],
+      );
+    const state = rows[0];
+    if (!state) return null;
+    if (state.blocked_reason) return state.blocked_reason;
+    if (state.in_flight_invoice_id) {
+      return `a submission for invoice ${state.in_flight_invoice_id} is still in flight`;
+    }
+    return null;
+  }
+
+  /**
+   * Oldest never-submitted invoice that is issued, still inside MoR's document-age window, and
+   * carries at least one line.
+   */
+  private async nextCandidate(): Promise<{ id: string; invoiceNumber: string } | null> {
+    const rows: { id: string; invoiceNumber: string }[] = await this.dataSource.query(
+      `SELECT i.id, i.invoice_number AS "invoiceNumber"
+         FROM freight.invoices i
+        WHERE i.eims_status = $1
+          AND i.issued_at IS NOT NULL
+          AND i.deleted_at IS NULL
+          AND i.issued_at > now() - ($2 || ' days')::interval
+          AND EXISTS (
+                SELECT 1 FROM freight.invoice_lines l
+                 WHERE l.invoice_id = i.id AND l.deleted_at IS NULL
+              )
+        ORDER BY i.issued_at ASC
+        LIMIT 1`,
+      [EimsInvoiceStatus.NotSubmitted, this.cfg.autoSubmitMaxAgeDays],
+    );
+    return rows[0] ?? null;
+  }
+}
diff --git a/apps/edr-freight-api/src/modules/eims/eims-test-fixtures.ts b/apps/edr-freight-api/src/modules/eims/eims-test-fixtures.ts
index f411c8b44..79fe30f96 100644
--- a/apps/edr-freight-api/src/modules/eims/eims-test-fixtures.ts
+++ b/apps/edr-freight-api/src/modules/eims/eims-test-fixtures.ts
@@ -51,6 +51,9 @@ export const eimsConfig = (over: Partial<EimsConfig> = {}): EimsConfig => ({
   certificatePath: "/dev/null",
   httpTimeoutMs: 30_000,
   tokenSkewMs: 45_000,
+  autoSubmit: false,
+  autoSubmitCron: "0 */5 * * * *",
+  autoSubmitMaxAgeDays: 3,
   invoice: eimsInvoiceConfig(),
   ...over,
 });
diff --git a/apps/edr-freight-api/src/modules/eims/eims.module.ts b/apps/edr-freight-api/src/modules/eims/eims.module.ts
index c3b50a489..678b21b52 100644
--- a/apps/edr-freight-api/src/modules/eims/eims.module.ts
+++ b/apps/edr-freight-api/src/modules/eims/eims.module.ts
@@ -4,6 +4,7 @@ import { TypeOrmModule } from "@nestjs/typeorm";
 
 import { Invoice } from "../billing/entities/invoice.entity";
 import { EimsAuthService } from "./eims-auth.service";
+import { EimsAutoSubmitService } from "./eims-auto-submit.service";
 import { EimsClientService } from "./eims-client.service";
 import { EimsCredentialsProvider } from "./eims-credentials.provider";
 import { EimsInvoiceController } from "./eims-invoice.controller";
@@ -29,6 +30,7 @@ import { EimsSystemState } from "./entities/eims-system-state.entity";
     EimsAuthService,
     EimsClientService,
     EimsInvoiceRegistrationService,
+    EimsAutoSubmitService,
   ],
   exports: [EimsAuthService, EimsClientService, EimsInvoiceRegistrationService],
 })