diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4ffa99fee..2a1e3de41 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@
 ### Fixed
 
 - The log line for a rejected proxy login now shows the source address, so you can add it to TRUSTED_PROXY_AUTH_TRUSTED_PROXIES
+- Deleting your own account now removes all of its data, like an admin delete does, instead of leaving some behind
 
 ## 26.10.5
 
diff --git a/src/backend/database/routes/user-delete-account-routes.ts b/src/backend/database/routes/user-delete-account-routes.ts
new file mode 100644
index 000000000..27fbf48ab
--- /dev/null
+++ b/src/backend/database/routes/user-delete-account-routes.ts
@@ -0,0 +1,95 @@
+import type { AuthenticatedRequest } from "../../../types/index.js";
+import type { RequestHandler, Router } from "express";
+import bcrypt from "bcryptjs";
+import { authLogger } from "../../utils/logger.js";
+import { createCurrentUserRepository } from "../repositories/factory.js";
+import { deleteUserAndRelatedData } from "./delete-user-data.js";
+
+function isNonEmptyString(val: unknown): val is string {
+  return typeof val === "string" && val.trim().length > 0;
+}
+
+export function registerUserDeleteAccountRoutes(
+  router: Router,
+  authenticateJWT: RequestHandler,
+): void {
+  /**
+   * @openapi
+   * /users/delete-account:
+   *   delete:
+   *     summary: Delete user account
+   *     description: Deletes the authenticated user's account and all of their data.
+   *     tags:
+   *       - Users
+   *     requestBody:
+   *       required: true
+   *       content:
+   *         application/json:
+   *           schema:
+   *             type: object
+   *             properties:
+   *               password:
+   *                 type: string
+   *     responses:
+   *       200:
+   *         description: Account deleted successfully.
+   *       400:
+   *         description: Password is required.
+   *       401:
+   *         description: Incorrect password.
+   *       403:
+   *         description: Cannot delete external authentication accounts or the last admin user.
+   *       404:
+   *         description: User not found.
+   *       500:
+   *         description: Failed to delete account.
+   */
+  router.delete("/delete-account", authenticateJWT, async (req, res) => {
+    const userId = (req as AuthenticatedRequest).userId;
+    const { password } = req.body ?? {};
+
+    if (!isNonEmptyString(password)) {
+      return res
+        .status(400)
+        .json({ error: "Password is required to delete account" });
+    }
+
+    try {
+      const userRepository = createCurrentUserRepository();
+      const userRecord = await userRepository.findById(userId);
+      if (!userRecord) {
+        return res.status(404).json({ error: "User not found" });
+      }
+
+      if (userRecord.isExternal) {
+        return res.status(403).json({
+          error:
+            "Cannot delete external authentication accounts through this endpoint",
+        });
+      }
+
+      const isMatch = await bcrypt.compare(password, userRecord.passwordHash);
+      if (!isMatch) {
+        authLogger.warn(
+          `Incorrect password provided for account deletion: ${userRecord.username}`,
+        );
+        return res.status(401).json({ error: "Incorrect password" });
+      }
+
+      if (userRecord.isAdmin && (await userRepository.countAdmins()) <= 1) {
+        return res
+          .status(403)
+          .json({ error: "Cannot delete the last admin user" });
+      }
+
+      // Same cleanup as an admin delete, so plugins hear user.deleted too.
+      await deleteUserAndRelatedData(userId);
+
+      authLogger.success(`User account deleted: ${userRecord.username}`);
+      res.json({ message: "Account deleted successfully" });
+    } catch (err) {
+      authLogger.error("Failed to delete user account", err);
+      res.status(500).json({ error: "Failed to delete account" });
+    }
+  });
+}
diff --git a/src/backend/database/routes/users.ts b/src/backend/database/routes/users.ts
index 598a6b40e..fbb49ccae 100644
--- a/src/backend/database/routes/users.ts
+++ b/src/backend/database/routes/users.ts
@@ -31,6 +31,7 @@ import { shownIdentity } from "../../sync/shown-identity.js";
 import { registerUserExternalAccountRoutes } from "./user-external-account-routes.js";
 import { registerUserPasswordResetRoutes } from "./user-password-reset-routes.js";
 import { registerUserAdminRoutes } from "./user-admin-routes.js";
+import { registerUserDeleteAccountRoutes } from "./user-delete-account-routes.js";
 import { registerUserDataAccessRoutes } from "./user-data-access-routes.js";
 import { listExternalLoginMethods, registerAuthRoutes } from "./auth-routes.js";
 import { registerAuthCompatRoutes } from "./auth-compat-routes.js";
@@ -1229,86 +1230,7 @@ router.patch("/password-reset-allowed", authenticateJWT, async (req, res) => {
   }
 });
 
-/**
- * @openapi
- * /users/delete-account:
- *   delete:
- *     summary: Delete user account
- *     description: Deletes the authenticated user's account.
- *     tags:
- *       - Users
- *     requestBody:
- *       required: true
- *       content:
- *         application/json:
- *           schema:
- *             type: object
- *             properties:
- *               password:
- *                 type: string
- *     responses:
- *       200:
- *         description: Account deleted successfully.
- *       400:
- *         description: Password is required.
- *       401:
- *         description: Incorrect password.
- *       403:
- *         description: Cannot delete external authentication accounts or the last admin user.
- *       404:
- *         description: User not found.
- *       500:
- *         description: Failed to delete account.
- */
-router.delete("/delete-account", authenticateJWT, async (req, res) => {
-  const userId = (req as AuthenticatedRequest).userId;
-  const { password } = req.body;
-
-  if (!isNonEmptyString(password)) {
-    return res
-      .status(400)
-      .json({ error: "Password is required to delete account" });
-  }
-
-  try {
-    const userRecord = await findCurrentUser(userId);
-    if (!userRecord) {
-      return res.status(404).json({ error: "User not found" });
-    }
-
-    if (userRecord.isExternal) {
-      return res.status(403).json({
-        error:
-          "Cannot delete external authentication accounts through this endpoint",
-      });
-    }
-
-    const isMatch = await bcrypt.compare(password, userRecord.passwordHash);
-    if (!isMatch) {
-      authLogger.warn(
-        `Incorrect password provided for account deletion: ${userRecord.username}`,
-      );
-      return res.status(401).json({ error: "Incorrect password" });
-    }
-
-    if (userRecord.isAdmin) {
-      const adminCount = await createCurrentUserRepository().countAdmins();
-      if (adminCount <= 1) {
-        return res
-          .status(403)
-          .json({ error: "Cannot delete the last admin user" });
-      }
-    }
-
-    await createCurrentUserRepository().delete(userId);
-
-    authLogger.success(`User account deleted: ${userRecord.username}`);
-    res.json({ message: "Account deleted successfully" });
-  } catch (err) {
-    authLogger.error("Failed to delete user account", err);
-    res.status(500).json({ error: "Failed to delete account" });
-  }
-});
+registerUserDeleteAccountRoutes(router, authenticateJWT);
 
 registerUserPasswordResetRoutes(router, { authManager });
 
diff --git a/src/backend/tests/database/routes/user-delete-account-routes.test.ts b/src/backend/tests/database/routes/user-delete-account-routes.test.ts
new file mode 100644
index 000000000..fbd90c1c1
--- /dev/null
+++ b/src/backend/tests/database/routes/user-delete-account-routes.test.ts
@@ -0,0 +1,160 @@
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import type { Request, RequestHandler, Response } from "express";
+
+const state = vi.hoisted(() => ({
+  users: new Map<
+    string,
+    {
+      id: string;
+      username: string;
+      isAdmin: boolean;
+      isExternal: boolean;
+      passwordHash: string;
+    }
+  >(),
+  adminCount: 1,
+  deleted: [] as string[],
+}));
+
+vi.mock("../../../database/db/index.js", () => ({ db: {} }));
+
+vi.mock("../../../utils/logger.js", () => ({
+  authLogger: {
+    error: vi.fn(),
+    warn: vi.fn(),
+    info: vi.fn(),
+    success: vi.fn(),
+  },
+}));
+
+vi.mock("bcryptjs", () => ({
+  default: {
+    compare: async (password: string, hash: string) =>
+      hash === `hash:${password}`,
+  },
+}));
+
+vi.mock("../../../database/repositories/factory.js", () => ({
+  createCurrentUserRepository: () => ({
+    findById: async (id: string) => state.users.get(id) ?? null,
+    countAdmins: async () => state.adminCount,
+  }),
+}));
+
+vi.mock("../../../database/routes/delete-user-data.js", () => ({
+  deleteUserAndRelatedData: async (userId: string) => {
+    state.deleted.push(userId);
+  },
+}));
+
+const { registerUserDeleteAccountRoutes } =
+  await import("../../../database/routes/user-delete-account-routes.js");
+
+let handler: RequestHandler | null = null;
+registerUserDeleteAccountRoutes(
+  {
+    delete: (_path: string, ...handlers: RequestHandler[]) => {
+      handler = handlers[handlers.length - 1];
+    },
+  } as unknown as import("express").Router,
+  (_req, _res, next) => next(),
+);
+
+async function deleteAccount(userId: string, body: Record<string, unknown>) {
+  const req = { userId, body } as unknown as Request;
+  const res = {
+    statusCode: 200,
+    jsonBody: null as Record<string, unknown> | null,
+    status(code: number) {
+      this.statusCode = code;
+      return this;
+    },
+    json(payload: Record<string, unknown>) {
+      this.jsonBody = payload;
+      return this;
+    },
+  };
+  await handler!(req, res as unknown as Response, () => {});
+  return res;
+}
+
+beforeEach(() => {
+  state.adminCount = 1;
+  state.deleted = [];
+  state.users = new Map([
+    [
+      "u1",
+      {
+        id: "u1",
+        username: "user",
+        isAdmin: false,
+        isExternal: false,
+        passwordHash: "hash:secret",
+      },
+    ],
+    [
+      "admin1",
+      {
+        id: "admin1",
+        username: "admin",
+        isAdmin: true,
+        isExternal: false,
+        passwordHash: "hash:secret",
+      },
+    ],
+    [
+      "sso1",
+      {
+        id: "sso1",
+        username: "sso",
+        isAdmin: false,
+        isExternal: true,
+        passwordHash: "hash:secret",
+      },
+    ],
+  ]);
+});
+
+describe("DELETE /delete-account", () => {
+  it("runs the full user cleanup", async () => {
+    const res = await deleteAccount("u1", { password: "secret" });
+    expect(res.statusCode).toBe(200);
+    expect(state.deleted).toEqual(["u1"]);
+  });
+
+  it("needs a password", async () => {
+    const res = await deleteAccount("u1", {});
+    expect(res.statusCode).toBe(400);
+    expect(state.deleted).toEqual([]);
+  });
+
+  it("refuses a wrong password", async () => {
+    const res = await deleteAccount("u1", { password: "nope" });
+    expect(res.statusCode).toBe(401);
+    expect(state.deleted).toEqual([]);
+  });
+
+  it("refuses external accounts", async () => {
+    const res = await deleteAccount("sso1", { password: "secret" });
+    expect(res.statusCode).toBe(403);
+    expect(state.deleted).toEqual([]);
+  });
+
+  it("refuses the last admin", async () => {
+    const res = await deleteAccount("admin1", { password: "secret" });
+    expect(res.statusCode).toBe(403);
+    expect(state.deleted).toEqual([]);
+  });
+
+  it("lets an admin go when another admin is left", async () => {
+    state.adminCount = 2;
+    const res = await deleteAccount("admin1", { password: "secret" });
+    expect(res.statusCode).toBe(200);
+    expect(state.deleted).toEqual(["admin1"]);
+  });
+
+  it("404s for an unknown user", async () => {
+    const res = await deleteAccount("ghost", { password: "secret" });
+    expect(res.statusCode).toBe(404);
+  });
+});