diff --git a/client/src/data-provider/mutations.ts b/client/src/data-provider/mutations.ts
index 93cd955139..cfebd10d17 100644
--- a/client/src/data-provider/mutations.ts
+++ b/client/src/data-provider/mutations.ts
@@ -572,6 +572,7 @@ export const useDeleteConversationMutation = (
         });
         queryClient.invalidateQueries([QueryKeys.projectConversations]);
         queryClient.invalidateQueries([QueryKeys.projects]);
+        queryClient.invalidateQueries([QueryKeys.conversationTags]);
         if (deletedProjectId) {
           queryClient.invalidateQueries([QueryKeys.project, deletedProjectId]);
         }
diff --git a/e2e/specs/mock/bookmarks.spec.ts b/e2e/specs/mock/bookmarks.spec.ts
new file mode 100644
index 0000000000..6b05c61fc8
--- /dev/null
+++ b/e2e/specs/mock/bookmarks.spec.ts
@@ -0,0 +1,145 @@
+import { expect, test } from '@playwright/test';
+import type { Locator, Page } from '@playwright/test';
+import {
+  selectMockEndpoint,
+  getAccessToken,
+  MOCK_ENDPOINTS,
+  NEW_CHAT_PATH,
+  sendMessage,
+  fetchJson,
+} from './helpers';
+
+type TagCount = { tag: string; count: number };
+
+const uniqueName = (prefix: string) =>
+  `${prefix}-${Date.now().toString(36)}-${Math.floor(Math.random() * 1e4)}`;
+
+const firstConversation = (page: Page) => page.getByTestId('convo-item').first();
+
+/** The header bookmark menu (the nav filter button shares the `bookmark-menu` testid). */
+const headerBookmarkButton = (page: Page) => page.locator('#bookmark-menu-button');
+
+/** Start a mock chat and send a message so the conversation persists at `/c/:id`. */
+async function startBookmarkableChat(page: Page): Promise<void> {
+  await page.goto(NEW_CHAT_PATH, { timeout: 10000 });
+  await selectMockEndpoint(page, MOCK_ENDPOINTS[0]);
+  const response = await sendMessage(page, 'hello bookmarks');
+  expect(response.ok()).toBeTruthy();
+  await expect(page).toHaveURL(/\/c\/(?!new)/, { timeout: 15000 });
+  await expect(headerBookmarkButton(page)).toBeVisible({ timeout: 15000 });
+}
+
+/** Create a brand-new bookmark and attach it to the active conversation (count -> 1). */
+async function createBookmarkForActiveChat(page: Page, tag: string): Promise<void> {
+  await headerBookmarkButton(page).click();
+  await page.getByRole('menuitem', { name: 'New Bookmark' }).click();
+
+  const dialog = page.getByRole('dialog');
+  await dialog.getByRole('textbox', { name: 'Title' }).fill(tag);
+  const [response] = await Promise.all([
+    page.waitForResponse(
+      (r) => r.request().method() === 'POST' && new URL(r.url()).pathname === '/api/tags',
+      { timeout: 15000 },
+    ),
+    dialog.getByRole('button', { name: 'Save' }).click(),
+  ]);
+  expect(response.ok()).toBeTruthy();
+  await expect(dialog).toBeHidden();
+  await page.keyboard.press('Escape');
+}
+
+/** Attach an already-existing bookmark to the active conversation (count += 1). */
+async function addExistingBookmarkToActiveChat(page: Page, tag: string): Promise<void> {
+  await headerBookmarkButton(page).click();
+  // Existing-tag rows render as `menuitemcheckbox` (they carry aria-checked).
+  const tagItem = page.getByRole('menuitemcheckbox', { name: tag, exact: true });
+  await expect(tagItem).toBeVisible({ timeout: 10000 });
+  const [response] = await Promise.all([
+    page.waitForResponse(
+      (r) =>
+        r.request().method() === 'PUT' && new URL(r.url()).pathname.startsWith('/api/tags/convo/'),
+      { timeout: 15000 },
+    ),
+    tagItem.click(),
+  ]);
+  expect(response.ok()).toBeTruthy();
+  await page.keyboard.press('Escape');
+}
+
+/** Read the persisted bookmark count from the server (0 when the tag is absent). */
+async function getTagCount(page: Page, tag: string): Promise<number> {
+  const token = await getAccessToken(page);
+  const tags = await fetchJson<TagCount[]>(page, '/api/tags', token);
+  return tags.find((t) => t.tag === tag)?.count ?? 0;
+}
+
+async function renameConversation(page: Page, conversation: Locator, title: string): Promise<void> {
+  await conversation.hover();
+  await conversation.getByRole('button', { name: 'Conversation Menu Options' }).click();
+  await page.getByRole('menuitem', { name: 'Rename' }).click();
+  const titleInput = conversation.getByRole('textbox', { name: 'New Conversation Title' });
+  await expect(titleInput).toBeVisible();
+  await titleInput.fill(title);
+  await conversation.getByRole('button', { name: 'Save' }).click();
+  await expect(conversation).toContainText(title);
+}
+
+async function deleteConversation(page: Page, conversation: Locator): Promise<void> {
+  await conversation.hover();
+  await conversation.getByRole('button', { name: 'Conversation Menu Options' }).click();
+  await page.getByRole('menuitem', { name: 'Delete' }).click();
+
+  const dialog = page.getByRole('dialog', { name: 'Delete chat?' });
+  await expect(dialog).toBeVisible();
+  const [response] = await Promise.all([
+    page.waitForResponse(
+      (r) => r.request().method() === 'DELETE' && r.url().includes('/api/convos'),
+      { timeout: 30000 },
+    ),
+    dialog.getByRole('button', { name: 'Delete' }).click(),
+  ]);
+  expect(response.ok()).toBeTruthy();
+}
+
+test.describe('bookmark counts', () => {
+  test.describe.configure({ timeout: 120_000 });
+
+  test('drops a bookmark count to zero when its only conversation is deleted', async ({ page }) => {
+    const tag = uniqueName('E2E Bookmark');
+
+    await startBookmarkableChat(page);
+    await createBookmarkForActiveChat(page, tag);
+    expect(await getTagCount(page, tag)).toBe(1);
+
+    await deleteConversation(page, firstConversation(page));
+
+    await expect.poll(() => getTagCount(page, tag), { timeout: 15000 }).toBe(0);
+  });
+
+  test('keeps a shared bookmark at one when another conversation still uses it', async ({
+    page,
+  }) => {
+    const tag = uniqueName('E2E Shared');
+
+    // Conversation A: create the bookmark (count -> 1).
+    await startBookmarkableChat(page);
+    await createBookmarkForActiveChat(page, tag);
+    const titleA = uniqueName('Bookmark A');
+    await renameConversation(page, firstConversation(page), titleA);
+    expect(await getTagCount(page, tag)).toBe(1);
+
+    // Conversation B: attach the same bookmark (count -> 2).
+    await startBookmarkableChat(page);
+    await addExistingBookmarkToActiveChat(page, tag);
+    const titleB = uniqueName('Bookmark B');
+    await renameConversation(page, firstConversation(page), titleB);
+    expect(await getTagCount(page, tag)).toBe(2);
+
+    // Deleting A leaves the count at 1 because B still carries the bookmark.
+    const conversationA = page.getByTestId('convo-item').filter({ hasText: titleA });
+    await deleteConversation(page, conversationA);
+
+    await expect.poll(() => getTagCount(page, tag), { timeout: 15000 }).toBe(1);
+    await expect(page.getByTestId('convo-item').filter({ hasText: titleB })).toBeVisible();
+  });
+});
diff --git a/packages/data-provider/src/react-query/react-query-service.ts b/packages/data-provider/src/react-query/react-query-service.ts
index 59430c78d1..509a3d8ce9 100644
--- a/packages/data-provider/src/react-query/react-query-service.ts
+++ b/packages/data-provider/src/react-query/react-query-service.ts
@@ -133,6 +133,7 @@ export const useClearConversationsMutation = (): UseMutationResult<unknown> => {
   return useMutation(() => dataService.clearAllConversations(), {
     onSuccess: () => {
       queryClient.invalidateQueries([QueryKeys.allConversations]);
+      queryClient.invalidateQueries([QueryKeys.conversationTags]);
     },
   });
 };
diff --git a/packages/data-schemas/src/methods/conversation.spec.ts b/packages/data-schemas/src/methods/conversation.spec.ts
index 94a677b113..1d9621cc0f 100644
--- a/packages/data-schemas/src/methods/conversation.spec.ts
+++ b/packages/data-schemas/src/methods/conversation.spec.ts
@@ -1,8 +1,8 @@
 import mongoose from 'mongoose';
 import { v4 as uuidv4 } from 'uuid';
+import { MongoMemoryServer } from 'mongodb-memory-server';
 import { EModelEndpoint, RetentionMode } from 'librechat-data-provider';
 import type { IChatProject, IConversation } from '../types';
-import { MongoMemoryServer } from 'mongodb-memory-server';
 import { ConversationMethods, createConversationMethods } from './conversation';
 import { tenantStorage, runAsSystem } from '~/config/tenantContext';
 import { createModels } from '../models';
@@ -17,6 +17,12 @@ jest.mock('~/config/winston', () => ({
 let mongoServer: InstanceType<typeof MongoMemoryServer>;
 let Conversation: mongoose.Model<IConversation>;
 let ChatProject: mongoose.Model<IChatProject>;
+let ConversationTag: mongoose.Model<{
+  user: string;
+  tag: string;
+  count: number;
+  position: number;
+}>;
 let modelsToCleanup: string[] = [];
 
 // Mock message methods (same as original test mocking ./Message)
@@ -34,6 +40,12 @@ beforeAll(async () => {
   Object.assign(mongoose.models, models);
   Conversation = mongoose.models.Conversation as mongoose.Model<IConversation>;
   ChatProject = mongoose.models.ChatProject as mongoose.Model<IChatProject>;
+  ConversationTag = mongoose.models.ConversationTag as mongoose.Model<{
+    user: string;
+    tag: string;
+    count: number;
+    position: number;
+  }>;
 
   methods = createConversationMethods(mongoose, { getMessages, deleteMessages });
 
@@ -94,6 +106,7 @@ describe('Conversation Operations', () => {
     // Clear database
     await Conversation.deleteMany({});
     await ChatProject.deleteMany({});
+    await ConversationTag.deleteMany({});
 
     // Reset mocks
     jest.clearAllMocks();
@@ -971,6 +984,153 @@ describe('Conversation Operations', () => {
         'Conversation not found or already deleted.',
       );
     });
+
+    it('should decrement tag counts for a deleted bookmarked conversation', async () => {
+      await ConversationTag.create({ user: 'user123', tag: 'work', count: 2, position: 1 });
+      const convoId = uuidv4();
+      await Conversation.create({
+        conversationId: convoId,
+        user: 'user123',
+        endpoint: EModelEndpoint.openAI,
+        tags: ['work'],
+      });
+
+      await deleteConvos('user123', { conversationId: convoId });
+
+      const tag = await ConversationTag.findOne({ user: 'user123', tag: 'work' }).lean();
+      expect(tag?.count).toBe(1);
+    });
+
+    it('should decrement counts for every tag on the deleted conversation', async () => {
+      await ConversationTag.create({ user: 'user123', tag: 'work', count: 3, position: 1 });
+      await ConversationTag.create({ user: 'user123', tag: 'personal', count: 1, position: 2 });
+      const convoId = uuidv4();
+      await Conversation.create({
+        conversationId: convoId,
+        user: 'user123',
+        endpoint: EModelEndpoint.openAI,
+        tags: ['work', 'personal'],
+      });
+
+      await deleteConvos('user123', { conversationId: convoId });
+
+      const work = await ConversationTag.findOne({ user: 'user123', tag: 'work' }).lean();
+      const personal = await ConversationTag.findOne({ user: 'user123', tag: 'personal' }).lean();
+      expect(work?.count).toBe(2);
+      expect(personal?.count).toBe(0);
+    });
+
+    it('should decrement a shared tag once per deleted conversation when clearing all', async () => {
+      await ConversationTag.create({ user: 'user123', tag: 'work', count: 2, position: 1 });
+      await Conversation.create({
+        conversationId: uuidv4(),
+        user: 'user123',
+        endpoint: EModelEndpoint.openAI,
+        tags: ['work'],
+      });
+      await Conversation.create({
+        conversationId: uuidv4(),
+        user: 'user123',
+        endpoint: EModelEndpoint.openAI,
+        tags: ['work'],
+      });
+
+      await deleteConvos('user123', {});
+
+      const tag = await ConversationTag.findOne({ user: 'user123', tag: 'work' }).lean();
+      expect(tag?.count).toBe(0);
+    });
+
+    it('should not double-decrement duplicate tag entries within one conversation', async () => {
+      await ConversationTag.create({ user: 'user123', tag: 'work', count: 2, position: 1 });
+      const convoId = uuidv4();
+      await Conversation.create({
+        conversationId: convoId,
+        user: 'user123',
+        endpoint: EModelEndpoint.openAI,
+        tags: ['work', 'work'],
+      });
+
+      await deleteConvos('user123', { conversationId: convoId });
+
+      const tag = await ConversationTag.findOne({ user: 'user123', tag: 'work' }).lean();
+      expect(tag?.count).toBe(1);
+    });
+
+    it('should clamp tag counts at zero and never go negative', async () => {
+      await ConversationTag.create({ user: 'user123', tag: 'work', count: 0, position: 1 });
+      const convoId = uuidv4();
+      await Conversation.create({
+        conversationId: convoId,
+        user: 'user123',
+        endpoint: EModelEndpoint.openAI,
+        tags: ['work'],
+      });
+
+      await deleteConvos('user123', { conversationId: convoId });
+
+      const tag = await ConversationTag.findOne({ user: 'user123', tag: 'work' }).lean();
+      expect(tag?.count).toBe(0);
+    });
+
+    it('should not touch tags belonging to another user', async () => {
+      await ConversationTag.create({ user: 'other', tag: 'work', count: 5, position: 1 });
+      const convoId = uuidv4();
+      await Conversation.create({
+        conversationId: convoId,
+        user: 'user123',
+        endpoint: EModelEndpoint.openAI,
+        tags: ['work'],
+      });
+
+      await deleteConvos('user123', { conversationId: convoId });
+
+      const tag = await ConversationTag.findOne({ user: 'other', tag: 'work' }).lean();
+      expect(tag?.count).toBe(5);
+    });
+
+    it('should not decrement tag counts when the delete removed nothing (lost race)', async () => {
+      await ConversationTag.create({ user: 'user123', tag: 'work', count: 2, position: 1 });
+      const convoId = uuidv4();
+      await Conversation.create({
+        conversationId: convoId,
+        user: 'user123',
+        endpoint: EModelEndpoint.openAI,
+        tags: ['work'],
+      });
+
+      const deleteSpy = jest
+        .spyOn(Conversation, 'deleteMany')
+        .mockResolvedValueOnce({ acknowledged: true, deletedCount: 0 } as never);
+
+      await deleteConvos('user123', { conversationId: convoId });
+
+      deleteSpy.mockRestore();
+      const tag = await ConversationTag.findOne({ user: 'user123', tag: 'work' }).lean();
+      expect(tag?.count).toBe(2);
+    });
+
+    it('should still decrement tag counts when message deletion fails after the delete', async () => {
+      await ConversationTag.create({ user: 'user123', tag: 'work', count: 2, position: 1 });
+      const convoId = uuidv4();
+      await Conversation.create({
+        conversationId: convoId,
+        user: 'user123',
+        endpoint: EModelEndpoint.openAI,
+        tags: ['work'],
+      });
+
+      deleteMessages.mockRejectedValueOnce(new Error('message cleanup failed'));
+
+      await expect(deleteConvos('user123', { conversationId: convoId })).rejects.toThrow(
+        'message cleanup failed',
+      );
+
+      const tag = await ConversationTag.findOne({ user: 'user123', tag: 'work' }).lean();
+      expect(tag?.count).toBe(1);
+      const convo = await Conversation.findOne({ conversationId: convoId });
+      expect(convo).toBeNull();
+    });
   });
 
   describe('deleteNullOrEmptyConversations', () => {
diff --git a/packages/data-schemas/src/methods/conversation.ts b/packages/data-schemas/src/methods/conversation.ts
index 862dc2468d..cc2594fd26 100644
--- a/packages/data-schemas/src/methods/conversation.ts
+++ b/packages/data-schemas/src/methods/conversation.ts
@@ -11,6 +11,7 @@ import { buildRetentionVisibilityFilter, createFallbackRetentionDate } from '~/u
 import { createTempChatExpirationDate } from '~/utils/tempChatRetention';
 import { tenantSafeBulkWrite } from '~/utils/tenantBulkWrite';
 import { isValidObjectIdString } from '~/utils/objectId';
+import { decrementTagCounts } from './conversationTag';
 import logger from '~/config/winston';
 
 export interface ConversationMethods {
@@ -748,7 +749,7 @@ export function createConversationMethods(
       const { deleteMessages } = getMessageMethods();
       const userFilter = { ...filter, user };
       const conversations = await Conversation.find(userFilter).select(
-        'conversationId chatProjectId',
+        'conversationId chatProjectId tags',
       );
       const conversationIds = conversations.map((c) => c.conversationId);
       const projectIds = new Set(
@@ -757,22 +758,58 @@ export function createConversationMethods(
           .filter((projectId): projectId is string => Boolean(projectId)),
       );
 
+      /**
+       * One entry per (conversation, tag) association: each conversation's tags are
+       * deduped so a duplicate tag entry within a single conversation only decrements
+       * the bookmark count once.
+       */
+      const tagDecrements: string[] = [];
+      for (const conversation of conversations) {
+        if (!conversation.tags?.length) {
+          continue;
+        }
+        for (const tag of new Set(conversation.tags)) {
+          tagDecrements.push(tag);
+        }
+      }
+
       if (!conversationIds.length) {
         throw new Error('Conversation not found or already deleted.');
       }
 
       const deleteConvoResult = await Conversation.deleteMany(userFilter);
+      const deleted = deleteConvoResult.deletedCount > 0;
+
+      /**
+       * Reconcile bookmark counts from the deletion before message cleanup: if
+       * `deleteMessages` later throws, the conversation is already gone and a retry
+       * finds nothing, so the count must be reconciled here or it would stay stale.
+       * The decrement is best-effort and never throws, so it cannot block message
+       * cleanup. The `deletedCount` guard skips a losing concurrent delete whose
+       * pre-delete snapshot would otherwise decrement a conversation it did not
+       * actually remove.
+       */
+      if (deleted) {
+        await decrementTagCounts(mongoose, user, tagDecrements);
+      }
 
       const deleteMessagesResult = await deleteMessages({
         conversationId: { $in: conversationIds },
         user,
       });
 
-      await Promise.all(
-        [...projectIds].map((projectId) =>
-          refreshChatProjectStatsForUser(mongoose, user, projectId),
-        ),
-      );
+      /**
+       * Refresh project stats after message cleanup so a stats-refresh error cannot
+       * prevent `deleteMessages` from running, which would orphan the deleted
+       * conversations' messages.
+       */
+      if (deleted && projectIds.size > 0) {
+        await Promise.all(
+          [...projectIds].map((projectId) =>
+            refreshChatProjectStatsForUser(mongoose, user, projectId),
+          ),
+        );
+      }
 
       return { ...deleteConvoResult, messages: deleteMessagesResult };
     } catch (error) {
diff --git a/packages/data-schemas/src/methods/conversationTag.ts b/packages/data-schemas/src/methods/conversationTag.ts
index c4f239c07d..be65f6b446 100644
--- a/packages/data-schemas/src/methods/conversationTag.ts
+++ b/packages/data-schemas/src/methods/conversationTag.ts
@@ -12,6 +12,54 @@ interface IConversationTag {
   [key: string]: unknown;
 }
 
+/**
+ * Atomically decrements tag counts for a user. Each entry in `tags` counts as a
+ * single decrement, so callers must dedupe tags per conversation before flattening
+ * to avoid double-decrementing a conversation's duplicate tag entries. Counts are
+ * clamped at zero to tolerate any pre-existing drift.
+ */
+export async function decrementTagCounts(
+  mongoose: typeof import('mongoose'),
+  user: string,
+  tags: string[],
+): Promise<void> {
+  if (!tags.length) {
+    return;
+  }
+
+  const decrementByTag = new Map<string, number>();
+  for (const tag of tags) {
+    if (!tag) {
+      continue;
+    }
+    decrementByTag.set(tag, (decrementByTag.get(tag) ?? 0) + 1);
+  }
+
+  if (decrementByTag.size === 0) {
+    return;
+  }
+
+  try {
+    const ConversationTag = mongoose.models.ConversationTag as Model<IConversationTag>;
+    const bulkOps = [...decrementByTag.entries()].map(([tag, amount]) => ({
+      updateOne: {
+        filter: { user, tag },
+        update: [
+          {
+            $set: {
+              count: { $max: [0, { $subtract: [{ $ifNull: ['$count', 0] }, amount] }] },
+            },
+          },
+        ],
+      },
+    }));
+
+    await tenantSafeBulkWrite(ConversationTag, bulkOps);
+  } catch (error) {
+    logger.error('[decrementTagCounts] Error decrementing tag counts', error);
+  }
+}
+
 export function createConversationTagMethods(mongoose: typeof import('mongoose')): {
   getConversationTags: (user: string) => Promise<
     (import('mongoose').FlattenMaps<{