diff --git a/apps/sim/app/workspace/[workspaceId]/integrations/connected/[credentialId]/connected-credential-detail.tsx b/apps/sim/app/workspace/[workspaceId]/integrations/connected/[credentialId]/connected-credential-detail.tsx
index 2b1ae99f392..0a0962db7e6 100644
--- a/apps/sim/app/workspace/[workspaceId]/integrations/connected/[credentialId]/connected-credential-detail.tsx
+++ b/apps/sim/app/workspace/[workspaceId]/integrations/connected/[credentialId]/connected-credential-detail.tsx
@@ -46,7 +46,6 @@ import {
 } from '@/hooks/queries/credentials'
 import {
   useConnectOAuthService,
-  useDisconnectOAuthService,
   useOAuthConnections,
 } from '@/hooks/queries/oauth/oauth-connections'
 import { useOAuthReturnRouter } from '@/hooks/use-oauth-return'
@@ -74,7 +73,6 @@ export function ConnectedCredentialDetail({
 
   const { data: oauthConnections = [] } = useOAuthConnections()
   const connectOAuthService = useConnectOAuthService()
-  const disconnectOAuthService = useDisconnectOAuthService()
   const createDraft = useCreateCredentialDraft()
   const deleteCredential = useDeleteWorkspaceCredential()
 
@@ -146,30 +144,15 @@ export function ConnectedCredentialDetail({
     }
   }
 
+  /**
+   * Every credential type disconnects through the workspace-scoped credential
+   * delete, which authorizes against credential admin — explicit members and
+   * derived workspace admins alike.
+   */
   const handleConfirmDelete = async () => {
     if (!credential) return
     try {
-      if (credential.type === 'service_account') {
-        await deleteCredential.mutateAsync(credential.id)
-      } else {
-        if (!credential.accountId || !credential.providerId) {
-          toast.error("Can't disconnect", {
-            description: 'Missing account information. Try reconnecting this credential first.',
-          })
-          return
-        }
-        await disconnectOAuthService.mutateAsync({
-          provider: credential.providerId.split('-')[0] || credential.providerId,
-          providerId: credential.providerId,
-          serviceId: credential.providerId,
-          accountId: credential.accountId,
-        })
-        window.dispatchEvent(
-          new CustomEvent('oauth-credentials-updated', {
-            detail: { providerId: credential.providerId, workspaceId },
-          })
-        )
-      }
+      await deleteCredential.mutateAsync(credential.id)
       setShowDeleteConfirmDialog(false)
       router.push(integrationsHref)
     } catch (error) {
@@ -207,7 +190,7 @@ export function ConnectedCredentialDetail({
         </Chip>
         <Chip
           onClick={() => setShowDeleteConfirmDialog(true)}
-          disabled={disconnectOAuthService.isPending || deleteCredential.isPending}
+          disabled={deleteCredential.isPending}
         >
           Disconnect
         </Chip>
@@ -303,7 +286,7 @@ export function ConnectedCredentialDetail({
         confirm={{
           label: 'Disconnect',
           onClick: handleConfirmDelete,
-          pending: disconnectOAuthService.isPending || deleteCredential.isPending,
+          pending: deleteCredential.isPending,
           pendingLabel: 'Disconnecting...',
         }}
       />
diff --git a/apps/sim/components/permissions/role-lock.tsx b/apps/sim/components/permissions/role-lock.tsx
index a3f6af078c1..4b6fed19f04 100644
--- a/apps/sim/components/permissions/role-lock.tsx
+++ b/apps/sim/components/permissions/role-lock.tsx
@@ -54,6 +54,9 @@ interface RoleLockTooltipProps {
 /**
  * Wraps a disabled role control in a tooltip explaining why the role is fixed.
  * Renders children unchanged when there is no lock reason.
+ *
+ * The trigger is a `grid` so the wrapper stays layout-transparent; a
+ * shrink-to-content wrapper would size locked and unlocked rows differently.
  */
 export function RoleLockTooltip({ reason, children }: RoleLockTooltipProps) {
   if (!reason) return <>{children}</>
@@ -61,7 +64,7 @@ export function RoleLockTooltip({ reason, children }: RoleLockTooltipProps) {
   return (
     <Tooltip.Root>
       <Tooltip.Trigger asChild>
-        <div className='inline-flex'>{children}</div>
+        <div className='grid'>{children}</div>
       </Tooltip.Trigger>
       <Tooltip.Content>{reason}</Tooltip.Content>
     </Tooltip.Root>
diff --git a/apps/sim/hooks/queries/credentials.ts b/apps/sim/hooks/queries/credentials.ts
index 8d931e4e20e..3f0dceb37a3 100644
--- a/apps/sim/hooks/queries/credentials.ts
+++ b/apps/sim/hooks/queries/credentials.ts
@@ -20,6 +20,7 @@ import {
   type WorkspaceCredentialType,
 } from '@/lib/api/contracts'
 import { environmentKeys } from '@/hooks/queries/environment'
+import { oauthConnectionsKeys } from '@/hooks/queries/oauth/oauth-connections'
 import { workspaceCredentialKeys } from '@/hooks/queries/utils/credential-keys'
 import {
   fetchWorkspaceCredentialList,
@@ -211,6 +212,7 @@ export function useDeleteWorkspaceCredential() {
       queryClient.invalidateQueries({ queryKey: workspaceCredentialKeys.lists() })
       queryClient.invalidateQueries({ queryKey: OAUTH_CREDENTIALS_KEY })
       queryClient.invalidateQueries({ queryKey: environmentKeys.all })
+      queryClient.invalidateQueries({ queryKey: oauthConnectionsKeys.connections() })
     },
   })
 }
diff --git a/apps/sim/hooks/queries/oauth/oauth-connections.ts b/apps/sim/hooks/queries/oauth/oauth-connections.ts
index e3a5becbc0b..a1fa1e29813 100644
--- a/apps/sim/hooks/queries/oauth/oauth-connections.ts
+++ b/apps/sim/hooks/queries/oauth/oauth-connections.ts
@@ -3,7 +3,6 @@ import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
 import { requestJson } from '@/lib/api/client/request'
 import {
   type ConnectedAccount,
-  disconnectOAuthContract,
   listOAuthConnectionsContract,
   type OAuthAccountSummary,
   type OAuthConnection,
@@ -199,68 +198,5 @@ export function useConnectOAuthService() {
   })
 }
 
-interface DisconnectServiceParams {
-  provider: string
-  providerId?: string
-  serviceId: string
-  accountId?: string
-}
-
-/**
- * Disconnects an OAuth service account.
- * Performs optimistic update and rolls back on failure.
- */
-export function useDisconnectOAuthService() {
-  const queryClient = useQueryClient()
-
-  return useMutation({
-    mutationFn: async ({ provider, providerId, accountId }: DisconnectServiceParams) => {
-      return requestJson(disconnectOAuthContract, {
-        body: {
-          provider,
-          providerId,
-          accountId,
-        },
-      })
-    },
-    onMutate: async ({ serviceId, accountId }) => {
-      await queryClient.cancelQueries({ queryKey: oauthConnectionsKeys.connections() })
-
-      const previousServices = queryClient.getQueryData<ServiceInfo[]>(
-        oauthConnectionsKeys.connections()
-      )
-
-      if (previousServices) {
-        queryClient.setQueryData<ServiceInfo[]>(
-          oauthConnectionsKeys.connections(),
-          previousServices.map((svc) => {
-            if (svc.id === serviceId) {
-              const updatedAccounts =
-                accountId && svc.accounts ? svc.accounts.filter((acc) => acc.id !== accountId) : []
-              return {
-                ...svc,
-                accounts: updatedAccounts,
-                isConnected: updatedAccounts.length > 0,
-              }
-            }
-            return svc
-          })
-        )
-      }
-
-      return { previousServices }
-    },
-    onError: (_err, _variables, context) => {
-      if (context?.previousServices) {
-        queryClient.setQueryData(oauthConnectionsKeys.connections(), context.previousServices)
-      }
-      logger.error('Failed to disconnect service')
-    },
-    onSettled: () => {
-      queryClient.invalidateQueries({ queryKey: oauthConnectionsKeys.connections() })
-    },
-  })
-}
-
 /** Connected OAuth account for a specific provider. */
 export type { ConnectedAccount }
diff --git a/apps/sim/lib/credentials/application/service-account.test.ts b/apps/sim/lib/credentials/application/service-account.test.ts
index 6dc2ece8096..dbdf310231e 100644
--- a/apps/sim/lib/credentials/application/service-account.test.ts
+++ b/apps/sim/lib/credentials/application/service-account.test.ts
@@ -13,7 +13,6 @@ const mocks = vi.hoisted(() => ({
   requireProvider: vi.fn(),
   getCredential: vi.fn(),
   getActor: vi.fn(),
-  delete: vi.fn(),
   deleteRecord: vi.fn(),
   capture: vi.fn(),
 }))
@@ -29,7 +28,6 @@ vi.mock('@sim/platform-authz/workspace', () => ({
 }))
 vi.mock('@/lib/credentials/orchestration', () => ({
   createServiceAccountCredential: mocks.create,
-  deleteConnectionCredential: mocks.delete,
   deleteCredentialRecord: mocks.deleteRecord,
 }))
 vi.mock('@/lib/credentials/application/provider-catalog', () => ({
@@ -96,7 +94,6 @@ describe('credential service-account application operations', () => {
       auditMetadata: { tenantId: 'tenant-1' },
     })
     mocks.listCatalog.mockResolvedValue([{ providerId: 'zoom-service-account' }])
-    mocks.delete.mockResolvedValue(true)
     mocks.deleteRecord.mockResolvedValue(true)
     mocks.requireProvider.mockReturnValue({
       type: 'service_account',
@@ -196,7 +193,7 @@ describe('credential service-account application operations', () => {
       code: 'forbidden',
       detailCode: 'CREDENTIAL_ADMIN_ACCESS_REQUIRED',
     })
-    expect(mocks.delete).not.toHaveBeenCalled()
+    expect(mocks.deleteRecord).not.toHaveBeenCalled()
   })
 
   it('rejects workspace keys before canonical loading on disconnect', async () => {
@@ -215,7 +212,7 @@ describe('credential service-account application operations', () => {
     })
     expect(mocks.loadWorkspace).not.toHaveBeenCalled()
     expect(mocks.getActor).not.toHaveBeenCalled()
-    expect(mocks.delete).not.toHaveBeenCalled()
+    expect(mocks.deleteRecord).not.toHaveBeenCalled()
   })
 
   it('allows an explicit credential admin with workspace read access to disconnect', async () => {
@@ -227,7 +224,7 @@ describe('credential service-account application operations', () => {
         input: { workspaceId: WORKSPACE_ID, credentialId: credential.id },
       })
     ).resolves.toEqual({ credential, deleted: true })
-    expect(mocks.delete).toHaveBeenCalledOnce()
+    expect(mocks.deleteRecord).toHaveBeenCalledOnce()
   })
 
   it('applies credential admin policy during authorization-only checks', async () => {
@@ -237,7 +234,7 @@ describe('credential service-account application operations', () => {
     })
 
     expect(mocks.getActor).toHaveBeenCalledWith(credential.id, principal.userId)
-    expect(mocks.delete).not.toHaveBeenCalled()
+    expect(mocks.deleteRecord).not.toHaveBeenCalled()
   })
 
   it('enforces personal-key workspace policy before credential authorization', async () => {
@@ -253,7 +250,7 @@ describe('credential service-account application operations', () => {
       detailCode: 'PERSONAL_API_KEYS_DISABLED',
     })
     expect(mocks.getActor).not.toHaveBeenCalled()
-    expect(mocks.delete).not.toHaveBeenCalled()
+    expect(mocks.deleteRecord).not.toHaveBeenCalled()
   })
 
   it('disconnects an administered credential', async () => {
@@ -263,15 +260,38 @@ describe('credential service-account application operations', () => {
     })
 
     expect(result).toEqual({ credential, deleted: true })
-    expect(mocks.delete).toHaveBeenCalledWith({
-      credentialId: credential.id,
-      workspaceId: WORKSPACE_ID,
+    expect(mocks.deleteRecord).toHaveBeenCalledWith({ credential, reason: 'user_delete' })
+  })
+
+  it('deletes every type through the record manager so secret sources are torn down', async () => {
+    const oauthCredential = {
+      ...credential,
+      type: 'oauth',
+      providerId: 'google-email',
+      accountId: 'acct-1',
+    }
+    mocks.getCredential.mockResolvedValue(oauthCredential)
+    mocks.getActor.mockResolvedValue({
+      credential: oauthCredential,
+      member: { role: 'admin' },
+      hasWorkspaceAccess: true,
+      isAdmin: true,
+    })
+
+    const result = await deleteCredentialUseCase.execute({
+      principal,
+      input: { workspaceId: WORKSPACE_ID, credentialId: oauthCredential.id },
+    })
+
+    expect(result).toEqual({ credential: oauthCredential, deleted: true })
+    expect(mocks.deleteRecord).toHaveBeenCalledWith({
+      credential: oauthCredential,
       reason: 'user_delete',
     })
   })
 
   it('treats a concurrent disconnect as an idempotent success', async () => {
-    mocks.delete.mockResolvedValue(false)
+    mocks.deleteRecord.mockResolvedValue(false)
 
     const result = await deleteCredentialUseCase.execute({
       principal,
diff --git a/apps/sim/lib/credentials/application/service-account.ts b/apps/sim/lib/credentials/application/service-account.ts
index 078cb50f04d..fe3c058ba77 100644
--- a/apps/sim/lib/credentials/application/service-account.ts
+++ b/apps/sim/lib/credentials/application/service-account.ts
@@ -15,7 +15,6 @@ import {
 import {
   type CreateServiceAccountCredentialParams,
   createServiceAccountCredential,
-  deleteConnectionCredential,
   deleteCredentialRecord,
 } from '@/lib/credentials/orchestration'
 import type { CredentialRow } from '@/lib/credentials/queries'
@@ -159,14 +158,7 @@ export const deleteCredentialUseCase = defineAuthorizedCredentialUseCase({
       )
     }
     const reason = principal.kind === 'delegated' ? 'copilot_delete' : 'user_delete'
-    const deleted =
-      context.credential.type === 'oauth' || context.credential.type === 'service_account'
-        ? await deleteConnectionCredential({
-            credentialId: context.credential.id,
-            workspaceId: context.workspaceId,
-            reason,
-          })
-        : await deleteCredentialRecord({ credential: context.credential, reason })
+    const deleted = await deleteCredentialRecord({ credential: context.credential, reason })
     return { credential: context.credential, deleted }
   },
   projectAudit: ({ principal, result }) => {
diff --git a/apps/sim/lib/credentials/deletion.ts b/apps/sim/lib/credentials/deletion.ts
index f16902ddf04..f2b8d866c29 100644
--- a/apps/sim/lib/credentials/deletion.ts
+++ b/apps/sim/lib/credentials/deletion.ts
@@ -2,7 +2,7 @@ import { AuditAction, AuditResourceType, recordAudit } from '@sim/audit'
 import { db } from '@sim/db'
 import * as schema from '@sim/db/schema'
 import { createLogger } from '@sim/logger'
-import { and, eq, or, sql } from 'drizzle-orm'
+import { and, eq, notExists, or, sql } from 'drizzle-orm'
 import type { NextRequest } from 'next/server'
 import { CREDENTIAL_SUBBLOCK_IDS } from '@/lib/workflows/persistence/utils'
 
@@ -101,6 +101,39 @@ export async function deleteConnectionCredential(
   return deleted.length === 1
 }
 
+/**
+ * Deletes the stored OAuth grant behind a credential once nothing references
+ * it. The `account` row is an OAuth credential's secret source, so leaving it
+ * behind keeps a usable grant; nothing is revoked provider-side.
+ *
+ * Scoped by `accountId`, not by owner — the caller is already authorized
+ * against the credential, which may belong to another user.
+ *
+ * The reference check is a predicate on the delete: `credential.accountId` is
+ * `ON DELETE CASCADE`, so a credential racing a separate check would be reaped
+ * by Postgres without {@link clearCredentialRefs} ever running.
+ */
+export async function deleteOrphanedOAuthAccount(accountId: string): Promise<void> {
+  const deleted = await db
+    .delete(schema.account)
+    .where(
+      and(
+        eq(schema.account.id, accountId),
+        notExists(
+          db
+            .select({ referenced: sql`1` })
+            .from(schema.credential)
+            .where(eq(schema.credential.accountId, accountId))
+        )
+      )
+    )
+    .returning({ id: schema.account.id })
+
+  if (deleted.length > 0) {
+    logger.info('Deleted orphaned OAuth account', { accountId })
+  }
+}
+
 /**
  * Clears stored references to a credential across mutable workspace state
  * (editor blocks, copilot checkpoints, knowledge connectors) and frozen
diff --git a/apps/sim/lib/credentials/draft-hooks.ts b/apps/sim/lib/credentials/draft-hooks.ts
index 704a22c25fb..cec4f1e607a 100644
--- a/apps/sim/lib/credentials/draft-hooks.ts
+++ b/apps/sim/lib/credentials/draft-hooks.ts
@@ -4,6 +4,7 @@ import * as schema from '@sim/db/schema'
 import { createLogger } from '@sim/logger'
 import { generateId } from '@sim/utils/id'
 import { and, eq, sql } from 'drizzle-orm'
+import { deleteOrphanedOAuthAccount } from '@/lib/credentials/deletion'
 import { clearDeadFlag } from '@/lib/oauth/terminal-errors'
 import { captureServerEvent } from '@/lib/posthog/server'
 
@@ -184,15 +185,6 @@ export async function handleReconnectCredential(params: {
   })
 
   if (oldAccountId) {
-    const [stillReferenced] = await db
-      .select({ id: schema.credential.id })
-      .from(schema.credential)
-      .where(eq(schema.credential.accountId, oldAccountId))
-      .limit(1)
-
-    if (!stillReferenced) {
-      await db.delete(schema.account).where(eq(schema.account.id, oldAccountId))
-      logger.info('Deleted orphaned account after reconnect', { accountId: oldAccountId })
-    }
+    await deleteOrphanedOAuthAccount(oldAccountId)
   }
 }
diff --git a/apps/sim/lib/credentials/orchestration/index.test.ts b/apps/sim/lib/credentials/orchestration/index.test.ts
index 8ea6c8954b8..47064858db5 100644
--- a/apps/sim/lib/credentials/orchestration/index.test.ts
+++ b/apps/sim/lib/credentials/orchestration/index.test.ts
@@ -18,6 +18,7 @@ const {
   mockIsClientCredentialAccountProviderId,
   mockGetClientCredentialAccountDescriptor,
   mockDeleteConnectionCredential,
+  mockDeleteOrphanedOAuthAccount,
 } = vi.hoisted(() => ({
   mockRecordAudit: vi.fn(),
   mockGetCredentialActorContext: vi.fn(),
@@ -28,6 +29,7 @@ const {
   // providers must not trigger the stored-blob read for authMethod/username.
   mockGetClientCredentialAccountDescriptor: vi.fn(() => undefined),
   mockDeleteConnectionCredential: vi.fn(),
+  mockDeleteOrphanedOAuthAccount: vi.fn(),
 }))
 
 vi.mock('@sim/audit', () => ({
@@ -51,6 +53,7 @@ vi.mock('@/lib/credentials/client-credential-accounts/descriptors', () => ({
 }))
 vi.mock('@/lib/credentials/deletion', () => ({
   deleteConnectionCredential: mockDeleteConnectionCredential,
+  deleteOrphanedOAuthAccount: mockDeleteOrphanedOAuthAccount,
 }))
 vi.mock('@/lib/credentials/environment', () => ({
   deleteWorkspaceEnvCredentials: vi.fn(),
@@ -550,4 +553,57 @@ describe('deleteCredentialRecord', () => {
     })
     expect(mockDeleteConnectionCredential).not.toHaveBeenCalled()
   })
+
+  it('revokes the backing OAuth grant of a deleted oauth credential', async () => {
+    mockDeleteConnectionCredential.mockResolvedValueOnce(true)
+
+    const deleted = await deleteCredentialRecord({
+      credential: {
+        id: 'cred-1',
+        workspaceId: 'ws-1',
+        type: 'oauth',
+        providerId: 'google-email',
+        accountId: 'acct-1',
+      } as never,
+      reason: 'user_delete',
+    })
+
+    expect(deleted).toBe(true)
+    expect(mockDeleteOrphanedOAuthAccount).toHaveBeenCalledWith('acct-1')
+  })
+
+  it('leaves the OAuth grant alone when the credential row was already gone', async () => {
+    mockDeleteConnectionCredential.mockResolvedValueOnce(false)
+
+    const deleted = await deleteCredentialRecord({
+      credential: {
+        id: 'cred-1',
+        workspaceId: 'ws-1',
+        type: 'oauth',
+        providerId: 'google-email',
+        accountId: 'acct-1',
+      } as never,
+      reason: 'user_delete',
+    })
+
+    expect(deleted).toBe(false)
+    expect(mockDeleteOrphanedOAuthAccount).not.toHaveBeenCalled()
+  })
+
+  it('does not touch OAuth grants for a service-account credential', async () => {
+    mockDeleteConnectionCredential.mockResolvedValueOnce(true)
+
+    await deleteCredentialRecord({
+      credential: {
+        id: 'cred-1',
+        workspaceId: 'ws-1',
+        type: 'service_account',
+        providerId: 'google-service-account',
+        accountId: 'acct-1',
+      } as never,
+      reason: 'user_delete',
+    })
+
+    expect(mockDeleteOrphanedOAuthAccount).not.toHaveBeenCalled()
+  })
 })
diff --git a/apps/sim/lib/credentials/orchestration/index.ts b/apps/sim/lib/credentials/orchestration/index.ts
index 84fd54888fb..2ca86cb8b07 100644
--- a/apps/sim/lib/credentials/orchestration/index.ts
+++ b/apps/sim/lib/credentials/orchestration/index.ts
@@ -24,7 +24,11 @@ import {
   getClientCredentialAccountDescriptor,
   isClientCredentialAccountProviderId,
 } from '@/lib/credentials/client-credential-accounts/descriptors'
-import { type CredentialDeleteReason, deleteConnectionCredential } from '@/lib/credentials/deletion'
+import {
+  type CredentialDeleteReason,
+  deleteConnectionCredential,
+  deleteOrphanedOAuthAccount,
+} from '@/lib/credentials/deletion'
 import { slackCustomBotDisplayName } from '@/lib/credentials/display-name'
 import {
   deleteWorkspaceEnvCredentials,
@@ -554,6 +558,18 @@ export async function deleteCredentialRecord(
     return true
   }
 
+  if (credentialRow.type === 'oauth') {
+    const deleted = await deleteConnectionCredential({
+      credentialId: credentialRow.id,
+      workspaceId: credentialRow.workspaceId,
+      reason: params.reason,
+    })
+    if (deleted && credentialRow.accountId) {
+      await deleteOrphanedOAuthAccount(credentialRow.accountId)
+    }
+    return deleted
+  }
+
   return deleteConnectionCredential({
     credentialId: credentialRow.id,
     workspaceId: credentialRow.workspaceId,