@@ -0,0 +1,42 @@
+import { deleteAccountContract, getAccountDeletionPlanContract } from '@/lib/api/contracts'
+import {
+  defineInternalJsonRoute,
+  internalOrchestrationErrorPolicy,
+  internalRateLimits,
+  internalSessionAuth,
+} from '@/lib/api/server/routes'
+import {
+  deleteAccountUseCase,
+  previewAccountDeletionUseCase,
+} from '@/lib/users/application/delete-account'
+import { userAccountOperations } from '@/lib/users/application/operations'
+
+export const dynamic = 'force-dynamic'
+
+export const GET = defineInternalJsonRoute({
+  contract: getAccountDeletionPlanContract,
+  auth: internalSessionAuth,
+  operation: userAccountOperations.previewDeletion,
+  rateLimit: internalRateLimits.none({ reason: 'Read-only preview of the caller’s own account' }),
+  errorPolicy: internalOrchestrationErrorPolicy,
+  mapInput: () => ({}),
+  useCase: previewAccountDeletionUseCase,
+  present: (plan) => ({ plan }),
+})
+
+/**
+ * `AccountDeletionBlockedError` classifies itself as a conflict, so the shared
+ * orchestration policy renders a refused deletion as a 409 carrying the first
+ * blocker's sentence. The dialog lists every blocker from the GET above; this
+ * message covers only the race where one appears between the two calls.
+ */
+export const POST = defineInternalJsonRoute({
+  contract: deleteAccountContract,
+  auth: internalSessionAuth,
+  operation: userAccountOperations.delete,
+  rateLimit: internalRateLimits.none({ reason: 'Guarded by the email confirmation it requires' }),
+  errorPolicy: internalOrchestrationErrorPolicy,
+  mapInput: ({ body }) => ({ confirmEmail: body.confirmEmail }),
+  useCase: deleteAccountUseCase,
+  present: () => ({ success: true as const }),
+})
@@ -0,0 +1,160 @@
+'use client'
+
+import { useState } from 'react'
+import { ChipConfirmModal, ChipModalError, ChipModalField } from '@sim/emcn'
+import { createLogger } from '@sim/logger'
+import { sleep } from '@sim/utils/helpers'
+import { formatQuotedNameList, normalizeEmail } from '@sim/utils/string'
+import { signOut } from '@/lib/auth/auth-client'
+import { useAccountDeletionPlan, useDeleteAccount } from '@/hooks/queries/account-deletion'
+import { clearUserData } from '@/stores'
+
+const logger = createLogger('DeleteAccountModal')
+
+/** Matches the naming used in the server's blocker sentences. */
+const MAX_NAMES_LISTED = 3
+
+/** How long the post-deletion sign-out and store cleanup may take before the redirect goes anyway. */
+const SIGN_OUT_TIMEOUT_MS = 3000
+
+interface DeleteAccountModalProps {
+  open: boolean
+  onOpenChange: (open: boolean) => void
+  /** The signed-in account's email, which must be retyped to confirm. */
+  email: string
+}
+
+function names(workspaces: { name: string }[]): string {
+  return formatQuotedNameList(
+    workspaces.map((workspace) => workspace.name),
+    MAX_NAMES_LISTED
+  )
+}
+
+/**
+ * Confirms and performs account deletion.
+ *
+ * The dialog is deliberately explicit rather than alarming: it names every
+ * workspace that goes, every workspace that changes hands, and — when the account
+ * cannot be deleted yet — exactly what has to happen first. Retyping the account's
+ * own email address is the only guard, which is the point: the decision should
+ * cost a deliberate action, not a hunt for the right button.
+ */
+export function DeleteAccountModal({ open, onOpenChange, email }: DeleteAccountModalProps) {
+  const [confirmEmail, setConfirmEmail] = useState('')
+  const { data: plan, isFetching: isPlanFetching, error: planError } = useAccountDeletionPlan(open)
+  const deleteAccount = useDeleteAccount()
+
+  const blockers = plan?.blockers ?? []
+  const toDelete = plan?.workspacesToDelete ?? []
+  const toTransfer = plan?.workspacesToTransfer ?? []
+  const isBlocked = blockers.length > 0
+  const isConfirmed = normalizeEmail(confirmEmail) === normalizeEmail(email)
+  const isPending = deleteAccount.isPending
+
+  const close = () => {
+    onOpenChange(false)
+    setConfirmEmail('')
+    deleteAccount.reset()
+  }
+
+  const handleDelete = () => {
+    deleteAccount.mutate(
+      { confirmEmail },
+      {
+        onSuccess: async () => {
+          /**
+           * The session row is already gone, so signing out can only fail by
+           * telling us so — what matters is that its cookie is dropped and no
+           * cached client state survives the redirect. The race bounds that
+           * cleanup: the account is deleted either way, so a request left hanging
+           * must not strand the user on "Deleting..." forever. The redirect is a
+           * full document load, which discards anything the cleanup missed.
+           */
+          await Promise.race([
+            Promise.allSettled([signOut(), clearUserData()]),
+            sleep(SIGN_OUT_TIMEOUT_MS),
+          ])
+          window.location.href = '/login?fromLogout=true'
+        },
+        onError: (error) => {
+          logger.error('Account deletion failed', { error })
+        },
+      }
+    )
+  }
+
+  const errorMessage =
+    deleteAccount.error?.message ??
+    (planError ? 'Could not check whether this account can be deleted. Try again.' : null)
+
+  return (
+    <ChipConfirmModal
+      open={open}
+      onOpenChange={(next) => {
+        if (!next) close()
+      }}
+      size='md'
+      title='Delete account'
+      confirm={{
+        label: 'Delete account',
+        pendingLabel: 'Deleting...',
+        onClick: handleDelete,
+        pending: isPending,
+        disabled: isBlocked || isPlanFetching || !isConfirmed || !plan,
+        disabledTooltip: isBlocked
+          ? 'Resolve the items above first'
+          : isConfirmed
+            ? undefined
+            : 'Enter your account email to confirm',
+      }}
+    >
+      {isBlocked ? (
+        <div className='flex flex-col gap-2 px-2'>
+          <p className='text-[var(--text-primary)] text-sm'>Your account can’t be deleted yet:</p>
+          <ul className='flex list-disc flex-col gap-1 pl-4'>
+            {blockers.map((blocker) => (
+              <li key={blocker.code} className='text-[var(--text-secondary)] text-sm'>
+                {blocker.message}
+              </li>
+            ))}
+          </ul>
+        </div>
+      ) : (
+        <div className='flex flex-col gap-2 px-2'>
+          <p className='text-[var(--text-primary)] text-sm'>
+            This permanently deletes <span className='font-medium'>{email}</span> along with its
+            workflows, chats, files, knowledge bases and credentials.{' '}
+            <span className='text-[var(--text-error)]'>This cannot be undone.</span>
+          </p>
+          {toDelete.length > 0 && (
+            <p className='text-[var(--text-secondary)] text-sm'>
+              {toDelete.length === 1 ? 'The workspace ' : 'The workspaces '}
+              <span className='text-[var(--text-primary)]'>{names(toDelete)}</span> and everything
+              in {toDelete.length === 1 ? 'it' : 'them'} will be deleted.
+            </p>
+          )}
+          {toTransfer.length > 0 && (
+            <p className='text-[var(--text-secondary)] text-sm'>
+              Billing for <span className='text-[var(--text-primary)]'>{names(toTransfer)}</span>{' '}
+              moves to another admin. Nothing in {toTransfer.length === 1 ? 'it' : 'them'} changes.
+            </p>
+          )}
+        </div>
+      )}
+      {!isBlocked && (
+        <ChipModalField
+          type='email'
+          title='Confirm your email'
+          value={confirmEmail}
+          onChange={setConfirmEmail}
+          placeholder={email}
+          autoComplete='off'
+          disabled={isPending || isPlanFetching}
+          required
+        />
+      )}
+      <ChipModalError>{errorMessage}</ChipModalError>
+    </ChipConfirmModal>
+  )
+}
@@ -3,6 +3,7 @@
 import { useEffect, useRef, useState } from 'react'
 import {
   Button,
+  Chip,
   ChipCombobox,
   ChipModal,
   ChipModalBody,
@@ -26,6 +27,7 @@ import { ANONYMOUS_USER_ID } from '@/lib/auth/constants'
 import { isHosted } from '@/lib/core/config/env-flags'
 import { getBrowserTimezone, getTimezoneOptions } from '@/lib/core/utils/timezone'
 import { getBaseUrl } from '@/lib/core/utils/urls'
+import { DeleteAccountModal } from '@/app/workspace/[workspaceId]/settings/components/general/components/delete-account-modal'
 import type { SettingsAction } from '@/app/workspace/[workspaceId]/settings/components/settings-header/settings-header'
 import { SettingsPanel } from '@/app/workspace/[workspaceId]/settings/components/settings-panel'
 import { SettingsSection } from '@/app/workspace/[workspaceId]/settings/components/settings-section/settings-section'
@@ -93,6 +95,8 @@ export function General() {
   const [showResetPasswordModal, setShowResetPasswordModal] = useState(false)
   const resetPassword = useResetPassword()
 
+  const [showDeleteAccountModal, setShowDeleteAccountModal] = useState(false)
+
   const [uploadError, setUploadError] = useState<string | null>(null)
 
   const snapToGridValue = settings?.snapToGridSize ?? 0
@@ -572,6 +576,21 @@ export function General() {
             </p>
           </div>
         </SettingsSection>
+
+        {!isAuthDisabled && (
+          <SettingsSection label='Account'>
+            <div className='flex flex-col gap-3'>
+              <div className='flex items-center justify-between'>
+                <Label>Delete account</Label>
+                <Chip onClick={() => setShowDeleteAccountModal(true)}>Delete</Chip>
+              </div>
+              <p className='text-[var(--text-muted)] text-small'>
+                Permanently deletes your account and everything only you can reach — workflows,
+                chats, files, knowledge bases and credentials. This cannot be undone.
+              </p>
+            </div>
+          </SettingsSection>
+        )}
       </SettingsPanel>
 
       <ChipModal
@@ -604,6 +623,12 @@ export function General() {
           }}
         />
       </ChipModal>
+
+      <DeleteAccountModal
+        open={showDeleteAccountModal}
+        onOpenChange={setShowDeleteAccountModal}
+        email={profile?.email || ''}
+      />
     </>
   )
 }
@@ -0,0 +1,54 @@
+import { useMutation, useQuery } from '@tanstack/react-query'
+import { requestJson } from '@/lib/api/client/request'
+import {
+  type AccountDeletionPlan,
+  type DeleteAccountBody,
+  deleteAccountContract,
+  getAccountDeletionPlanContract,
+} from '@/lib/api/contracts/user'
+
+export const accountDeletionKeys = {
+  all: ['account-deletion'] as const,
+  plan: () => [...accountDeletionKeys.all, 'plan'] as const,
+}
+
+/**
+ * Zero: the plan is a consent disclosure, so every dialog open must refetch — its
+ * blockers must reflect the account as it is right now, and a workspace that
+ * gained an admin a minute ago changes the answer.
+ *
+ * The dialog stays mounted while closed, so the previous open's plan is still in
+ * the cache and `isLoading` is false during that refetch. The dialog therefore
+ * holds its confirm on `isFetching`, not `isLoading`, until fresh data lands;
+ * `gcTime: 0` only evicts once the settings panel itself unmounts.
+ */
+export const ACCOUNT_DELETION_PLAN_STALE_TIME = 0
+
+async function fetchAccountDeletionPlan(signal?: AbortSignal): Promise<AccountDeletionPlan> {
+  const data = await requestJson(getAccountDeletionPlanContract, { signal })
+  return data.plan
+}
+
+export function useAccountDeletionPlan(enabled: boolean) {
+  return useQuery({
+    queryKey: accountDeletionKeys.plan(),
+    queryFn: ({ signal }) => fetchAccountDeletionPlan(signal),
+    enabled,
+    staleTime: ACCOUNT_DELETION_PLAN_STALE_TIME,
+    gcTime: 0,
+    retry: false,
+  })
+}
+
+/**
+ * Succeeds exactly once per account: the session that authorized it is gone by
+ * the time the response lands, so there is no cache left to invalidate. The
+ * caller is responsible for clearing local state and sending the user to sign-in.
+ */
+export function useDeleteAccount() {
+  return useMutation({
+    mutationFn: async (body: DeleteAccountBody) => {
+      await requestJson(deleteAccountContract, { body })
+    },
+  })
+}
@@ -413,3 +413,75 @@ export const subscriptionTransferContract = defineRouteContract({
     }),
   },
 })
+
+/** Every reason an account cannot be erased on its own, as rendered to its owner. */
+export const accountDeletionBlockerSchema = z.object({
+  code: z.enum([
+    'paid_organization_owner',
+    'organization_member',
+    'active_subscription',
+    'shared_workspace',
+    'organization_workspace',
+    'data_drain_owner',
+  ]),
+  /** A sentence naming both the obstacle and the way out. */
+  message: z.string(),
+})
+
+const accountDeletionResourceSchema = z.object({
+  id: z.string(),
+  name: z.string(),
+})
+
+export type AccountDeletionResource = z.output<typeof accountDeletionResourceSchema>
+
+export const accountDeletionPlanSchema = z.object({
+  blockers: z.array(accountDeletionBlockerSchema),
+  /** Workspaces nobody else can reach — erased along with the account. */
+  workspacesToDelete: z.array(accountDeletionResourceSchema),
+  /**
+   * Workspaces the account only anchors — it pays for them or is recorded as
+   * their owner while holding no access to them. The anchor moves to an admin
+   * who does; nothing inside changes hands.
+   */
+  workspacesToTransfer: z.array(accountDeletionResourceSchema),
+})
+
+export type AccountDeletionBlocker = z.output<typeof accountDeletionBlockerSchema>
+export type AccountDeletionPlan = z.output<typeof accountDeletionPlanSchema>
+
+export const getAccountDeletionPlanContract = defineRouteContract({
+  method: 'GET',
+  path: '/api/users/me/deletion',
+  response: {
+    mode: 'json',
+    schema: z.object({
+      plan: accountDeletionPlanSchema,
+    }),
+  },
+})
+
+export const deleteAccountBodySchema = z.object({
+  /**
+   * The account's own email address, retyped. Checked server-side against the
+   * session's account so a mis-wired client cannot delete anything else.
+   */
+  confirmEmail: z
+    .string({ error: 'Confirm your email address to delete your account' })
+    .min(1, 'Confirm your email address to delete your account')
+    .max(320, 'Email address is too long'),
+})
+
+export type DeleteAccountBody = z.input<typeof deleteAccountBodySchema>
+
+export const deleteAccountContract = defineRouteContract({
+  method: 'POST',
+  path: '/api/users/me/deletion',
+  body: deleteAccountBodySchema,
+  response: {
+    mode: 'json',
+    schema: z.object({
+      success: z.literal(true),
+    }),
+  },
+})