diff --git a/app/Http/Controllers/OnboardingController.php b/app/Http/Controllers/OnboardingController.php
index 6b11ef5f..7bb3a62a 100644
--- a/app/Http/Controllers/OnboardingController.php
+++ b/app/Http/Controllers/OnboardingController.php
@@ -3,6 +3,7 @@
 namespace App\Http\Controllers;
 
 use App\Enums\BankingConnectionStatus;
+use App\Jobs\CategorizeOnboardingTransactionsJob;
 use App\Models\Bank;
 use App\Models\Category;
 use App\Models\Transaction;
@@ -87,10 +88,14 @@ class OnboardingController extends Controller
 
     public function complete(Request $request): RedirectResponse
     {
-        $request->user()->update([
+        $user = $request->user();
+
+        $user->update([
             'onboarded_at' => now(),
         ]);
 
+        CategorizeOnboardingTransactionsJob::dispatch($user);
+
         return redirect()->route('dashboard');
     }
 }
diff --git a/app/Jobs/CategorizeOnboardingTransactionsJob.php b/app/Jobs/CategorizeOnboardingTransactionsJob.php
new file mode 100644
index 00000000..1035a261
--- /dev/null
+++ b/app/Jobs/CategorizeOnboardingTransactionsJob.php
@@ -0,0 +1,63 @@
+<?php
+
+namespace App\Jobs;
+
+use App\Models\Transaction;
+use App\Models\User;
+use App\Services\Ai\AiCategorizationGate;
+use App\Services\Ai\AiCategorizer;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Database\Eloquent\Collection;
+use Illuminate\Foundation\Queue\Queueable;
+
+/**
+ * One-shot AI categorization of everything still uncategorized when onboarding
+ * completes. The per-transaction listener is skipped during onboarding, so the
+ * AI rules generated in the suggestions step get first crack at the import (they
+ * cover the bulk of it); this pass then labels whatever the rules left blank.
+ *
+ * Runs on the dedicated AI queue so it never delays the rest of the app.
+ */
+class CategorizeOnboardingTransactionsJob implements ShouldQueue
+{
+    use Queueable;
+
+    /**
+     * A fresh import can span many model calls, so give the batch plenty of room.
+     */
+    public int $timeout = 300;
+
+    public function __construct(public User $user) {}
+
+    public function viaQueue(): string
+    {
+        return (string) config('ai_categorization.queue');
+    }
+
+    public function handle(AiCategorizationGate $gate, AiCategorizer $categorizer): void
+    {
+        if (! $gate->allows($this->user)) {
+            return;
+        }
+
+        $pendingIds = Transaction::query()
+            ->where('user_id', $this->user->id)
+            ->whereNull('category_id')
+            ->whereNull('description_iv')
+            ->pluck('id');
+
+        if ($pendingIds->isEmpty()) {
+            return;
+        }
+
+        $batchSize = max(1, (int) config('ai_categorization.group_batch_size'));
+
+        // Chunk a fixed snapshot of ids so transactions left blank (below the
+        // confidence bar) are never re-processed on a later iteration.
+        foreach ($pendingIds->chunk($batchSize) as $chunkIds) {
+            $chunk = Transaction::query()->whereIn('id', $chunkIds->all())->get();
+
+            $categorizer->run($this->user, new Collection($chunk->all()));
+        }
+    }
+}
diff --git a/app/Listeners/CategorizeTransactionWithAi.php b/app/Listeners/CategorizeTransactionWithAi.php
index ef6fd667..7fa872d8 100644
--- a/app/Listeners/CategorizeTransactionWithAi.php
+++ b/app/Listeners/CategorizeTransactionWithAi.php
@@ -45,7 +45,19 @@ class CategorizeTransactionWithAi implements ShouldQueue
 
         $user = $transaction->user;
 
-        if ($user === null || ! $this->gate->allows($user)) {
+        if ($user === null) {
+            return;
+        }
+
+        // Transactions imported during onboarding are deliberately skipped here:
+        // the bulk of them are covered by the AI automation rules generated at the
+        // end of onboarding, and whatever is left is categorized in a single batch
+        // pass once onboarding completes (CategorizeOnboardingTransactionsJob).
+        if (! $user->isOnboarded()) {
+            return;
+        }
+
+        if (! $this->gate->allows($user)) {
             return;
         }
 
diff --git a/tests/Feature/Ai/CategorizeOnboardingTransactionsJobTest.php b/tests/Feature/Ai/CategorizeOnboardingTransactionsJobTest.php
new file mode 100644
index 00000000..2304aaa9
--- /dev/null
+++ b/tests/Feature/Ai/CategorizeOnboardingTransactionsJobTest.php
@@ -0,0 +1,117 @@
+<?php
+
+use App\Ai\Agents\TransactionCategorizationAgent;
+use App\Enums\CategoryCashflowDirection;
+use App\Enums\CategorySource;
+use App\Enums\CategoryType;
+use App\Features\AiCategorization;
+use App\Jobs\CategorizeOnboardingTransactionsJob;
+use App\Models\Category;
+use App\Models\Transaction;
+use App\Models\User;
+use App\Services\Ai\CategoryCatalog;
+use Laravel\Pennant\Feature;
+
+function eligibleOnboardedUser(): User
+{
+    $user = User::factory()->onboarded()->create();
+    $user->recordAiConsent();
+    Feature::for($user)->activate(AiCategorization::class);
+
+    return $user;
+}
+
+function leafIndexFor(CategoryCatalog $catalog, string $categoryId): int
+{
+    $index = 0;
+
+    while (($id = $catalog->categoryIdForIndex($index)) !== null) {
+        if ($id === $categoryId) {
+            return $index;
+        }
+        $index++;
+    }
+
+    throw new RuntimeException("category {$categoryId} is not a leaf in the catalog");
+}
+
+function expenseLeaf(User $user): Category
+{
+    return Category::factory()->for($user)->create([
+        'type' => CategoryType::Expense,
+        'cashflow_direction' => CategoryCashflowDirection::Outflow,
+    ]);
+}
+
+function fakeCategorizesEachRef(int $index): void
+{
+    TransactionCategorizationAgent::fake(function (string $prompt) use ($index): array {
+        preg_match_all('/"ref":"([0-9a-f-]+)"/', $prompt, $matches);
+
+        return ['results' => array_map(fn (string $ref): array => [
+            'ref' => $ref,
+            'category_index' => $index,
+            'confidence' => 0.95,
+            'merchant_unambiguous' => false,
+        ], $matches[1])];
+    });
+}
+
+function runOnboardingCategorization(User $user): void
+{
+    app()->call([new CategorizeOnboardingTransactionsJob($user), 'handle']);
+}
+
+it('categorizes the remaining uncategorized transactions when onboarding completes', function () {
+    $user = eligibleOnboardedUser();
+    $category = expenseLeaf($user);
+    $index = leafIndexFor(CategoryCatalog::forUser($user), $category->id);
+
+    fakeCategorizesEachRef($index);
+
+    $pending = Transaction::factory()->plaintext()->count(3)->create([
+        'user_id' => $user->id,
+        'category_id' => null,
+        'creditor_name' => 'mercadona',
+    ]);
+
+    runOnboardingCategorization($user);
+
+    foreach ($pending as $transaction) {
+        expect($transaction->refresh()->category_id)->toBe($category->id)
+            ->and($transaction->category_source)->toBe(CategorySource::Ai);
+    }
+});
+
+it('leaves transactions already categorized by rules untouched', function () {
+    $user = eligibleOnboardedUser();
+    $category = expenseLeaf($user);
+    $index = leafIndexFor(CategoryCatalog::forUser($user), $category->id);
+
+    fakeCategorizesEachRef($index);
+
+    $alreadyCategorized = Transaction::factory()->plaintext()->create([
+        'user_id' => $user->id,
+        'category_id' => $category->id,
+        'category_source' => CategorySource::Rule,
+    ]);
+
+    runOnboardingCategorization($user);
+
+    expect($alreadyCategorized->refresh()->category_source)->toBe(CategorySource::Rule);
+});
+
+it('does nothing for a user who is not eligible', function () {
+    $user = User::factory()->onboarded()->create();
+    expenseLeaf($user);
+
+    $transaction = Transaction::factory()->plaintext()->create([
+        'user_id' => $user->id,
+        'category_id' => null,
+        'creditor_name' => 'mercadona',
+    ]);
+
+    runOnboardingCategorization($user);
+
+    expect($transaction->refresh()->category_id)->toBeNull();
+});
diff --git a/tests/Feature/Ai/CategorizeTransactionWithAiTest.php b/tests/Feature/Ai/CategorizeTransactionWithAiTest.php
index 2419acdf..f93c1c43 100644
--- a/tests/Feature/Ai/CategorizeTransactionWithAiTest.php
+++ b/tests/Feature/Ai/CategorizeTransactionWithAiTest.php
@@ -13,7 +13,7 @@ use Laravel\Pennant\Feature;
 
 function eligible(): User
 {
-    $user = User::factory()->create();
+    $user = User::factory()->onboarded()->create();
     $user->recordAiConsent();
     Feature::for($user)->activate(AiCategorization::class);
 
@@ -87,6 +87,21 @@ it('does nothing when the user is not eligible', function () {
     expect($transaction->refresh()->category_id)->toBeNull();
 });
 
+it('does not categorize transactions created while onboarding', function () {
+    $user = eligible();
+    $user->update(['onboarded_at' => null]);
+    leaf($user);
+
+    $transaction = Transaction::factory()->plaintext()->create([
+        'user_id' => $user->id,
+        'category_id' => null,
+        'amount' => -4300,
+        'creditor_name' => 'mercadona',
+    ]);
+
+    expect($transaction->refresh()->category_id)->toBeNull();
+});
+
 it('does not categorize a transaction that already has a category', function () {
     $user = eligible();
     $category = leaf($user);
diff --git a/tests/Feature/Onboarding/OnboardingControllerTest.php b/tests/Feature/Onboarding/OnboardingControllerTest.php
index 255b0159..a2521d2d 100644
--- a/tests/Feature/Onboarding/OnboardingControllerTest.php
+++ b/tests/Feature/Onboarding/OnboardingControllerTest.php
@@ -1,10 +1,12 @@
 <?php
 
+use App\Jobs\CategorizeOnboardingTransactionsJob;
 use App\Models\Account;
 use App\Models\Bank;
 use App\Models\Category;
 use App\Models\Transaction;
 use App\Models\User;
+use Illuminate\Support\Facades\Queue;
 
 it('returns categories and transactions props on onboarding index', function () {
     $user = User::factory()->create(['onboarded_at' => null]);
@@ -104,6 +106,23 @@ it('ignores an unknown step and falls back to the default flow', function () {
         );
 });
 
+it('marks the user onboarded and queues the AI categorization batch on complete', function () {
+    Queue::fake();
+
+    $user = User::factory()->create(['onboarded_at' => null]);
+
+    $this->actingAs($user)
+        ->post('/onboarding/complete')
+        ->assertRedirect(route('dashboard'));
+
+    expect($user->refresh()->onboarded_at)->not->toBeNull();
+
+    Queue::assertPushed(
+        CategorizeOnboardingTransactionsJob::class,
+        fn (CategorizeOnboardingTransactionsJob $job): bool => $job->user->is($user),
+    );
+});
+
 it('returns banks and accounts props on onboarding index', function () {
     $user = User::factory()->create(['onboarded_at' => null]);
     $globalBank = Bank::factory()->create(['user_id' => null]);