diff --git a/app/Console/Commands/UpdateLatestClientInvoicePaymentItemSpending.php b/app/Console/Commands/UpdateLatestClientInvoicePaymentItemSpending.php
index c05236b..a4f1889 100644
--- a/app/Console/Commands/UpdateLatestClientInvoicePaymentItemSpending.php
+++ b/app/Console/Commands/UpdateLatestClientInvoicePaymentItemSpending.php
@@ -14,7 +14,7 @@ class UpdateLatestClientInvoicePaymentItemSpending extends Command
     protected $signature = 'customer:update-latest-invoice-item-spending
         {--dry-run : Calculate without saving changes}';
 
-    protected $description = 'Update spending on each client\'s latest billing type 1 invoice payment item.';
+    protected $description = 'Update spending on all billing type 1 invoice payment items.';
 
     public function handle(GoogleAdsSpendService $spendService): int
     {
@@ -36,66 +36,76 @@ public function handle(GoogleAdsSpendService $spendService): int
                 &$failed,
             ) {
                 foreach ($clients as $client) {
-                    $item = ClientInvoicePaymentItem::query()
+                    if (empty($client->customer_id)) {
+                        $skipped++;
+                        $this->warn("Skipping client {$client->id}: missing customer ID.");
+
+                        continue;
+                    }
+
+                    ClientInvoicePaymentItem::query()
                         ->whereHas(
                             'payment.invoice',
                             fn (Builder $query) => $query->where('client_id', $client->id),
                         )
                         ->where(fn (Builder $query) => $this->eligibleItems($query))
-                        ->latest('id')
-                        ->first();
+                        ->orderBy('id')
+                        ->chunkById(50, function ($items) use (
+                            $client,
+                            $spendService,
+                            $dryRun,
+                            $today,
+                            &$updated,
+                            &$skipped,
+                            &$failed,
+                        ) {
+                            foreach ($items as $item) {
+                                $startDate = $item->start_date->format('Y-m-d');
+                                $endDate = $item->end_date?->format('Y-m-d') ?? $today;
 
-                    if ($item === null || empty($client->customer_id)) {
-                        $skipped++;
-                        $this->warn("Skipping client {$client->id}: missing eligible item/customer ID.");
+                                if ($endDate < $startDate) {
+                                    $skipped++;
+                                    $this->warn("Skipping item {$item->id}: end date is before start date.");
 
-                        continue;
-                    }
+                                    continue;
+                                }
 
-                    $startDate = $item->start_date->format('Y-m-d');
-                    $endDate = $item->end_date?->format('Y-m-d') ?? $today;
+                                try {
+                                    $spending = $spendService->forDateRange(
+                                        $client->customer_id,
+                                        $startDate,
+                                        $endDate,
+                                    );
 
-                    if ($endDate < $startDate) {
-                        $skipped++;
-                        $this->warn("Skipping item {$item->id}: end date is before start date.");
+                                    if (! $dryRun) {
+                                        $item->forceFill(['spending' => $spending])->save();
+                                    }
 
-                        continue;
-                    }
+                                    $updated++;
+                                    $this->line(sprintf(
+                                        '%s client %d item %d: RM %.2f (%s to %s)',
+                                        $dryRun ? 'Calculated' : 'Updated',
+                                        $client->id,
+                                        $item->id,
+                                        $spending,
+                                        $startDate,
+                                        $endDate,
+                                    ));
+                                } catch (\Throwable $exception) {
+                                    $failed++;
+                                    Log::error('Unable to update invoice payment item spending.', [
+                                        'client_id' => $client->id,
+                                        'client_invoice_payment_item_id' => $item->id,
+                                        'customer_id' => $client->customer_id,
+                                        'start_date' => $startDate,
+                                        'end_date' => $endDate,
+                                        'message' => $exception->getMessage(),
+                                    ]);
 
-                    try {
-                        $spending = $spendService->forDateRange(
-                            $client->customer_id,
-                            $startDate,
-                            $endDate,
-                        );
-
-                        if (! $dryRun) {
-                            $item->forceFill(['spending' => $spending])->save();
-                        }
-
-                        $updated++;
-                        $this->line(sprintf(
-                            '%s client %d item %d: RM %.2f (%s to %s)',
-                            $dryRun ? 'Calculated' : 'Updated',
-                            $client->id,
-                            $item->id,
-                            $spending,
-                            $startDate,
-                            $endDate,
-                        ));
-                    } catch (\Throwable $exception) {
-                        $failed++;
-                        Log::error('Unable to update latest invoice payment item spending.', [
-                            'client_id' => $client->id,
-                            'client_invoice_payment_item_id' => $item->id,
-                            'customer_id' => $client->customer_id,
-                            'start_date' => $startDate,
-                            'end_date' => $endDate,
-                            'message' => $exception->getMessage(),
-                        ]);
-
-                        $this->error("Failed item {$item->id}: {$exception->getMessage()}");
-                    }
+                                    $this->error("Failed item {$item->id}: {$exception->getMessage()}");
+                                }
+                            }
+                        });
                 }
             });
 
diff --git a/tests/Feature/UpdateLatestClientInvoicePaymentItemSpendingTest.php b/tests/Feature/UpdateLatestClientInvoicePaymentItemSpendingTest.php
index 7f8c074..f3effd1 100644
--- a/tests/Feature/UpdateLatestClientInvoicePaymentItemSpendingTest.php
+++ b/tests/Feature/UpdateLatestClientInvoicePaymentItemSpendingTest.php
@@ -33,7 +33,7 @@ function createInvoiceItem(
     ]);
 }
 
-test('it updates only the latest eligible invoice payment item for each client', function () {
+test('it updates every eligible invoice payment item for each client', function () {
     Carbon::setTestNow('2026-06-25 10:00:00');
 
     BillingItemType::query()->insert([
@@ -59,9 +59,17 @@ function createInvoiceItem(
 
     $adsService = Mockery::mock(GoogleAdsService::class);
     $adsService->shouldReceive('listCampaigns')
-        ->once()
+        ->twice()
         ->with('1111111111')
         ->andReturn([['id' => 101], ['id' => 102]]);
+    $adsService->shouldReceive('listCampaignsMetricsById')
+        ->once()
+        ->with('1111111111', '101', '2026-05-01', '2026-05-31')
+        ->andReturn([['actual_spend' => 3.25]]);
+    $adsService->shouldReceive('listCampaignsMetricsById')
+        ->once()
+        ->with('1111111111', '102', '2026-05-01', '2026-05-31')
+        ->andReturn([['actual_spend' => 4.75]]);
     $adsService->shouldReceive('listCampaignsMetricsById')
         ->once()
         ->with('1111111111', '101', '2026-06-01', '2026-06-25')
@@ -82,10 +90,10 @@ function createInvoiceItem(
     app()->instance(GoogleAdsService::class, $adsService);
 
     $this->artisan('customer:update-latest-invoice-item-spending')
-        ->expectsOutputToContain('Done. 2 calculated, 0 skipped, 0 failed.')
+        ->expectsOutputToContain('Done. 3 calculated, 0 skipped, 0 failed.')
         ->assertSuccessful();
 
-    expect((float) $olderItem->fresh()->spending)->toBe(10.0)
+    expect((float) $olderItem->fresh()->spending)->toBe(8.0)
         ->and((float) $latestItem->fresh()->spending)->toBe(20.0)
         ->and((float) $otherTypeItem->fresh()->spending)->toBe(20.0)
         ->and((float) $secondClientItem->fresh()->spending)->toBe(5.5);