diff --git a/app/Jobs/GenerateClosingBalanceReportJob.php b/app/Jobs/GenerateClosingBalanceReportJob.php
index 5b620b9..03ad649 100644
--- a/app/Jobs/GenerateClosingBalanceReportJob.php
+++ b/app/Jobs/GenerateClosingBalanceReportJob.php
@@ -14,14 +14,15 @@ use Carbon\Carbon;
 use Exception;
 use Modules\Webstatement\Models\AccountBalance;
 use Modules\Webstatement\Models\ClosingBalanceReportLog;
+use Modules\Webstatement\Models\ProcessedClosingBalance;
 use Modules\Webstatement\Models\StmtEntry;
 use Modules\Webstatement\Models\StmtEntryDetail;
 use Modules\Webstatement\Models\TempFundsTransfer;
 use Modules\Webstatement\Models\DataCapture;
 
 /**
- * Job untuk generate laporan closing balance
- * Mengambil data transaksi dan menghitung closing balance
+ * Job untuk generate laporan closing balance dengan optimasi performa
+ * Menggunakan database staging sebelum export CSV
  */
 class GenerateClosingBalanceReportJob implements ShouldQueue
 {
@@ -36,10 +37,6 @@ class GenerateClosingBalanceReportJob implements ShouldQueue
 
     /**
      * Create a new job instance.
-     *
-     * @param string $accountNumber
-     * @param string $period
-     * @param int $reportLogId
      */
     public function __construct(string $accountNumber, string $period, int $reportLogId, string $groupName='DEFAULT')
     {
@@ -50,8 +47,7 @@ class GenerateClosingBalanceReportJob implements ShouldQueue
     }
 
     /**
-     * Execute the job.
-     * Memproses data transaksi dan generate laporan closing balance
+     * Execute the job dengan optimasi performa
      */
     public function handle(): void
     {
@@ -63,9 +59,10 @@ class GenerateClosingBalanceReportJob implements ShouldQueue
         }
 
         try {
-            Log::info('Starting closing balance report generation', [
+            Log::info('Starting optimized closing balance report generation', [
                 'account_number' => $this->accountNumber,
                 'period' => $this->period,
+                'group_name' => $this->groupName,
                 'report_log_id' => $this->reportLogId
             ]);
 
@@ -77,37 +74,37 @@ class GenerateClosingBalanceReportJob implements ShouldQueue
                 'updated_at' => now()
             ]);
 
-            // Get opening balance
-            $openingBalance = $this->getOpeningBalance();
+            // Step 1: Process and save to database (fast)
+            $this->processAndSaveClosingBalanceData();
 
-            // Generate report data
-            $reportData = $this->generateReportData($openingBalance);
+            // Step 2: Export from database to CSV (fast)
+            $filePath = $this->exportFromDatabaseToCsv();
 
-            // Export to CSV
-            $filePath = $this->exportToCsv($reportData);
+            // Get record count from database
+            $recordCount = $this->getProcessedRecordCount();
 
             // Update report log with success
             $reportLog->update([
                 'status' => 'completed',
                 'file_path' => $filePath,
                 'file_size' => Storage::disk($this->disk)->size($filePath),
-                'record_count' => count($reportData),
+                'record_count' => $recordCount,
                 'updated_at' => now()
             ]);
 
             DB::commit();
 
-            Log::info('Closing balance report generation completed successfully', [
+            Log::info('Optimized closing balance report generation completed successfully', [
                 'account_number' => $this->accountNumber,
                 'period' => $this->period,
                 'file_path' => $filePath,
-                'record_count' => count($reportData)
+                'record_count' => $recordCount
             ]);
 
         } catch (Exception $e) {
             DB::rollback();
 
-            Log::error('Error generating closing balance report', [
+            Log::error('Error generating optimized closing balance report', [
                 'account_number' => $this->accountNumber,
                 'period' => $this->period,
                 'error' => $e->getMessage(),
@@ -124,6 +121,251 @@ class GenerateClosingBalanceReportJob implements ShouldQueue
         }
     }
 
+    /**
+     * Process and save closing balance data to database
+     */
+    private function processAndSaveClosingBalanceData(): void
+    {
+        $criteria = [
+            'account_number' => $this->accountNumber,
+            'period' => $this->period,
+            'group_name' => $this->groupName
+        ];
+
+        // Delete existing processed data
+        $this->deleteExistingProcessedData($criteria);
+
+        // Get opening balance
+        $runningBalance = $this->getOpeningBalance();
+        $sequenceNo = 0;
+
+        Log::info('Starting to process and save closing balance data', [
+            'opening_balance' => $runningBalance,
+            'criteria' => $criteria
+        ]);
+
+        // Build query
+        $query = $this->buildTransactionQuery();
+
+        // Process in chunks and save to database
+        $query->chunk($this->chunkSize, function ($transactions) use (&$runningBalance, &$sequenceNo) {
+            $processedData = $this->prepareProcessedClosingBalanceData($transactions, $runningBalance, $sequenceNo);
+
+            if (!empty($processedData)) {
+                DB::table('processed_closing_balances')->insert($processedData);
+            }
+
+            Log::info('Chunk processed and saved to database', [
+                'chunk_size' => count($processedData),
+                'current_balance' => $runningBalance
+            ]);
+        });
+
+        Log::info('Closing balance data processing completed', [
+            'final_sequence' => $sequenceNo,
+            'final_balance' => $runningBalance
+        ]);
+    }
+
+    /**
+     * Delete existing processed data
+     */
+    private function deleteExistingProcessedData(array $criteria): void
+    {
+        ProcessedClosingBalance::where('account_number', $criteria['account_number'])
+            ->where('period', $criteria['period'])
+            ->where('group_name', $criteria['group_name'])
+            ->delete();
+    }
+
+    /**
+     * Prepare processed closing balance data for batch insert
+     */
+    private function prepareProcessedClosingBalanceData($transactions, &$runningBalance, &$sequenceNo): array
+    {
+        $processedData = [];
+
+        foreach ($transactions as $transaction) {
+            $sequenceNo++;
+
+            // Process transaction data
+            $processedTransactionData = $this->processTransactionData($transaction);
+
+            // Update running balance
+            $amount = (float) $transaction->amount_lcy;
+            $runningBalance += $amount;
+
+            // Format transaction date
+            $transactionDate = $this->formatDateTime($processedTransactionData['date_time']);
+
+            // Prepare data for database insert
+            $processedData[] = [
+                'account_number' => $this->accountNumber,
+                'period' => $this->period,
+                'group_name' => $this->groupName,
+                'sequence_no' => $sequenceNo,
+                'trans_reference' => $processedTransactionData['trans_reference'],
+                'booking_date' => $processedTransactionData['booking_date'],
+                'transaction_date' => $transactionDate,
+                'amount_lcy' => $processedTransactionData['amount_lcy'],
+                'debit_acct_no' => $processedTransactionData['debit_acct_no'],
+                'debit_value_date' => $processedTransactionData['debit_value_date'],
+                'debit_amount' => $processedTransactionData['debit_amount'],
+                'credit_acct_no' => $processedTransactionData['credit_acct_no'],
+                'bif_rcv_acct' => $processedTransactionData['bif_rcv_acct'],
+                'bif_rcv_name' => $processedTransactionData['bif_rcv_name'],
+                'credit_value_date' => $processedTransactionData['credit_value_date'],
+                'credit_amount' => $processedTransactionData['credit_amount'],
+                'at_unique_id' => $processedTransactionData['at_unique_id'],
+                'bif_ref_no' => $processedTransactionData['bif_ref_no'],
+                'atm_order_id' => $processedTransactionData['atm_order_id'],
+                'recipt_no' => $processedTransactionData['recipt_no'],
+                'api_iss_acct' => $processedTransactionData['api_iss_acct'],
+                'api_benff_acct' => $processedTransactionData['api_benff_acct'],
+                'authoriser' => $processedTransactionData['authoriser'],
+                'remarks' => $processedTransactionData['remarks'],
+                'payment_details' => $processedTransactionData['payment_details'],
+                'ref_no' => $processedTransactionData['ref_no'],
+                'merchant_id' => $processedTransactionData['merchant_id'],
+                'term_id' => $processedTransactionData['term_id'],
+                'closing_balance' => $runningBalance,
+                'created_at' => now(),
+                'updated_at' => now()
+            ];
+        }
+
+        return $processedData;
+    }
+
+    /**
+     * Export from database to CSV (very fast)
+     */
+    private function exportFromDatabaseToCsv(): string
+    {
+        Log::info('Starting CSV export from database for closing balance report', [
+            'account_number' => $this->accountNumber,
+            'period' => $this->period,
+            'group_name' => $this->groupName
+        ]);
+
+        // Create directory structure
+        $basePath = "closing_balance_reports";
+        $accountPath = "{$basePath}/{$this->accountNumber}";
+
+        Storage::disk($this->disk)->makeDirectory($basePath);
+        Storage::disk($this->disk)->makeDirectory($accountPath);
+
+        // Generate filename
+        $fileName = "closing_balance_{$this->accountNumber}_{$this->period}_{$this->groupName}.csv";
+        $filePath = "{$accountPath}/{$fileName}";
+
+        // Delete existing file if exists
+        if (Storage::disk($this->disk)->exists($filePath)) {
+            Storage::disk($this->disk)->delete($filePath);
+        }
+
+        // Create CSV header
+        $csvHeader = [
+            'NO',
+            'TRANS_REFERENCE',
+            'BOOKING_DATE',
+            'TRANSACTION_DATE',
+            'AMOUNT_LCY',
+            'DEBIT_ACCT_NO',
+            'DEBIT_VALUE_DATE',
+            'DEBIT_AMOUNT',
+            'CREDIT_ACCT_NO',
+            'BIF_RCV_ACCT',
+            'BIF_RCV_NAME',
+            'CREDIT_VALUE_DATE',
+            'CREDIT_AMOUNT',
+            'AT_UNIQUE_ID',
+            'BIF_REF_NO',
+            'ATM_ORDER_ID',
+            'RECIPT_NO',
+            'API_ISS_ACCT',
+            'API_BENFF_ACCT',
+            'AUTHORISER',
+            'REMARKS',
+            'PAYMENT_DETAILS',
+            'REF_NO',
+            'MERCHANT_ID',
+            'TERM_ID',
+            'CLOSING_BALANCE'
+        ];
+
+        $csvContent = implode('|', $csvHeader) . "\n";
+        Storage::disk($this->disk)->put($filePath, $csvContent);
+
+        // Export data from database in chunks
+        ProcessedClosingBalance::where('account_number', $this->accountNumber)
+            ->where('period', $this->period)
+            ->where('group_name', $this->groupName)
+            ->orderBy('sequence_no')
+            ->chunk($this->chunkSize, function ($records) use ($filePath) {
+                $csvContent = '';
+                foreach ($records as $record) {
+                    $csvRow = [
+                        $record->sequence_no,
+                        $record->trans_reference ?? '',
+                        $record->booking_date ?? '',
+                        $record->transaction_date ?? '',
+                        $record->amount_lcy ?? '',
+                        $record->debit_acct_no ?? '',
+                        $record->debit_value_date ?? '',
+                        $record->debit_amount ?? '',
+                        $record->credit_acct_no ?? '',
+                        $record->bif_rcv_acct ?? '',
+                        $record->bif_rcv_name ?? '',
+                        $record->credit_value_date ?? '',
+                        $record->credit_amount ?? '',
+                        $record->at_unique_id ?? '',
+                        $record->bif_ref_no ?? '',
+                        $record->atm_order_id ?? '',
+                        $record->recipt_no ?? '',
+                        $record->api_iss_acct ?? '',
+                        $record->api_benff_acct ?? '',
+                        $record->authoriser ?? '',
+                        $record->remarks ?? '',
+                        $record->payment_details ?? '',
+                        $record->ref_no ?? '',
+                        $record->merchant_id ?? '',
+                        $record->term_id ?? '',
+                        $record->closing_balance ?? ''
+                    ];
+
+                    $csvContent .= implode('|', $csvRow) . "\n";
+                }
+
+                if (!empty($csvContent)) {
+                    Storage::disk($this->disk)->append($filePath, $csvContent);
+                }
+            });
+
+        // Verify file creation
+        if (!Storage::disk($this->disk)->exists($filePath)) {
+            throw new Exception("Failed to create CSV file: {$filePath}");
+        }
+
+        Log::info('CSV export from database completed successfully', [
+            'file_path' => $filePath,
+            'file_size' => Storage::disk($this->disk)->size($filePath)
+        ]);
+
+        return $filePath;
+    }
+
+    /**
+     * Get processed record count
+     */
+    private function getProcessedRecordCount(): int
+    {
+        return ProcessedClosingBalance::where('account_number', $this->accountNumber)
+            ->where('period', $this->period)
+            ->where('group_name', $this->groupName)
+            ->count();
+    }
+
     /**
      * Get opening balance from account balance table
      * Mengambil saldo awal dari tabel account balance
diff --git a/database/migrations/2025_07_30_100613_create_processed_closing_balances_table.php b/database/migrations/2025_07_30_100613_create_processed_closing_balances_table.php
new file mode 100644
index 0000000..637b6e0
--- /dev/null
+++ b/database/migrations/2025_07_30_100613_create_processed_closing_balances_table.php
@@ -0,0 +1,54 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up()
+    {
+        Schema::create('processed_closing_balances', function (Blueprint $table) {
+            $table->id();
+            $table->string('account_number', 20)->index();
+            $table->string('period', 8)->index();
+            $table->string('group_name', 20)->default('DEFAULT')->index();
+            $table->integer('sequence_no');
+            $table->string('trans_reference', 50)->nullable();
+            $table->string('booking_date', 8)->nullable();
+            $table->string('transaction_date', 20)->nullable();
+            $table->decimal('amount_lcy', 15, 2)->nullable();
+            $table->string('debit_acct_no', 20)->nullable();
+            $table->string('debit_value_date', 8)->nullable();
+            $table->decimal('debit_amount', 15, 2)->nullable();
+            $table->string('credit_acct_no', 20)->nullable();
+            $table->string('bif_rcv_acct', 20)->nullable();
+            $table->string('bif_rcv_name', 100)->nullable();
+            $table->string('credit_value_date', 8)->nullable();
+            $table->decimal('credit_amount', 15, 2)->nullable();
+            $table->string('at_unique_id', 50)->nullable();
+            $table->string('bif_ref_no', 50)->nullable();
+            $table->string('atm_order_id', 50)->nullable();
+            $table->string('recipt_no', 50)->nullable();
+            $table->string('api_iss_acct', 20)->nullable();
+            $table->string('api_benff_acct', 20)->nullable();
+            $table->string('authoriser', 50)->nullable();
+            $table->text('remarks')->nullable();
+            $table->text('payment_details')->nullable();
+            $table->string('ref_no', 50)->nullable();
+            $table->string('merchant_id', 50)->nullable();
+            $table->string('term_id', 50)->nullable();
+            $table->decimal('closing_balance', 15, 2)->nullable();
+            $table->timestamps();
+
+            // Composite index untuk performa query
+            $table->index(['account_number', 'period', 'group_name']);
+            $table->index(['account_number', 'period', 'sequence_no']);
+        });
+    }
+
+    public function down()
+    {
+        Schema::dropIfExists('processed_closing_balances');
+    }
+};