diff --git a/app/Http/Controllers/App/BillController.php b/app/Http/Controllers/App/BillController.php
index 70d0968..45cdf5a 100644
--- a/app/Http/Controllers/App/BillController.php
+++ b/app/Http/Controllers/App/BillController.php
@@ -20,7 +20,7 @@ class BillController extends Controller
      */
     public function index()
     {
-        $query = Bill::query();
+        $query = Bill::query()->with('supplier');
 
         if (request()->filled('q')) {
             $query->where('name', 'like', '%' . request()->q . '%');
@@ -108,7 +108,7 @@ public function togglePaid(Bill $bill)
      */
     public function export()
     {
-        $bills = Bill::where('paid', false)
+        $bills = Bill::with('supplier')->where('paid', false)
             ->orderBy('deadline')
             ->orderBy('created_at')
             ->get();
@@ -132,14 +132,14 @@ public function export()
         ];
 
         // Título
-        $sheet->mergeCells('A1:E1');
+        $sheet->mergeCells('A1:F1');
         $sheet->setCellValue('A1', 'FACTURAS PENDIENTES DE PAGO');
         $sheet->getStyle('A1')->applyFromArray([
             'font'      => ['bold' => true, 'size' => 14],
             'alignment' => ['horizontal' => Alignment::HORIZONTAL_CENTER],
         ]);
 
-        $sheet->mergeCells('A2:E2');
+        $sheet->mergeCells('A2:F2');
         $sheet->setCellValue('A2', 'Generado el ' . Carbon::now()->format('d/m/Y H:i'));
         $sheet->getStyle('A2')->applyFromArray([
             'font'      => ['italic' => true, 'color' => ['rgb' => '666666']],
@@ -147,11 +147,11 @@ public function export()
         ]);
 
         // Encabezados
-        $headers = ['A4' => '#', 'B4' => 'NOMBRE', 'C4' => 'COSTO', 'D4' => 'FECHA LÍMITE', 'E4' => 'DÍAS RESTANTES'];
+        $headers = ['A4' => '#', 'B4' => 'NOMBRE', 'C4' => 'PROVEEDOR', 'D4' => 'COSTO', 'E4' => 'FECHA LÍMITE', 'F4' => 'DÍAS RESTANTES'];
         foreach ($headers as $cell => $text) {
             $sheet->setCellValue($cell, $text);
         }
-        $sheet->getStyle('A4:E4')->applyFromArray($styleHeader);
+        $sheet->getStyle('A4:F4')->applyFromArray($styleHeader);
         $sheet->getRowDimension(4)->setRowHeight(22);
 
         // Datos
@@ -174,26 +174,27 @@ public function export()
 
             $sheet->setCellValue('A' . $row, $i + 1);
             $sheet->setCellValue('B' . $row, $bill->name);
-            $sheet->setCellValue('C' . $row, (float) $bill->cost);
-            $sheet->setCellValue('D' . $row, $deadline?->format('d/m/Y') ?? '—');
-            $sheet->setCellValue('E' . $row, $daysLabel);
+            $sheet->setCellValue('C' . $row, $bill->supplier?->business_name ?? '—');
+            $sheet->setCellValue('D' . $row, (float) $bill->cost);
+            $sheet->setCellValue('E' . $row, $deadline?->format('d/m/Y') ?? '—');
+            $sheet->setCellValue('F' . $row, $daysLabel);
 
-            $sheet->getStyle('C' . $row)->getNumberFormat()->setFormatCode('$#,##0.00');
-            $sheet->getStyle('A' . $row . ':E' . $row)->applyFromArray($styleData);
+            $sheet->getStyle('D' . $row)->getNumberFormat()->setFormatCode('$#,##0.00');
+            $sheet->getStyle('A' . $row . ':F' . $row)->applyFromArray($styleData);
             $sheet->getStyle('A' . $row)->getAlignment()->setHorizontal(Alignment::HORIZONTAL_CENTER);
-            $sheet->getStyle('C' . $row)->getAlignment()->setHorizontal(Alignment::HORIZONTAL_RIGHT);
-            $sheet->getStyle('D' . $row)->getAlignment()->setHorizontal(Alignment::HORIZONTAL_CENTER);
+            $sheet->getStyle('D' . $row)->getAlignment()->setHorizontal(Alignment::HORIZONTAL_RIGHT);
             $sheet->getStyle('E' . $row)->getAlignment()->setHorizontal(Alignment::HORIZONTAL_CENTER);
+            $sheet->getStyle('F' . $row)->getAlignment()->setHorizontal(Alignment::HORIZONTAL_CENTER);
 
             // Verde si quedan días, rojo si está vencida
             if ($daysLeft !== null && $daysLeft > 0) {
-                $sheet->getStyle('E' . $row)->getFont()->getColor()->setRGB('1A7A1A');
+                $sheet->getStyle('F' . $row)->getFont()->getColor()->setRGB('1A7A1A');
             } elseif ($daysLeft !== null && $daysLeft < 0) {
-                $sheet->getStyle('D' . $row . ':E' . $row)->getFont()->getColor()->setRGB('CC0000');
-                $sheet->getStyle('D' . $row . ':E' . $row)->getFont()->setBold(true);
+                $sheet->getStyle('E' . $row . ':F' . $row)->getFont()->getColor()->setRGB('CC0000');
+                $sheet->getStyle('E' . $row . ':F' . $row)->getFont()->setBold(true);
             } elseif ($daysLeft === 0) {
-                $sheet->getStyle('E' . $row)->getFont()->getColor()->setRGB('B45309');
-                $sheet->getStyle('E' . $row)->getFont()->setBold(true);
+                $sheet->getStyle('F' . $row)->getFont()->getColor()->setRGB('B45309');
+                $sheet->getStyle('F' . $row)->getFont()->setBold(true);
             }
 
             $total += (float) $bill->cost;
@@ -201,10 +202,10 @@ public function export()
         }
 
         // Total
-        $sheet->setCellValue('B' . $row, 'TOTAL PENDIENTE');
-        $sheet->setCellValue('C' . $row, $total);
-        $sheet->getStyle('C' . $row)->getNumberFormat()->setFormatCode('$#,##0.00');
-        $sheet->getStyle('B' . $row . ':C' . $row)->applyFromArray([
+        $sheet->setCellValue('C' . $row, 'TOTAL PENDIENTE');
+        $sheet->setCellValue('D' . $row, $total);
+        $sheet->getStyle('D' . $row)->getNumberFormat()->setFormatCode('$#,##0.00');
+        $sheet->getStyle('C' . $row . ':D' . $row)->applyFromArray([
             'font'      => ['bold' => true, 'size' => 11],
             'fill'      => ['fillType' => Fill::FILL_SOLID, 'startColor' => ['rgb' => 'FFF2CC']],
             'borders'   => ['allBorders' => ['borderStyle' => Border::BORDER_THIN]],
@@ -213,10 +214,11 @@ public function export()
 
         // Anchos de columna
         $sheet->getColumnDimension('A')->setWidth(6);
-        $sheet->getColumnDimension('B')->setWidth(40);
-        $sheet->getColumnDimension('C')->setWidth(18);
-        $sheet->getColumnDimension('D')->setWidth(16);
+        $sheet->getColumnDimension('B')->setWidth(36);
+        $sheet->getColumnDimension('C')->setWidth(30);
+        $sheet->getColumnDimension('D')->setWidth(18);
         $sheet->getColumnDimension('E')->setWidth(16);
+        $sheet->getColumnDimension('F')->setWidth(16);
 
         // Generar archivo
         $fileName = 'Facturas_Pendientes_' . Carbon::now()->format('Ymd_His') . '.xlsx';
diff --git a/app/Http/Requests/App/BillStoreRequest.php b/app/Http/Requests/App/BillStoreRequest.php
index cf4ce3c..a2e26ff 100644
--- a/app/Http/Requests/App/BillStoreRequest.php
+++ b/app/Http/Requests/App/BillStoreRequest.php
@@ -20,11 +20,12 @@ public function authorize(): bool
     public function rules(): array
     {
         return [
-            'name'     => ['required', 'string', 'max:255'],
-            'cost'     => ['required', 'numeric', 'min:0'],
-            'deadline' => ['nullable', 'date'],
-            'paid'     => ['boolean'],
-            'file'     => ['nullable', 'file', 'mimes:pdf,jpg,jpeg,png', 'max:10240'],
+            'name'        => ['required', 'string', 'max:255'],
+            'supplier_id' => ['nullable', 'exists:suppliers,id'],
+            'cost'        => ['required', 'numeric', 'min:0'],
+            'deadline'    => ['nullable', 'date'],
+            'paid'        => ['boolean'],
+            'file'        => ['nullable', 'file', 'mimes:pdf,jpg,jpeg,png', 'max:10240'],
         ];
     }
 
@@ -35,6 +36,7 @@ public function messages(): array
     {
         return [
             'name.required' => 'El nombre de la factura es obligatorio.',
+            'supplier_id.exists' => 'El proveedor seleccionado no es válido.',
             'cost.required' => 'El costo es obligatorio.',
             'cost.numeric' => 'El costo debe ser un número válido.',
             'cost.min' => 'El costo debe ser un valor positivo.',
diff --git a/app/Http/Requests/App/BillUpdateRequest.php b/app/Http/Requests/App/BillUpdateRequest.php
index d60a88d..147a2b6 100644
--- a/app/Http/Requests/App/BillUpdateRequest.php
+++ b/app/Http/Requests/App/BillUpdateRequest.php
@@ -20,11 +20,12 @@ public function authorize(): bool
     public function rules(): array
     {
         return [
-            'name'     => ['required', 'string', 'max:255'],
-            'cost'     => ['required', 'numeric', 'min:0'],
-            'deadline' => ['nullable', 'date'],
-            'paid'     => ['boolean'],
-            'file'     => ['sometimes', 'nullable', 'file', 'mimes:pdf,jpg,jpeg,png', 'max:10240'],
+            'name'        => ['required', 'string', 'max:255'],
+            'supplier_id' => ['nullable', 'exists:suppliers,id'],
+            'cost'        => ['required', 'numeric', 'min:0'],
+            'deadline'    => ['nullable', 'date'],
+            'paid'        => ['boolean'],
+            'file'        => ['sometimes', 'nullable', 'file', 'mimes:pdf,jpg,jpeg,png', 'max:10240'],
         ];
     }
 
@@ -35,6 +36,7 @@ public function messages(): array
     {
         return [
             'name.required' => 'El nombre de la factura es obligatorio.',
+            'supplier_id.exists' => 'El proveedor seleccionado no es válido.',
             'cost.required' => 'El costo es obligatorio.',
             'cost.numeric' => 'El costo debe ser un número válido.',
             'cost.min' => 'El costo debe ser un valor positivo.',
diff --git a/app/Models/Bill.php b/app/Models/Bill.php
index 4e1f6e3..cd6a620 100644
--- a/app/Models/Bill.php
+++ b/app/Models/Bill.php
@@ -10,6 +10,7 @@ class Bill extends Model
 {
     protected $fillable = [
         'name',
+        'supplier_id',
         'cost',
         'file_path',
         'deadline',
@@ -23,6 +24,11 @@ class Bill extends Model
 
     protected $appends = ['file_url'];
 
+    public function supplier()
+    {
+        return $this->belongsTo(Supplier::class);
+    }
+
     public function getFileUrlAttribute(): ?string
     {
         if (!$this->file_path) return null;
diff --git a/database/migrations/2026_03_21_121041_add_suppliers_to_bills_table.php b/database/migrations/2026_03_21_121041_add_suppliers_to_bills_table.php
new file mode 100644
index 0000000..8a6ba18
--- /dev/null
+++ b/database/migrations/2026_03_21_121041_add_suppliers_to_bills_table.php
@@ -0,0 +1,29 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('bills', function (Blueprint $table) {
+            $table->foreignId('supplier_id')->after('name')->nullable()->constrained('suppliers')->nullOnDelete();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('bills', function (Blueprint $table) {
+            $table->dropForeign(['supplier_id']);
+            $table->dropColumn('supplier_id');
+        });
+    }
+};