diff --git a/src/CMSMicroservice.Infrastructure/BackgroundServices/ExpirePendingOrdersService.cs b/src/CMSMicroservice.Infrastructure/BackgroundServices/ExpirePendingOrdersService.cs
new file mode 100644
index 0000000..a059bc4
--- /dev/null
+++ b/src/CMSMicroservice.Infrastructure/BackgroundServices/ExpirePendingOrdersService.cs
@@ -0,0 +1,116 @@
+using CMSMicroservice.Application.Common.Interfaces;
+using CMSMicroservice.Domain.Enums;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+
+namespace CMSMicroservice.Infrastructure.BackgroundServices;
+
+/// <summary>
+/// سرویس پس‌زمینه برای منقضی کردن سفارشات تخفیفی که بیش از ۳۰ دقیقه در وضعیت Pending مانده‌اند.
+/// موجودی رزرو شده آزاد و وضعیت پرداخت به Reject تغییر می‌کند.
+/// </summary>
+public class ExpirePendingOrdersService : BackgroundService
+{
+    private readonly IServiceScopeFactory _scopeFactory;
+    private readonly ILogger<ExpirePendingOrdersService> _logger;
+
+    /// <summary>
+    /// مدت زمان انقضا (۳۰ دقیقه)
+    /// </summary>
+    private static readonly TimeSpan ExpirationTime = TimeSpan.FromMinutes(30);
+
+    /// <summary>
+    /// هر ۵ دقیقه چک می‌شود
+    /// </summary>
+    private static readonly TimeSpan CheckInterval = TimeSpan.FromMinutes(5);
+
+    public ExpirePendingOrdersService(
+        IServiceScopeFactory scopeFactory,
+        ILogger<ExpirePendingOrdersService> logger)
+    {
+        _scopeFactory = scopeFactory;
+        _logger = logger;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        _logger.LogInformation("ExpirePendingOrdersService started — checking every {Interval} min, expiring after {Expiry} min",
+            CheckInterval.TotalMinutes, ExpirationTime.TotalMinutes);
+
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            try
+            {
+                await ExpireOldPendingOrders(stoppingToken);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Error in ExpirePendingOrdersService");
+            }
+
+            await Task.Delay(CheckInterval, stoppingToken);
+        }
+    }
+
+    private async Task ExpireOldPendingOrders(CancellationToken cancellationToken)
+    {
+        using var scope = _scopeFactory.CreateScope();
+        var context = scope.ServiceProvider.GetRequiredService<IApplicationDbContext>();
+        var inventoryService = scope.ServiceProvider.GetRequiredService<IInventoryService>();
+
+        var cutoff = DateTime.UtcNow - ExpirationTime;
+
+        // پیدا کردن سفارشات Pending قدیمی
+        var expiredOrders = await context.DiscountOrders
+            .Include(o => o.OrderDetails)
+            .Where(o => o.PaymentStatus == PaymentStatus.Pending && o.Created < cutoff)
+            .ToListAsync(cancellationToken);
+
+        if (!expiredOrders.Any()) return;
+
+        _logger.LogInformation("Found {Count} expired pending orders to clean up", expiredOrders.Count);
+
+        foreach (var order in expiredOrders)
+        {
+            try
+            {
+                // آزادسازی رزرو موجودی
+                foreach (var detail in order.OrderDetails)
+                {
+                    await inventoryService.ReleaseReservationAsync(
+                        detail.ProductId,
+                        ProductType.DiscountProduct,
+                        detail.Count,
+                        order.Id,
+                        cancellationToken);
+                }
+
+                // تغییر وضعیت به Reject
+                order.PaymentStatus = PaymentStatus.Reject;
+
+                // آپدیت تراکنش مربوطه
+                if (order.TransactionId.HasValue)
+                {
+                    var transaction = await context.Transactions
+                        .FirstOrDefaultAsync(t => t.Id == order.TransactionId.Value, cancellationToken);
+                    if (transaction != null)
+                    {
+                        transaction.PaymentStatus = PaymentStatus.Reject;
+                    }
+                }
+
+                _logger.LogInformation(
+                    "Expired order #{OrderId} (created {Created:u}) — inventory released, status set to Reject",
+                    order.Id, order.Created);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Failed to expire order #{OrderId}", order.Id);
+            }
+        }
+
+        await context.SaveChangesAsync(cancellationToken);
+    }
+}
diff --git a/src/CMSMicroservice.Infrastructure/ConfigureServices.cs b/src/CMSMicroservice.Infrastructure/ConfigureServices.cs
index 314e26c..0503b4c 100644
--- a/src/CMSMicroservice.Infrastructure/ConfigureServices.cs
+++ b/src/CMSMicroservice.Infrastructure/ConfigureServices.cs
@@ -4,6 +4,7 @@ using CMSMicroservice.Application.DayaLoanCQ.Services;
 using CMSMicroservice.Infrastructure.Persistence;
 using CMSMicroservice.Infrastructure.Persistence.Interceptors;
 using CMSMicroservice.Infrastructure.BackgroundJobs;
+using CMSMicroservice.Infrastructure.BackgroundServices;
 using CMSMicroservice.Infrastructure.Services.Monitoring;
 using CMSMicroservice.Infrastructure.Services.Authorization;
 using CMSMicroservice.Infrastructure.Configuration;
@@ -119,6 +120,9 @@ public static class ConfigureServices
         services.AddScoped<WeeklyCommissionJob>(); // Hangfire Job (Scoped for DI)
         services.AddScoped<ChatikaAccountActivationJob>(); // Hangfire Job for Chatika activation
         
+        // Expire pending discount orders after 30 minutes
+        services.AddHostedService<ExpirePendingOrdersService>();
+        
         if (configuration.GetValue<bool>("UseInMemoryDatabase"))
         {
             services.AddDbContext<ApplicationDbContext>(options =>
diff --git a/src/CMSMicroservice.Protobuf/CMSMicroservice.Protobuf.csproj b/src/CMSMicroservice.Protobuf/CMSMicroservice.Protobuf.csproj
index 6dbf384..d888312 100644
--- a/src/CMSMicroservice.Protobuf/CMSMicroservice.Protobuf.csproj
+++ b/src/CMSMicroservice.Protobuf/CMSMicroservice.Protobuf.csproj
@@ -3,7 +3,7 @@
     <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
-    <Version>0.0.178</Version>
+    <Version>0.0.179</Version>
     <DebugType>None</DebugType>
     <DebugSymbols>False</DebugSymbols>
     <GeneratePackageOnBuild>False</GeneratePackageOnBuild>
diff --git a/src/CMSMicroservice.Protobuf/Protos/discountorder.proto b/src/CMSMicroservice.Protobuf/Protos/discountorder.proto
index 5e8e362..8de7f08 100644
--- a/src/CMSMicroservice.Protobuf/Protos/discountorder.proto
+++ b/src/CMSMicroservice.Protobuf/Protos/discountorder.proto
@@ -137,6 +137,7 @@ message GetOrderByIdResponse
     repeated OrderItemDto items = 14;
     google.protobuf.Timestamp created = 15;
     google.protobuf.Timestamp last_modified = 16;
+    PaymentStatus payment_status = 17;
 }
 
 message AddressInfo
@@ -191,6 +192,7 @@ message OrderSummaryDto
     google.protobuf.StringValue tracking_code = 8;
     int32 items_count = 9;
     google.protobuf.Timestamp created = 10;
+    PaymentStatus payment_status = 11;
 }
 
 // ===== Admin: Get All Discount Orders =====
diff --git a/src/CMSMicroservice.WebApi/Services/DiscountOrderService.cs b/src/CMSMicroservice.WebApi/Services/DiscountOrderService.cs
index 7d8dbf2..e6e44ce 100644
--- a/src/CMSMicroservice.WebApi/Services/DiscountOrderService.cs
+++ b/src/CMSMicroservice.WebApi/Services/DiscountOrderService.cs
@@ -92,6 +92,7 @@ public class DiscountOrderService : DiscountOrderContract.DiscountOrderContractB
             DiscountBalanceUsed = result.DiscountBalanceUsed,
             GatewayAmount = result.GatewayAmountPaid,
             PaymentCompleted = result.PaymentStatus == DomainEnums.PaymentStatus.Success,
+            PaymentStatus = MapPaymentStatus(result.PaymentStatus),
             DeliveryStatus = (DeliveryStatus)(int)result.DeliveryStatus,
             Created = Timestamp.FromDateTime(DateTime.SpecifyKind(result.Created, DateTimeKind.Utc)),
         };
@@ -151,6 +152,7 @@ public class DiscountOrderService : DiscountOrderContract.DiscountOrderContractB
                 DiscountBalanceUsed = o.DiscountBalanceUsed,
                 GatewayAmount = o.GatewayAmountPaid,
                 PaymentCompleted = o.PaymentStatus == DomainEnums.PaymentStatus.Success,
+                PaymentStatus = MapPaymentStatus(o.PaymentStatus),
                 DeliveryStatus = (DeliveryStatus)(int)o.DeliveryStatus,
                 ItemsCount = o.ItemsCount,
                 Created = Timestamp.FromDateTime(DateTime.SpecifyKind(o.Created, DateTimeKind.Utc)),
@@ -171,4 +173,12 @@ public class DiscountOrderService : DiscountOrderContract.DiscountOrderContractB
     {
         return await _dispatchRequestToCQRS.Handle<GetDiscountSalesReportRequest, GetDiscountSalesReportQuery, GetDiscountSalesReportResponse>(request, context);
     }
+
+    private static CMSMicroservice.Protobuf.Protos.DiscountOrder.PaymentStatus MapPaymentStatus(DomainEnums.PaymentStatus status) => status switch
+    {
+        DomainEnums.PaymentStatus.Success => CMSMicroservice.Protobuf.Protos.DiscountOrder.PaymentStatus.PaymentCompleted,
+        DomainEnums.PaymentStatus.Reject => CMSMicroservice.Protobuf.Protos.DiscountOrder.PaymentStatus.PaymentFailed,
+        DomainEnums.PaymentStatus.Pending => CMSMicroservice.Protobuf.Protos.DiscountOrder.PaymentStatus.PaymentPending,
+        _ => CMSMicroservice.Protobuf.Protos.DiscountOrder.PaymentStatus.PaymentPending
+    };
 }