diff --git a/src/Application/TakeoutSaaS.Application/App/Billings/Handlers/ProcessOverdueBillingsCommandHandler.cs b/src/Application/TakeoutSaaS.Application/App/Billings/Handlers/ProcessOverdueBillingsCommandHandler.cs
index 2d6ab08..0cb8c5b 100644
--- a/src/Application/TakeoutSaaS.Application/App/Billings/Handlers/ProcessOverdueBillingsCommandHandler.cs
+++ b/src/Application/TakeoutSaaS.Application/App/Billings/Handlers/ProcessOverdueBillingsCommandHandler.cs
@@ -1,6 +1,6 @@
 using MediatR;
 using TakeoutSaaS.Application.App.Billings.Commands;
-using TakeoutSaaS.Domain.Tenants.Repositories;
+using TakeoutSaaS.Domain.Tenants.Services;
 
 namespace TakeoutSaaS.Application.App.Billings.Handlers;
 
@@ -8,42 +8,13 @@ namespace TakeoutSaaS.Application.App.Billings.Handlers;
 /// 处理逾期账单命令处理器（后台任务）。
 /// </summary>
 public sealed class ProcessOverdueBillingsCommandHandler(
-    ITenantBillingRepository billingRepository)
+    IBillingDomainService billingDomainService)
     : IRequestHandler<ProcessOverdueBillingsCommand, int>
 {
     /// <inheritdoc />
     public async Task<int> Handle(ProcessOverdueBillingsCommand request, CancellationToken cancellationToken)
     {
-        // 1. 查询逾期账单（到期日已过且未支付）
-        var overdueBillings = await billingRepository.GetOverdueBillingsAsync(cancellationToken);
-        if (overdueBillings.Count == 0)
-        {
-            return 0;
-        }
-
-        // 2. (空行后) 标记为逾期并更新通知时间
-        var now = DateTime.UtcNow;
-        var updatedCount = 0;
-        foreach (var billing in overdueBillings)
-        {
-            var before = billing.Status;
-            billing.MarkAsOverdue();
-
-            if (before != billing.Status)
-            {
-                billing.OverdueNotifiedAt ??= now;
-                await billingRepository.UpdateAsync(billing, cancellationToken);
-                updatedCount++;
-            }
-        }
-
-        // 3. (空行后) 持久化
-        if (updatedCount > 0)
-        {
-            await billingRepository.SaveChangesAsync(cancellationToken);
-        }
-
-        return updatedCount;
+        // 1. 委托领域服务执行逾期账单处理（Pending && DueDate < Now -> Overdue）
+        return await billingDomainService.ProcessOverdueBillingsAsync(cancellationToken);
     }
 }
-
diff --git a/src/Infrastructure/TakeoutSaaS.Infrastructure/App/Persistence/Repositories/TenantBillingRepository.cs b/src/Infrastructure/TakeoutSaaS.Infrastructure/App/Persistence/Repositories/TenantBillingRepository.cs
index ac3db16..0dc570b 100644
--- a/src/Infrastructure/TakeoutSaaS.Infrastructure/App/Persistence/Repositories/TenantBillingRepository.cs
+++ b/src/Infrastructure/TakeoutSaaS.Infrastructure/App/Persistence/Repositories/TenantBillingRepository.cs
@@ -102,14 +102,13 @@ public sealed class TenantBillingRepository(TakeoutAppDbContext context) : ITena
         // 1. 以当前 UTC 时间作为逾期判断基准
         var now = DateTime.UtcNow;
 
-        // 2. (空行后) 查询逾期且未结清/未取消的账单
+        // 2. (空行后) 查询逾期且仍处于待支付的账单（仅 Pending 才允许自动切换为 Overdue）
         return await context.TenantBillingStatements
             .IgnoreQueryFilters()
             .AsNoTracking()
             .Where(x => x.DeletedAt == null
                         && x.DueDate < now
-                        && x.Status != TenantBillingStatus.Paid
-                        && x.Status != TenantBillingStatus.Cancelled)
+                        && x.Status == TenantBillingStatus.Pending)
             .OrderBy(x => x.DueDate)
             .ToListAsync(cancellationToken);
     }
diff --git a/src/Infrastructure/TakeoutSaaS.Infrastructure/App/Services/BillingDomainService.cs b/src/Infrastructure/TakeoutSaaS.Infrastructure/App/Services/BillingDomainService.cs
index 0cf1759..73b019e 100644
--- a/src/Infrastructure/TakeoutSaaS.Infrastructure/App/Services/BillingDomainService.cs
+++ b/src/Infrastructure/TakeoutSaaS.Infrastructure/App/Services/BillingDomainService.cs
@@ -147,14 +147,14 @@ public sealed class BillingDomainService(
     /// <inheritdoc />
     public async Task<int> ProcessOverdueBillingsAsync(CancellationToken cancellationToken = default)
     {
-        // 1. 查询当前已逾期且未支付/未取消的账单（由仓储按 DueDate 筛选）
+        // 1. 查询当前已超过到期日且仍处于待支付的账单（由仓储按 DueDate + Status 筛选）
         var overdueBillings = await billingRepository.GetOverdueBillingsAsync(cancellationToken);
         if (overdueBillings.Count == 0)
         {
             return 0;
         }
 
-        // 2. (空行后) 批量标记逾期（仅处理 Pending）
+        // 2. (空行后) 批量标记逾期（防御性：再次判断 Pending）
         var processedAt = DateTime.UtcNow;
         var updated = 0;
         foreach (var billing in overdueBillings)
diff --git a/src/Modules/TakeoutSaaS.Module.Scheduler/Extensions/SchedulerServiceCollectionExtensions.cs b/src/Modules/TakeoutSaaS.Module.Scheduler/Extensions/SchedulerServiceCollectionExtensions.cs
index 34bd320..337ec40 100644
--- a/src/Modules/TakeoutSaaS.Module.Scheduler/Extensions/SchedulerServiceCollectionExtensions.cs
+++ b/src/Modules/TakeoutSaaS.Module.Scheduler/Extensions/SchedulerServiceCollectionExtensions.cs
@@ -32,6 +32,11 @@ public static class SchedulerServiceCollectionExtensions
             .ValidateDataAnnotations()
             .ValidateOnStart();
 
+        services.AddOptions<BillingAutomationOptions>()
+            .Bind(configuration.GetSection("Scheduler:BillingAutomation"))
+            .ValidateDataAnnotations()
+            .ValidateOnStart();
+
         services.AddHangfire((serviceProvider, config) =>
         {
             var options = serviceProvider.GetRequiredService<IOptionsMonitor<SchedulerOptions>>().CurrentValue;
@@ -59,6 +64,7 @@ public static class SchedulerServiceCollectionExtensions
         services.AddScoped<SubscriptionRenewalReminderJob>();
         services.AddScoped<SubscriptionExpiryCheckJob>();
         services.AddScoped<SubscriptionAutoRenewalJob>();
+        services.AddScoped<BillingOverdueProcessJob>();
 
         return services;
     }
diff --git a/src/Modules/TakeoutSaaS.Module.Scheduler/Jobs/BillingOverdueProcessJob.cs b/src/Modules/TakeoutSaaS.Module.Scheduler/Jobs/BillingOverdueProcessJob.cs
new file mode 100644
index 0000000..e17a784
--- /dev/null
+++ b/src/Modules/TakeoutSaaS.Module.Scheduler/Jobs/BillingOverdueProcessJob.cs
@@ -0,0 +1,32 @@
+using MediatR;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using TakeoutSaaS.Application.App.Billings.Commands;
+using TakeoutSaaS.Module.Scheduler.Options;
+
+namespace TakeoutSaaS.Module.Scheduler.Jobs;
+
+/// <summary>
+/// 账单逾期标记任务：将超过到期日的待支付账单标记为逾期。
+/// </summary>
+public sealed class BillingOverdueProcessJob(
+    IMediator mediator,
+    IOptionsMonitor<BillingAutomationOptions> optionsMonitor,
+    ILogger<BillingOverdueProcessJob> logger)
+{
+    /// <summary>
+    /// 执行逾期账单标记。
+    /// </summary>
+    public async Task ExecuteAsync()
+    {
+        // 1. 读取配置并执行逾期处理
+        var options = optionsMonitor.CurrentValue;
+        var updatedCount = await mediator.Send(new ProcessOverdueBillingsCommand());
+
+        // 2. 记录执行结果
+        logger.LogInformation(
+            "定时任务：逾期账单标记完成，更新 {UpdatedCount} 条（Cron={Cron}）",
+            updatedCount,
+            options.OverdueBillingProcessCron);
+    }
+}
diff --git a/src/Modules/TakeoutSaaS.Module.Scheduler/Options/BillingAutomationOptions.cs b/src/Modules/TakeoutSaaS.Module.Scheduler/Options/BillingAutomationOptions.cs
new file mode 100644
index 0000000..2ced3bc
--- /dev/null
+++ b/src/Modules/TakeoutSaaS.Module.Scheduler/Options/BillingAutomationOptions.cs
@@ -0,0 +1,16 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace TakeoutSaaS.Module.Scheduler.Options;
+
+/// <summary>
+/// 账单自动化相关配置（逾期标记等）。
+/// </summary>
+public sealed class BillingAutomationOptions
+{
+    /// <summary>
+    /// 逾期账单标记任务 Cron 表达式（Hangfire）。
+    /// 默认每 10 分钟执行一次。
+    /// </summary>
+    [Required]
+    public string OverdueBillingProcessCron { get; set; } = "*/10 * * * *";
+}
diff --git a/src/Modules/TakeoutSaaS.Module.Scheduler/Services/RecurringJobRegistrar.cs b/src/Modules/TakeoutSaaS.Module.Scheduler/Services/RecurringJobRegistrar.cs
index 7dd98b2..71c90f0 100644
--- a/src/Modules/TakeoutSaaS.Module.Scheduler/Services/RecurringJobRegistrar.cs
+++ b/src/Modules/TakeoutSaaS.Module.Scheduler/Services/RecurringJobRegistrar.cs
@@ -9,7 +9,10 @@ namespace TakeoutSaaS.Module.Scheduler.Services;
 /// <summary>
 /// 周期性任务注册器。
 /// </summary>
-public sealed class RecurringJobRegistrar(IOptionsMonitor<SubscriptionAutomationOptions> subscriptionAutomationOptions) : IRecurringJobRegistrar
+public sealed class RecurringJobRegistrar(
+    IOptionsMonitor<SubscriptionAutomationOptions> subscriptionAutomationOptions,
+    IOptionsMonitor<BillingAutomationOptions> billingAutomationOptions)
+    : IRecurringJobRegistrar
 {
     /// <inheritdoc />
     public Task RegisterAsync(CancellationToken cancellationToken = default)
@@ -34,7 +37,13 @@ public sealed class RecurringJobRegistrar(IOptionsMonitor<SubscriptionAutomation
             job => job.ExecuteAsync(),
             $"0 {options.SubscriptionExpiryCheckExecuteHourUtc} * * *");
 
+        // 3. (空行后) 账单自动化任务（逾期标记）
+        var billingOptions = billingAutomationOptions.CurrentValue;
+        RecurringJob.AddOrUpdate<BillingOverdueProcessJob>(
+            "billings.overdue-process",
+            job => job.ExecuteAsync(),
+            billingOptions.OverdueBillingProcessCron);
+
         return Task.CompletedTask;
     }
 }
-