diff --git a/app/Console/Commands/ProcessInvoiceReminders.php b/app/Console/Commands/ProcessInvoiceReminders.php
index 4f59d641..6fdc7a4d 100644
--- a/app/Console/Commands/ProcessInvoiceReminders.php
+++ b/app/Console/Commands/ProcessInvoiceReminders.php
@@ -19,17 +19,28 @@ public function __construct(BillingService $billingService)
     }
 
     public function handle()
-    {
+{
+    if (cache()->get('processing_invoice_reminders')) {
+        $this->warn('Invoice reminder processing is already running');
+        return Command::FAILURE;
+    }
+
+    cache()->put('processing_invoice_reminders', true, 60); // Lock for 60 minutes
+
+    try {
         $this->info('Processing invoice reminders...');
         
-        // Process upcoming invoice reminders
         $upcomingCount = $this->billingService->sendUpcomingInvoiceReminders();
         $this->info("Sent {$upcomingCount} upcoming invoice reminders");
         
-        // Process overdue invoice reminders
         $overdueCount = $this->billingService->sendOverdueReminders();
         $this->info("Sent {$overdueCount} overdue invoice reminders");
         
+        cache()->forget('processing_invoice_reminders');
         return Command::SUCCESS;
+    } catch (\Exception $e) {
+        cache()->forget('processing_invoice_reminders');
+        $this->error("Error processing reminders: " . $e->getMessage());
+        return Command::FAILURE;
     }
 }
\ No newline at end of file
diff --git a/app/Console/Kernel.php b/app/Console/Kernel.php
index 4fb3b370..cfb0e115 100644
--- a/app/Console/Kernel.php
+++ b/app/Console/Kernel.php
@@ -24,12 +24,37 @@ protected function schedule(Schedule $schedule): void
         $schedule->command('audit:prune')->daily();
 
         $schedule->call(function () {
-            $reports = Report::whereNotNull('schedule')->get();
-            foreach ($reports as $report) {
-                if ($this->shouldGenerateReport($report)) {
-                    app(ReportGenerationService::class)->generateReport($report);
-                    $report->update(['last_generated_at' => now()]);
+            try {
+                $reports = Report::query()
+                    ->whereNotNull('schedule')
+                    ->where(function ($query) {
+                        $query->whereNull('last_generated_at')
+                            ->orWhere('last_generated_at', '<=', now()->subHour());
+                    })
+                    ->get();
+
+                foreach ($reports as $report) {
+                    try {
+                        if ($this->shouldGenerateReport($report)) {
+                            app(ReportGenerationService::class)->generateReport($report);
+                            $report->update([
+                                'last_generated_at' => now(),
+                                'last_generation_status' => 'success'
+                            ]);
+                        }
+                    } catch (\Exception $e) {
+                        \Log::error('Failed to generate report: ' . $e->getMessage(), [
+                            'report_id' => $report->id,
+                            'error' => $e->getMessage()
+                        ]);
+                        $report->update([
+                            'last_generation_status' => 'failed',
+                            'last_error' => $e->getMessage()
+                        ]);
+                    }
                 }
+            } catch (\Exception $e) {
+                \Log::error('Failed to process report generation schedule: ' . $e->getMessage());
             }
         })->hourly();
     }
@@ -40,11 +65,18 @@ protected function shouldGenerateReport(Report $report): bool
             return true;
         }
 
+        if (!isset($report->schedule['frequency'])) {
+            return false;
+        }
+
         $schedule = $report->schedule;
+        $lastGenerated = $report->last_generated_at;
+
         return match($schedule['frequency']) {
-            'daily' => $report->last_generated_at->diffInDays(now()) >= 1,
-            'weekly' => $report->last_generated_at->diffInWeeks(now()) >= 1,
-            'monthly' => $report->last_generated_at->diffInMonths(now()) >= 1,
+            'daily' => $lastGenerated->diffInDays(now()) >= 1,
+            'weekly' => $lastGenerated->diffInWeeks(now()) >= 1,
+            'monthly' => $lastGenerated->diffInMonths(now()) >= 1,
+            'hourly' => $lastGenerated->diffInHours(now()) >= 1,
             default => false
         };
     }