diff --git a/database/migrations/2025_06_26_131356_add_bonus_columns_to_entry_total_scores.php b/database/migrations/2025_06_26_131356_add_bonus_columns_to_entry_total_scores.php
new file mode 100644
index 0000000..54c4c08
--- /dev/null
+++ b/database/migrations/2025_06_26_131356_add_bonus_columns_to_entry_total_scores.php
@@ -0,0 +1,32 @@
+<?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('entry_total_scores', function (Blueprint $table) {
+            $table->decimal('bonus_total', 9, 6)->nullable()->after('advancement_subscore_totals');
+            $table->decimal('seating_total_with_bonus', 9, 6)
+                ->storedAs('seating_total + COALESCE(bonus_total, 0)')
+                ->after('bonus_total');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('entry_total_scores', function (Blueprint $table) {
+            $table->dropColumn('bonus_total');
+            $table->dropColumn('seating_total_with_bonus');
+        });
+    }
+};