diff --git a/database/migrations/2026_02_05_200000_add_modified_amount_fields_to_barobill_card_transactions_table.php b/database/migrations/2026_02_05_200000_add_modified_amount_fields_to_barobill_card_transactions_table.php
new file mode 100644
index 0000000..5fc0793
--- /dev/null
+++ b/database/migrations/2026_02_05_200000_add_modified_amount_fields_to_barobill_card_transactions_table.php
@@ -0,0 +1,31 @@
+<?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('barobill_card_transactions', function (Blueprint $table) {
+            $table->decimal('modified_supply_amount', 18, 2)->nullable()->after('tax')
+                ->comment('사용자 수정 공급가액 (null이면 원본값 사용)');
+            $table->decimal('modified_tax', 18, 2)->nullable()->after('modified_supply_amount')
+                ->comment('사용자 수정 부가세 (null이면 원본값 사용)');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('barobill_card_transactions', function (Blueprint $table) {
+            $table->dropColumn(['modified_supply_amount', 'modified_tax']);
+        });
+    }
+};
diff --git a/database/migrations/2026_02_05_200100_create_barobill_card_transaction_amount_logs_table.php b/database/migrations/2026_02_05_200100_create_barobill_card_transaction_amount_logs_table.php
new file mode 100644
index 0000000..3ba303b
--- /dev/null
+++ b/database/migrations/2026_02_05_200100_create_barobill_card_transaction_amount_logs_table.php
@@ -0,0 +1,42 @@
+<?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::dropIfExists('barobill_card_transaction_amount_logs');
+        Schema::create('barobill_card_transaction_amount_logs', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('card_transaction_id')->comment('카드 거래 ID');
+            $table->foreign('card_transaction_id', 'bb_amount_log_trans_fk')
+                ->references('id')->on('barobill_card_transactions')->onDelete('cascade');
+            $table->string('original_unique_key', 255)->comment('거래 고유키 (cardNum|useDt|approvalNum|amount)');
+            $table->decimal('before_supply_amount', 18, 2)->comment('변경 전 공급가액');
+            $table->decimal('before_tax', 18, 2)->comment('변경 전 부가세');
+            $table->decimal('after_supply_amount', 18, 2)->comment('변경 후 공급가액');
+            $table->decimal('after_tax', 18, 2)->comment('변경 후 부가세');
+            $table->unsignedBigInteger('modified_by')->nullable()->comment('수정자 ID');
+            $table->string('modified_by_name', 100)->nullable()->comment('수정자 이름');
+            $table->string('ip_address', 45)->nullable()->comment('수정자 IP');
+            $table->timestamp('created_at')->useCurrent()->comment('수정 시각');
+
+            $table->index('card_transaction_id', 'bb_amount_log_trans_idx');
+            $table->index('original_unique_key', 'bb_amount_log_key_idx');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('barobill_card_transaction_amount_logs');
+    }
+};
diff --git a/database/migrations/2026_02_05_300000_add_is_manual_to_barobill_card_transactions_table.php b/database/migrations/2026_02_05_300000_add_is_manual_to_barobill_card_transactions_table.php
new file mode 100644
index 0000000..0bd6a8a
--- /dev/null
+++ b/database/migrations/2026_02_05_300000_add_is_manual_to_barobill_card_transactions_table.php
@@ -0,0 +1,23 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('barobill_card_transactions', function (Blueprint $table) {
+            $table->boolean('is_manual')->default(false)->after('modified_tax')
+                ->comment('수동 입력 여부 (true: 수동입력, false: 바로빌 API)');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('barobill_card_transactions', function (Blueprint $table) {
+            $table->dropColumn('is_manual');
+        });
+    }
+};