diff --git a/database/migrations/2026_01_31_200000_add_tenant_prospect_id_to_sales_tables.php b/database/migrations/2026_01_31_200000_add_tenant_prospect_id_to_sales_tables.php
new file mode 100644
index 0000000..4c7a5ac
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+++ b/database/migrations/2026_01_31_200000_add_tenant_prospect_id_to_sales_tables.php
@@ -0,0 +1,51 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * 영업 관리 테이블에 tenant_prospect_id 추가
+     * - 가망고객 단계에서도 영업/매니저 체크리스트 사용 가능하게 함
+     */
+    public function up(): void
+    {
+        // sales_tenant_managements 테이블에 tenant_prospect_id 추가
+        Schema::table('sales_tenant_managements', function (Blueprint $table) {
+            $table->unsignedBigInteger('tenant_prospect_id')->nullable()->after('tenant_id');
+            $table->foreign('tenant_prospect_id')->references('id')->on('tenant_prospects')->onDelete('cascade');
+
+            // tenant_id를 nullable로 변경 (가망고객 단계에서는 tenant 없음)
+            $table->unsignedBigInteger('tenant_id')->nullable()->change();
+        });
+
+        // sales_scenario_checklists 테이블에 tenant_prospect_id 추가
+        Schema::table('sales_scenario_checklists', function (Blueprint $table) {
+            $table->unsignedBigInteger('tenant_prospect_id')->nullable()->after('tenant_id');
+            $table->foreign('tenant_prospect_id')->references('id')->on('tenant_prospects')->onDelete('cascade');
+
+            // tenant_id를 nullable로 변경
+            $table->unsignedBigInteger('tenant_id')->nullable()->change();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('sales_scenario_checklists', function (Blueprint $table) {
+            $table->dropForeign(['tenant_prospect_id']);
+            $table->dropColumn('tenant_prospect_id');
+        });
+
+        Schema::table('sales_tenant_managements', function (Blueprint $table) {
+            $table->dropForeign(['tenant_prospect_id']);
+            $table->dropColumn('tenant_prospect_id');
+        });
+    }
+};