diff --git a/src/database/migrations/1751353749678-add-key-colum-to-setting.ts b/src/database/migrations/1751353749678-add-key-colum-to-setting.ts
new file mode 100644
index 0000000..acf5b72
--- /dev/null
+++ b/src/database/migrations/1751353749678-add-key-colum-to-setting.ts
@@ -0,0 +1,17 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class AddKeyColumToSetting1751353749678 implements MigrationInterface {
+  name = 'AddKeyColumToSetting1751353749678';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `ALTER TABLE "transaction_settings" ADD "key" character varying`,
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `ALTER TABLE "transaction_settings" DROP COLUMN "key"`,
+    );
+  }
+}
diff --git a/src/modules/transaction/sales-price-formula/data/models/sales-price-formula.model.ts b/src/modules/transaction/sales-price-formula/data/models/sales-price-formula.model.ts
index eecbf02..0781b25 100644
--- a/src/modules/transaction/sales-price-formula/data/models/sales-price-formula.model.ts
+++ b/src/modules/transaction/sales-price-formula/data/models/sales-price-formula.model.ts
@@ -42,4 +42,12 @@ export class TransactionSettingModel
 {
   @Column('numeric', { default: 100 })
   value: number;
+
+  @Column('varchar', { nullable: true })
+  key: string;
+
+  //TODO: add logic to get value from key
+  percentValue(): number {
+    return this.value ?? 100;
+  }
 }
diff --git a/src/modules/transaction/sales-price-formula/data/services/sales-price-formula-data.service.ts b/src/modules/transaction/sales-price-formula/data/services/sales-price-formula-data.service.ts
index 66f0fa9..23e46cf 100644
--- a/src/modules/transaction/sales-price-formula/data/services/sales-price-formula-data.service.ts
+++ b/src/modules/transaction/sales-price-formula/data/services/sales-price-formula-data.service.ts
@@ -52,7 +52,7 @@ export class SalesPriceFormulaDataService extends BaseDataService<SalesPriceForm
     const transactionSettingData = await this.transactionSetting.findOne({
       where: {},
     });
-    const percentage = transactionSettingData?.value ?? 100;
+    const percentage = transactionSettingData?.percentValue() ?? 100;
 
     // const transactionPercentage = Math.floor(Math.random() * 100) + 1;
     const transactionPercentage = await this.dataSaveFactor();
diff --git a/src/modules/transaction/sales-price-formula/infrastructure/dto/sales-price-formula.dto.ts b/src/modules/transaction/sales-price-formula/infrastructure/dto/sales-price-formula.dto.ts
index 398f02e..56cc1a4 100644
--- a/src/modules/transaction/sales-price-formula/infrastructure/dto/sales-price-formula.dto.ts
+++ b/src/modules/transaction/sales-price-formula/infrastructure/dto/sales-price-formula.dto.ts
@@ -46,6 +46,12 @@ export class TransactionSettingDto implements TransactionSetting {
     required: true,
   })
   value: number;
+
+  @ApiProperty({
+    type: String,
+    required: false,
+  })
+  key: string;
 }
 
 export class SalesPriceFormulaDto