diff --git a/exthernal-ttc-api/src/services/budgetAddService.js b/exthernal-ttc-api/src/services/budgetAddService.js
index c42691d..4e3b75c 100644
--- a/exthernal-ttc-api/src/services/budgetAddService.js
+++ b/exthernal-ttc-api/src/services/budgetAddService.js
@@ -13,9 +13,23 @@ export class BudgetAddService {
         bdgnam
       FROM ${database}.bdgmst
       WHERE bdgnam = $1
-  `
+    `
     const params = [name]
     const result = await this.generalService.executeQueryParam(database, sql, params);
     return result
   }
+
+  async genNum(database) {
+    const sql = `
+      SELECT 
+        MAX(bdgseq) as max_seq
+      FROM ${database}.bdgmst
+    `
+    const params = []
+    const aryResult = await this.generalService.executeQueryParam(database, sql, params);
+
+    const lastSeq = aryResult[0]?.max_seq || 0;
+
+    return lastSeq + 1;
+  }
 }
\ No newline at end of file