diff --git a/internal/service/transaction.go b/internal/service/transaction.go
index 9415871..b1a536d 100644
--- a/internal/service/transaction.go
+++ b/internal/service/transaction.go
@@ -56,7 +56,9 @@ func (s TransactionImpl) Add(tx *sqlx.Tx, user *types.User, transactionInput typ
 	}
 
 	var err error
+	ownsTransaction := false
 	if tx == nil {
+		ownsTransaction = true
 		tx, err = s.db.Beginx()
 		err = db.TransformAndLogDbError("transaction Add", nil, err)
 		if err != nil {
@@ -104,10 +106,12 @@ func (s TransactionImpl) Add(tx *sqlx.Tx, user *types.User, transactionInput typ
 		}
 	}
 
-	err = tx.Commit()
-	err = db.TransformAndLogDbError("transaction Add", nil, err)
-	if err != nil {
-		return nil, err
+	if ownsTransaction {
+		err = tx.Commit()
+		err = db.TransformAndLogDbError("transaction Add", nil, err)
+		if err != nil {
+			return nil, err
+		}
 	}
 
 	return transaction, nil