diff --git a/ts/finance/expense.ts b/ts/finance/expense.ts
index b457519..b37cfd8 100644
--- a/ts/finance/expense.ts
+++ b/ts/finance/expense.ts
@@ -2,6 +2,9 @@ import { IInvoice } from './invoice';
 import { IContact } from '../business/contact';
 
 export interface IExpenseItem {
+  description: string,
+  asset?: boolean,
+  accountingType?: string,
   amount: number;
   taxPercentage: number;
 }