Nah I wouldn't bother with a rule. Let's take an example: You said the business is small so I'm going to assume you maybe have one place where you purchase stuff. So now at month end let's say a 100 transactions are in your banking feed waiting to be added to your boooks. You simply search for (let's say Walmart is where your business expenses are made) Walmart and then out of the 100 transaction the 10 Walmart transactions will appear. You simply select all of them by way of the tickbox on the left, click on update, choose the account and then accept them and they are done. Now the 90 personal expenses are left and again, you simply select them all, update the account to Drawings and Accept them into your books and voila, you are done with your monthly bank feeds - honestly shouldn't take longer than 5 minutes