Billing for expenses

Hello Catherine, welcome to the QuickBooks Community page. If this is not an allowable expense because you have passed on the mileage cost and therefore cannot claim for it.  Essentially you would either record it in a disallowable category in Self Employed QuickBooks or not record it as a business expense at all. More information on the allowable/disallowable categories can be found here . We'd recommend consulting with HMRC or an accountant, as we are not trained accountants, so though we can tell you how to record the transaction and what category would impact what section based on simplified/actual accounting methods, we can't give advice. We welcome other users to add to the thread if they have had a similar situation.