You’ve done the hard part. You’ve built something that works. Clients are coming in, revenue is growing, and your to-do list is longer than ever. But as your business scales, so does one very important question: what can I actually claim as a business expense?

VAT errors aren’t always the result of carelessness. Often, they happen because the rules that applied when you were a sole trader don’t hold as neatly when your turnover starts climbing. What worked at £30k a year doesn’t automatically translate to £90k.