Starting a business is hard enough without accounting mistakes quietly draining cash flow or creating tax problems. This guide covers the 12 most common accounting mistakes new UK businesses make and shows you how to avoid them before they become expensive.

Self Assessment mistakes are rarely about complicated tax rules. They’re usually caused by missed deadlines, forgotten income, incorrect expenses, or last-minute rushing. This practical guide breaks down the most common Self Assessment errors UK taxpayers make, explains what they cost, and shows you exactly how to avoid them.

Choosing the right accountant can transform your business. This guide walks you through what to look for, the questions to ask, typical UK pricing, and how to avoid costly mistakes so you can confidently select the best accounting partner for your needs.