Understanding the UK Tax System for the Self-Employed

Welcome to Module 6: Self Assessment — a quick guide to how the UK tax system works for self-employed individuals, small business owners, and anyone with untaxed income.

If you earn income outside of regular employment — like from freelancing, renting out property, or dividends — you may need to file a self-assessment tax return with HM Revenue and Customs, or HMRC.

If you’re self-employed, run your own business, or earn additional income, you are likely to be required to complete a tax return. But don’t worry — we’ll walk you through the process step-by-step.

In this module, we’ll cover how to register with HMRC, how to report your income and expenses, when and how to pay your tax bill, and — most importantly — how to stay compliant and avoid penalties.

You’ll also get links to essential HMRC tools and resources to help you manage your tax affairs with confidence.

Let’s get started with Module 6: Self Assessment — and make sure you understand exactly what’s required to stay on top of your tax responsibilities.