How Much Tax Do I Pay on Self Assessment?

Self Assessment is the system HM Revenue & Customs uses to collect information needed to calculate tax that has not necessarily been collected automatically through systems such as PAYE. Your final bill depends on what you earned, where the income came from, the expenses and reliefs you can claim, and how much tax you have already paid.
Smart Tax & Accounting Practices Every Business Owner Should Know

Running a business means wearing a dozen hats at once — salesperson, manager, recruiter, and often, reluctant bookkeeper. Yet few areas of business have as much quiet influence over long-term success as tax planning and accounting discipline. Get them right, and you free up cash, avoid penalties, and make smarter decisions all year. Get them […]
Smart Tax & Accounting Practices Every Business Owner Should Know

Running a business means wearing a dozen hats at once — salesperson, manager, recruiter, and often, reluctant bookkeeper. Yet few areas of business have as much quiet influence over long-term success as tax planning and accounting discipline. Get them right, and you free up cash, avoid penalties, and make smarter decisions all year. Get them […]
Self Assessment 2026: the complete deadline & penalty guide

If you’re self-employed, a landlord, a company director, or anyone with untaxed income in the UK, Self Assessment is probably a fixture on your calendar whether you like it or not. And 2026 is shaping up to be a year of real change for how HMRC handles deadlines and penalties — not just the usual […]
Self Assessment 2026: the complete deadline & penalty guide Landlords

Miss the 31 January deadline and HMRC’s penalties stack up fast. Here’s every key date, how late-filing fines are calculated, and the legitimate ways to reduce what you owe — explained without the jargon.