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Use HM Revenue and Customs’ (HMRC) tax checker to get an estimate of how much Income Tax you should have paid in a previous tax year.
Find out how much you need to put aside for your Self Assessment tax bill by using HM Revenue and Customs' (HMRC's) Self Assessment tax calculator.
Estimate how much Income Tax and National Insurance you can expect to pay for the current tax year (6 April 2026 to 5 April 2027).
If you’ve missed Self Assessment deadlines get an estimate of how much you’ll need to pay in penalties and interest
HMRC publishes the estimated tax gap for the 2024 to 2025 tax year.
Making Tax Digital for Income Tax customers have 2 weeks to submit their first quarterly update.
How to work out payments and when you should make them if your company’s annual taxable profits are between £1.5 million and £20 million.
How and when to send quarterly updates and what’s included in them.
Do not include personal or financial information like your National Insurance number or credit card details.
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