Estimate your Self Assessment tax bill for the 2025/26 tax year.
Total Tax Bill
£7,311
Payment on account: £3,656
Total Income
£40,000
Personal Allowance
£12,570
Income Tax
£5,486
National Insurance
£1,825
First Payment (31 Jan)
£10,967
Self Assessment is the system HMRC uses to collect Income Tax from people with income that is not taxed at source. Understanding your obligations and deadlines helps avoid penalties.
Managing your business tax obligations efficiently can make a significant difference to your bottom line. You may also find our Corporation Tax Calculator useful for related calculations.
For a broader view of your finances, try the Employer NI Calculator or the Take-Home Pay Calculator. All of our calculators are free to use and updated for the 2026/27 tax year where applicable.
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