UK Income Tax Calculator (2025/26)
Work out your UK income tax and National Insurance for the 2025/26 tax year. Covers personal allowance taper, basic, higher and additional rates.
2025/26 tax year. Includes PA taper above £100k. 45,000 gross → £34,119.60 net.
How this uk tax calculator works
We apply the 2025/26 personal allowance of £12,570, tapering by £1 for every £2 you earn over £100,000.
Taxable income is split across the basic (20%), higher (40%) and additional (45%) rate bands.
Class 1 employee National Insurance is 8% between £12,570 and £50,270, then 2% above that.
Rates apply to England, Wales and Northern Ireland. Scotland has its own income tax bands.
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