Percentage calculator
Calculate percentages online, including percent of a number, percentage increase, and percentage decrease.
Income tax calculator
Estimate 2026 US federal income tax and FICA, or UK 2026/27 income tax and National Insurance. See take-home pay and tax brackets.
Yearly amount taken before tax
Flat estimate; 0 for states with no income tax
How to use Income tax calculator
Estimate your income tax and take-home pay for the United States or the United Kingdom.
United States (2026 tax year)
- Federal brackets and standard deductions for single, married filing jointly or separately, and head of household
- Social Security (6.2% up to $184,500) and Medicare (1.45%, plus 0.9% above the threshold)
- Optional flat state income tax rate and pre-tax 401(k) contributions
United Kingdom (2026/27)
- Income tax bands for England, Wales and Northern Ireland, with the personal allowance taper above £100,000
- Class 1 employee National Insurance at 8% and 2%
- Pension contributions through salary sacrifice or a net pay arrangement
This is an estimate for salaried income. Tax credits, other income types, and local taxes aren't included.
Income tax calculator FAQs
Is Income tax calculator free?
Income tax calculator is a free online tool on ReallyUseful.Tools. No account is required.
Does Income tax calculator run in my browser?
Income tax calculator is designed to run in your browser where supported, so files can stay on your device instead of being uploaded to a server.
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