Answers · UK 2025/26
How much tax do I pay on £100 a week in the UK?
£100 a week is £5,200 a year, which is well below the £12,570 Personal Allowance, so you pay no Income Tax and no National Insurance. Your take-home pay is the full £100 a week, or £433.33 a month.
Full answer
£100 a week multiplied across a 52-week year gives an annual salary of £5,200, far below both the £12,570 Personal Allowance for Income Tax and the £12,570 Primary Threshold for employee National Insurance for 2026/27. This means no Income Tax and no National Insurance is due on this income at all, so your full £100 a week is take-home pay -- around £433.33 a month or £5,200 a year. £100 a week at the 2026/27 National Living Wage of £12.71 an hour represents roughly 7.9 hours of work, so this figure is typical of a small part-time job, a Saturday job, or one of several part-time roles. If you have more than one job or source of income, remember that only one employer can normally apply your Personal Allowance -- if combined income across all jobs is still below £12,570, you can ask HMRC to split your allowance so tax is not wrongly deducted from a second job under an emergency tax code. Use the Take-Home Pay calculator to check combined income from multiple part-time jobs.
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This answer is informational only and does not constitute financial, tax or legal advice. Figures are for the 2025/26 UK tax year. See our methodology and sources.