If you earn £40,000 per year in the UK, your total tax and National Insurance will be £8,032, leaving you with a take-home pay of £31,968 per year or £2,664 per month.
Here is the full breakdown for the 2025/26 tax year:
Your personal allowance is £12,570, which means you pay no tax on the first £12,570 of your income. The remaining £27,430 is your taxable income, all of which falls within the basic rate band and is taxed at 20%.
Income tax: £5,486 (20% on £27,430) National Insurance: £2,546 (8% on earnings between £12,570 and £40,000) Total deductions: £8,032 Take-home pay: £31,968 per year (£2,664 per month)
Your effective tax rate is 20.08%, meaning for every £1 you earn, about 20p goes to tax and NI. Your marginal tax rate is 28% (20% income tax plus 8% NI), which means any pay rise will be taxed at this combined rate.
If you have a student loan on Plan 2, you would also repay £1,143 per year (9% of income above £27,295), reducing your take-home to £30,825.
Adding a 5% pension contribution through salary sacrifice would reduce your tax bill by £400 per year while putting £2,000 into your pension — an effective cost of only £1,600 from your take-home pay.
Use our take-home pay calculator for a personalised calculation with student loan and pension options.