uk tax on income calculator

How this UK tax on income calculator works

This UK tax on income calculator estimates what happens to your salary under the PAYE system. It uses current-style income tax bands, applies your personal allowance, and then adds employee National Insurance (NI). The result gives a practical estimate of your annual and monthly take-home pay.

The calculator is useful for quick planning. For example, if you are considering a pay rise, moving jobs, or increasing pension contributions, you can model the change in your net income immediately. It is also helpful for understanding why the increase in your take-home pay is often smaller than your headline gross increase.

What is included in the estimate

• Income tax: Progressive tax bands are applied to taxable income after personal allowance.
• Personal allowance taper: For adjusted income above £100,000, allowance is reduced by £1 for every £2 above that threshold.
• Employee NI: Estimated using standard annual thresholds and rates.
• Pension salary sacrifice: Optional annual amount reduces pay used for tax and NI calculations.

2025/26 tax bands at a glance (used for estimation)

England, Wales, and Northern Ireland

Band	Taxable Band Size	Rate
Basic rate	First £37,700 of taxable income	20%
Higher rate	Next £74,870 of taxable income	40%
Additional rate	Anything above that	45%

Scotland (non-savings, non-dividend income)

Band	Taxable Band Size	Rate
Starter	£2,306	19%
Basic	£11,685	20%
Intermediate	£17,101	21%
Higher	£31,338	42%
Advanced	£50,140	45%
Top	Above that amount	48%

Personal allowance and why high earners notice a steep marginal rate

Most people begin with a personal allowance (commonly £12,570). That means this amount is normally not taxed. Once adjusted net income goes above £100,000, the allowance starts shrinking. For each £2 above £100,000, you lose £1 of allowance. This creates a higher effective marginal tax rate in that range, because you pay tax on both the extra income and the allowance you lose.

This is one reason high earners often use pension contributions to manage taxable income. By sacrificing salary into a pension, it may be possible to preserve more allowance and improve overall tax efficiency.

National Insurance in simple terms

National Insurance is separate from income tax. In this calculator, NI is estimated on annual employment income after salary sacrifice. You pay one rate in the main band and a lower rate above the upper threshold. NI does not use the same personal allowance logic as income tax, so you can still pay NI even when income tax is low in some edge scenarios.

Example: why gross and net differ more than expected

Suppose someone earns £60,000 gross in England with no salary sacrifice. They pay:

• 20% tax on part of their taxable income
• 40% tax on income above the higher-rate entry point
• Employee NI on income above the NI primary threshold

The result is that take-home pay is much lower than gross salary, and each extra pound can be taxed at more than one deduction layer (income tax plus NI). This is normal in UK payroll calculations and not an error in payslips.

Ways people legally reduce their tax burden

• Pension contributions: Especially through salary sacrifice where available.
• Gift Aid donations: Can reduce adjusted net income for allowance purposes.
• Check your tax code: Incorrect codes can over-deduct tax.
• Use ISA allowances: Investment growth and income are generally tax-sheltered within ISA rules.
• Plan bonus timing: In some cases, salary/bonus timing can affect annual outcomes.

Frequently asked questions

Is this calculator an official HMRC tool?

No. It is an educational estimate designed to help with planning and understanding. For exact liabilities, consult HMRC resources or a qualified accountant.

Does it include student loan, childcare, or benefit tapering?

Not in this version. Those items can materially change net pay, so treat this as a baseline salary tax estimate.

Can self-employed people use it?

Only as a rough comparison. Self-employed tax includes income tax, Class 2/Class 4 NI rules, payments on account, and allowable expenses, which are not modeled here.

Final note

If you are comparing job offers or deciding a pension contribution level, this UK tax on income calculator provides a clear first estimate. Use it for decision support, then confirm final numbers with payroll, HMRC, or a tax adviser before making financial commitments.