Bonus After Tax UK — Free Calculator 2025

Overview

Calculate Bonus After Tax UK using the official rates and regulations for United Kingdom.

How it works

Enter the base amount and the calculator will apply the relevant rates and brackets to compute the result.

How Bonuses Are Taxed in the UK

In the UK, bonuses are treated as additional earnings and are subject to Income Tax and National Insurance Contributions (NICs) through the PAYE system. When you receive a bonus, your employer adds it to your regular salary for that pay period and calculates tax accordingly. This can push you into a higher tax band for that month, even if your annual income keeps you in a lower band overall. Understanding how your bonus is taxed helps you plan your finances and avoid surprises when the payment arrives. The timing of your bonus within the tax year can significantly affect how much tax you pay on it.

PAYE and Emergency Tax on Bonuses

Your employer typically uses one of two methods to tax bonuses: the cumulative basis or the non-cumulative basis. On the cumulative basis, your bonus is added to your year-to-date earnings and taxed according to your remaining allowances. On the non-cumulative basis (week 1/month 1 basis), the bonus is taxed in isolation using your standard tax code. If your bonus pushes your total earnings above £100,000, you begin to lose your Personal Allowance at a rate of £1 for every £2 earned above this threshold, creating an effective tax rate of 60% on income between £100,000 and £125,140.

National Insurance on Bonuses

Bonuses are also subject to National Insurance Contributions. For the 2024-25 tax year, employee NICs are charged at 8% on earnings between £12,570 and £50,270, and 2% on earnings above £50,270. Your employer pays 13.8% on all earnings above £9,100. If your bonus pushes your annual earnings above the upper earnings limit, the excess portion of the bonus will only attract 2% employee NICs rather than 8%. This means larger bonuses can actually have a lower effective NIC rate on the portion above the threshold.

Salary Sacrifice for Bonuses

One of the most tax-efficient ways to receive a bonus is through a salary sacrifice arrangement. Instead of receiving the bonus as cash, you can sacrifice it into your pension, gaining immediate tax relief at your highest marginal rate and saving on National Insurance. For a higher rate taxpayer sacrificing a £10,000 bonus into a pension, the net cost could be as low as £5,800 after accounting for the 40% tax and 2% NIC saved. Other salary sacrifice options include cycle-to-work schemes, childcare vouchers, and additional holiday purchase, though the tax benefits vary for each option.

Planning Your Bonus Effectively

Consider the timing and structure of your bonus carefully. If your bonus is paid in April (start of the tax year), you have the full year to manage your tax position. If paid in March, it may push your annual earnings above key thresholds, affecting your Personal Allowance and other benefits. Some employers allow you to defer bonus payments to the next tax year, which can be advantageous if you expect lower earnings. Always check whether your bonus affects other entitlements such as child benefit (if one partner earns over £50,000), student loan repayments, or mortgage applications where lenders may treat bonus income differently.

Tax-Efficient Bonus Structures and Salary Sacrifice Alternatives

Rather than receiving a cash bonus subject to full income tax and National Insurance, employees can often negotiate salary sacrifice arrangements that deliver greater net value. Pension contributions made through salary sacrifice avoid both income tax and employee National Insurance, providing an immediate 32% or 42% saving compared with receiving the bonus as cash. Employer National Insurance contributions of 13.8% are also saved, and some employers pass part of this saving to the employee through higher pension contributions. Other salary sacrifice options include cycle-to-work schemes, electric vehicle salary sacrifice schemes, and childcare vouchers, each offering tax advantages over cash bonuses. For bonuses that must be taken as cash, timing the payment to fall in a tax year where total income remains below a higher-rate threshold can save significant tax. Bonus sacrifice arrangements, formalised since 2017, allow employees to give up the right to a bonus before it is due in exchange for a non-cash benefit, providing flexibility to optimise tax position each year.

National Insurance on Bonuses and Employer Considerations

Bonuses are treated as earnings for National Insurance purposes and are subject to both employee and employer contributions in the pay period they are received. For the 2025-26 tax year, employee NI is charged at 8% on earnings between £12,570 and £50,270, and 2% above that threshold. A £10,000 bonus for a basic-rate taxpayer earning £30,000 would lose approximately £2,000 in income tax and £800 in NI, resulting in a net payment of around £7,200. Employers pay Class 1 NI at 13.8% on bonus payments above the secondary threshold, adding to the total cost of the bonus package. Large bonuses that push annual earnings above £50,270 benefit from the lower 2% NI rate on the excess, though the higher 40% income tax rate simultaneously applies. Understanding the interplay between tax and NI on bonuses is essential for both employers structuring compensation packages and employees evaluating the true value of their bonus.