How to Reduce Your Tax Bill Legally in 2025/26

With UK income tax rates reaching 45% (or 48% in Scotland), it pays to know the legal ways to reduce your tax burden. Here are the most effective strategies for 2025/26.

1. Maximise Your Pension Contributions

Pension contributions are one of the most effective ways to reduce your tax bill. Money paid into a pension reduces your taxable income, meaning you save tax at your marginal rate.

For a higher rate taxpayer earning £60,000, a £1,000 pension contribution effectively costs just £600 after tax relief. Via salary sacrifice, you also save the 8% NI that would otherwise apply.

The annual allowance for pension contributions is £60,000 (or 100% of your earnings if lower). If you earn between £100,000 and £125,140, maximising pension contributions to bring your income below £100,000 can be particularly valuable — you get tax relief at an effective 60% rate.

2. Use Your ISA Allowance

Every UK adult can save up to £20,000 per tax year in an ISA (Individual Savings Account). Income and gains within an ISA are completely free of income tax and capital gains tax.

There are several types: Cash ISAs (fixed or variable rate savings), Stocks and Shares ISAs (for investments), Lifetime ISAs (for first-time buyers or retirement, with a 25% government bonus), and Innovative Finance ISAs.

3. Salary Sacrifice Schemes

Many employers offer salary sacrifice schemes where you give up part of your salary in exchange for non-cash benefits. Because you're reducing your gross salary, you pay less income tax and National Insurance.

Common salary sacrifice benefits include: pension contributions, childcare vouchers (for those already enrolled), cycle-to-work schemes, electric car leasing, and additional annual leave purchase.

4. Claim All Allowable Expenses

If you're employed, you may be able to claim tax relief on certain work-related expenses such as professional subscriptions, uniform costs, or working from home allowance (£6/week). Self-employed individuals have much broader expense-claiming rights.

5. Make Charitable Donations via Gift Aid

When you donate to charity and use Gift Aid, the charity can reclaim the basic rate tax (20%) on your donation. As a higher rate taxpayer, you can claim the additional tax relief yourself through your self-assessment tax return.