Reducing your tax bill does not require complex schemes or grey-area planning. The UK tax system includes a range of government-approved reliefs and allowances that are specifically designed to be used. This guide covers the most effective and widely applicable strategies for the 2026/27 tax year.
1. Maximise your pension contributions
Pension contributions are one of the most powerful ways to reduce your tax bill. Contributions to registered pension schemes receive tax relief at your marginal rate. If you pay 40% Higher Rate tax, a £1,000 pension contribution effectively costs you £600 after tax relief.
For 2026/27, you can contribute up to the lower of your annual earnings or £60,000 (the annual allowance) and receive tax relief. If you have unused allowance from the previous three tax years, you may be able to carry it forward.
2. Use salary sacrifice
Salary sacrifice goes further than a standard pension contribution. By giving up part of your gross salary in exchange for a pension contribution, you reduce both your income tax and your National Insurance. Your employer may also pass on some of their NI saving to you, further boosting the benefit.
Salary sacrifice is especially valuable if your income is between £100,000 and £125,140, where the £100K tax trap creates an effective 60% marginal rate. Use the salary sacrifice calculator to model your exact saving.
3. Make Gift Aid donations
Donations to UK charities under Gift Aid allow the charity to reclaim 20% basic rate tax, boosting your £1 donation to £1.25. If you pay 40% or 45% tax, you can claim the additional relief through Self Assessment — the difference between the basic rate already reclaimed and your marginal rate.
Gift Aid donations also reduce your adjusted net income, which is important if you earn over £100,000 and want to preserve your Personal Allowance.
4. Use your ISA allowance
ISAs (Individual Savings Accounts) shelter your savings and investments from income tax and capital gains tax. For 2026/27, you can save up to £20,000 per year in ISAs. Interest, dividends, and growth within an ISA are completely tax-free, both now and in future years when you withdraw the money.
Using an ISA does not reduce your current year tax bill directly, but it prevents future tax liabilities on investment returns — a compounding benefit over time.
5. Claim all allowances you are entitled to
Many people miss allowances they are legitimately entitled to:
- Marriage Allowance — transfer £1,260 of your Personal Allowance to a lower-earning spouse or civil partner, saving up to £252/year.
- Blind Person's Allowance — an extra £3,250 of tax-free income if you are registered blind.
- Working from home relief — claim a flat rate or actual costs if you work from home under a homeworking arrangement.
- Professional subscriptions — fees paid to approved professional bodies are tax-deductible.
Use the income tax calculator to see the effect of pension contributions and other inputs on your take-home pay, or read our guide to UK income tax bands to understand how the rates work.