How to Legally Reduce Your Tax Bill in the UK

There are several completely legal ways to reduce your UK tax bill. Tax avoidance (using allowances and reliefs as intended by Parliament) is perfectly fine — it is tax evasion (hiding income) that is illegal.

Use your allowances: personal allowance (£12,570), trading allowance (£1,000), savings interest allowance (£1,000 for basic rate), dividend allowance (£500), and capital gains annual exempt amount (£3,000). Each of these shields a portion of income from tax at no cost.

Tax-efficient wrappers: ISAs shelter £20,000 per year from all tax. Pension contributions get tax relief at your marginal rate — a higher-rate taxpayer contributing £10,000 effectively costs only £6,000 after tax relief. Gift Aid donations extend your basic-rate band.

For the self-employed: claim all allowable business expenses, consider salary-plus-dividend extraction if operating through a limited company, and make pension contributions through the company for corporation tax relief.