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Home Tax & HMRC How to Pay Less Tax UK 2026: 15 Legal Ways to Reduce Your Tax Bill
Tax & HMRC

How to Pay Less Tax UK 2026: 15 Legal Ways to Reduce Your Tax Bill

15 legal ways to reduce your UK tax bill in 2026 — pensions, ISAs, salary sacrifice, marriage allowance, CGT planning and more explained clearly.

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Chandraketu Tripathi
Finance Editor, Kaeltripton
Published 3 Apr 2026
Last reviewed 12 Apr 2026
✓ Fact-checked
How to Pay Less Tax UK 2026: 15 Legal Ways to Reduce Your Tax Bill

Tax Guide — 2026/27

With income tax thresholds frozen until 2031 and dividend tax rising from April 2026, the UK tax burden has never been higher for middle-income earners. But there are 15 completely legal ways to reduce your bill — and most people use fewer than three of them.

This guide covers every legitimate tax reduction strategy available to UK individuals in 2026, from pension contributions and ISAs to salary sacrifice, marriage allowance, and claiming expenses you may be overlooking.

1. Maximise Your Pension Contributions

Every pound you contribute to a pension reduces your taxable income by a pound. A higher-rate taxpayer contributing £10,000 to their pension gets £4,000 back in tax relief — effectively making a £10,000 contribution cost just £6,000.

Taxpayer RateCost of £10,000 Pension ContributionTax Relief Received
Basic rate (20%)£8,000£2,000
Higher rate (40%)£6,000£4,000
Additional rate (45%)£5,500£4,500

The annual pension allowance is £60,000 for 2026/27. If you haven't used your full allowance in the past three years, you can carry it forward — meaning you could contribute up to £180,000 in a single year.

2. Use Your Full ISA Allowance

The ISA allowance is £20,000 for 2026/27. Income and gains inside an ISA are completely tax-free — no income tax on interest, no capital gains tax on investment growth, no dividend tax. For higher earners, this can save thousands per year.

From April 2027, the Cash ISA limit for under-65s drops to £12,000. The 2026/27 tax year is one of the last chances to put the full £20,000 in cash. See our guide to the Best ISA Accounts UK 2026 for the top rates.

3. Salary Sacrifice

Salary sacrifice lets you swap part of your salary for benefits — reducing both income tax and National Insurance contributions. Common salary sacrifice schemes include:

  • Pension contributions (most common and valuable)
  • Electric car (company car scheme)
  • Cycle to work scheme
  • Childcare vouchers (legacy scheme)
  • Additional annual leave

On a £50,000 salary, sacrificing £5,000 into pension via salary sacrifice saves approximately £2,000 in income tax plus £600 in NIC — a total saving of £2,600 on a £5,000 contribution.

4. Claim the Marriage Allowance

If one partner earns below the personal allowance (£12,570) and the other is a basic rate taxpayer, you can transfer £1,260 of the lower earner's allowance to the higher earner — saving up to £252 per year. You can also backdate the claim up to four tax years, potentially recovering over £1,000.

5. Use Your Capital Gains Tax Allowance

The CGT annual exempt amount is just £3,000 for 2026/27 — significantly reduced from £12,300 in 2022/23. But it's still worth using. Sell assets (shares, investment property, crypto) strategically each year to use the allowance rather than letting gains accumulate and triggering a large bill in one year.

Asset TypeCGT Rate (Basic Rate Taxpayer)CGT Rate (Higher Rate Taxpayer)
Shares and investments18%24%
Residential property18%24%
Business assets (BADR)18%18%
Annual exempt amount£3,000 tax-free£3,000 tax-free

6. Claim All Allowable Expenses (Self-Employed)

If you're self-employed, every £1 of allowable expenses reduces your taxable profit — saving you both income tax and Class 4 NIC. Many self-employed people underclaim. Common missed expenses include:

  • Home office costs (either flat rate or actual calculation)
  • Business mileage (45p/mile for first 10,000 miles)
  • Professional subscriptions and memberships
  • Training courses directly related to your trade
  • Business insurance
  • Accountancy fees
  • Marketing and advertising costs
  • Phone and broadband (business proportion)

7. Bed and ISA

If you hold investments outside an ISA that have grown in value, you can sell them (triggering CGT up to your annual exempt amount) and immediately repurchase inside an ISA. This 'beds' the gains in a tax-free wrapper — future growth and income are then completely exempt.

8. Invest in an Enterprise Investment Scheme (EIS)

EIS investments offer 30% income tax relief on investments up to £1 million per year — meaning a £100,000 EIS investment reduces your tax bill by £30,000. Gains are also CGT-free if held for three years. EIS investments are high-risk and illiquid, but for higher earners the tax relief is substantial.

9. Gift Aid Your Charitable Donations

If you donate to charity, Gift Aid allows the charity to reclaim 25p per pound donated. But higher-rate taxpayers can also claim the difference between their rate and the basic rate — effectively giving an additional 20–25% tax relief on top.

10. Use Your Dividend Allowance

The dividend allowance is £500 for 2026/27. If you own a limited company, structuring salary and dividends carefully can still reduce your overall tax burden — though dividend tax rates rose in April 2026. Work with an accountant to model the optimal split for your income level.

11. Claim Working From Home Relief

Employees who work from home can claim £6/week (£312/year) as a flat-rate deduction without needing to keep records. Higher earners can claim actual costs if they exceed the flat rate. This must be claimed via a self-assessment tax return or HMRC's online tool.

12. Check Your Tax Code

HMRC estimates your tax code based on information it holds — and it's often wrong. An incorrect code means you either pay too much or too little. Check your code at HMRC's Personal Tax Account. Common errors include emergency codes (1257L is the standard code), incorrect benefit-in-kind values, and missing allowances.

13. Make Use of the Trading Allowance

If you have a side income from selling goods or services (eBay, Etsy, freelance work), the first £1,000 is completely tax-free under the Trading Allowance. You don't need to register as self-employed or file a tax return for income below this threshold.

14. Spread Income Between Partners

If one partner pays a higher rate of tax than the other, transferring income-producing assets (savings accounts, investment portfolios, rental property) into the lower earner's name can reduce the household tax bill substantially — as long as the transfer is genuine and unconditional.

15. Contribute to a Lifetime ISA for Property Purchase

The Lifetime ISA gives a 25% government bonus on contributions up to £4,000 per year — equivalent to basic rate tax relief. If you're under 40 and buying your first home, contributing £4,000 per year generates a £1,000 bonus on top. For a couple, that's £2,000 of free money per year. See our guide to First-Time Buyer Schemes UK 2026.

✅ Quick wins — do these today

  • Check your tax code at HMRC Personal Tax Account
  • Claim marriage allowance if eligible — and backdate 4 years
  • Set up or increase pension contributions via salary sacrifice
  • Use your £20,000 ISA allowance before 5 April 2027
  • If self-employed, review your expense claims with an accountant

Bottom line: The average UK basic-rate taxpayer could legally save £500–£2,000 per year by using pension salary sacrifice, maximising their ISA, and claiming marriage allowance. Higher earners who also use EIS, carry-forward pension allowances, and CGT bed-and-ISA strategies can save significantly more. None of this is aggressive tax avoidance — it's using the system exactly as the government designed it.

By Chandraketu Tripathi · Updated April 2026 · kaeltripton.com

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Editorial Disclaimer

The content on Kaeltripton.com is for informational and educational purposes only and does not constitute financial, investment, tax, legal or regulatory advice. Kaeltripton.com is not authorised or regulated by the Financial Conduct Authority (FCA) and is not a financial adviser, mortgage broker, insurance intermediary or investment firm. Nothing on this site should be construed as a personal recommendation. Rates, figures and product details are indicative only, subject to change without notice, and should always be verified directly with the relevant provider, HMRC, the FCA register, the Bank of England, Ofgem or other appropriate authority before any financial decision is made. Past performance is not a reliable indicator of future results. If you require regulated financial advice, please consult a qualified adviser authorised by the FCA. For readers outside the UK: content is written for a UK audience and may not reflect the laws, regulations or products available in your jurisdiction. Kaeltripton.com and its contributors accept no liability for any loss or damage arising from reliance on the information provided.

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Chandraketu Tripathi
Finance Editor · Kaeltripton.com
22 years in global marketing and finance publishing. Specialist in UK personal finance, insurance, tax and consumer money guides.

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