Most people in the UK are paying more tax than they need to. Not because they are doing anything wrong, but because the system is complicated and nobody sits you down and explains what you are actually entitled to. The allowances, reliefs, and wrappers that could save you hundreds or even thousands of pounds a year are all sitting there unused.
None of this is about dodging anything. Every single strategy in this post is completely legal, HMRC approved, and available to you right now. Here is exactly how to pay less tax in the UK and keep more of your own money.
Know Your Personal Allowance and Check Your Tax Code
The starting point for paying less tax is understanding what you are already entitled to. The personal allowance for the 2025/26 tax year is £12,570, meaning you pay no income tax at all on the first £12,570 you earn. Income between £12,571 and £50,270 gets taxed at 20%, and anything above £50,270 is taxed at 40%.
One thing a lot of people miss is checking their tax code. Your code tells your employer how much to deduct, and errors are more common than you would think. Most people should be on tax code 1257L. If yours looks different and you have not had an explanation why, log into your personal tax account on GOV.UK and check. An incorrect code could mean you have been overpaying for months without realising.
Max Out Your ISA Every Year
An ISA is the simplest and most accessible tax saving tool available to anyone in the UK. The annual allowance for 2025/26 sits at £20,000. Everything inside a Stocks and Shares ISA grows completely free from capital gains tax and income tax, no matter how much your investments increase in value over time.
Most people either have a cash ISA earning very little or no ISA at all. Switching to a Stocks and Shares ISA and investing in a low cost index fund is one of the most impactful financial moves you can make. The tax saving compounds year after year alongside the investment growth, making it doubly powerful over the long run.
Pension Contributions Are the Most Powerful Tax Relief Available
Putting money into a pension is one of the most effective legal ways to reduce your tax bill. Every pound you contribute gets tax relief added on top. As a basic rate taxpayer, an £800 contribution from you becomes £1,000 in your pension instantly. Higher rate taxpayers can claim even more back through their self assessment, effectively meaning the government is handing you money to save for retirement.
The annual pension allowance for 2025/26 is £60,000, which covers the total contributions from both you and your employer. Very few people anywhere near that limit, but the key point is that increasing your pension contributions reduces your taxable income directly. If you are close to the £50,270 threshold, pushing more into your pension could bring you back into the basic rate band and save a significant amount in tax.
Salary Sacrifice: Let Your Employer Help You Save
Salary sacrifice is an arrangement where you agree to take a lower salary in exchange for your employer paying the difference directly into your pension. Because your official salary drops, both you and your employer pay less National Insurance. Some employers pass their NI saving back to you as an additional pension contribution, which is essentially free money on top.
Salary sacrifice can also help you avoid the high income child benefit charge if your adjusted net income sits between £60,000 and £80,000, and it can help protect your personal allowance if you are earning above £100,000, where you lose £1 of allowance for every £2 earned above that threshold. By £125,140 your personal allowance is gone entirely, creating an effective 60% tax rate on that band of income. Pension contributions and salary sacrifice are the main tools for bringing that income back below the threshold.
Use Your Capital Gains Tax Allowance
Capital gains tax applies when you sell assets at a profit, things like shares held outside an ISA or a second property. The annual CGT exemption for 2025/26 is £3,000, meaning gains below that threshold attract no tax at all.
Basic rate taxpayers now pay 18% on gains above that allowance, while higher rate taxpayers pay 24%. The key thing to understand here is that assets held inside your ISA are completely exempt from CGT regardless of how large the gain is. Moving investments into your ISA over time using the annual allowance is one of the simplest ways to shelter future growth from this tax entirely.
If you are married or in a civil partnership, assets can also be transferred between you and your partner free from CGT, effectively doubling the exemption available to your household each year.
Claim the Marriage Allowance If You Are Eligible
If one partner earns below the personal allowance of £12,570 and the other pays basic rate tax, the lower earner can transfer 10% of their personal allowance to their partner. This reduces the higher earner’s tax bill by up to £252 a year. It is not a huge amount but it takes five minutes to apply for through the GOV.UK website and can be backdated by up to four tax years, meaning a potential one off payment of over £1,000 if you have never claimed it.
Inheritance Tax: Start Planning Early
Inheritance tax sits at 40% on estates above £325,000, rising to a potential £500,000 threshold if you are passing your main home to direct descendants. Married couples can combine their allowances, meaning up to £1 million can be passed on completely tax free when everything is structured correctly.
One of the simplest ways to reduce your eventual inheritance tax bill is to make use of the annual gifting allowance. You can give away up to £3,000 per year completely free from inheritance tax. Gifts of £250 or less can go to as many different people as you like. Any gift made more than seven years before your death falls outside your estate entirely, which is why early planning makes such a difference with this particular tax.
Check Whether You Are Owed a Tax Rebate
This one surprises a lot of people. If you changed jobs, took unpaid leave, or were put on an emergency tax code at any point in the last four years, there is a reasonable chance you overpaid tax and are owed money back. HMRC does not automatically refund overpayments. You have to claim it yourself through your personal tax account or by writing to HMRC directly.
Employees can also claim tax relief on job related expenses that were not reimbursed by their employer, things like professional subscriptions, work related travel, and uniforms. Most people never bother claiming these but they add up, and claims can be backdated four tax years.
Paying less tax in the UK is not about loopholes or complicated schemes. It is about using the allowances and wrappers the government has already built into the system and that most people simply never get around to using properly. Max out your ISA, increase your pension contributions, check your tax code, and make use of the reliefs available to your household.
Done consistently over a number of years, these steps can save you thousands of pounds that would otherwise disappear to HMRC without you ever really noticing. The money is there. You just need to claim it.
Content on IceburgWealth.com is for informational purposes only and not intended as investment advice. While we strive to provide accurate and up-to-date information, Iceburg Wealth is not responsible for any errors or omissions, or for outcomes resulting from the use of this information. Readers should seek professional advice before making any financial decisions.