UK Tax Guide 2026: Everything You Need to Know
Navigating the UK tax system can be complex, but whether you're employed, self-employed, or running a small business, understanding your obligations to HMRC is essential to staying compliant and keeping more of your money. This hub covers everything from income tax rates and Self-Assessment deadlines to Capital Gains Tax and Making Tax Digital, keeping you fully informed for the 2025/26 and 2026/27 tax years.
2026 Key Dates
- event5 April 2026
End of 2025/26 tax year - event6 April 2026
Start of 2026/27 tax year - event31 July 2026
Second payment on account deadline - event31 January 2027
Self-Assessment filing deadline
Best UK Tax Tools 2026
3 tools rankedGoSimpleTax
Best for FreelancersGoSimpleTax is an HMRC-recognised Self-Assessment software designed specifically for sole traders, freelancers, and individuals with straightforward tax affairs, offering a clean, jargon-free interface that calculates your tax bill in real time as you enter your income and expenses. It supports direct submission to HMRC and is particularly well-suited to those filing for the first time or switching from paper returns, with plans starting from £35 per year.
TaxCalc
Most ComprehensiveTaxCalc is one of the UK's most feature-rich Self-Assessment and tax return platforms, trusted by both individuals and small businesses to handle everything from straightforward employment income to complex scenarios involving rental properties, capital gains, and multiple income streams. Its built-in calculators and step-by-step guidance make it a powerful choice for anyone who wants full control over their tax return without hiring an accountant, with individual licences starting from £29.99.
Sage Accounting
Best for Small BusinessSage Accounting is a comprehensive cloud-based accounting solution built for UK small businesses and VAT-registered traders, offering full compliance with HMRC's Making Tax Digital requirements and seamless VAT return submission directly to HMRC. With automatic bank feeds, payroll functionality, and real-time profit and loss reporting, Sage gives business owners a complete picture of their finances while keeping them on the right side of their tax obligations throughout the year.
UK Tax Guides
UK Income Tax Rates 2026/27
A full breakdown of the UK income tax bands, Personal Allowance, and rates for basic, higher, and additional rate taxpayers in the 2026/27 tax year.
trending_upCapital Gains Tax UK 2026
Understand how Capital Gains Tax works in the UK, including the current rates, annual exempt amount, and what assets are subject to CGT when you sell or dispose of them.
Frequently Asked Questions
Do I need to file a Self-Assessment tax return?
You are required to file a Self-Assessment tax return with HMRC if you are self-employed as a sole trader and earned more than £1,000 in the tax year, if you are a partner in a business partnership, or if you received untaxed income such as rental income, dividends, or foreign income above certain thresholds. Employees who earn over £100,000 per year, those claiming Child Benefit with income above £60,000, or anyone who received a PAYE income that was not fully taxed at source may also need to file. If you are unsure whether you need to submit a return, you can use HMRC's online tool at gov.uk or contact HMRC directly to check your position.
What is Making Tax Digital (MTD)?
Making Tax Digital is HMRC's initiative to modernise the UK tax system by requiring businesses and individuals to keep digital records and submit tax information to HMRC using compatible software rather than paper returns. MTD for VAT has been mandatory for all VAT-registered businesses since November 2022, and MTD for Income Tax Self-Assessment (MTD for ITSA) is being rolled out from April 2026 for sole traders and landlords with qualifying income above £50,000, with further thresholds following in subsequent years. The change means affected taxpayers will need to submit quarterly updates to HMRC using approved software, replacing the traditional annual Self-Assessment return.
How much income tax will I pay in 2026/27?
In the 2026/27 tax year, most UK adults receive a Personal Allowance of £12,570, meaning you pay no income tax on earnings up to this amount. Income between £12,571 and £50,270 is taxed at the basic rate of 20%, income between £50,271 and £125,140 is taxed at the higher rate of 40%, and any income above £125,140 is taxed at the additional rate of 45%, with the Personal Allowance tapering to zero for those earning over £100,000. Scottish taxpayers are subject to different rates and bands set by the Scottish Government, so it is worth checking the specific Scottish income tax rates if you are a Scottish resident.
What are allowable expenses for self-employed people?
If you are self-employed, HMRC allows you to deduct a wide range of legitimate business expenses from your income before calculating your tax bill, which can significantly reduce the amount of tax you owe. Allowable expenses include office costs such as stationery and phone bills, travel costs like fuel and public transport for business journeys, marketing and advertising costs, professional subscriptions, accountancy fees, and the cost of any stock or materials you buy to complete work. If you work from home, you may also be able to claim a proportion of your household bills or use HMRC's simplified flat rate, but you cannot claim for anything that has a personal as well as a business purpose unless you can reasonably apportion the business element.
What happens if I miss the Self-Assessment deadline?
If you fail to submit your Self-Assessment tax return by the 31 January deadline, HMRC will automatically issue a £100 fixed penalty, even if you have no tax to pay or are due a refund. Further penalties apply the longer the return remains outstanding, including additional charges of £10 per day after three months (up to a maximum of £900), a further £300 or 5% of the tax due after six months, and another £300 or 5% after twelve months. Interest is also charged on any unpaid tax from the 31 January deadline, so it is always worth filing on time or contacting HMRC as soon as possible if you are struggling, as they may consider a reasonable excuse appeal in certain circumstances.
Disclaimer: MoneyRanked is an independent comparison service, not a financial adviser. We may receive a commission if you apply through links on this page. Our editorial team operates independently. Tax rules change — always verify with HMRC or a qualified tax adviser before making decisions.