The UK tax year runs from 6 April to 5 April the following year. Each year’s end—5 April—serves as a key cutoff date for individuals, businesses, and investors. This deadline carries important implications for tax allowances, pension contributions, capital gains, and income tax calculations. To avoid missing crucial opportunities and reliefs, it is important to understand how the system works, what steps to take before the deadline, and how to prepare for the year ahead. Below, we explore why the tax year end matters, which tasks should be on your to-do list, and how you can take advantage of available tax reliefs and planning strategies.
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The term “tax year end” refers to the final day of a specific UK tax year. For example, if the tax year began on 6 April 2023, it will end on 5 April 2024. Any income, gains, or contributions up to that date fall into the 2023/24 tax year. When the new tax year starts on 6 April, the records and calculations reset for the next 12-month period.
Key Actions by 5 April
Personal Allowance
Most individuals get a personal allowance—an amount of income you can earn before paying Income Tax. For the current tax year, the standard personal allowance is often around £12,570, though it can be higher or lower depending on your total income. This allowance resets every tax year, making it crucial to plan your earnings and, where possible, avoid crossing thresholds that push you into a higher tax band.
ISA Allowance
ISAs (Individual Savings Accounts) allow you to save or invest money without paying tax on interest or capital gains. In the current tax year, you can put up to £20,000 in ISAs in total across different types of ISAs (Cash ISA, Stocks & Shares ISA, Lifetime ISA, and Innovative Finance ISA). This limit does not roll over: if you do not use it by the tax year end, you lose it. Consequently, many people top up their ISAs in March or early April to make the most of their tax-free allowance.
Pension Contributions
Pension contributions can be a powerful way to save for retirement and reduce your taxable income. Usually, contributions attract tax relief at your highest marginal rate (subject to annual and lifetime allowances). For the current tax year, the standard annual allowance for most people is £40,000 or 100% of your earnings—whichever is lower—though this can vary if you have a higher income or have already accessed your pension. If you have unused allowance from previous years, you may also be eligible for “carry forward,” enabling you to make additional contributions above the annual limit. Make sure any intended contributions are processed before the tax year ends, or you risk losing valuable relief.
Capital Gains Tax Allowance
Each tax year, you have a Capital Gains Tax (CGT) allowance (referred to as the annual exempt amount). Gains below this threshold are not subject to CGT. If you plan to sell shares, second properties, or other chargeable assets, consider the timing of disposals to take full advantage of this annual exemption. Splitting disposals across multiple tax years (if feasible) can help reduce your tax bill significantly.
Dividend Allowance
For individuals who receive dividends, there is a dividend allowance that reduces the amount of dividend income subject to tax. The allowance often changes or is under review, so be sure to check the rates for the specific tax year in question. Properly timing dividend payments within or across tax years can optimise your dividend strategy.
3.1. Review and Use Your ISA Allowance
3.2. Maximise Pension Contributions
3.3. Harvest Gains or Losses
3.4. Organise Records and Documents
3.5. Review Your Business Affairs
If you are a business owner, make sure you have:
4.1. Marriage Allowance
Married couples or civil partners may be eligible for Marriage Allowance, which allows one partner with low or no income to transfer part of their personal allowance to the other. If you qualify, ensure the claim is in place before the tax year end, or you could miss out on backdated relief.
4.2. Tax-Efficient Investments
For those with the capacity to invest more aggressively, there are tax-incentivised schemes such as:
These can offer income tax relief and potentially generous capital gains tax benefits. However, they come with higher risk, so always seek professional advice or do extensive due diligence.
4.3. Gifting and Inheritance Tax (IHT) Planning
Individuals concerned about inheritance tax should consider utilising annual gift exemptions. Each person can give away up to a certain amount per year free of IHT implications (e.g., the annual £3,000 exemption). Gifts made out of normal expenditure might also be exempt. Reviewing these options before the end of the tax year can help reduce the value of your estate over time.
4.4. Charitable Donations
Charitable donations via Gift Aid can reduce your taxable income. Higher-rate taxpayers can also claim back the difference between higher-rate and basic-rate tax on the donation. This can be a useful tool in end-of-year tax planning.
Once 5 April has passed, your focus should shift to filing your Self Assessment tax return and paying any outstanding tax. Key dates to keep in mind:
Start Early for the New Tax Year
The UK tax year end on 5 April is more than just a date—it’s a critical planning milestone for individuals, businesses, and investors. By reviewing your financial situation, ensuring your allowances are fully used, and seeking professional advice when needed, you can streamline your tax obligations and potentially save a significant amount of money. Whether it’s topping up your ISA, contributing to your pension, or harvesting gains and losses, a proactive approach can yield considerable benefits.
After 5 April, don’t forget to file your return and settle any tax due, then reset your strategy for the new tax year. Good habits—like regular tracking, timely contributions, and staying informed about legislative changes—can turn the normally hectic tax-year deadline rush into a well-managed part of your broader financial strategy. It’s never too early to start preparing for the next tax year, so get your records in order, review your goals, and take full advantage of the reliefs and allowances available to you under UK law.