On 6 April, a new tax year will start. This date marks the expiration of many allowances and the arrival of new ones. For those who act early in 2026/27, it could make a significant difference to your long-term financial position.
Research shows that most people make most of their ISA contributions and pension top-ups in the final weeks before the April deadline. Whilst this is better than inaction, it leaves the earlier months of the tax year largely unused.
With the new tax year here, you have the opportunity to do things differently - starting well and building a habit of using your allowances. The benefit? You can maximise the time your money has to grow, making sure you are not scrambling to use allowances at the last minute.
In this article, our financial planners at Castlegate set out the key steps to take in the opening weeks of the new tax year, and why acting early can pay you back.
There is a simple reason why early action beats late action: time in the market.
If you invest your full ISA allowance on 6 April rather than 5 April the following year, that money has 12 extra months to grow. Over the years, the compounding effect of those extra months can meaningfully add to your overall returns.
The same holds for pension contributions. The sooner money is invested inside a pension wrapper, the longer it benefits from tax-free growth. With the annual pension allowance standing at £60,000 (or 100% of earnings, whichever is lower) for most people in 2026/27, there is real value in front-loading contributions where your circumstances allow.
Early action also reduces decision-making pressure. The “end of tax year rush” is one of the most common reasons people make hasty financial decisions or miss allowances altogether. Starting in April gives you the full year to be thoughtful and deliberate.
On 6 April 2026, your ISA allowance refreshes (£20,000 per adult). It’s one of the most valuable tax-free shelters available to UK savers and investors, but a significant proportion of people do not use it fully each year.
Within a Stocks and Shares ISA, all returns - whether capital gains, dividends or income - are sheltered from their respective taxes. Cash ISAs can be useful for shorter-term goals or as an emergency fund carrier. However, savers should keep a close eye on interest rates as the Bank of England's rate environment continues to evolve.
The Lifetime ISA is worth revisiting for those aged 18 to 39. The government adds a 25% bonus on contributions each year (up to £4,000), so it remains one of the most generous incentives available for first-time buyers or retirement savers who meet the eligibility criteria.
Junior ISAs are another area to review at the start of the tax year. These allow contributions of up to £9,000 per year per child. Contributing early maximises the long-term growth potential for your children or grandchildren.
The pension annual allowance also refreshes at the start of 2026/27. This stands at a maximum of £60,000 per tax year (or up to 100% of your earnings - whichever is lower).
This is a significant opportunity for those who have the capacity to contribute. Even if you cannot use your full allowance this year, reviewing your current contribution level is a valuable exercise for building a healthy future retirement income.
One area that catches many people off guard is the interaction between pension contributions and the tapered annual allowance. This applies to high earners with adjusted income above £260,000. If this affects you, careful planning at the start of the year - rather than reactive adjustments in March - is essential.
For business owners and the self-employed, the start of the tax year is a good time to review the balance between salary, dividends and pension contributions. This allows much more time to optimise your overall tax position.
The inheritance tax (IHT) landscape has been shifting since the 2024 Autumn Budget, when new upcoming pension rules were announced.
An important one is on the horizon: unused pension funds are planned to be subject to IHT for those who die on or after 6 April 2027. This marks a significant shift from the current position, where pension funds largely fall outside a person's estate.
For anyone who has relied on pensions as part of their estate planning strategy, reviewing that approach early in the 2026/27 tax year is important. There is still time to adjust your plans before the new rules take effect, but the window is narrowing.
Annual gifting allowances also reset at the start of the tax year. The annual exemption of £3,000 per person, the small gifts exemption of £250 per recipient, and the normal expenditure out of income rules are all available from 6 April. Using these systematically over several years can make a meaningful impact on the size of an estate.
At Castlegate, we help clients make the most of each tax year through proactive, structured financial planning.
Whether you are looking to maximise your ISA, review your pension or prepare for the forthcoming changes to inheritance tax, tailored advice ensures you make the right decisions for your circumstances and goals.
If you would like a no-obligation review to make the most of the new tax year, please call to speak to our team for a free consultation and review of your current position.
Your capital is at risk. Investments can go down as well as up, and you may not get back the amount you originally invested. Past performance is not indicative of future results. Diversification does not guarantee profits or fully protect against losses. Tax treatment depends on individual circumstances and may change in the future. This content is for information only and does not constitute personal financial advice. Readers should seek independent financial advice before making any investment decisions.
Castlegate Financial Management Limited is registered in England No. 2077374. Registered Office: 8 Castlegate, Grantham, Lincolnshire. NG31 6SE. Authorised and Regulated by the Financial Conduct Authority. FCA No. 169777.
