The end of the tax year is one of the most valuable planning points in the financial calendar.
The deadline on 5 April creates a clear window to review what has been used, what has been missed, and what can still be done. Many of the available allowances reset at the start of the new tax year. Unused opportunities do not carry forward in most cases.
A short, focused review can improve your long-term position without adding complexity.
This guide sets out the key areas to consider before the end of the 2025/26 tax year, along with practical steps to help you act with clarity.
What is the tax year end and why it matters
The UK tax year runs from 6 April to 5 April the following year.
The tax year end matters because it defines when allowances reset. Individual Savings Account (ISA) allowances, Capital Gains Tax (CGT) exemptions, and dividend allowances are all assessed within this timeframe.
Unused allowances are often lost once the deadline passes. This creates a “use it or lose it” position.
A structured review before the tax year end helps you:
- Reduce unnecessary tax
- Improve long-term investment efficiency
- Align your financial decisions with your wider plan
A well-timed decision can have a compounding impact over many years.
ISA allowance 2026: how to use it effectively
The ISA allowance for the 2025/26 tax year remains £20,000.
An ISA allows investments to grow free from income tax and capital gains tax. This creates a clean, efficient environment for long-term wealth building.
Key considerations for ISA planning
- Unused allowance does not carry forward
- Contributions can be made as a lump sum or in stages
- ISAs can hold cash or investments depending on your objectives
Practical example
An investor who consistently uses their ISA allowance each year builds a growing tax-free portfolio. Over time, this reduces reliance on taxable investments and simplifies future planning.
Common mistake
Leaving ISA contributions until the last minute often leads to inaction. A planned approach avoids rushed decisions and missed opportunities.
Pension contributions: tax relief and long-term planning
Pensions remain one of the most tax-efficient ways to invest.
Contributions benefit from tax relief at your marginal rate, subject to allowances. This means a £10,000 contribution may cost significantly less in real terms depending on your income tax position.
Key pension rules to review
- Annual allowance is typically £60,000, subject to tapering for higher earners
- Unused allowance from the previous three tax years may be carried forward
- Contributions are limited by your relevant earnings
Why pensions matter at tax year end
Pension contributions can reduce your taxable income. This may help:
- Avoid higher tax bands
- Retain personal allowances
- Reduce exposure to child benefit charges
Planning insight
Pension decisions should align with your long-term objectives. Tax efficiency is important, but access and flexibility also matter.
Capital Gains Tax: managing gains before the deadline
Capital Gains Tax applies when you sell investments or assets that have increased in value.
Each individual has an annual CGT allowance. For the 2025/26 tax year, this remains limited, making proactive planning more important.
How to use your CGT allowance
- Realise gains within the allowance to reduce future tax exposure
- Rebalance portfolios where appropriate
- Transfer assets between spouses to use both allowances
Example scenario
An investor with unrealised gains may choose to sell part of a holding to crystallise gains within the allowance. The proceeds can then be reinvested in a tax-efficient structure such as an ISA.
Key point
CGT planning works best when done regularly. Leaving it too late reduces flexibility.
Dividend and income allowances: small details that matter
Dividend income outside tax wrappers is subject to tax once it exceeds the annual allowance.
The allowance has reduced in recent years, which increases the importance of positioning assets efficiently.
What to review
- Dividend income from shares or funds held outside ISAs or pensions
- Interest from savings accounts
- Overall income relative to tax thresholds
Planning approach
Tax wrappers such as ISAs and pensions should be used first where possible. This reduces exposure to ongoing tax on income.
Gifting and inheritance tax planning
Gifting forms part of long-term estate planning.
The UK tax system allows certain gifts to be made each year without inheritance tax implications.
Key gifting allowances
- Annual exemption of £3,000 per individual
- Small gifts allowance of £250 per person
- Potentially exempt transfers for larger gifts
Why gifting matters
Gifting gradually reduces the value of an estate. Over time, this can lower inheritance tax exposure.
Important consideration
Gifting should not compromise your own financial security. Planning should balance generosity with long-term stability.
A simple tax year end checklist
A clear checklist helps focus attention on what matters.
Use this as a quick review before 5 April:
- ISA allowance reviewed and used where appropriate
- Pension contributions aligned with your income and goals
- Capital gains position assessed
- Dividend and income exposure understood
- Gifting allowances considered
Clarity matters more than complexity. A short review is often enough to identify meaningful actions.
Common tax year end mistakes to avoid
Mistakes at tax year end are usually avoidable.
Leaving decisions too late
Time pressure leads to rushed or missed actions. Early review creates better outcomes.
Focusing only on tax
Tax efficiency is important, but it should not override your wider financial plan.
Ignoring smaller allowances
ISA, CGT, and gifting allowances may seem modest in isolation. Over time, they create significant value.
Acting without a plan
Short-term decisions without context can create long-term issues. Structure matters.
Frequently asked questions
When is the tax year end in the UK?
The tax year ends on 5 April each year. The new tax year begins on 6 April.
Can I carry forward my ISA allowance?
No. ISA allowances must be used within the tax year. Unused amounts are lost.
How much can I contribute to a pension?
The standard annual allowance is £60,000, subject to earnings and tapering rules. Unused allowance from the previous three years may be available.
Do I need to act before the tax year end?
Not always. Some decisions benefit from timing. Others are better made as part of a longer-term plan.
Focus on what matters
The tax year end is a useful prompt, not a reason to rush.
Used well, it helps you make steady, considered improvements to your financial position. Missed opportunities rarely create immediate problems, but over time they can reduce efficiency.
A clear plan removes pressure. It allows you to act where it matters and ignore what does not.
At Becketts, we focus on structure, clarity, and long-term thinking. Tax year end planning is one part of that wider approach.
If you want to review your position before 5 April, we can help you focus on what is worth doing and why.
