Year-End Tax Planning Checklist UK (2026 Guide for Business Owners and Individuals)
As the UK tax year ends on 5 April, March is one of the most important planning windows in the calendar.
Once 6 April arrives, many tax-saving opportunities are lost permanently.
Whether you are:
- A limited company director
- A sole trader
- A landlord
- A higher-rate taxpayer
- Or running multiple income streams
a structured year-end review can reduce your tax bill legally and prevent unexpected liabilities.
This 2026 UK year-end tax planning checklist explains what to review before 5 April and why timing matters.
Why Year-End Tax Planning Matters
Tax planning is most effective before the tax year ends.
After 5 April:
- You cannot backdate pension contributions
- You cannot create additional dividend allowance
- You cannot use unused ISA allowance
- You cannot shift income into the previous tax year
- You cannot undo missed Capital Gains Tax opportunities
Year-end planning is about reviewing:
- Income levels
- Profit extraction
- Allowances
- Reliefs
- Timing of transactions
Personal Tax Year-End Checklist (Before 5 April 2026)
1. Use Your Personal Allowance
For 2025/26, the Personal Allowance is £12,570.
If your income is below this level:
- Consider whether dividends or salary can be taken before 5 April to utilise unused allowance.
If income exceeds £100,000:
- Consider pension contributions to preserve Personal Allowance where tapered.
2. Review Dividend Income
If you are a company director:
- Check how much dividend income you have taken.
- Ensure dividends are supported by distributable profits.
- Consider whether additional dividends should be declared before 5 April.
Dividend tax rates vary depending on your income band, so timing matters.
3. Pension Contributions
Pension contributions are one of the most effective year-end tax tools.
Before 5 April, consider:
- Whether you have unused annual allowance.
- Whether making a contribution could reduce higher-rate tax exposure.
- Whether employer contributions from your company are appropriate.
Pension contributions can reduce Income Tax and, in some cases, Corporation Tax.
4. ISA Allowance
The annual ISA allowance is £20,000 per individual.
If unused before 5 April:
- It cannot be carried forward.
Using ISA allowances shelters future gains and income from tax.
5. Capital Gains Tax (CGT) Allowance
For 2025/26, the CGT annual exemption is £3,000 per individual.
If you are considering selling:
- Shares
- Investments
- Crypto
- Property (not your main residence)
you may wish to review whether gains can be realised before 5 April to utilise the exemption.
Unused CGT allowance cannot be carried forward.
6. Spousal Transfers
Transfers between spouses are generally made at no gain/no loss for CGT purposes.
Before 5 April, review:
- Whether assets should be restructured to use both spouses’ allowances.
- Whether income-producing assets should be reallocated for tax efficiency.
7. Charitable Donations (Gift Aid)
Gift Aid donations:
- Extend your basic rate band.
- Can reduce higher-rate tax exposure.
If you are close to a higher-rate threshold, a charitable donation before 5 April may reduce overall tax.
Limited Company Year-End Tax Planning Checklist
If you operate through a limited company, your year-end planning may align with either:
- The tax year (5 April), or
- Your company’s accounting year-end.
Both should be reviewed.
1. Review Profit Level and Corporation Tax Exposure
For 2026, Corporation Tax rates remain:
- 19% for profits up to £50,000
- 25% for profits above £250,000
- Marginal relief between £50,000 and £250,000
If profits are approaching thresholds:
- Consider timing of expenditure.
- Consider pension contributions.
- Review bonus timing.
Small changes near the £50,000 and £250,000 limits can materially affect tax rates.
2. Director Salary and Dividend Mix
Before year-end, confirm:
- Salary has been processed correctly.
- Dividends are properly declared.
- Director’s Loan Account is not overdrawn.
An overdrawn Director’s Loan Account can trigger Section 455 tax at 33.75%.
Reviewing this before year-end avoids complications.
3. Capital Allowances and Asset Purchases
If your company is considering purchasing equipment:
- Timing the purchase before year-end may accelerate tax relief.
Capital allowance availability depends on asset type and eligibility.
However, purchases should be commercially driven, not purely tax-motivated.
4. Pension Contributions from the Company
Employer pension contributions:
- Reduce taxable profit.
- Can be highly tax-efficient for directors.
Ensure contributions are made before the company year-end to secure relief in that period.
5. Review Associated Companies
If you control multiple companies:
- Review whether associated company rules affect Corporation Tax thresholds.
Year-end restructuring should be considered carefully and professionally.
Sole Trader Year-End Checklist
If you are self-employed, your tax year aligns directly with 5 April.
Before year-end:
1. Review Profit Level
Estimate your taxable profit before 5 April.
If profits are higher than expected:
- Consider pension contributions.
- Consider timing of large purchases (where commercially appropriate).
2. Payments on Account Awareness
If your 2025/26 profit has increased significantly:
- Expect larger Payments on Account in January and July.
Planning early avoids cash flow pressure.
3. Business Expense Timing
Ensure:
- Legitimate expenses incurred before 5 April are recorded.
- Outstanding invoices are reviewed.
However, do not accelerate or delay income artificially without proper advice.
Landlord Year-End Checklist
For landlords:
1. Review Rental Profit
Estimate your rental profit before 5 April.
If you are close to higher-rate tax:
-
Consider pension contributions.
2. Mortgage Interest Restrictions
Remember that mortgage interest relief is restricted to a 20% tax credit for individual landlords.
Ensure this has been factored into planning.
3. Capital Expenditure vs Repairs
Repairs are deductible against income.
Improvements are capital and affect Capital Gains Tax later.
Correct classification is important.
High Earners and Personal Allowance Taper
If your income exceeds £100,000:
- Your Personal Allowance is reduced by £1 for every £2 above that threshold.
Effective marginal tax rates in this band can be very high.
Pension contributions before 5 April may restore allowance.
Child Benefit High Income Charge
If either parent earns over £50,000:
- Child Benefit may be clawed back via the High Income Child Benefit Charge.
Year-end income planning can mitigate this exposure in some cases.
Common Year-End Mistakes
We regularly see:
- Waiting until April
- Taking dividends without checking reserves
- Ignoring Director’s Loan Accounts
- Forgetting pension deadlines
- Not reviewing CGT exposure
- Overlooking ISA allowance
Year-end planning is most effective when reviewed at least one month before 5 April.
Simple Year-End Tax Planning Summary
Before 5 April 2026, review:
Personal:
- Personal Allowance usage
- Dividend levels
- Pension contributions
- ISA allowance
- CGT allowance
- Spousal planning
- Gift Aid
Business:
- Profit level
- Corporation Tax band
- Director remuneration
- Pension contributions
- Capital allowances
- Director’s Loan Account
Landlords:
- Rental profit
- Mortgage interest restriction
- Capital expenditure classification
How Merranti Accounting Can Help
At Merranti Accounting, we support individuals and business owners with structured year-end reviews tailored to their circumstances.
We can help you:
- Estimate your 2025/26 tax position before 5 April
- Review dividend and salary strategy
- Assess Corporation Tax exposure
- Check Director’s Loan Accounts
- Identify pension planning opportunities
- Review Capital Gains exposure
- Ensure compliance with Companies House and HMRC
Year-end planning is not about aggressive tax avoidance. It is about:
- Using available allowances
- Timing transactions correctly
- Avoiding unnecessary tax
- Preventing penalties
Final Thoughts
Year-end tax planning in the UK is time-sensitive.
After 5 April, many opportunities disappear permanently.
A structured review before the tax year ends can reduce tax legally, improve cash flow, and provide clarity going into the new year.
If you are unsure whether you are making full use of available allowances, a year-end review well before 5 April is advisable.
Individual circumstances vary, and advice should always reflect your specific income structure and business profile.
