Last-Minute Tax Savings Before April 5, 2026: 12 Moves for the Self-Employed

1. Maximise Your Pension Contributions

Personal pension contributions are the single most powerful tax-saving tool for the self-employed. Every pound you contribute reduces your taxable income by the same amount.

How it works:

• You can contribute up to £60,000 per year (or 100% of your earnings, whichever is lower)
• You get tax relief at your highest marginal rate — 20%, 40%, or 45%
• Carry forward: You can use unused allowance from the previous 3 tax years (2022/23, 2023/24, 2024/25)

Example: A sole trader earning £55,000 who contributes £5,000 to a personal pension before April 5 saves £2,000 in income tax (40% relief on the amount that falls in the higher-rate band).

2. Buy Business Equipment You Need (Capital Allowances)

If you need business equipment — a laptop, desk, camera, software, tools — buy it before April 5. Under the Annual Investment Allowance (AIA), you can deduct 100% of the cost in the year of purchase.

What counts:

• Computers, laptops, tablets
• Office furniture (desk, chair, monitor)
• Professional tools and equipment
• Software licences (annual, not monthly subscriptions)
• Vehicles (partial — see separate rules)

Example: Buying a £1,500 laptop before April 5 saves you £300 in tax at 20%, or £600 at 40%.

3. Claim Working From Home Relief

If you work from home (most freelancers do), you can claim a deduction for home office costs. There are two methods:

Simplified expenses (no receipts needed):

Proportional method (needs records, usually gives more): Calculate the percentage of your home used for business and the proportion of time, then apply that to your mortgage interest/rent, utilities, council tax, and broadband.

Example: If you use one room of a four-room house exclusively for work, 25% of your utility and broadband bills are deductible. On annual costs of £4,000, that's a £1,000 deduction — saving £200-£400 in tax.

Full guide: Working from home tax relief for the self-employed

4. Check Trading Allowance vs Actual Expenses

The trading allowance gives you a £1,000 tax-free amount. If your self-employed income is low (especially side-hustle income alongside employment), using the trading allowance might save you more than claiming actual expenses.

The rule: You can either claim the £1,000 trading allowance OR deduct your actual expenses — not both. Do the maths:

• If your actual expenses are less than £1,000 → use the trading allowance
• If your actual expenses exceed £1,000 → claim actual expenses

This mainly benefits people with a small side income. If you're earning £30k+ from self-employment, your actual expenses almost certainly exceed £1,000.

5. Transfer Marriage Allowance

If you're married or in a civil partnership, and one partner earns less than £12,570 (doesn't use their full personal allowance), they can transfer £1,260 to the other partner. This saves the higher earner £252 in tax.

How to claim: Apply at gov.uk/marriage-allowance. Takes 5 minutes. You can backdate it up to 4 years.

The catch: The higher earner must be a basic rate taxpayer (earning under £50,270). Higher-rate taxpayers don't qualify.

6. Claim Every Mile You've Driven for Business

If you drive for business (client meetings, site visits, equipment pickups), you can claim 45p per mile for the first 10,000 miles, and 25p per mile after that.

Action before April 5: Go through your diary/calendar for the whole of 2025/26 and reconstruct your mileage log. Note the date, destination, purpose, and miles for each business journey.

Example: A plumber driving 15,000 business miles can deduct £5,750 (10,000 × 45p + 5,000 × 25p). At 20% tax, that saves £1,150.

Full guide: Self-employed mileage allowance UK

7. Bring Forward Expenses / Defer Income

If your income is near a tax band threshold, timing matters:

• Pay expenses before April 5 — annual software subscriptions, professional memberships, insurance renewals. If you'd pay them in April anyway, pay them now and deduct them in 2025/26.
• Defer invoicing if possible — if you haven't invoiced for March work yet, sending the invoice after April 5 means the income falls into 2026/27 instead (cash basis accounting).

8. Claim Professional Subscriptions and Memberships

Professional body memberships and subscriptions are often forgotten. If you haven't claimed them, add them up:

• Professional body memberships (RICS, CIMA, ACCA, ACE, etc.)
• Trade union subscriptions
• Industry publications and journals
• Professional development courses directly related to your work
• Specialist software subscriptions used for work

If you've been paying for these but not claiming them, you may be able to backdate.

9. Make Charitable Donations (Gift Aid)

If you're a higher-rate taxpayer and make charitable donations under Gift Aid, you can claim the difference between basic rate and higher rate relief through your Self Assessment. The charity gets 25% extra, and you can claim back an additional 20%.

Example: A £1,000 Gift Aid donation by a 40% taxpayer saves £250 in additional tax relief (£500 minus the £250 claimed by the charity).

Don't donate just for the tax break — but if you were planning to donate, do it before April 5.

10. Review Your Mobile Phone and Broadband Split

If you use your personal phone and broadband for work, you can claim a proportion of the cost. Many freelancers don't bother — but it adds up:

• Mobile: Claim the business-use percentage. If 50% of your calls and data are work-related, claim 50% of the bill.
• Broadband: Similarly, estimate the work-use proportion.

On a combined annual cost of £900, claiming 50% gives you a £450 deduction — saving £90-£180 in tax.

11. Claim Training and CPD Costs

Training costs that maintain or update your existing skills are deductible. This includes:

• Online courses related to your current work
• Conference attendance fees
• Books and resources for your profession
• Professional certification renewals

12. Use Your ISA Allowance (Not a Tax Deduction, But…)

This doesn't reduce your Self Assessment bill, but it's a crucial tax-year-end move. You can put up to £20,000 into ISAs before April 5. Any investment growth or interest inside an ISA is completely tax-free — forever.

If you've had a profitable year and have cash to spare after covering your tax bill, putting money into an ISA before April 5 protects future growth from tax. This allowance doesn't carry over — use it or lose it.