How to Reduce Your Self-Assessment Tax Bill: 8 Unique Tax-Busting Tips 💸
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As the self-assessment deadline approaches, many people face the same challenge: large tax bills. But there’s good news—you can take practical steps to reduce your tax liability. Some of these tips may surprise you, as they go beyond the usual advice about pensions and ISAs. Let’s explore eight unique ways to lower your self-assessment tax bill.
1. Mileage Claims 🚗
If you use your personal car for business, you can claim tax relief on mileage. Here’s how it works:
45p per mile for the first 10,000 miles.
25p per mile for any additional miles.
What makes this tip unique is that the mileage allowance applies per company. So, if you work for multiple unassociated companies, you can claim mileage for each.
Example Calculation:
If you drive 12,000 miles for a company:
First 10,000 miles: 10,000 x 45p = £4,500.
Remaining 2,000 miles: 2,000 x 25p = £500.
Total claim: £5,000.
Bonus Tip:
If you’re VAT-registered, your company can claim VAT on the fuel receipts for your business mileage. This can save anywhere from 7p to 24p per mile. Keep accurate records to maximize your claim.
2. Gift Aid Contributions 🎁
Donating to a registered charity is not only rewarding but can also lower your tax bill. Here’s how it works:
Donate £800, and the charity claims £200 from the government.
As a higher-rate taxpayer, you can claim another £200 on your tax return.
This means your £800 donation effectively costs you only £600.
3. Transfer Beneficial Ownership of Rental Property 🏠
If you own rental property, you can save tax by transferring beneficial interest to a spouse in a lower tax band. This allows the rental income to be taxed at a lower rate. The process involves:
Creating a Deed of Trust.
Filing Form 17 with HMRC.
Example:
If rental income is £12,000 per year:
Taxed at 40%: £12,000 x 40% = £4,800 tax.
Transferred to a spouse in the 20% bracket: £12,000 x 20% = £2,400 tax.
Savings: £2,400 annually.
Key Point:
This transfer doesn’t change the ownership ratio for capital gains tax when selling the property. It only affects how the rental income is taxed.
4. Consider a Limited Company Structure 🏢
If you’re self-employed and earning over £50,000, it might be time to operate as a limited company. Benefits include:
Paying corporation tax (25%) instead of higher personal tax rates.
Taking income as a combination of salary and dividends, which is often more tax-efficient.
Example Calculation:
If your profit is £70,000:
As self-employed: £70,000 x 40% = £28,000 tax.
As a limited company: Corporation tax (25%): £70,000 x 25% = £17,500.
Savings: £10,500 annually.
For consultants, medics, or professionals with private income streams, this can result in significant savings.
5. Employ Family Members 👨👩👧👦
If your spouse or children help with your business (e.g., admin tasks, website management), put them on the payroll. This reduces your taxable profits while providing them with an income.
Spouses with no other income may qualify for state benefits by being on the payroll.
Ensure their salary reflects market rates to stay compliant with HMRC rules.
Example:
Pay your spouse £12,570 per year (tax-free personal allowance):
Tax saving on £12,570 at 40%: £5,028 saved.
Your spouse also builds state pension contributions.
6. Salary Sacrifice Schemes 💼
Salary sacrifice lets you reduce taxable income in exchange for non-cash benefits like:
Increased pension contributions.
Access to a company car scheme (e.g., electric vehicles).
Childcare vouchers.
Example:
If you earn £60,000 and sacrifice £10,000 into a pension:
Taxable income reduces to £50,000.
Saves income tax (40%) and NIC (2%): £4,200 saved.
This strategy is especially useful for avoiding the Child Benefit Tax Trap if your income exceeds £50,000.
7. Claim Professional Expenses 📄
Many professionals don’t realize they can claim back costs for:
Membership fees (e.g., GMC, Law Society).
Training courses.
Uniforms or work-specific clothing.
Did You Know?
You can backdate these claims for up to four years. For example, a doctor reclaimed £3,500 in missed deductions, generating a substantial tax refund.
8. Electric Vehicle Incentives ⚡
Switching to an electric car can save you money thanks to the low Benefit-in-Kind (BiK) tax rate of 2% (valid until 2025). This works well if:
You lease the vehicle through a salary sacrifice scheme.
You run your own limited company and purchase the car as a business expense.
Example:
Lease an electric car worth £40,000:
BiK tax (2%): £40,000 x 2% = £800 taxable benefit.
Tax at 40%: £800 x 40% = £320 tax annually.
Compare this to traditional vehicles with BiK rates of 25% or more.
FAQ
Q: Can I combine these tips for maximum savings?
A: Absolutely! For example, you can operate as a limited company, employ family members, and use salary sacrifice schemes simultaneously to optimize your tax strategy.
Q: How do I know if a limited company structure is right for me?
A: If your profits exceed £50,000, it’s worth consulting with an accountant to explore the benefits.
Q: Can I claim expenses if I’m employed full-time?
A: Yes! If you pay for work-related costs like professional memberships or uniforms out-of-pocket, you can claim these even if you’re employed.
Summary Table
| Tip | Benefit | Notes |
|---|---|---|
| Mileage Claims 🚗 | Reduce taxable income and reclaim VAT on fuel. | Accurate record-keeping is essential. |
| Gift Aid Contributions 🎁 | Higher-rate taxpayers save additional tax on donations. | This only applies to registered charities. |
| Beneficial Ownership Transfers 🏠 | Shift rental income to a lower-taxed spouse. | Requires Form 17 and a Deed of Trust. |
| Limited Company Structure 🏢 | Pay less tax on higher incomes. | Consult an accountant for tailored advice. |
| Employ Family Members 👨👩👧👦 | Reduce profits while paying family members for legitimate work. | Salaries must align with market rates. |
| Salary Sacrifice 💼 | Reduce income tax and NIC while gaining valuable benefits. | May impact state benefit entitlements. |
| Claim Professional Expenses 📄 | Generate refunds for overlooked costs. | Backdate claims up to four years. |
| Electric Vehicle Incentives ⚡ | Save on BiK tax and reduce business costs. | Valid until April 2025. |
Final Thoughts
These eight tax-busting tips can help you significantly reduce your self-assessment tax bill. Whether it’s maximizing mileage claims, exploring salary sacrifice schemes, or restructuring your income through a limited company, these strategies offer real savings.
For personalised advice, get in touch with MA & CO Accountants. We’ll ensure you make the most of every tax-saving opportunity. Start saving today!

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