How to Reduce Corporation Tax Legally in the UK

Every limited company director wants to keep more of their hard-earned profits. The good news is that there are several legitimate strategies approved by HMRC that can significantly reduce your corporation tax bill.

As of April 2024, the main rate of corporation tax in the UK stands at 25% for companies with profits over £250,000, with a small profits rate of 19% for companies earning under £50,000. That means tax planning is more important than ever.

1. Claim All Allowable Business Expenses

The simplest way to reduce your taxable profit is to ensure you are claiming every legitimate business expense. Many directors miss deductions they are entitled to. Common allowable expenses include:

• Office costs — rent, utilities, internet, phone bills
• Travel expenses — business mileage, public transport, accommodation
• Staff costs — salaries, pensions, training, recruitment fees
• Professional services — accountancy fees, legal costs, insurance
• Marketing — website hosting, advertising, business cards, software subscriptions

Keep meticulous records and receipts. HMRC can request evidence for any expense claimed, so a well-organised filing system is essential.

2. Utilise Capital Allowances

When your company purchases assets such as equipment, vehicles, or machinery, you can claim capital allowances to offset the cost against your profits.

The Annual Investment Allowance (AIA) lets you deduct the full value of qualifying assets up to £1 million per year. This is a powerful tool for companies making significant capital investments.

Additionally, the full expensing regime introduced in 2023 allows companies to deduct 100% of qualifying plant and machinery expenditure from their taxable profits in the year of purchase.

3. Research and Development Tax Credits

If your company is involved in innovation or problem-solving, you may be eligible for R&D tax credits. This scheme is not just for tech companies — it applies to any business that seeks to advance knowledge or capability in its field.

Under the merged R&D scheme (from April 2024):

• Companies can claim an enhanced deduction of 186% on qualifying R&D expenditure
• Loss-making companies can claim a tax credit of up to 14.5%

Common qualifying activities include developing new products, improving existing processes, and creating bespoke software solutions.

4. Pension Contributions

Employer pension contributions are a tax-deductible business expense. By making contributions to a director's or employee's pension scheme, your company can reduce its taxable profits while simultaneously building a retirement fund.

There is no cap on employer contributions, though they must pass HMRC's "wholly and exclusively" test. The annual allowance for pension contributions is currently £60,000 per individual.

5. Salary vs. Dividends Strategy

While this is more about personal tax planning, the way you extract money from your company matters. Many directors pay themselves a small salary (around the National Insurance threshold) and take the rest as dividends, which are taxed at lower rates.

For 2024/25:

• Basic rate dividend tax: 8.75%
• Higher rate dividend tax: 33.75%
• Additional rate dividend tax: 39.35%

This is significantly lower than income tax and National Insurance on equivalent salary payments.

6. Timing Your Expenses and Income

Strategic timing can make a real difference. Consider:

• Bringing forward expenses into the current tax year
• Deferring income to the next tax year if you expect to be in a lower bracket
• Making large purchases before your year-end to benefit from capital allowances sooner

7. Charitable Donations

Donations to registered charities are fully deductible against corporation tax. This includes cash donations, equipment, and even sponsorship arrangements.

Key Takeaways

• Claim everything you are entitled to — expenses, allowances, and reliefs
• Plan ahead — tax planning should be a year-round activity, not a year-end scramble
• Keep records — thorough documentation protects you in case of an HMRC enquiry
• Seek professional advice — a good accountant will more than pay for themselves in tax savings

By implementing these strategies consistently, most UK limited companies can achieve meaningful reductions in their corporation tax bills while remaining fully compliant with HMRC regulations.

This article is for informational purposes only and does not constitute tax advice. Always consult a qualified accountant for advice specific to your circumstances.