How to reduce your Corporation Tax, legally
Written by Akhtar Rana, FAIA · Last reviewed
You can reduce your Corporation Tax legitimately by claiming every allowable expense and capital allowance, making employer pension contributions, taking a tax-efficient salary, checking whether you qualify for R&D relief, timing purchases before your year end, and using loss reliefs. It’s about using the reliefs that already exist, not anything artificial, and most of the saving comes from planning ahead rather than reacting after the year has closed.
Reliefs depend on your circumstances. Always check GOV.UK or speak to us before acting.
The legitimate levers, in plain terms
- Employer pension contributions. Company contributions into your pension are usually an allowable expense, so they cut the company’s profit and its tax, while building your retirement fund. One of the most effective and underused moves for company directors.
- A tax-efficient salary. Your salary is a deductible cost for the company. Set at the right level, with dividends on top, it keeps the overall (company plus personal) tax as low as it legitimately goes.
- Capital allowances. Claim the Annual Investment Allowance (100% on up to £1 million of qualifying equipment) and full expensing on new main-rate plant and machinery. A profitable year with genuine investment can see the tax drop sharply.
- R&D tax relief. If your company develops products, software or processes and takes a technical risk, you may qualify for extra relief. Many eligible companies (not just labs and tech firms) simply never claim.
- Timing. Bringing a genuine, planned purchase or pension contribution forward before your year end moves the relief into the current year. Timing is legitimate; inventing costs is not.
- Every allowable expense. The small recurring ones (subscriptions, use of home, mileage, professional fees) add up over a year and are easy to miss without good bookkeeping.
- Employing family genuinely. Paying a spouse or family member a commercial wage for real work is a legitimate cost. It must be genuine and properly documented.
- Loss relief. If you make a loss, it can often be carried back or forward to reduce tax in another year, so a bad year isn’t wasted.
The mindset that saves the most
Almost all of this depends on acting before your year end, not after. The single biggest difference between companies that overpay and those that don’t is having an accountant who plans ahead and tells you what to do while you can still do it. That is exactly how we work.
Want us to look for savings you might be missing? Take our 2-minute quiz, or read allowable expenses and capital allowances next.
Akhtar Rana, FAIA
Akhtar is the founder of Xpert Tax Accountants and a Fellow of the Association of International Accountants, holding an AIA practising certificate. He works with business owners across Greater Manchester and the rest of the UK.
Verify his membership on the AIA register →
Xpert Tax Accountants is regulated by the AIA. We are not authorised by the Financial Conduct Authority and do not give investment, pension or insurance advice.
Xpert Tax Accountants is regulated by the Association of International Accountants. We are not authorised or regulated by the Financial Conduct Authority and we do not give investment, pension or insurance advice, or arrange financial products. Our content is general information about UK tax, not advice for your circumstances, and no responsibility is accepted to any person acting on the basis of it.
Frequently asked questions
Common questions about cutting your Corporation Tax bill.
How can I legally reduce my Corporation Tax?+
By claiming all allowable expenses and capital allowances, making employer pension contributions, taking an efficient salary, checking for R&D relief, timing purchases before year end, and using loss reliefs. It’s about using existing reliefs, and planning ahead is where most of the saving is.
Are pension contributions tax deductible for my company?+
Employer pension contributions are usually an allowable business expense, so they reduce your company’s profit and Corporation Tax, subject to the rules. It’s one of the most effective options for directors.
Can my company claim R&D tax relief?+
Possibly. If you develop products, software or processes and take a genuine technical risk, you may qualify, and it isn’t limited to tech or science firms. We assess whether you’re eligible.
When should I buy equipment to save tax?+
Genuine, planned purchases made before your year end move the capital allowance into the current year. The timing must reflect real business need, not an invented cost.
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