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With the UK corporation tax rate now at 25% for companies with annual profits over £250,000, and a small profits rate of 19% for those earning up to £50,000, business owners are under increasing pressure to manage their tax affairs efficiently. Marginal relief applies for profits between £50,001 and £250,000, providing a sliding scale between the two rates. The good news: there are numerous HMRC-approved strategies on how to reduce corporation tax bill legally, maximise post-tax profit, and improve your business liquidity.
In this guide, discover 11 expert-backed, fully compliant ways to reduce corporation tax in 2026, covering:
- Strategic timing of expenditure and tax-efficient profit extraction
- Maximising allowable deductions and capital allowances
- Claiming R&D tax credits and Creative Industry reliefs
- Using pension contributions and salary planning
- Group relief for losses, Patent Box, and EMI schemes
What is Corporation Tax and How Much You Have to Pay?
Corporation tax is a direct tax on the taxable profits of UK limited companies, foreign companies with a UK branch, and certain unincorporated associations. Taxable profits include trading income, investment returns, and chargeable gains from the sale of business assets. All profits are taxable-there’s no tax-free allowance for companies.
| Profit Level | Rate | Notes |
| Up to £50,000 | 19% (Small Profits Rate) | Full rate applies |
| £50,001 – £250,000 | 19% – 25% (Marginal Relief) | Sliding scale applies |
| Over £250,000 | 25% (Main Rate) | Full main rate |
Important: Marginal Relief provides a gradual increase from 19% to 25% for profits between £50,001 and £250,000. This means a company with £150,000 profit does not simply pay 25%, it pays a blended effective rate calculated using the standard marginal relief fraction.
11 Legal Ways to Reduce Your Corporation Tax Bill
1. Maximise Allowable Deductions and Legitimate Business Expenses
Claiming every allowable business expense is the most straightforward way to reduce your taxable profit and your corporation tax bill. Every legitimate expense you fail to claim is money unnecessarily handed to HMRC.
Here is why it matters: If you spend £5,000 on new equipment but forget to claim the capital allowance, your profits could be overstated by £5,000, costing you up to £1,250 in extra corporation tax at the main rate. Small amounts add up too. Recording every £2 notepad or £3 bus fare across a full year can represent meaningful tax savings.
Expenses must be incurred wholly and exclusively for business purposes to qualify under HMRC rules. There are no blanket rules on what can or cannot be claimed, what seems like a luxury for one business may be a legitimate necessity for another, depending on the nature of the trade.
Claim all deductible business expenses incurred wholly and exclusively for business purposes, such as:
- Employee wages and Employer contributions (including pension scheme payments)
- Office supplies, office equipment, and administrative costs
- Business travel costs, business mileage, and accommodation costs
- Marketing, advertising, and professional advice fees
- Professional insurance premiums and income protection policies
- Subscriptions to industry-relevant publications or membership bodies
- Mobile phones and communication costs used for business
Accurate records are essential for every eligible business expense to withstand HMRC scrutiny. Using cloud accounting software to capture receipts at point of purchase makes this process far more manageable.
2. Utilise Capital Allowances and Full Expensing
Investing in business assets such as machinery, IT equipment, and business vehicles can unlock significant tax relief through capital allowances. Rather than simply depreciating assets in your accounts, capital allowances let you deduct qualifying expenditure directly from taxable profits.
Worked Example: Your company has taxable profits of £1,000,000. You spend £400,000 on qualifying plant and machinery. Using the Annual Investment Allowance, the full £400,000 is deducted, reducing taxable profits to £600,000, saving £100,000 in corporation tax at the 25% rate.
- Electric vehicles: 100% allowance for zero-emission business cars and charging points until March 2026
- Full expensing: 100% first-year relief on qualifying plant and machinery investments, with no upper limit, as of April 2023.
- Annual Investment Allowance (AIA): Deduct up to £1 million of qualifying capital expenditure per accounting period.
- Special Rate Assets (50% First Year Allowance): Assets classified as special rate most commonly features within buildings, such as electrical systems, heating, and air conditioning qualify for a 50% first-year allowance rather than the standard 6% writing down allowance.
- Super-deduction allowance: Enhanced tax relief of up to 130% on certain plant and machinery purchases (for eligible companies).
Important caveat: Full expensing and AIA provide upfront tax relief by reducing taxable profits, but they do not reduce Capital Gains Tax or chargeable gains liabilities on the eventual disposal of assets. Specialist capital allowances reviews often uncover significant additional claims that generalist accountants miss, particularly for property fit-outs and refurbishments.
3. Claim Research & Development (R&D) Tax Credits
R&D tax credits are among the most valuable and most underutilised corporation tax reliefs available to UK companies. Many businesses mistakenly believe R&D relief is only for large tech firms. In reality, if your company is paying people to solve technical or scientific problems, you may well qualify.
Activities that can qualify include:
- Modifying or improving a manufacturing process
- Developing bespoke software or internal systems
- Creating a new product or improving the performance of an existing one
- Overcoming a technical uncertainty in an engineering or design project
| Concrete Example: An SME incurring £100,000 of qualifying R&D costs can generate an additional tax saving of approximately £21,000 above the standard deduction. For loss-making companies, a cash repayment may be available from HMRC instead providing real liquidity even before the company turns profitable. |
- SMEs: Deduct up to 186% of qualifying R&D costs, or claim a cash tax credit if loss-making.
- Large companies: Claim a 20% taxable credit via the R&D Expenditure Credit (RDEC) scheme.
- Retrospective claims: Claims can be submitted for up to two prior accounting periods first-time claimants can look back at recent years for significant additional savings.
4. Creative Industry Tax Reliefs
Eligible companies in film production, animation television, video games, and other creative sectors can claim sector-specific corporation tax relief:
Relief applies to a range of business activities, including theatrical productions and gallery exhibitions.
Up to 25% payable cash rebate on UK-qualifying production expenditure.
5. Deduct Charitable Donations
Charity donations to registered charities-whether cash, trading stock, or equipment-are deductible from your business profits, reducing your corporation tax liability and supporting your corporate social responsibility goals.
6. Group relief for losses
If your company is part of a group, you can offset losses from one eligible company against the profits of another within the same group structure, reducing the overall group tax charge. This is especially valuable for groups with fluctuating annual profits.
What qualifies as a group? Generally, one company must hold a majority of the voting rights in the other, or both must be controlled by a common third party. The surrendering and claimant companies must be within the same group for the relevant accounting period.
For losses arising from April 2017 onwards, the rules provide considerably more flexibility. Key planning points:
- Offsetting across the group: A profitable subsidiary’s tax charge can be reduced by losses surrendered from a loss-making sister company, improving the group’s overall cash position.
- Cash repayment in some cases: In certain circumstances, losses can be surrendered to HMRC in return for a cash payment rather than waiting to offset them against future profits.
- Timing of relief matters: With different CT rates potentially applying to different tax years or group companies, the timing of when relief is taken can significantly affect the overall tax saving. Planning should target the year with the highest effective rate.
All companies with tax losses should review the most tax-efficient method of obtaining relief opportunities are regularly missed without specialist advice
7. Pay Salaries and Employer Pension Contributions
Paying directors and employees a salary is an allowable expense. Employer pension contributions to an approved company pension scheme are also deductible, offering a tax-efficient way to reward staff and reduce taxable profits
Salary vs. Dividends: Which is More Tax-Efficient?
Many director-shareholders pay themselves a combination of salary and dividends. The table below shows the combined effective tax rates for different income types across the three main tax bands (illustrative from April 2024 seek bespoke advice):
| Income Type | Basic Rate (%) | Higher Rate (%) | Additional Rate (%) | CT Deductible? |
| Salary / Bonus | 36.7% | 49% | 53.4% | Yes |
| Dividends | 31.6% | 50.3% | 54.5% | No |
| Pension Contributions | 0% | 0% | 0% | Yes |
| Rent Received | 20% | 40% | 45% | Yes |
| Interest | 20% | 40% | 45% | Yes |
Key insight: Salaries and pension contributions reduce corporation tax because they are deductible, whereas dividends do not, as they are paid from post-tax profits. However, dividends are taxed at lower personal tax rates for higher-rate taxpayers. The optimal mix depends on your personal tax situation, the company’s profitability, and other sources of income
Additional planning strategies:
- Pension annual allowance carryforward: Unused annual allowances from the previous three tax years can be carried forward, allowing larger one-off company pension contributions that generate significant CT relief.
- Spouse or family member salaries: Paying a spouse a salary for genuine work performed in the business makes use of their personal allowance and basic rate bands reducing both corporation tax and the household tax burden.
- Dividend reclassification risk: Dividends must be paid from demonstrable distributable profits. If HMRC determines they were paid without sufficient profits, they may be reclassified as salary triggering Income Tax and National Insurance. Always ensure management accounts support any dividend payment.
8. Time Your Expenditure Strategically
Plan the timing of significant purchases, such as business vehicles or office equipment towards the end of your accounting period to maximise allowable expenditure and reduce your taxable profit for that period.
For example, if your company is approaching a year-end with unexpectedly high profits, accelerating a planned capital purchase into that period may reduce an otherwise large tax bill. Conversely, if profits are low and you expect higher profits next year, deferring expenditure may generate relief at a higher effective rate.
9. Employee Share Schemes (EMI Schemes)
Implementing an Enterprise Management Incentives (EMI) scheme lets you reward key employees with shares. The company can claim a tax deduction on the difference between the market value and the price paid by employees, reducing corporation tax and improving retention.
- Corporation tax deduction: The company can claim a CT deduction equal to the difference between market value at exercise and the price paid by the employee directly reducing taxable profits.
- Retention and alignment: Employees know they will share in the company’s growth if they stay and perform a powerful tool for aligning interests ahead of a company sale or exit.
- Tax-efficient on exit: EMI options typically qualify for Business Asset Disposal Relief, meaning gains on eventual share sales may be taxed at just 10% rather than the full CGT rate.
10. Leverage the Patent Box Regime
The Patent Box regime allows UK companies to pay a reduced corporation tax rate of just 10% on profits derived from patented inventions and qualifying intellectual property compared to the standard 25% main rate, a saving of 15 percentage points on qualifying income.
The regime is particularly valuable for businesses in technology and software, pharmaceuticals, manufacturing, engineering, medical devices, and R&D-focused sectors.
To qualify, the company must own licence or a granted patent from the UK IPO, the European Patent Office, or certain other qualifying territories, and must have undertaken qualifying development work in connection with the patent.
11. Optimise Tax Relief for Losses
Companies that have incurred tax losses should actively manage how and when relief is claimed rather than simply carrying losses forward. The timing and type of relief can materially improve your tax position.
- Carry-back of losses: Trading losses can generally be carried back one year (or three years for losses in the final year of trading), generating a repayment of corporation tax already paid.
- Carry-forward flexibility: Post-April 2017 losses can be used more flexibly against total profits in future periods, providing greater scope for efficient relief.
- Terminal loss relief: A company ceasing to trade may carry back losses from its final 12 months against profits of the preceding three years potentially generating a significant repayment.
Rate arbitrage within groups: Where different CT rates apply across years or group companies, timing loss relief to the highest-rate year maximises the overall saving
Why Seek Professional Advice?
The UK tax system is a complicated subject, with frequent changes to tax deduction rules, relief for capital expenditures, and compliance requirements. Professional advice from an experienced accountant ensures you claim all available tax credits, comply with anti-avoidance rules, and structure your business for maximum tax efficiency
Frequently Asked Questions
Who Needs to Pay Corporation Tax in the UK?
In the UK, Corporation Tax applies to all limited companies, foreign companies with a UK branch or office, and certain unincorporated associations like clubs or charities. These businesses must pay tax on their taxable profits, which include trading income, investment gains, and profits from selling assets. It’s a legal obligation for registered companies operating within the UK to file and pay Corporation Tax.
What Are the Charges for Late Corporation Tax Payment?
If a company fails to pay Corporation Tax on time, HMRC applies daily interest on the overdue amount and additional penalties for late filing. Penalties start from £100 for being even one day late and can increase significantly over time, including 10% of the unpaid tax if the delay exceeds six months, along with further penalties and possible HMRC investigations.
Is It Legal to Reduce Your Corporation Tax?
Yes, it is completely legal to reduce Corporation Tax by using HMRC-approved tax planning strategies. Businesses can lower their tax liabilities by claiming allowable expenses, capital allowances, R&D relief, pension contributions, and charitable donations. These methods are within the law. However, using illegal tactics or falsifying records to avoid tax constitutes tax evasion, which carries serious legal and financial penalties.
Do Small Businesses Pay Less Corporation Tax?
Small businesses in the UK may benefit from a lower Corporation Tax rate depending on their level of profits. Companies with profits up to £50,000 pay 19%, while those earning over £250,000 pay 25%. For profits between £50,000 and £250,000, marginal relief applies. Additionally, small businesses can take advantage of various deductions and reliefs to reduce their overall tax liability legally.
How Can Startups Reduce Corporation Tax in Their First Year?
Startups can utilise the Seed Enterprise Investment Scheme (SEIS), R&D tax credits, and should ensure all pre-trading expenditure incurred up to seven years before trading commences is claimed. Careful timing of initial capital expenditure and understanding how to use early-stage losses effectively can also significantly reduce the first-year tax burden.
What is the Most Tax-Efficient Way to Pay Yourself as a Director?
Most directors use a combination of a modest salary (often near the National Insurance secondary threshold) and dividends to minimise tax and NI. Pension contributions are the most tax-efficient extraction method of all attracting full CT relief at company level with no income tax charge personally. The right mix depends on your specific circumstances and other income sources.
What Happens If Someone Uses Illegal Ways to Avoid Corporation Tax?
Using illegal methods to avoid Corporation Tax, such as underreporting income or inflating expenses, is considered tax evasion and is a criminal offence. HMRC can impose hefty fines, charge interest on unpaid taxes, initiate audits, and prosecute offenders. Convicted individuals or businesses could face serious consequences, including reputational damage, financial loss, and in extreme cases, imprisonment.
Conclusion
With corporation tax rates at their highest in years, effective tax planning is essential. By maximising every eligible business expense, leveraging tax credits, and seeking expert guidance, you can ensure your company pays only what it owes-and not a penny more.
For bespoke advice on your company structure, tax return, and tax-efficient way to manage your business finances, consult a qualified UK accountant. If you need tailored support, a professional corporation tax service can help you navigate these strategies and optimise your tax position with confidence.
Disclaimer: Kindly note this blog provides general information and should not be considered financial advice. We recommend consulting a qualified financial advisor for personalised guidance. We are not responsible for any actions taken based on this content.
