How to Reduce Business Taxes Legally in the UK: 2026 Guide
Paying tax is an unavoidable part of running a successful business, but that does not mean you should pay more than legally required.
Effective tax planning involves understanding the reliefs, allowances and deductions available to your business and making informed decisions before the relevant deadlines. It is different from tax evasion, which involves deliberately concealing income or providing false information.
These practical tax saving strategies can help UK businesses improve cash flow, manage their liabilities and operate more tax-efficiently in 2026.
Understand the Corporation Tax Rates
For the 2026 financial year, limited companies with taxable profits of £50,000 or less generally pay Corporation Tax at the small profits rate of 19%. Companies with profits above £250,000 generally pay the main rate of 25%, with Marginal Relief potentially applying between these thresholds.
These limits can be reduced where a company has associated companies or a shortened accounting period. Therefore, effective corporation tax planning should consider the wider business structure rather than looking at one company in isolation.
1. Claim All Allowable Business Expenses
Business expenses generally reduce the profit on which tax is calculated, provided they are incurred for genuine business purposes and meet the relevant tax rules.
Potential expenses may include:
- Accountancy and professional fees
- Business insurance
- Software and subscriptions
- Marketing and advertising
- Office costs
- Employee salaries
- Business travel
- Training related to the existing trade
- Telephone and internet costs
- Use of business premises
Limited companies can deduct eligible running costs when calculating taxable profits before Corporation Tax. Sole traders can also deduct qualifying expenses from business income.
Keep accurate invoices, receipts and mileage records. Personal costs and the private proportion of mixed-use expenses must not be claimed as business expenditure.
2. Use Capital Allowances for Equipment
Buying equipment does not always produce an ordinary business-expense deduction. Instead, tax relief may be available through capital allowances.
The Annual Investment Allowance allows eligible businesses to deduct the full cost of most qualifying plant and machinery, up to £1 million, from profits in the accounting period in which the expenditure is incurred. Cars are generally excluded.
Limited companies may also be able to claim full expensing, which provides a 100% first-year deduction for qualifying new and unused plant and machinery. A separate 50% first-year allowance may apply to certain special-rate expenditure.
Qualifying purchases could include machinery, computers, office equipment and some commercial fixtures. The timing of significant expenditure should be discussed with an accountant, as buying an asset shortly before or after the year end can affect when relief is received.
3. Consider Employer Pension Contributions
A company may be able to make pension contributions for directors and employees.
Employer contributions to a registered pension scheme can normally be deducted when calculating taxable business profits, provided they are incurred wholly and exclusively for the purposes of the trade and meet the relevant rules.
This can provide a tax-efficient way to reward directors or employees while supporting long-term retirement planning.
However, pension annual allowances, previous contributions and personal circumstances must be considered. Obtain advice before making a large company contribution.
4. Review How Directors Are Paid
Owner-directors may receive income through a combination of salary, dividends, pension contributions and other benefits.
The most efficient balance will depend on:
- Company profits
- Other personal income
- National Insurance
- Corporation Tax
- Available distributable reserves
- Pension objectives
- The director’s personal tax band
Dividends can only be paid from available profits and must be properly documented. For the 2026/27 tax year, the dividend allowance is £500, with tax potentially payable on dividends above the available allowance and Personal Allowance.
A salary-and-dividend approach is not automatically the best strategy for every director. Personal and company taxes should be reviewed together before payments are made.
5. Check Your Employment Allowance Eligibility
Eligible employers can reduce their employer Class 1 National Insurance liability through the Employment Allowance.
For 2026/27, the allowance is worth up to £10,500. It is used through payroll until the allowance has been exhausted or the tax year ends.
Not every company qualifies. For example, a company with one director cannot usually claim when that director is its only employee liable for employer National Insurance.
Businesses should check eligibility each tax year rather than assuming the allowance has been applied automatically.
6. Explore R&D Tax Relief
Companies attempting to resolve scientific or technological uncertainty may qualify for Research and Development tax relief.
Qualifying projects are not limited to laboratories. Software development, engineering, manufacturing and process improvement may potentially qualify when the work seeks an advance and involves genuine technical uncertainty.
Eligible costs can include certain staffing, software, data, cloud computing, consumables and contractor expenditure. The rules governing subcontracted and overseas activity are detailed and depend partly on who decided and planned the R&D.
R&D claims should be supported by clear technical and financial evidence. Businesses should avoid speculative claims made without understanding the qualifying criteria.
7. Review VAT Arrangements
VAT planning can improve cash flow even where it does not reduce the total tax payable.
Depending on the business, it may be worth reviewing:
- Whether VAT registration is compulsory or beneficial
- The VAT Flat Rate Scheme
- Cash Accounting
- Annual Accounting
- Whether all recoverable input VAT is being claimed
- The tax point applied to sales invoices
- Treatment of deposits, bad debts and overseas transactions
The most suitable arrangement depends on turnover, customers, expenditure and the nature of the business. A scheme that benefits one company may increase costs for another.
8. Plan Before the Year End
Many tax-saving decisions must be made before the accounting year closes.
A pre-year-end review might consider:
- Planned equipment purchases
- Employer pension contributions
- Bonuses and remuneration
- Bad or doubtful debts
- Stock levels
- Capital disposals
- Available tax losses
- Research and development activity
- Associated companies
- Forecast profits and cash flow
Leaving tax planning until the Company Tax Return is prepared may mean valuable opportunities have already passed.
Frequently Asked Questions
Can a business legally reduce its tax bill?
Yes. Businesses can use legitimate expenses, allowances and reliefs to ensure they pay the correct amount of tax. Transactions must be genuine, correctly recorded and compliant with current legislation.
Is tax planning the same as tax avoidance?
No. Responsible tax planning uses allowances and reliefs as intended by legislation. Artificial arrangements designed mainly to obtain an unintended tax advantage may be challenged by HMRC.
What is the most effective business tax-saving strategy?
There is no single answer. The best strategy depends on the business structure, profits, investment plans, workforce and owners’ personal circumstances.
Improve Your Business Tax Efficiency
Good UK tax efficiency is not about finding one last-minute loophole. It comes from accurate records, regular forecasting and making commercial decisions with a clear understanding of their tax consequences.
Hartley Fowler supports limited companies, sole traders and other organisations with Corporation Tax returns, VAT, payroll, annual accounts and proactive business tax planning.
To discuss your tax position and identify appropriate opportunities for business tax reduction in the UK, call the Hartley Fowler Wimbledon office on 020 8946 1212 or arrange an initial consultation.
Tax rules can change and their application depends on individual circumstances. This article provides general information and should not be treated as personalised tax advice.