Most small business owners in the UK use only a small fraction of the reliefs and deductions they are entitled to, often leaving significant savings unclaimed simply because tax planning is pushed aside until the deadline approaches. Good tax planning is not about clever loopholes. It is about understanding the rules and applying them consistently throughout the year rather than scrambling at the last minute.
2026/27 Update: Dividend Tax Rates
Since April 2026 the dividend tax rates are 10.75% within the basic rate band, 35.75% within the higher rate band and 39.35% within the additional rate band, each applying above the dividend allowance. If you have read older guides quoting the previous rates, these 2026/27 figures are the ones to use in your planning.
This is general information, not tax advice. Tax rules change, so check GOV.UK or speak to an accountant before acting on it.
This guide follows on from our business finance for beginners guide, which covers the broader financial picture alongside tax.
What Is Tax Planning?
Tax planning is the legal process of organising your business finances to minimise your tax liability, using legitimate reliefs, allowances, and correctly timed decisions rather than avoiding obligations. It is an ongoing, year round process rather than something handled once at the filing deadline.
Choosing the Right Business Structure
Your business structure has a major influence on how profits are taxed. Sole traders and partnerships pay tax on profits as personal income, which can push earnings into higher tax bands as the business grows. Limited companies are taxed separately from their owners, usually through a combination of a modest salary and dividends, which can offer greater tax efficiency once profits reach a certain level, though it comes with more administrative responsibility.
For a fuller side-by-side comparison of the two structures, see our guide to sole trader vs limited company tax in the UK.
Claiming Every Legitimate Business Expense
HMRC allows business expenses to be deducted from taxable profit where they are incurred wholly and exclusively for business purposes. Common categories include office costs, travel, professional fees, marketing, and equipment. Keeping accurate, well-organised records throughout the year is essential, since expenses that are poorly documented are far harder to justify if HMRC ever asks questions.
Salary and Dividends for Limited Company Directors
Limited company directors can often reduce their overall tax and National Insurance liability by taking a combination of a modest salary and dividends, rather than a single large salary. The right balance depends on current tax thresholds and personal circumstances, and is worth reviewing with an accountant each year as rates and allowances change.
We work through the two options with the post-April-2026 figures in our salary vs dividends guide for limited company directors.
VAT Planning
Businesses must register for VAT once turnover passes the current threshold, but voluntary registration before reaching it can sometimes be advantageous, particularly for businesses that mostly sell to other VAT-registered companies. Planning VAT registration ahead of time, rather than reacting once the threshold is crossed, avoids sudden pricing changes and unexpected cash flow pressure.
The threshold itself, what counts towards it and what happens when you cross it are covered in our guide to the UK VAT registration threshold.
Timing Income and Expenses
Where legitimately possible, timing large expenses to fall within the most tax-efficient period, or delaying a planned purchase by a few weeks to land in the next accounting period, can shift when tax relief is realised. This requires forward planning rather than last-minute decisions, which is one reason regular financial reviews are so valuable.
Using Available Allowances and Reliefs
- The Annual Investment Allowance, which allows qualifying equipment purchases to be deducted from profits in full
- Research and Development tax relief, for businesses carrying out qualifying innovation work
- The trading allowance, relevant to smaller sole trader income
- Pension contributions, which can reduce taxable profit while building long term personal savings
Our guide to capital allowances explains the Annual Investment Allowance and the other reliefs in full.
Businesses doing qualifying innovation work should also read our guide to R&D tax credits for small businesses, which covers the current scheme and how to claim.
On the company side, the rates and bands themselves change regularly. Our guide to UK corporation tax rates for 2026/27 keeps the current figures in one place with worked examples.
Staying Ahead of HMRC Deadlines
| Business Type | Key Deadline | What Is Due |
|---|---|---|
| Sole Trader | 31 January | Self Assessment return and tax payment for the previous tax year |
| Limited Company | 12 months after accounting period end | Corporation Tax return filing |
| Limited Company | 9 months and 1 day after accounting period end | Corporation Tax payment |
Making Tax Digital for Income Tax is now live. From April 2026, self-employed people and landlords with qualifying income above £50,000 must keep digital records and submit quarterly updates through compatible software, with the £30,000 to £50,000 band following from April 2027. If that describes you, add MTD to your quarterly planning habit now rather than waiting for the first deadline. Our Making Tax Digital guide for the self-employed in 2026 explains what to do and when.
A Simple Quarterly Tax Planning Habit
Rather than treating tax as a once-a-year scramble, reviewing profit, expenses, and upcoming deadlines every three months turns a stressful annual task into a manageable, repeatable process. This also gives early warning if a tax reserve needs increasing due to higher than expected income.
Frequently Asked Questions
Is tax planning legal?
Yes. Tax planning means legally organising your finances to minimise tax owed using legitimate reliefs and allowances. This is entirely different from tax evasion, which involves illegally concealing income or falsifying records.
Should I set up as a sole trader or a limited company for tax purposes?
This depends on your profit level, growth plans, and appetite for administrative responsibility. Many businesses start as sole traders and transition to a limited company once profits reach a level where the tax efficiency outweighs the added administration.
How much should I set aside for tax as a small business?
This depends on your structure and profit level, but many advisers suggest setting aside a fixed percentage of income as it arrives, reviewed regularly, so the eventual bill is never a surprise.
Do I need an accountant for tax planning?
It is possible to manage basic tax planning independently, but most business owners benefit from professional advice once their finances involve VAT, employees, or a limited company structure, since the potential savings often outweigh the cost of advice.
Final Thoughts
Effective tax planning is a habit, not a once a year event. Choosing the right business structure, claiming every legitimate expense, and reviewing your position quarterly rather than annually puts you in control of your tax position instead of reacting to it under pressure.
About the Author
