Year-End Tax Planning Checklist for Small Businesses

The weeks leading up to your company's year-end represent the most valuable tax planning window of the entire year. Actions taken before your accounting period closes can save you thousands in corporation tax, income tax, and National Insurance — but only if you plan ahead.

This checklist covers the key actions every UK small business should consider before and after their year-end. Whether your accounting period ends on 31 March, 31 December, or any other date, these strategies apply.

Before Your Year-End: Actions to Take Now

Expenses and Purchases

• Bring forward planned expenses. If you know you will need to buy equipment, renew subscriptions, or pay for services soon, do it before your year-end. The expense reduces this year's taxable profit.

• Stock up on supplies. Office supplies, materials, and inventory purchased before year-end are deductible in the current period.

• Pay outstanding invoices. If you use cash basis or cash accounting for VAT, paying supplier invoices before year-end brings the deduction into the current period.

• Review and write off bad debts. If any customers owe you money and are unlikely to pay, formally writing off the debt before year-end gives you a tax deduction.

• Check your home office claim. Make sure you are claiming the appropriate amount for use of home as an office — either the simplified flat rate or actual costs apportioned.

Capital Purchases and Allowances

• Make capital purchases before year-end. Equipment, computers, vehicles, and machinery purchased before your year-end qualify for Annual Investment Allowance (AIA) of up to £1 million, giving you a 100% deduction in the current year.

• Consider full expensing. For companies, the full expensing regime allows 100% first-year relief on qualifying plant and machinery. This is particularly valuable for significant capital investments.

• Review existing assets. Check whether any assets should be disposed of, scrapped, or written off. A balancing allowance on disposal can provide additional relief.

Pension Contributions

• Maximise employer pension contributions. These are deductible as a business expense and not subject to National Insurance. The annual allowance is £60,000 per individual (or 100% of earnings if less), and you can carry forward unused allowance from the previous 3 years.

• Consider pension contributions as an alternative to dividends. For director-shareholders, employer pension contributions are often more tax-efficient than taking additional salary or dividends.

• Check carry-forward availability. If you have unused pension annual allowance from the last 3 years, you may be able to make larger contributions this year.

Salary and Dividends

• Optimise your salary level. Ensure you are paying yourself a salary at the optimal level — typically the National Insurance Primary Threshold (£12,570 for 2024/25) to maintain NI credits without incurring NI charges.

• Declare dividends before year-end if beneficial. If your company has distributable profits and you want to extract them tax-efficiently, consider declaring dividends before your year-end — particularly if you expect to be in a higher tax bracket next year.

• Use the dividend allowance. Each individual has a £500 tax-free dividend allowance (2024/25). If your spouse or partner is a shareholder, ensure they are also using their allowance.

• Consider family member salaries. If family members genuinely work in the business, paying them a reasonable salary is an allowable expense and may use their personal allowance and lower tax bands.

Tax Reliefs and Credits

• Review R&D tax credit eligibility. Even if you do not think of your business as doing "research," many activities qualify — developing new products, improving processes, or creating bespoke software.

• Claim Employment Allowance. If eligible, you can reduce your employer NI bill by up to £5,000 per year.

• Check for patent box relief. If your company holds patents, the patent box scheme taxes qualifying profits at an effective rate of 10% instead of the main rate.

• Explore creative industry tax reliefs. Companies in film, TV, video games, animation, or theatre may qualify for specific tax reliefs.

Timing Strategies

• Defer income if appropriate. If you can legitimately delay invoicing until after your year-end, the income falls into next year's tax computation. This is especially valuable if you expect to be in a lower tax bracket.

• Accelerate expenses. The mirror strategy — bring costs forward into the current year. This is particularly effective for large one-off costs.

• Consider the marginal relief band. If your profits are between £50,000 and £250,000, you are in the marginal relief band where the effective corporation tax rate is 26.5%. Reducing profits below £50,000 (to the 19% rate) or planning around this band can produce significant savings.

After Your Year-End: Post-Closing Actions

Record-Keeping and Compliance

• Reconcile all bank accounts. Ensure every transaction is categorised and recorded.

• Gather all outstanding receipts. Chase any missing receipts before they are lost. Digital copies are acceptable.

• Finalise your accounts. Work with your accountant to prepare your statutory accounts and tax computation as early as possible.

• Set your payment and filing deadlines. Remember: pay within 9 months and 1 day, file within 12 months of your year-end.

Looking Ahead

• Review your company structure. Is your current structure (sole trader, partnership, limited company) still the most tax-efficient for your income level?

• Plan next year's salary and dividends. Set the optimal mix for the coming year based on expected profits and personal tax circumstances.

• Consider making interim tax payments. If you expect a large tax bill, setting money aside monthly (or making voluntary payments on account) avoids a cash flow shock at payment time.

• Review your VAT position. Should you register, deregister, or change VAT schemes? The start of a new accounting period is a natural time to review.

• Update your business plan. Factor in tax implications of planned investments, hires, or expansions.

Common Year-End Mistakes to Avoid

• Leaving everything to the last minute. Year-end tax planning is most effective when started 2-3 months before your year-end, not the day before.

• Focusing only on this year. A deduction this year might mean more tax next year. Always consider the multi-year impact.

• Ignoring National Insurance. NI is often forgotten in tax planning but can be as significant as income tax or corporation tax.

• Making decisions purely for tax reasons. Every tax-saving action should also make business sense. Do not buy equipment you do not need just to reduce your tax bill.

• Not keeping records. Every claim needs evidence. If HMRC enquires and you cannot produce records, the deduction will be denied.

How TaxDocs Can Help

Year-end is when accurate tax documentation matters most. TaxDocs generates comprehensive, jurisdiction-specific tax documents that capture all your deductions, allowances, and reliefs. Instead of spending days preparing spreadsheets and computations manually, upload your financial data to TaxDocs and receive professional, HMRC-ready documents in minutes. Start your year-end with confidence.

Final Thought

The best year-end tax planning is the planning you do before the year ends. Review this checklist well in advance of your accounting period close, prioritise the actions that will deliver the biggest savings, and keep thorough records to support every claim.

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