End of Tax Year Planning: 5 Things UK Small Business Owners Should Do Before April 5th

As the UK tax year draws to a close on April 5th, many small business owners find themselves in a familiar scramble. Between managing day-to-day operations and keeping customers happy, "tax planning" often slides to the bottom of the to-do list. However, waiting until the last minute: or worse, waiting until after the deadline has passed: can mean missing out on significant tax savings and allowances that are "use it or lose it."

At Accountant Search, we see firsthand how proactive planning can transform a business's financial health. By taking a few strategic steps before the clock strikes midnight on April 5th, you can ensure your SME is tax-efficient, compliant, and ready for the year ahead.

Here are the five essential things every UK small business owner should do before the end of the tax year.

1. Review and Maximise Your Business Expenses

It sounds simple, but you would be surprised how many legitimate business expenses go unclaimed. For small business owners and sole traders, every pound spent "wholly and exclusively" for the purposes of the business can be deducted from your turnover to reduce your taxable profit.

Before the tax year ends, take the time to go through your digital records and physical receipts. Have you accounted for:

• Home Office Costs: If you work from home, are you claiming a proportion of your heating, electricity, and broadband?

• Travel and Subsistence: Have you logged every business-related journey? Even small mileage claims add up.

• Professional Subscriptions: Are your industry memberships and software subscriptions fully documented?

• Marketing and Advertising: Costs for your website, social media ads, and print materials are all deductible.

If you have been putting off necessary purchases: such as new office furniture or minor repairs: making those payments before April 5th can bring that expenditure into the current tax year, reducing this year’s tax bill rather than next year's.

2. Optimise Your Pension Contributions

Pensions are one of the most tax-efficient ways to extract profit from a limited company or to reduce your taxable income as a sole trader.

For limited company directors, employer pension contributions are typically treated as an allowable business expense. This means the company doesn't pay Corporation Tax on the contribution, and it isn't subject to National Insurance. For sole traders, pension contributions can help lower your "adjusted net income," which is particularly useful if you are approaching the £50,000 or £100,000 income thresholds where certain benefits (like Child Benefit) or allowances (like the Personal Allowance) start to be tapered away.

The annual allowance for pension contributions is currently £60,000 for most people, but remember that you can also "carry forward" unused allowances from the previous three tax years if you were a member of a registered pension scheme during that time. If you have extra cash in the business, moving it into a pension before April 5th is a smart move for your future self and your current tax bill.

3. Check and Use Your Dividend Allowance

If you operate as a limited company director, dividends are likely a key part of your remuneration strategy. However, the rules around dividends have tightened in recent years.

For the 2025/26 tax year, the Dividend Allowance is £500. This means you can receive up to £500 in dividends tax-free, regardless of what other income you have. While this is lower than in previous years, it is still an allowance you should aim to use.

Beyond the allowance, it is crucial to look at which tax band your total income falls into. After the £500 allowance, dividends are taxed at:

• 8.75% for basic rate taxpayers.

• 33.75% for higher rate taxpayers.

• 39.35% for additional rate taxpayers.

If you have remaining "headroom" in the basic rate band (which ends at £50,270), it might be tax-efficient to declare a dividend before April 5th to lock in that lower 8.75% rate, rather than taking a larger dividend next year that might push you into the 33.75% bracket.

Note: Always ensure your company has sufficient "distributable profits" before declaring a dividend, and make sure you have the correct board minutes and dividend vouchers in place. If this sounds complex, comparing accountant services can help you find a professional who handles this paperwork for you.

4. Leverage Capital Allowances for Equipment

If your business needs to invest in assets like machinery, vans, or IT equipment, the end of the tax year is the time to look at Capital Allowances.

The Annual Investment Allowance (AIA) remains at £1 million, allowing many SMEs to claim 100% tax relief on qualifying plant and machinery in the year of purchase. Furthermore, from January 1st, 2026, a new 40% First Year Allowance (FYA) has been introduced for certain assets, which provides an upfront deduction before the remaining balance enters the standard writing-down allowance pools.

Timing is everything here. If you buy a new laptop for the business on April 4th, you can potentially claim the full tax relief in your 2025/26 tax return. If you wait until April 6th, you will have to wait an entire extra year to see that tax benefit.

It’s also worth noting that Writing-Down Allowance (WDA) rates are set to drop from 18% to 14% for many businesses from April 2026. This makes claiming relief under the AIA or the new 40% FYA even more valuable right now. If you are weighing up the cost of getting professional support with these decisions, read How Much Do Accounting Services Cost in the UK?.

5. Get Your MTD Records in Order

Making Tax Digital (MTD) is no longer just a buzzword; it is a fundamental shift in how the UK handles taxes. If you are VAT-registered, you are already likely using MTD-compatible software. However, the next big wave is MTD for Income Tax Self Assessment (ITSA).

From April 2026, self-employed individuals and landlords with a qualifying income over £50,000 will be required to keep digital records and provide quarterly updates to HMRC. Even if you fall below this threshold for now, transitioning to digital bookkeeping today is the best way to avoid a headache later. If you want a broader overview of what this means when it comes to filing, see The Ultimate Guide to Tax Returns for Self Employed.

Use the end of this tax year as a "dry run." Ensure your software is connected to your bank accounts, your receipts are being captured digitally, and your records are reconciled. Not only does this make you MTD-ready, but it also gives you a real-time view of your business performance, which is vital for SME growth.

Conclusion: Don't Leave it to Chance

End-of-year tax planning isn't just about filing a return; it's about making sure you aren't paying more tax than you legally owe. By reviewing your expenses, topping up your pension, balancing your dividends, timing your capital purchases, and embracing digital records, you put your business in the strongest possible position.

However, every business is unique. The rules around carry-forward allowances, dividend declaration, and capital pools can be intricate. That is why the most valuable thing you can do before April 5th is to speak with a professional.

At Accountant Search, we make it easy to find the right partner for your business. Whether you need a specialist in Corporation Tax or someone to help you navigate the August MTD deadlines, we match you with vetted accountants who understand the SME landscape. For a wider overview of your options, read Accounting Services UK: The Complete Guide to Finding the Right Accountant for Your Business.

Take the stress out of April 5th. Let us help you find an accountant who can turn your tax year-end from a chore into a strategic advantage.

By Richard – Accountant Search