Timing Your Trading Cessation to Cut Tax on Your Final Year

Why the Timing of Cessation Matters

When you stop trading as a sole trader, HMRC calculates your final tax bill using the profits earned up to your cessation date. But this isn't just about your last few months of income — it's also the moment you finally get to claim overlap relief, a deduction that may have been sitting unused for years. Getting the timing right can mean the difference between a manageable tax bill and an unexpectedly large one.

What Is Overlap Relief and Why Does It Matter Now?

When you first started your business, if your accounting year didn't align with the tax year (6 April to 5 April), HMRC taxed some of your early profits twice. The amount taxed twice is your overlap profit, and the relief attached to it is called overlap relief. This relief is only deductible in two situations: when you change your accounting date, or when you permanently cease trading.

Many sole traders have substantial overlap relief built up — sometimes tens of thousands of pounds — that has never been used. Cessation is your final opportunity to offset it against your closing year profits, so you want to make sure those profits are high enough to absorb it, but not so high that you lose the benefit of your Personal Allowance and basic rate band.

The New Tax Year Basis and What Changed in 2024-25

Since the 2024-25 tax year, HMRC moved all sole traders onto the tax year basis. This means your taxable profits are now always calculated on a 6 April to 5 April basis, regardless of your accounting year end. As a result, overlap relief has largely been unwound — but if you transitioned and still have residual overlap relief carried forward, cessation remains the point at which any remaining balance is deducted from your final taxable profits.

Choosing the Best Date to Stop Trading

Because your final period runs from 6 April to your cessation date, the timing of when you stop can directly affect how much profit falls into that final tax year. Here are the key strategies to consider:

• Cease early in the tax year if profits are rising. Stopping in April or May means only a short window of profit is taxable in that year, keeping your total income lower and potentially within the basic rate band.
• Cease later in the tax year if profits are low or you have large expenses. If you have significant deductible expenses to run through — equipment purchases, professional fees, final invoices to settle — a later cessation date lets you offset these against a fuller period of income.
• Match cessation to your overlap relief balance. If you have meaningful overlap relief remaining, aim for a cessation date where your projected final year profits, minus the overlap relief, land just below the higher rate threshold (£50,270 in 2026-27) to avoid a 40% tax charge on any excess.
• Consider your Personal Allowance. If you have other income in the year — employment income, rental income, or a spouse's salary — factor this in. Your Personal Allowance (£12,570) may already be used up, making it even more important to keep sole trader profits lean in the final year.

Practical Steps Before You Cease

Before you notify HMRC of your cessation, take these actions to protect your position:

• Pull together your overlap relief figure — check your original tax returns or contact HMRC's Self Assessment helpline if you're unsure of the amount.
• Speak to your accountant about accelerating allowable expenses into the final period, such as renewing software subscriptions or settling outstanding invoices early.
• Consider whether any capital assets you're selling or disposing of on cessation will trigger a capital gain or balancing charge — these can significantly increase your final year tax liability.
• Notify HMRC of your cessation date promptly by calling the Self Assessment helpline or updating your record online, ensuring your final Self Assessment return is filed correctly.

Don't Leave Overlap Relief on the Table

Overlap relief is one of the few genuinely generous deductions available to sole traders, and cessation is your last chance to use it. With careful planning around your cessation date, your final year profits, and your wider income picture, you can ensure your last tax return as a sole trader is as efficient as possible.