How to Close Your Sole Trader Business Properly

Closing a sole trader business is not as simple as deciding to stop working. There are important legal and tax obligations you must fulfil to avoid penalties, unexpected tax bills, and ongoing compliance requirements that follow you long after you have stopped trading. Whether you are retiring, moving into employment, incorporating into a limited company, or simply changing direction, getting the wind-down process right matters.

This guide covers every step you need to take when closing your sole trader business, from notifying HMRC to retaining records for the required period. We will flag the deadlines you cannot afford to miss and explain how Penny, your AI bookkeeper on Accounted, can help you stay on top of the process.

Notifying HMRC and Deregistering

The first and most critical step when you stop self-employment is telling HMRC. You must notify them that you have ceased trading, and the sooner you do this, the better.

Stopping Self Assessment

You need to tell HMRC you are no longer self-employed so they can update your tax record and stop issuing Self Assessment notices to file. You can do this by:

• Calling HMRC on 0300 200 3310
• Completing the online process through your Government Gateway account
• Submitting form CWF1 to deregister from Self Assessment as a sole trader

The official guidance on GOV.UK for stopping self-employment recommends you do this as soon as you cease trading. If you delay, HMRC will continue to expect Self Assessment returns, and you could receive penalties for late filing even if you have no income to report.

You should notify HMRC within a reasonable timeframe of stopping your business activity. Failure to do so does not just create administrative headaches; it can trigger automatic penalties and unnecessary enquiries.

Deregistering for VAT

If you are VAT registered, you must deregister when you stop making taxable supplies. You can deregister online through your VAT account or by completing form VAT7.

When you deregister, you need to account for VAT on any business assets you still hold that cost more than £1,000 in total and on which you reclaimed input VAT. This is sometimes called the "final VAT return adjustment." You effectively pay back the VAT on stock and assets you are keeping, because they are no longer being used to make taxable supplies.

Your final VAT return must cover the period up to your deregistration date, and you must submit it within the normal deadline. Do not assume that stopping trading means your VAT obligations disappear immediately.

Cancelling CIS Registration

If you are registered under the Construction Industry Scheme, either as a subcontractor or a contractor, you need to cancel your CIS registration separately. Contact HMRC's CIS helpline on 0300 200 3210 to arrange this.

Filing Your Final Self Assessment Return

Even after you stop trading, you must file a Self Assessment tax return covering the period up to your cessation date. This is your final return, and it is arguably the most important one you will file.

Preparing Final Accounts

Your final set of accounts will cover the period from the start of your accounting year to the date you stopped trading. For most sole traders, the accounting year aligns with the tax year (6 April to 5 April), but if yours differs, the basis period rules apply to determine which profits fall into which tax year.

Since the basis period reform that took effect from the 2024-25 tax year onwards, sole traders are now taxed on profits arising in the tax year itself, which simplifies matters for those ceasing to trade. Your final tax year profits are simply the profits from 6 April to your cessation date.

Your final accounts should include:

• All income received and receivable up to the cessation date
• All expenses incurred up to the cessation date, including any terminal loss relief that may be available
• Capital allowances, including any balancing allowances or balancing charges on assets you sell or retain
• Any adjustments for stock, work in progress, or debtors

For guidance on Self Assessment returns generally, see the GOV.UK Self Assessment tax returns page. If you need a refresher on the filing process, our Self Assessment guide on the blog walks through it step by step.

Terminal Loss Relief

If your business makes a loss in its final twelve months of trading, you may be able to claim terminal loss relief. This allows you to carry the loss back and set it against your trading profits from the previous three tax years, with the most recent year first. This can generate a tax refund, which is particularly valuable if your final year of trading was unprofitable.

Terminal loss relief is often overlooked, and it is one of the areas where having accurate records throughout your trading life pays dividends.

Balancing Allowances and Charges

When you cease trading, any assets on which you have claimed capital allowances must be dealt with. If you sell an asset for less than its tax written-down value, you can claim a balancing allowance for the difference. If you sell it for more, you face a balancing charge, which adds to your taxable profits.

If you keep assets for personal use rather than selling them, HMRC treats you as having disposed of them at market value. This can trigger a balancing charge if the market value exceeds the written-down value.

Settling Outstanding Tax and National Insurance

Your final Self Assessment return will produce a tax bill covering your last period of trading. Make sure you understand the payment timeline:

• Tax for the final year is due on 31 January following the end of the tax year in which you stopped trading
• If you were making payments on account, your balancing payment will settle the difference between what you have already paid and what you owe
• You should ask HMRC to reduce or cancel future payments on account if your final year profits are lower than the previous year, to avoid overpaying

Class 2 National Insurance contributions cease from the date you stop being self-employed, provided you notify HMRC promptly. Class 4 NIC is calculated on your final year profits in the usual way and collected through Self Assessment.

If you owe tax and are unable to pay in full, contact HMRC as early as possible to discuss a Time to Pay arrangement. Ignoring the bill will result in interest, surcharges, and potential enforcement action.

Capital Gains on Business Assets

When you sell or dispose of business assets, Capital Gains Tax (CGT) may apply on any gain. This is separate from the balancing allowance or charge for capital allowances purposes.

Business Asset Disposal Relief (formerly Entrepreneurs' Relief) may be available if you are disposing of all or part of your business. This reduces the CGT rate to 10% on qualifying gains up to a lifetime limit of £1 million. To qualify, you must have been in business for at least two years prior to disposal.

If you are selling goodwill, transferring a client book, or disposing of business premises, take professional advice to ensure you structure the transaction tax-efficiently. The interaction between capital allowances, CGT, and Business Asset Disposal Relief can be complex.

Record Retention: The Five-Year Rule

Once you have filed your final tax return and settled your tax affairs, you might be tempted to shred everything and move on. Do not do this.

HMRC requires you to keep your business records for at least five years after the 31 January filing deadline of the relevant tax year. For your final year of trading, this means:

• If you stopped trading in the 2025-26 tax year, your final return is due by 31 January 2027
• You must keep your records until at least 31 January 2032

The records you need to retain include:

• Sales and income records
• Purchase and expense receipts
• Bank statements
• Mileage logs
• VAT records (if applicable)
• Employment records (if you had staff)
• Capital allowances computations
• Your final accounts and tax return

If HMRC opens an enquiry into your final return, they can request all of these documents. If you cannot produce them, HMRC may estimate your profits, usually to your disadvantage.

Penny stores your records digitally on Accounted, which means they are secure, searchable, and accessible for as long as you need them. Even after you stop actively using the service, your data remains available for the retention period. This alone can save you significant stress if HMRC comes knocking years after you have closed the business.

Closing Your Business Bank Account

Do not rush to close your business bank account. You may have:

• Outstanding invoices yet to be paid by clients
• Direct debits or standing orders that need to be cancelled
• A final tax payment to make
• Refunds due from suppliers or HMRC

Wait until all transactions have settled, your final tax bill has been paid, and you are confident no further money will flow in or out. Then contact your bank to close the account formally. Keep your final bank statements as part of your record retention.

A Step-by-Step Checklist for Closing Down

To summarise, here is the complete process:

1. Decide on your cessation date and stop trading
2. Notify HMRC that you have stopped being self-employed
3. Deregister for VAT if applicable, and file your final VAT return
4. Cancel CIS registration if applicable
5. Collect outstanding debts from customers
6. Sell or dispose of business assets, noting any CGT implications
7. Prepare your final accounts covering up to the cessation date
8. File your final Self Assessment return by the deadline
9. Pay any outstanding tax by 31 January following the end of the tax year
10. Claim terminal loss relief if your final period was loss-making
11. Reduce payments on account if appropriate
12. Close your business bank account once all transactions have settled
13. Store your records securely for at least five years after the filing deadline

How Accounted Helps with the Closure Process

Closing a business is stressful enough without worrying about missing a deadline or losing a critical document. Penny helps throughout the process by:

• Generating your final profit and loss account and balance sheet from your transaction data
• Identifying capital allowances balancing adjustments automatically
• Flagging potential terminal loss relief claims
• Storing all your records digitally for the required retention period
• Sending reminders for your final Self Assessment filing and payment deadlines

If you are in the process of closing your sole trader business, or thinking about it, having your records in good order makes everything easier. Take a look at our pricing plans to see how Accounted can support you through the transition, even if you are only using it for the final few months.

Closing a business is an ending, but it does not have to be a difficult one. With the right preparation, proper notifications, and careful attention to your final tax obligations, you can draw a clean line under your self-employment and move forward without HMRC surprises lingering in the background.

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