Stopping Self-Employment , The Final Tax Return And Overlap Profits
- MAZ
- 2 days ago
- 20 min read
Stopping Self-Employment: The Final Tax Return and Overlap Profits
Closing a self-employment is more administratively involved than simply stopping work and filing one last return. The final tax return requires the correct cessation date, the correct treatment of any outstanding debtors and creditors, the disposal of business assets, the handling of capital allowances, and , for anyone who started their business before the tax year basis reform took effect in 2024/25 , the all-important question of overlap profits.
For sole traders who have been trading for many years with a non-April year end, the cessation year may be the first time overlap profits become relevant again since they were created. Understanding what they are, how they are applied, and what happens if they cannot be confirmed from HMRC's records is genuinely important , getting it right reduces taxable profits in the final year and can represent a meaningful tax saving.
Notifying HMRC of Cessation
The first formal step when ceasing self-employment is to notify HMRC. You should tell HMRC if you have stopped being self-employed. You can do this online through your personal tax account or by contacting HMRC directly. You must also deregister from Self Assessment if you no longer need to complete a return after cessation.
The date of cessation is the date trading genuinely stopped , the last day on which the business was actively operating. This is not necessarily the last date income was received, since payments for work completed before cessation may continue to arrive for some time.
If the business was VAT-registered, a separate VAT deregistration is needed, typically within 30 days of the cessation date. PAYE de-registration applies if the business had employees. National Insurance contributions at Class 4 cease with self-employment; Class 2 also ceases, though Class 2 was abolished as a compulsory contribution from April 2024.
Deregistering from Self Assessment is relevant only if the individual has no other reason to file , no rental income, no investment income above reporting thresholds, no other trades. Many people who stop one self-employment continue in employment or with other income sources that keep them in Self Assessment regardless.
The Basis Period Reform and Why 2024/25 Changed Everything
For most of the history of UK self-employment taxation, profits were assessed on a basis period that followed the business's own accounting year , not the tax year. A sole trader with a 31 December year end would pay tax in 2024/25 on profits for the year ending 31 December 2024. This created timing differences, and the mechanism that handled the opening years , where profits could overlap between the basis period and the tax year , created something called overlap profits.
The basis period rules changed from 2024/25. From that tax year, all self-employed businesses are taxed on profits arising in the tax year , 6 April to 5 April , rather than in the accounting period. This is the "tax year basis".
The 2023/24 year was a transitional year during which profits from the accounting year were recalculated on a tax year basis, and any overlap profits accumulated under the old rules were released and set against the transitional year profits.
This means that anyone who was self-employed through the 2023/24 transition and remained trading into 2024/25 and beyond should already have had their overlap profits released. Their cessation, whenever it now occurs, is on the tax year basis and the overlap profit question is largely resolved.
However, two groups of sole traders may still encounter overlap profit questions at cessation:
Those who ceased before or during the transition: If a business ceased before 6 April 2024 , before the transition year was complete , the cessation rules under the old basis period system applied, and overlap profits were relevant to the final return under those rules.
Those whose overlap profits were not correctly released during the transition: If a sole trader's 2023/24 transitional return did not correctly capture and apply the overlap profits at that stage, the final return may need to address the discrepancy.
Understanding Overlap Profits: The Background
Overlap profits arose under the old basis period rules because, in the opening years of a business with a non-April year end, some profits were taxed twice , once in their own accounting year, and again when that period fell within the basis period for the following tax year.
A business that started trading on 1 July 2015 with a 30 June year end would, in its early years, have profits assessed partly on a twelve-month basis and partly on overlapping periods. The amount of profit double-counted was the overlap profit, carried forward until cessation (or a change of year-end).
At cessation under the old rules, those overlap profits were deducted from the final period's taxable income. A sole trader with £12,000 of accumulated overlap profits who ceased trading with a final accounting period profit of £30,000 would only pay tax on £18,000 in the final year. This deduction was not optional , it applied automatically, reducing the risk of the same profits being taxed twice.
Finding Your Overlap Profits: What HMRC Holds and What They Don't
This is the area that causes the most practical difficulty at cessation. Overlap profits were recorded on the original Self Assessment returns from the opening years of trading , years that may be a decade or more in the past.
HMRC may hold records of your overlap profits from earlier returns. You can contact HMRC to ask what figure they hold for your overlap profits. However, HMRC's records may not always be accurate or may not have been updated correctly in all cases.
The most reliable source of the overlap profit figure is the individual's own Self Assessment returns from the early years of trading. The figure was typically calculated and shown on the returns for the first and second years of trading, and carried forward in subsequent years until used.
Where original returns have been lost or were never filed correctly, the calculation can sometimes be reconstructed from bank records, invoices, and accounting records from the early years. For businesses that started trading many years ago, this reconstruction can be challenging , but the effort is worth making given the tax value of the overlap profit deduction.
During the 2023/24 transition year, HMRC requested that taxpayers provide their overlap relief figures. Those who did not provide a figure, or who provided a nil figure incorrectly, may have lost the benefit of overlap relief in the transitional year. For those still in this position, correcting the 2023/24 return through an amendment , within the amendment time limit of twelve months after the filing deadline , is still possible if the original return was filed incorrectly.
The Final Period Calculation: Putting It Together
For a sole trader ceasing under the current tax year basis (i.e., cessation after 5 April 2024), the final return covers profits from 6 April of the final year to the cessation date. Because the tax year basis aligns the accounting period with the tax year, there is typically no separate overlap profit deduction needed at cessation for businesses that went through the 2023/24 transition correctly.
Where the cessation is accompanied by outstanding matters , debtors not yet collected, creditors not yet paid, stock, work-in-progress, and capital assets , the accruals or cash basis treatment of the final period must be applied consistently.
Under cash basis: Income recognised when received, expenses when paid. Outstanding debtors and creditors at cessation are not brought in , only actual receipts and payments in the final period count. This simplifies the final year but means any debtors not collected by the cessation date do not reduce the business's tax position.
Under accruals: The final accounts include all income earned and expenses incurred up to the cessation date, regardless of cash receipt timing. Outstanding debtors are included as income; outstanding creditors are deductible. This is more accurate but requires complete accruals records at the cessation date.
Capital Allowances at Cessation
When a business ceases, the capital allowances pool is closed and a balancing allowance or balancing charge arises.
When you stop being self-employed, you must work out your final capital allowances. Any assets remaining in your pool at the date you stop trading are treated as being sold at their market value. If the pool value exceeds the disposal proceeds, you get a balancing allowance , additional tax relief. If the disposal proceeds exceed the pool value, a balancing charge arises and you owe additional tax.
For a sole trader with a main pool TWDV (tax written-down value) of £8,000 and business assets with a collective market value of £5,000, the balancing allowance is £3,000 , a further deduction in the final year's profits. For a sole trader whose assets are worth £12,000 against a pool TWDV of £8,000, the balancing charge of £4,000 is added back to taxable profits.
One common error is treating the business assets as having no value at cessation , perhaps because the sole trader considers them worn out or worthless. HMRC requires that assets be valued at market value, not at zero unless they are genuinely worth nothing. A commercial vehicle used by a tradesperson may still have a meaningful resale value even if it feels past its prime. Overstating the condition of assets at cessation is a risk area in HMRC enquiries.
Special rate pool assets , those with long useful lives, typically taxed at 6% per annum , are dealt with in the same way, producing their own balancing allowance or charge calculated separately.
Cars at Cessation
Cars do not attract AIA and have their own pool entries based on CO2 emissions. At cessation, the balance in the car pool is compared to the car's market value, generating a balancing allowance or charge in the same way as the main pool. If you use your car for both business and private purposes, only the business-use proportion of any balancing allowance or charge affects your taxable profits.
A tradesperson who has been claiming 60% business use on their car would apply 60% of the resulting balancing allowance or charge to their final year's self-employment profits.
Post-Cessation Receipts and Expenses
Cessation of trading does not necessarily mean all income and expenses relating to the business disappear cleanly on the cessation date. Some amounts arise after the business has stopped , payments received late, final bills arriving after the final trading day, or professional costs incurred in winding up.
Post-cessation receipts are amounts received after a business has ceased that arise from the former trade. They are taxable as income for the tax year in which they are received, not the year of cessation.
This means a sole trader who ceases in December 2026 but receives a final client payment in February 2027 declares that payment as income on their 2026/27 return if it relates to work completed before cessation.
Post-cessation expenses , costs incurred after cessation that relate to the former trade , are generally deductible against post-cessation receipts. If there are no post-cessation receipts against which to offset them, relief may be available against other income.
Common post-cessation expenses include professional indemnity insurance premiums paid after cessation for the run-off period, final accounting fees, and costs of pursuing outstanding debtors through the courts.
Terminal Loss Relief: The Final Year's Losses
If the final period of self-employment generates a loss , which can happen where closure costs, capital allowances balancing allowances, or a difficult final trading period combine , terminal loss relief applies.
Terminal loss relief allows a loss made in the final twelve months of trading to be carried back and offset against profits of the same trade from the previous three tax years, on a last-in, first-out basis.
This is more generous than the standard carry-back relief, which is limited to one year. The three-year carry-back under terminal loss relief can produce a repayment of tax from years that have already been settled , a cash receipt from HMRC at the close of the business.
The terminal loss claim is made on the Self Assessment return for the final year. The amount of the loss that can be carried back is the loss in the final twelve months of trading , which may span two tax years depending on when cessation occurs. Calculating the terminal loss correctly requires identifying the twelve-month window ending at cessation and the loss arising in that period.
Deregistering Class 4 NIC and Updating HMRC
Class 4 National Insurance contributions are paid by self-employed individuals on profits above the annual lower profits limit , £12,570 for 2026/27 , through Self Assessment. On cessation of all self-employment, Class 4 NIC ceases from the date of cessation.
In the final return, Class 4 NIC is calculated only on profits arising in the period for which the business was actually trading. If cessation occurs on 31 December 2026, the Class 4 calculation covers the profits from 6 April 2026 to 31 December 2026 , not the full tax year.
The NIC position for the transitional months , from cessation to 5 April , depends entirely on whether the individual has other self-employment. No Class 4 NIC arises on those months if there is no other self-employment activity.
Class 4 NIC is automatically removed from future Self Assessment calculations once HMRC's records reflect the cessation notification.
The Final Return: Practical Completion Checklist
For a sole trader approaching cessation, the following sequence addresses the main compliance requirements:
Confirm cessation date. The date on which trading genuinely stopped , not the last payment date, not a convenient quarter-end.
Prepare final accounts to cessation date. Under cash basis: identify all receipts and payments in the period. Under accruals: complete a full set of accounts including debtors, creditors, prepayments, and WIP at cessation.
Check overlap profits. If the business operated before 2024/25 and went through the transitional year, confirm the overlap profits were correctly released in 2023/24. If there is doubt, contact HMRC or check original early-year returns.
Calculate capital allowances. Value all business assets at market value. Calculate the balancing allowance or charge for each pool. Apply the business-use proportion for dual-use assets.
Consider post-cessation matters. Identify any income that will arrive after cessation and relate to the former trade , report these as post-cessation receipts in the year received. Note any post-cessation expenses.
Assess terminal loss relief. If the final twelve months generate a trading loss, calculate the terminal loss relief available and carry it back against prior years' profits.
Notify HMRC. Use the personal tax account or contact HMRC by telephone to notify cessation of self-employment. Ensure the final return reflects the correct cessation date and that subsequent years do not include self-employment income incorrectly.
Cancel VAT registration if applicable , within 30 days of cessation.
File the final Self Assessment return , on time, since late filing penalties apply even for final returns with relatively small liabilities.
Key Takeaways
● Cessation requires formal notification to HMRC , through the personal tax account or by telephone , along with the filing of a final Self Assessment return covering profits to the cessation date.
● For businesses that ceased after the 2023/24 basis period reform, the tax year basis applies to the final return. Overlap profits should already have been released in the 2023/24 transitional return; any remaining issues should be corrected through an amendment where the time limit permits.
● Capital allowances are finalised at cessation with balancing allowances or charges arising from the comparison of pool values against market values of remaining assets.
● Post-cessation receipts relating to the former trade are taxable in the year received, not the year of cessation. Post-cessation expenses may be deductible against those receipts or against other income.
● Terminal loss relief allows the final twelve months' trading loss to be carried back against profits of the same trade from the three preceding tax years.
● Class 4 NIC is calculated only on profits earned while the business was actually trading in the final tax year , not on a full-year basis if cessation occurs before 5 April.
FAQs
Q1: If someone stops self-employment partway through a tax year and then starts a completely new unrelated self-employment in the same year, do they need to file two separate sets of self-employment pages on their return?
A1: Well, it is worth noting that two separate self-employments in the same tax year , even where one has ceased and another has begun , are reported on separate self-employment supplementary pages within the same Self Assessment return. The ceased trade has its own income and expenses from 6 April to the cessation date, its own capital allowances calculation with a balancing event, and its own treatment of any overlap profits relevant to that business. The new trade has its own income and expenses from the start date to 5 April.
They are not aggregated , they are separately calculated and then combined on the main return to arrive at total income. The practical implication is that the ceased trade's capital allowances pool is closed out and a balancing allowance or charge calculated. The new trade starts with a fresh capital allowances position. If the same physical assets are transferred from the old trade to the new one , a plumber who stops working sole trade and starts a new plumbing business in a different form , the assets are treated as disposed of from the old trade at market value and acquired by the new trade at the same value. This generates the relevant balancing event on cessation even if the individual continues to use the same van and tools.
Q2: What happens to a sole trader's overlap profits if they never claimed them during the 2023/24 transitional year, and are they lost permanently?
A2: In my experience, this is one of the most pressing questions for sole traders who went through the 2023/24 transition and are only now realising their overlap relief may have been omitted. The answer depends on whether the 2023/24 return has already been finalised and whether the amendment window is still open. Self Assessment returns can be amended within twelve months of the original filing deadline , so a 2023/24 return filed by 31 January 2025 can be amended until 31 January 2026. If the overlap relief was not included in the original 2023/24 return but the amendment window is still open, amending to include it is straightforward and produces a repayment of tax.
Where the amendment window has closed, the position is more difficult. HMRC has discretion to accept late claims in certain circumstances , for example, where there was a genuine error or where HMRC itself holds incorrect records , but late claims outside the standard window are not guaranteed. For those who missed the opportunity, contacting HMRC to explain the circumstances and ask whether a late amendment will be accepted is worth doing. The earlier this is addressed, the better the prospects. If the opportunity is genuinely lost, the sole trader has effectively been taxed twice on the overlap profit amount , an unfair outcome, but one that HMRC's transitional guidance was specifically intended to prevent.
Q3: If a sole trader's accountant holds the overlap profit records but the accountant has retired, how can the overlap profit figure be reconstructed?
A3: Well, this is a genuinely practical problem that arises with businesses that have been trading for many years. When an accountant retires, their client files should be transferred to the client or to a successor firm , the client owns their own tax records, not the accountant. The starting point is to contact the retired accountant's practice directly or their professional body, which may be able to locate where the practice records went.
If the accountant was a member of the ICAEW, ACCA, or CIOT, those bodies can sometimes assist with tracing successor practices. If the records are genuinely unavailable, the overlap profit figure can often be reconstructed from original HMRC correspondence , specifically the Self Assessment statements of account from the early years of trading, which sometimes reference the overlap relief figure. HMRC's own records may also hold a figure , contacting the Self Assessment helpline and asking specifically about the overlap relief on record for the business is worth attempting. If HMRC holds no figure or an incorrect one, the reconstruction falls back to the original trading accounts and bank records from the first two years of trading, from which the overlap period profit can be recalculated. A tax adviser experienced in this type of reconstruction can often produce a defensible figure from incomplete records more efficiently than an attempt to do it alone.
Q4: Does a sole trader who has been using the cash basis throughout their trading history have overlap profits to worry about at cessation?
A4: Well, this is actually a straightforward one to resolve. The cash basis was only available from April 2013 onwards , it was not an option for businesses that started before that date. Additionally, overlap profits arose under the old basis period rules, which applied to businesses with non-April year ends in their early trading years. A sole trader who has been on the cash basis since it became available in 2013 would have made a specific election to use it, and under the cash basis, the old basis period rules did not apply in the same way. However, if the business started before April 2013 on accruals with a non-April year end, overlap profits may have been created in those early years , even if the business subsequently switched to cash basis.
The overlap profits from the accruals period would carry forward regardless of the subsequent accounting method change. So the answer depends on when the business started and what method was used in those early years, not just what method is currently in use. A sole trader who started in 2010 with a January year end on accruals, created overlap profits, and later switched to cash basis may still have unclaimed overlap profits sitting in their history. The switch to cash basis in subsequent years did not release or write off those overlap profits , they remained available until cessation or a year-end change.
Q5: What are the income tax implications for a Scottish sole trader who ceases self-employment and receives a terminal loss carry-back repayment?
A5: Well, the Scottish income tax rates apply to the original profits that were taxed in the carry-back years, and the repayment is calculated based on those rates. A Scottish sole trader whose terminal loss is carried back against profits from three years earlier would receive a repayment based on the Scottish income tax rates that applied to those profits in those specific years. This means the repayment calculation must use the historical Scottish rate structure that was in force for each carry-back year , not simply the current year's rates. Scottish income tax rates have differed from rest-of-UK rates since April 2018, and the rates themselves have changed in subsequent years.
A carry-back spanning multiple years requires separate rate calculations for each year involved. For a Scottish sole trader with a meaningful terminal loss, this can produce a slightly different repayment amount than an English equivalent would receive if their carry-back years were taxed at different rates. The practical implication is that the carry-back calculation should be done year by year using the correct Scottish rate for each year, rather than applying a single blended rate across the three-year period. A tax adviser familiar with Scottish income tax history will ensure the repayment is correctly calculated and claimed.
Q6: If a sole trader ceases trading but continues to receive royalties or licence fees from intellectual property created during the trade, how are these taxed after cessation?
A6: Well, this is one of the more nuanced post-cessation income scenarios, and the answer depends on the nature of the royalties. If the royalties arise directly from the former trade , for example, a freelance author who ceases trading but continues to receive royalties from books written during the trading period , those royalties may qualify as post-cessation receipts of the former trade and are taxed as such in the year received. Post-cessation receipts are taxable income but benefit from any offsetting post-cessation expenses. Where the royalties are from intellectual property that was transferred or sold as part of the cessation , for example, the rights were sold to a third party , the proceeds form part of the cessation disposal, not post-cessation receipts.
Where the royalties continue indefinitely and the former trader becomes essentially a passive licensor rather than a trader, HMRC may at some point consider the income as savings income rather than trading income , but this transition depends on the specific facts and the nature of the original trade. For most former self-employed individuals receiving modest ongoing royalties from their former creative work, the post-cessation receipts route is the most practical. The key is to report them in the correct income category on the Self Assessment return for the year they are received.
Q7: Can a sole trader amend their cessation date after filing their final Self Assessment return, if they realise they stopped trading earlier than they originally declared?
A7: Well, amending the cessation date is possible within the Self Assessment amendment window , twelve months after the original filing deadline. The cessation date affects the basis period for the final year's profits, the capital allowances cessation calculation, and potentially the Class 4 NIC liability. If the correct cessation date produces a lower profit in the final period , for example, because the earlier cessation date removes some income from the final trading period , the amendment could generate a tax repayment. HMRC may ask for supporting evidence of the earlier cessation date if the amendment produces a significant change.
Appropriate evidence includes the date of the last client invoice, the date of the final bank receipt from a customer, correspondence confirming a project end date, or any other contemporaneous evidence of when trading genuinely stopped. What HMRC will not accept is a retrospectively chosen earlier cessation date that does not reflect the actual trading history. The cessation date should correspond to when the business genuinely ceased to operate as an ongoing concern , the last actual day of business activity, not a convenient date chosen to reduce tax.
Q8: If a sole trader ceases and has unpaid invoices that are subsequently written off as bad debts, can any tax relief be claimed?
A8: In my experience, this question comes up regularly for former self-employed individuals who cease trading with outstanding debtors that then prove uncollectable. The answer depends on which accounting basis the business was using. Under the cash basis, debtors were never included in taxable income in the first place , income was only recognised when received. A debtor that was never paid and never received therefore has no impact on the tax position, because it was never counted as income. Under accruals, trade debtors are included in income when invoiced, regardless of receipt.
A debtor included in the final accruals-basis return that subsequently proves irrecoverable can be claimed as a post-cessation expense , a bad debt write-off , against any post-cessation receipts from the former trade. If there are no post-cessation receipts against which to offset the bad debt, relief may be available against other income of the same tax year. The claim is made on the Self Assessment return for the year in which the debt is established as irrecoverable , which may be a year or more after cessation. The timing of when a debt is formally written off, and the evidence that supports the write-off decision, are both relevant to when the relief can be claimed.
Q9: Does stopping self-employment affect a person's entitlement to NI credits towards the State Pension?
A9: Well, this is an important consideration that goes beyond the immediate tax question, and it catches many former sole traders by surprise. While self-employed, sole traders build National Insurance credits through Class 2 contributions (abolished as a compulsory payment from April 2024) and Class 4 contributions on profits above the lower profits limit. When self-employment ceases, those Class 4 contributions stop. If the former sole trader is not employed , and therefore not building NI credits through employment , their NI record may develop gaps. Each tax year without sufficient NI credits or contributions is a gap year, which can affect entitlement to the full State Pension.
A former sole trader who ceases in their fifties and does not take up employment or claim any qualifying benefits could, if they do not take action, accumulate several gap years before reaching State Pension age. Voluntary Class 3 NI contributions can fill those gaps at a cost of approximately £957 per year for 2026/27. Each qualifying year adds approximately £6.89 per week to the State Pension. The State Pension check tool on GOV.UK shows the current forecast and how many more qualifying years are needed. Former sole traders should check their NI record promptly after cessation and decide whether voluntary contributions are worth making for any gap years that arise.
Q10: What happens if a sole trader's final year overlaps with a period of PAYE employment , can the employment income affect the cessation tax calculation?
A10: In my experience, this is the most common final-year scenario , a sole trader who starts employment while winding down the business, meaning both income streams appear on the final return. The good news is that the two income streams are calculated independently: the self-employment profit covers only the trading period to the cessation date, and the employment income covers the PAYE period. They are then combined to arrive at total income, and the final tax liability is calculated on the combined figure.
The interaction that catches people out is the impact on the personal allowance and the tax bands. Self-employment profits in the cessation period, combined with PAYE income in the overlap months, can push total income well above the basic or higher rate threshold , meaning the cessation year produces a higher than normal tax bill even if neither income stream alone would have been taxable at the higher rate. Capital allowances balancing allowances in the final year can offset some of this, as can pension contributions made in the cessation year. Former sole traders who also start employment in the cessation year should model the combined income carefully before assuming their tax liability is simply the sum of the two separate calculations.
About the Author
Maz Zaheer, AFA, MAAT, MBA, is the CEO and Chief Accountant of MTA and Total Tax Accountants, (Registered with Companies House) two premier UK tax advisory firms. With over 15 years of expertise in UK taxation, Maz provides authoritative guidance to individuals, SMEs, and corporations on complex tax issues. As a Tax Accountant and an accomplished tax writer, he is renowned for breaking down intricate tax concepts into clear, accessible content. His insights equip UK taxpayers with the knowledge and confidence to manage their financial obligations effectively.
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