How Cessation of Trade Affects Your Corporation Tax

When a UK limited company stops trading, cessation of trade has an immediate Corporation Tax consequence: the accounting period ends on the cessation date, filing and payment deadlines move forward accordingly, and a wider three-year window opens for carrying trading losses back against earlier profits. Directors who keep working to the old year-end dates can miss both the payment deadline and the two-year claim window for terminal loss relief.

What Counts as the Cessation Date

The cessation date is a question of fact. HMRC looks at when the company actually stopped doing the things that generated its income: the day you delivered your last service, completed your last sale, or finished your last contract. If you ran a shop, it is the day you stopped serving customers. If you provided consulting, it is the date your final engagement ended.

Winding-up activities are not trading. Chasing outstanding invoices, selling off leftover furniture, paying creditors, and closing bank accounts are tidying up after the trade, not the trade itself. A company is treated as dormant for Corporation Tax purposes once it is no longer carrying out any business activity.¹ The distinction matters because as long as a company is still seeking new work or holding itself out as ready to serve clients, the trade has not ceased and none of the accelerated deadlines have started.

The Accounting Period Ends Immediately

The moment a trade ceases, the current Corporation Tax accounting period ends. This is not a choice. Under the Corporation Tax Act 2009, cessation of trade is one of the events that terminates an accounting period regardless of where the company sits in its normal financial year.² A company with a December year-end that stops trading on 15 June has its accounting period close on 15 June, creating a short period of roughly five and a half months.

Every deadline shifts with that new period-end. The CT600 return is due within 12 months of the cessation date. The Corporation Tax itself is due sooner, nine months and one day after the accounting period closes.³ Using the June example, the tax would be due by 16 March the following year and the return by 15 June. Directors still thinking in terms of the old December year-end can easily miss both.

Late Filing Penalties and Interest

The penalty regime makes no allowance for the confusion of closure. A CT600 that arrives even one day late attracts a £100 fixed penalty. After three months, a second £100 is added. At six months, HMRC estimates the Corporation Tax owed and charges 10% of the unpaid amount. At twelve months, another 10% penalty applies.⁴ Late payments also accrue interest at 7.75% per annum as of January 2026.⁵ For a company already winding down, those charges eat into funds that should be going to shareholders or creditors.

Terminal Loss Relief: Three-Year Carry-Back

A company that loses money in its final months of trading can reclaim tax it paid in more profitable years. The standard rule under the Corporation Tax Act 2010 lets a company carry a trading loss back against total profits of the preceding 12 months.⁶ When the trade has permanently ceased, Section 39 extends that window to three years.⁷

The terminal loss is not only the loss in the very last accounting period. It captures losses made in any accounting period that begins during the final 12 months of trading, plus a proportionate share of any loss in a period that straddles the start of that 12-month window.⁷ The carry-back offsets profits from the most recent years first before reaching further back. That ordering is statutory and cannot be rearranged to pick the most tax-efficient year.⁶

The result is a Corporation Tax refund. If your company paid tax on healthy profits two or three years ago and then bled money in its final year, terminal loss relief claws back some of that earlier tax. The claim must be made within two years of the end of the loss-making period. Miss that deadline and the refund is forfeit; HMRC will not extend the window without good reason. Only genuine trading losses qualify. Capital losses on asset disposals follow separate rules and cannot be carried back this way.

Settling Stock, Assets and Late Receipts in the Final Return

The final CT600 covers the shortened period from the start of the accounting period to the cessation date. It must be filed online, and it must flag that the trade has ceased. Directors sometimes file what looks like a normal annual return without indicating cessation, which delays processing and can result in HMRC continuing to issue notices to file for future periods that will never have any activity.

Stock on the Cessation Date

Any trading stock remaining on the cessation date is valued at open market value, meaning the price an unconnected third party would pay in an arm’s length transaction.⁸ That figure feeds into the final computation of trading profits. Where stock is sold as part of a package deal alongside other business assets, HMRC expects a just and reasonable apportionment of the total consideration rather than accepting whatever figure the sales contract assigns to stock.⁹

Stock worth significantly less than its cost pushes the final loss higher and, with it, the amount available for terminal loss relief carry-back. Stock that has appreciated, or was carried at below-market value on the balance sheet, does the opposite.

Capital Allowances and Balancing Adjustments

On cessation, every asset in the capital allowances pools is treated as disposed of. If you sell an asset, the disposal value is the sale price. If you keep an asset or give it away, use its market value on the cessation date. The difference between disposal value and the remaining pool balance produces either a balancing charge, which is added to taxable profits, or a balancing allowance, which is deducted.¹⁰ For main and special rate pools, a balancing allowance is only available when the trade ceases, so cessation is the one chance to recover any remaining unclaimed capital expenditure.

Watch for assets sitting on a nil pool balance. If Annual Investment Allowance or a first-year allowance brought the pool to zero and the asset is later sold or retained at cessation, the full disposal value becomes a balancing charge.¹⁰ Expensive equipment that was fully written down in earlier years can hold significant market value and create an unexpected tax bill.

Money That Arrives After Cessation

Sums received after the trade has ended do not escape Corporation Tax simply because the company is no longer trading. The Corporation Tax Act 2009 defines a post-cessation receipt as any sum received after permanent cessation that arises from the carrying on of the trade before it stopped.¹¹ The commonest example is a customer paying an invoice outstanding on the cessation date. The category also catches debts previously written off that are later recovered and insurance payouts relating to pre-cessation events.

These receipts are taxed as a separate charge rather than folded into trading profits. The company can deduct expenses that would have been deductible against trading profits had the trade still been running, but not expenses arising directly from cessation itself.¹² If significant late payments are expected, factor them into your timeline for closing the company. Each receipt can trigger a new Corporation Tax obligation and potentially a further return.

What the Final Return Needs to Cover

Market value of all remaining inventory on the cessation date.
Disposal values for every asset in the capital allowances pools, with balancing charges and allowances calculated.
Amounts still owed to the company that may become post-cessation receipts.
Confirmation that PAYE and National Insurance obligations have been settled and final payroll submissions made.
The terminal loss relief claim, including the loss amount and the periods it is being carried back against.

Telling HMRC the Company Is Dormant

Once the final CT600 has been filed, tell HMRC the company is dormant for Corporation Tax purposes. This can be done through GOV.UK’s online service, by phone, or by post. After HMRC accepts the dormant status, no further Corporation Tax returns are required unless HMRC requests one or the company starts trading again.¹³

Dormancy is not the same as dissolution. A dormant company still exists on the Companies House register and still has to file annual confirmation statements, so there is a running cost to leaving it in limbo. To remove the company entirely, you need to apply for voluntary striking off or go through a formal liquidation.

How Closure Affects Shareholder Tax

The Corporation Tax position ends with the final return and dormancy notification, but how you then close the company changes how shareholders are taxed on what is left in it. The two main routes produce very different outcomes.

Voluntary striking off is the cheaper route. Directors apply to Companies House using the DS01 form.¹⁴ Distributions made to shareholders as part of an informal winding up are normally treated as income, taxed at dividend rates that reach 39.35% for additional rate taxpayers. There is one exception: where total distributions to a shareholder do not exceed £25,000, they can qualify for capital treatment instead.¹⁵ Above that ceiling, striking off means dividend treatment on the full distribution.

A Members’ Voluntary Liquidation involves appointing a licensed insolvency practitioner as liquidator. It costs more, but distributions receive capital treatment regardless of amount, and shareholders can potentially claim Business Asset Disposal Relief. That relief charges Capital Gains Tax at 14% on qualifying gains from disposals on or after 6 April 2025, up to a £1 million lifetime limit, rising to 18% from April 2026. Without the relief, standard Capital Gains Tax rates for the 2025–26 tax year are 18% for basic rate taxpayers and 24% for higher rate taxpayers.¹⁶¹⁷

One warning applies to the MVL route: the Targeted Anti-Avoidance Rule. If you liquidate a company, receive capital treatment on the distribution, and then carry on a similar trade within two years, HMRC can reclassify the entire distribution as a dividend, removing the capital gains advantage. The rule exists to stop people extracting profits at capital gains rates, dissolving the company, and immediately starting a near-identical business.

Keeping Records After Closure

Dissolving a company does not end the obligation to keep its records accessible. HMRC can open an enquiry into a Corporation Tax return for up to 12 months after the filing deadline in normal circumstances, and much longer where there has been a careless or deliberate error. A dissolved company can also be restored to the Companies House register up to six years after dissolution, and once restored, its tax obligations revive as though it had never been struck off.

Keeping the accounting records, final computations, terminal loss relief working papers, and correspondence with HMRC for at least six years from the dissolution date is a sensible baseline. Destroying records early can turn a straightforward restoration into an expensive reconstruction exercise.

1
HM Revenue & Customs. Corporation Tax: Trading and Non-Trading
2
Legislation.gov.uk. Corporation Tax Act 2009 Chapter 2 – Accounting Periods
3
GOV.UK. Pay Your Corporation Tax Bill
4
GOV.UK. Company Tax Returns: Penalties for Late Filing
5
GOV.UK. HMRC Interest Rates for Late and Early Payments
6
Legislation.gov.uk. Corporation Tax Act 2010 – Trade Loss Relief Against Total Profits
7
Legislation.gov.uk. Corporation Tax Act 2010 Section 39 – Terminal Losses: Extension of Periods for Which Relief May Be Given
8
GOV.UK. Business Income Manual – BIM33470 – Stock: Valuation on Discontinuance of Business: General Principles
9
GOV.UK. Business Income Manual – BIM33485 – Stock: Valuation on Discontinuance of Business: Transfer to Unconnected Trader
10
GOV.UK. HS252 Capital Allowances and Balancing Charges
11
Legislation.gov.uk. Corporation Tax Act 2009 – Meaning of Post-Cessation Receipts
12
Legislation.gov.uk. Corporation Tax Act 2009 Chapter 15 – Post-Cessation Receipts
13
GOV.UK. Tell HMRC Your Company Is Dormant for Corporation Tax
14
GOV.UK. Strike Off a Company From the Register (DS01)
15
GOV.UK. Capital Gains Manual – CG64115 – Business Asset Disposal Relief: Shares/Securities
16
GOV.UK. Business Asset Disposal Relief: Eligibility
17
GOV.UK. Capital Gains Tax: What You Pay It On, Rates and Allowances