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Corporation Tax guides · 5 min read

Losses in a limited company

Review limited company losses by identifying the tax loss category, available relief routes, restrictions and supporting calculations.

Jurisdiction: United Kingdom.

A loss in the accounts is not necessarily the tax trading loss. First prepare the tax adjustments and identify the loss category. Trading losses, property losses and other deficits can have different rules, so do not treat every negative balance as one interchangeable amount.

Assess current-period use, carry-back, carry-forward or group relief where relevant, with their conditions and claim requirements. Review ownership or business changes and applicable restrictions. Keep a schedule showing losses generated, used and remaining so future claims do not duplicate relief.

Establish the category and tax amount of the loss

Start with the accounting result and the tax adjustments for the relevant period. Identify whether the amount is a trading loss, property business loss, non-trading deficit or another category. Different rules may apply, so do not combine every negative figure into one pool. HMRC's trading-loss guidance describes relief routes and the need to calculate the tax loss appropriately. [1]

Keep the supporting computation and evidence of material adjustments. An accounting loss can differ from the amount available for tax relief because of disallowed expenditure, capital allowances and other matters. Directors should understand that difference before assuming a particular refund or future deduction. A software carry-forward entry is not a substitute for establishing how the loss arose.

Compare available uses and their conditions

Ask the accountant to assess current-period relief, carry-back, carry-forward or group relief where relevant. Check the conditions, ordering rules and claim deadlines for the specific loss and period. Avoid assuming every route is available or that choosing the largest immediate refund always gives the best overall result. Future profits and other reliefs can affect the comparison.

Model realistic scenarios and record the assumptions. A company expecting rapid recovery may value future relief differently from one planning to cease trade. If a group is involved, identify the legal companies, periods and required consents. Do not treat common ownership as proof that any loss can be transferred freely to whichever company currently has taxable profits.

Review changes in ownership or activity

Tell the adviser about share transactions, business acquisitions, changes in trade and cessation plans. Such changes can affect relief availability or restrictions. Keep dates and documents rather than relying on a general statement that the company is still doing roughly the same work. A loss schedule prepared before a transaction should be reviewed against the final structure and subsequent activity.

Use Asset purchase or share purchase for acquisition structure questions and Closing a company and final tax returns where closure is proposed. A buyer should not include the target's historic losses in a valuation as certain tax savings without review. Similarly, a company closing after a difficult period needs advice on final claims and timing rather than assuming unused losses will automatically produce a cash repayment.

Maintain a reconciled loss history

Create a schedule by category and period showing losses generated, claimed, used, transferred where permitted and remaining. Link each movement to the return or claim and its evidence. Reconcile the opening amount to the prior final position. Duplicated relief can arise when an amendment changes a loss but the following year's software still carries the old figure.

Keep claim decisions and submission records with the schedule. Distinguish a proposed claim from one actually made and an expected repayment from cash received. Review the effect of corrections on later periods. If an earlier loss amount is wrong, use the appropriate amendment or other route with advice rather than quietly adjusting the current balance without preserving the history.

For Company tax planning review, provide current and prior computations, ownership changes and profit forecasts. Ask for a category-specific analysis of available options and deadlines. Keep the final choice and supporting assumptions documented so future advisers understand why relief was used or preserved. The objective is accurate, non-duplicated relief based on the company's circumstances, not a promise that every accounting loss will create an immediate refund.

Reconcile losses after an amended return

An amendment to an earlier period can change the loss available for later use. Start from the accepted calculation history and identify every later claim or balance that depends on the revised amount. Do not update only the latest spreadsheet while leaving earlier supporting schedules inconsistent.

Ask the adviser to assess the relevant claim, amendment and payment consequences within the applicable rules and time limits. Keep a clear history showing the original amount, reason for change and resulting balances by category. Where an acquisition or change in activity is involved, flag that context explicitly for review. A reconciled loss schedule should explain what remains available and the basis on which it may be used, rather than present one unexplained total carried forward year after year.

Illustrative scenario

A company reports an accounting loss after recording non-deductible costs. The tax computation produces a different figure. The accountant then assesses the available trading loss relief against the company's actual periods and circumstances, rather than claiming the accounting loss automatically against an earlier tax bill.

Preparation checklist

  • Calculate the tax result from the accounts.
  • Identify each loss or deficit category.
  • Check relief routes, restrictions and claim requirements.
  • Maintain a reconciled loss history by period and use.

Frequently asked questions

Is an accounting loss the same as a tax trading loss?

Not necessarily. Apply the relevant tax adjustments and identify the loss category. Different types of losses and deficits can follow different relief rules.

Can losses always be carried back for a refund?

No. Check the available route, period, conditions and claim requirements. A negative accounting result does not by itself establish entitlement to an immediate repayment.

Do ownership changes matter?

They can. Provide transaction dates and changes in business activity for review before relying on historic losses in a forecast or acquisition valuation.

What should a loss schedule show?

Track origin, category, use, claims and remaining amounts with return references. Reconcile changes and amendments so the same relief is not duplicated in later periods.

Official sources

Sources checked: 8 September 2026. Check the linked guidance for subsequent changes.

  1. HMRC: Corporation Tax trading losses

General information only. The appropriate action depends on your circumstances and the applicable jurisdiction.

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