Business Asset Rollover Relief: how to claim CGT Rollover Relief in 2026/27

Business Asset Rollover Relief allows businesses to defer Capital Gains Tax (CGT) when they dispose of certain qualifying business assets and reinvest all or part of the proceeds into replacement business assets. Rather than paying Capital Gains Tax immediately, the gain is effectively rolled into the cost of the new asset, postponing the tax liability until that replacement asset is eventually sold or otherwise disposed of.

For many businesses, this relief provides valuable cash-flow benefits by allowing more of the sale proceeds to be reinvested into business growth instead of being used to pay an immediate tax bill. Any gain eventually crystallising is charged within the wider Income Tax and CGT framework explained in our ultimate guide to personal tax in the UK. However, the relief is only available where specific qualifying conditions are met, and a valid claim must be made within the statutory time limits.

This guide explains how Business Asset Rollover Relief works, the qualifying conditions, how to claim Business Asset Rollover Relief, and the practical steps businesses should consider before disposing of qualifying assets.

What is Business Asset Rollover Relief?

Business Asset Rollover Relief, often referred to as CGT Rollover Relief, enables businesses to postpone Capital Gains Tax when qualifying business assets are replaced with other qualifying business assets.

The relief does not eliminate Capital Gains Tax permanently. Instead, the gain arising on the disposal of the original asset is deducted from the purchase cost of the replacement asset. As a result, the deferred gain will normally become chargeable when the replacement asset is eventually sold unless further rollover relief is available.

The purpose of the relief is to encourage continued investment by ensuring that businesses are not discouraged from replacing important trading assets simply because an immediate Capital Gains Tax charge would arise.

How Business Asset Rollover Relief works

Normally, when a qualifying business asset is sold for more than its original cost, a chargeable gain arises for Capital Gains Tax purposes.

Where Business Asset Rollover Relief applies, that gain is deferred by reducing the acquisition cost of the replacement asset.

The process generally works as follows:

1. A qualifying business asset is sold.
2. A capital gain is calculated.
3. Some or all of the disposal proceeds are reinvested into another qualifying business asset.
4. The gain is deducted from the cost of the replacement asset.
5. Capital Gains Tax is deferred until the replacement asset is eventually disposed of.

This means the business can continue investing without immediately funding a Capital Gains Tax liability from the sale proceeds. This differs from Gift Hold-Over Relief, which applies where an asset is given away rather than sold and the proceeds reinvested.

Business Asset Rollover Relief eligibility

Business Asset Rollover Relief eligibility depends on several statutory conditions being satisfied.

In most cases:

• Both the original and replacement assets must be qualifying business assets.
• The assets must be used for the purposes of a genuine trading business.
• The business must be trading when the original asset is sold and when the replacement asset is acquired.
• The replacement asset must normally be purchased within the permitted time limits.
• A valid claim must be submitted to HMRC.

Meeting these conditions is essential before a Business Asset Rollover Relief claim can succeed. Where business assets are being transferred as part of a marital split, the rules on tax when transferring assets during divorce should be reviewed separately.

Which business assets qualify?

Not every asset owned by a business qualifies for rollover relief.

Examples of qualifying business assets commonly include:

• Land and buildings used in a trading business.
• Commercial premises.
• Fixed plant and machinery.
• Certain goodwill and other qualifying intangible assets where permitted by legislation.

Investment assets that are not used for trading purposes generally do not qualify.

Businesses should therefore review whether both the asset being sold and the proposed replacement asset fall within the qualifying categories before relying on the relief. Where a sole trader or partnership is instead transferring the whole business into a company, incorporation relief operates under a completely separate set of rules.

Full Business Asset Rollover Relief claims

Full rollover relief is normally available where all of the proceeds received from selling the original qualifying asset are reinvested in qualifying replacement business assets.

Where this happens:

• The whole chargeable gain is deferred.
• No immediate Capital Gains Tax is normally payable.
• The deferred gain reduces the acquisition cost of the replacement asset.

Although no immediate tax is paid, the deferred gain has not disappeared. Instead, it becomes part of the future Capital Gains Tax calculation if the replacement asset is later sold.

Partial Business Asset Rollover Relief claims

Businesses do not always reinvest all of the disposal proceeds.

Where only part of the proceeds is reinvested, a partial Business Asset Rollover Relief claim may be available.

Broadly:

• The amount reinvested may qualify for rollover relief.
• The amount not reinvested generally becomes chargeable immediately.
• Only the qualifying proportion of the gain is deferred.

This provides flexibility where a business only needs to replace part of the original investment while ensuring that Capital Gains Tax is paid on the amount of proceeds retained rather than reinvested.

Accurate calculations become increasingly important where several replacement assets are acquired or where only part of the proceeds qualifies for rollover treatment.

Provisional Business Asset Rollover Relief claims

A business may intend to buy a replacement asset but may not have completed the purchase by the time its tax return is due.

In these circumstances, it may be possible to make a provisional Business Asset Rollover Relief claim. This allows the taxpayer to defer part or all of the gain while the replacement purchase is still being arranged.

A provisional claim should be based on a genuine intention to acquire qualifying replacement assets within the permitted period. Once the purchase is completed, the claim may need to be updated to reflect:

• The actual replacement asset acquired.
• The final purchase price.
• The amount of disposal proceeds reinvested.
• Whether full or partial relief is available.

If the replacement asset is not acquired within the required period, the provisional claim may need to be withdrawn and the deferred Capital Gains Tax may become payable, together with any applicable interest.

Using sale proceeds to improve an existing business asset

You do not always need to purchase an entirely new asset to claim Business Asset Rollover Relief. In some cases, proceeds from the original disposal can be used to improve a qualifying business asset that the business already owns.

Potential qualifying improvements may include:

• Constructing an extension to trading premises.
• Making substantial structural improvements to a factory or warehouse.
• Installing qualifying fixed plant as part of a major improvement project.
• Enhancing commercial premises so they can support expanded trading activities.

The expenditure must generally improve or enhance the asset rather than simply maintain it. Routine repairs, decoration and ordinary maintenance would not normally qualify as replacement expenditure for rollover purposes.

Detailed invoices and project records should be retained to demonstrate how the expenditure improved the asset and when the costs were incurred.

Time limits for buying replacement assets

The replacement asset must normally be acquired within the statutory replacement period.

This period generally runs from:

• One year before the disposal of the original asset; to
• Three years after the disposal.

For example, if a qualifying asset is sold on 1 September 2026, the replacement asset would normally need to be acquired between 1 September 2025 and 1 September 2029.

HMRC may extend the period in limited circumstances where there is a reasonable explanation for the delay. However, businesses should not assume that an extension will automatically be granted.

Where a project is likely to take a long time, such as the purchase or construction of new commercial premises, the timing should be reviewed before the original asset is sold.

Time limit for making a Business Asset Rollover Relief claim

A Business Asset Rollover Relief claim must also be made within the relevant statutory deadline.

Broadly, the claim must normally be submitted within four years from the end of the tax year in which:

• The replacement asset was acquired; or
• The original asset was disposed of, if that happened later.

For companies, the claim period is considered by reference to the relevant accounting period rather than an individual tax year.

Businesses should avoid waiting until the final deadline. Preparing the claim early makes it easier to locate purchase contracts, completion statements, invoices and evidence showing how both assets were used in the trade.

How to make a Business Asset Rollover Relief claim

The method used to claim depends on whether the taxpayer is an individual, partnership or company.

An individual or partner will normally make the claim through Self Assessment or by submitting a separate claim to HMRC. A company generally includes the relevant claim within its Corporation Tax reporting.

The claim should normally identify:

• The original asset disposed of.
• The date and value of the disposal.
• The chargeable gain arising before relief.
• The replacement asset acquired.
• The date and cost of the replacement asset.
• The amount of proceeds reinvested.
• Whether full, partial or provisional relief is being claimed.

Supporting records should be clear enough to demonstrate that the assets qualify and were used for the purposes of the trade.

When does the deferred gain become taxable?

CGT Rollover Relief defers the gain rather than cancelling it.

The deferred gain is normally reflected by reducing the base cost of the replacement asset. When that replacement asset is later sold, the lower base cost generally produces a larger chargeable gain.

The deferred gain may therefore become taxable when:

• The replacement asset is sold without a further rollover claim.
• The replacement asset ceases to meet the qualifying conditions.
• The business stops using the asset for qualifying trading purposes.
• A provisional claim is not supported by a completed qualifying purchase.

If the proceeds from the later disposal are reinvested again in another qualifying asset, it may be possible to make a further rollover claim, subject to the normal conditions.

Worked example: claiming Business Asset Rollover Relief

Oakfield Manufacturing Ltd sells a factory used in its trade for £1.1 million. After deducting the original cost and allowable expenses, the company calculates a chargeable gain of £280,000.

Within two years, the company buys a larger qualifying factory for £1.1 million and continues carrying on the same trade.

Because all of the disposal proceeds have been reinvested in a qualifying replacement asset within the permitted period, the company makes a full Business Asset Rollover Relief claim.

The broad treatment is:

• Chargeable gain on original factory: £280,000.
• Immediate taxable gain after full rollover claim: £0.
• Purchase cost of replacement factory: £1,100,000.
• Less deferred gain: £280,000.
• Adjusted CGT base cost of replacement factory: £820,000.

If the replacement factory is later sold without another qualifying rollover claim, the reduced base cost will increase the gain arising on that disposal.

Example of a partial rollover claim

Assume the same company sells its original factory for £1.1 million but spends only £950,000 on the replacement property.

The £150,000 of proceeds not reinvested may restrict the amount of relief available. Part of the original gain may therefore become taxable immediately, while the remaining qualifying gain is rolled into the replacement asset.

This illustrates why the amount reinvested must be compared with the full disposal proceeds rather than simply with the size of the gain.

Common mistakes when claiming CGT Rollover Relief

Common errors include:

• Assuming any asset owned by a business qualifies.
• Using an investment asset rather than an asset employed in the trade.
• Buying the replacement asset outside the permitted period.
• Failing to reinvest enough of the disposal proceeds for full relief.
• Treating ordinary repairs as qualifying asset improvements.
• Missing the four-year claim deadline.
• Failing to amend a provisional claim after the final purchase.
• Assuming the gain has been permanently exempted rather than deferred.
• Keeping insufficient evidence of how the assets were used.

These mistakes can result in part or all of a claim being rejected and an earlier Capital Gains Tax liability arising.

What to review before selling a business asset

Before disposing of a significant trading asset, businesses should review:

• Whether the original asset qualifies.
• Whether the replacement asset will qualify.
• The amount of sale proceeds likely to be reinvested.
• The expected purchase or improvement timetable.
• Whether a provisional claim may be needed.
• The effect of full or partial relief on future base costs.
• The relevant tax return and claim deadlines.
• The records required to support the claim.

Considering these points before contracts are exchanged gives the business greater certainty over the tax consequences and the amount of cash available for reinvestment. Business owners going through separation should also factor in the wider position on capital gains during separation and divorce, since this can affect how business assets are treated.

Key takeaways

Business Asset Rollover Relief allows qualifying businesses to defer Capital Gains Tax when proceeds from the disposal of certain trading assets are reinvested in qualifying replacement assets.

The relief can apply to full reinvestment, partial reinvestment, provisional purchases and qualifying improvements to existing assets. However, both the original and replacement assets must meet the relevant trading and asset conditions.

To claim Business Asset Rollover Relief successfully, businesses must comply with the replacement period, submit the claim within the relevant deadline and retain sufficient evidence to support the calculation.

Understanding Business Asset Rollover Relief eligibility before disposing of an asset helps businesses protect cash flow, plan replacement investment and avoid unexpected Capital Gains Tax liabilities.

Case Study: Planning a Business Asset Replacement Before Completing a Sale

A website enquiry was received by our Fulham Broadway office from the director of a manufacturing business who was planning to sell a commercial property and reinvest the proceeds into larger trading premises. They wanted to understand how to claim Business Asset Rollover Relief, whether the proposed replacement asset would qualify, and what steps were needed to defer Capital Gains Tax before completing the transaction.

Our advisers reviewed the existing business asset, the planned reinvestment, the expected timetable and the qualifying conditions for Business Asset Rollover Relief. We also provided Capital Gains Tax planning, corporation tax advice, business advisory services, year-end accounts support, and business tax planning to help ensure the disposal and reinvestment were structured efficiently. By reviewing the transaction before contracts were exchanged, the client gained a clear understanding of the claim process, the statutory deadlines and the records required to support a successful HMRC claim while keeping more capital available for future business growth.