CGT Rollover Relief: how Capital Gains Tax Rollover Relief works in 2026/27

CGT Rollover Relief, also known as Capital Gains Tax Rollover Relief, allows businesses to defer paying Capital Gains Tax when they dispose of certain business assets and reinvest the proceeds into qualifying replacement assets. Instead of paying Capital Gains Tax immediately, the gain is rolled into the cost of the new asset and usually becomes payable only when that replacement asset is eventually sold.

For many businesses, this relief provides valuable flexibility when upgrading premises, replacing equipment or restructuring operations. Rather than using part of the sale proceeds to settle an immediate tax bill, more capital remains available for reinvestment. 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 subject to detailed qualifying conditions, time limits and claim requirements that should be understood before completing a transaction.

This guide explains how CGT Rollover Relief works, which assets qualify, the conditions that must be met and how businesses can defer Capital Gains Tax while continuing to invest in growth.

What is CGT Rollover Relief?

Capital Gains Tax Rollover Relief enables businesses to postpone Capital Gains Tax when they sell qualifying business assets and use the proceeds to acquire other qualifying business assets.

The relief does not remove the Capital Gains Tax liability altogether. Instead, the gain is deducted from the acquisition cost of the replacement asset. This means the deferred gain is normally brought into account when that replacement asset is eventually sold without further rollover relief.

The relief is designed to encourage businesses to continue investing in productive assets without creating an immediate tax charge simply because one qualifying asset has been replaced with another. This is distinct from Gift Hold-Over Relief, which defers CGT on assets given away rather than sold and reinvested.

How Capital Gains Tax Rollover Relief works

Normally, disposing of a business asset at a profit creates a chargeable gain for Capital Gains Tax purposes.

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

In simple terms:

1. A qualifying business asset is sold.
2. A chargeable gain arises.
3. The proceeds are reinvested in another qualifying business asset.
4. The gain is deducted from the purchase cost of the replacement asset.
5. Capital Gains Tax is deferred until the replacement asset is eventually disposed of.

This allows businesses to continue investing without immediately funding a Capital Gains Tax liability from the sale proceeds.

Which business assets qualify?

Not every asset qualifies for CGT business assets rollover treatment.

Broadly, both the asset being disposed of and the replacement asset must be qualifying business assets used within a trading business.

Examples of qualifying assets may include:

• Land and buildings used for trading.
• Commercial property.
• Fixed plant and machinery.
• Goodwill in limited circumstances.
• Certain intangible business assets where the legislation permits.

Assets held purely as investments, or assets that are not used for trading purposes, will not normally qualify for rollover relief. Business owners transferring a sole trader or partnership business into a company should also review incorporation relief separately, since it operates under its own distinct set of conditions.

Businesses should therefore review both the asset being sold and the proposed replacement asset before assuming the relief is available.

Rollover Relief eligibility

Rollover Relief eligibility depends on several statutory conditions.

In most situations:

• Both the old and new assets must be qualifying business assets.
• The assets must be used within a trading business.
• The business must normally be trading when the old asset is disposed of and when the replacement asset is acquired.
• The replacement asset must usually be acquired within the permitted time limits.
• A valid claim must be submitted to HMRC.

Failure to satisfy any of these conditions may prevent the relief from being available.

Because each transaction has its own facts and circumstances, eligibility should be reviewed before contracts are exchanged. This is separate from the specific rules on tax when transferring assets during divorce, which follow their own timescales and conditions.

Full rollover relief

Full rollover relief is generally available where the entire proceeds from the disposal of the original qualifying asset are reinvested in qualifying replacement business assets.

In these circumstances, the whole chargeable gain can usually be deferred.

Instead of paying Capital Gains Tax immediately, the deferred gain is deducted from the acquisition cost of the replacement asset.

This lower acquisition cost will increase the gain calculated if the replacement asset is sold in the future without further rollover relief.

Partial rollover relief

Businesses do not always reinvest the full amount received from selling the original asset.

Where only part of the disposal proceeds is reinvested, partial rollover relief 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 allows businesses flexibility where only part of the proceeds is needed for replacement assets while ensuring the appropriate proportion of Capital Gains Tax is paid.

Calculating partial rollover relief can become more complicated where multiple assets are acquired or improvements are undertaken. Keeping accurate records of sale proceeds, acquisition costs and qualifying expenditure is therefore essential.

Buying replacement assets

To qualify for CGT Rollover Relief, replacement assets normally need to be acquired within a specific period.

In most cases, the new qualifying asset must be purchased:

• Up to one year before the disposal of the original asset; or
• Within three years after the disposal.

HMRC has discretion to extend these time limits where exceptional circumstances prevent a business from acquiring the replacement asset within the normal period.

Businesses planning significant property or equipment purchases should therefore retain evidence explaining any delays where an extension may be required.

Using rollover relief for business improvements

Many business owners assume that rollover relief only applies when purchasing an entirely new asset. In practice, Capital Gains Tax Rollover Relief may also apply where disposal proceeds are used to improve an existing qualifying business asset.

Examples may include:

• Constructing an extension to commercial premises.
• Significantly refurbishing a factory or warehouse.
• Making permanent structural improvements to qualifying business property.

Routine repairs and maintenance normally do not qualify because they simply preserve an asset rather than improving or enhancing it.

Provisional rollover claims

Sometimes a business intends to purchase a replacement asset but has not completed the acquisition before its Self Assessment return becomes due.

In these circumstances, a provisional claim for rollover relief may be possible.

This allows the taxpayer to preserve entitlement while the replacement asset is being acquired, provided the statutory conditions are ultimately satisfied. Once the purchase has been completed, the claim may need to be reviewed or amended if the final figures differ from those originally estimated.

Time limits for claiming CGT Rollover Relief

Claiming Rollover Relief is subject to statutory deadlines.

Broadly, a claim should normally be made 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 occurred later.

Businesses should avoid leaving claims until the deadline approaches. Early preparation allows supporting documentation to be gathered while the transaction details remain readily available.

When does the deferred gain become taxable?

Rollover Relief postpones Capital Gains Tax rather than removing it permanently.

The deferred gain generally becomes chargeable when:

• The replacement asset is sold without further rollover relief.
• The replacement asset ceases to qualify.
• The relevant statutory conditions are no longer met.

Because the deferred gain reduces the acquisition cost of the replacement asset, any future disposal usually results in a larger chargeable gain than would otherwise have arisen.

Worked example: calculating CGT Rollover Relief

Sarah owns a warehouse used by her manufacturing business. She sells the property for £900,000, creating a chargeable gain of £250,000.

Within eighteen months, she purchases a larger warehouse for £900,000 which will also be used entirely for trading purposes.

Because all of the disposal proceeds have been reinvested in a qualifying replacement asset within the permitted time limit, Sarah claims full CGT Rollover Relief.

Rather than paying Capital Gains Tax immediately, the £250,000 gain is deducted from the acquisition cost of the new warehouse. The deferred gain will normally be taken into account when that replacement property is sold in the future unless further rollover relief is available.

If Sarah had reinvested only £700,000 of the proceeds, only part of the gain would generally qualify for deferral, with the balance becoming chargeable immediately.

Common mistakes with Rollover Relief

Although the relief is valuable, errors are common where transactions are completed without reviewing the qualifying conditions.

Common mistakes include:

• Assuming all business assets qualify automatically.
• Purchasing replacement assets outside the permitted time limits.
• Confusing repairs with qualifying capital improvements.
• Failing to reinvest sufficient disposal proceeds.
• Missing the deadline for making a claim.
• Keeping inadequate records of qualifying expenditure.
• Assuming the relief permanently removes Capital Gains Tax rather than deferring it.

Reviewing these issues before completing the disposal helps reduce the risk of unexpected tax liabilities or unsuccessful claims.

Planning ahead before disposing of business assets

Businesses considering the sale of significant assets should review the potential availability of Capital Gains Tax Rollover Relief before contracts are exchanged.

Key questions include:

• Does the existing asset qualify?
• Will the replacement asset satisfy the qualifying conditions?
• Will all disposal proceeds be reinvested?
• Can the replacement asset be acquired within the permitted time limits?
• Will any improvements qualify instead of a new purchase?
• Are sufficient records available to support a claim?

Addressing these questions early gives businesses greater certainty over their future Capital Gains Tax position and supports informed investment decisions. Business owners going through a marital separation should also review the wider rules on capital gains during separation and divorce, since these can affect how business assets are treated.

Key takeaways

CGT Rollover Relief enables businesses to defer Capital Gains Tax when qualifying business assets are replaced with other qualifying business assets. The relief postpones the tax liability rather than eliminating it, allowing more of the disposal proceeds to remain available for reinvestment.

Understanding Rollover Relief eligibility, acquiring replacement assets within the statutory time limits and keeping accurate records are all essential to making a successful claim.

By planning disposals carefully and understanding how Capital Gains Tax Rollover Relief operates, businesses can manage cash flow more effectively while continuing to invest in future growth.

Case Study: Reinvesting Business Sale Proceeds to Defer Capital Gains Tax

A website enquiry was received by our Wimbledon office from the owner of a manufacturing business who was planning to sell a commercial warehouse and purchase larger premises to support future growth. They wanted to understand whether CGT Rollover Relief could defer the Capital Gains Tax arising on the sale and what conditions needed to be met before committing to the transaction.

Our advisers reviewed the existing business asset, the proposed replacement property, the planned reinvestment timetable and the expected disposal proceeds to assess whether the qualifying conditions for Capital Gains Tax Rollover Relief could be satisfied. We also provided Capital Gains Tax planning, business tax planning, corporation tax advice, year-end accounts support, and business advisory services to ensure the transaction was structured efficiently. By planning the disposal and reinvestment before contracts were exchanged, the client gained a clear understanding of the available relief, the statutory time limits and the records required to support a future claim with HMRC.