Compulsory Purchase Orders: How CGT Roll-Over Relief Defers the Gain

Road schemes, rail projects and regeneration compulsory purchase orders don't ask a landowner whether it's a convenient time to sell. But the tax system still treats the disposal as if it were: compensation received under a CPO is chargeable consideration for Capital Gains Tax exactly like a voluntary sale, on the same completion-date timing and the same 60-day reporting rules for residential property. The one thing that does change is the relief on offer — and it's a relief that's easy to miss because most advisers only reach for it once or twice in a career.

Why a compulsory sale still creates a taxable gain

There's a common assumption that being forced to sell somehow takes a transaction outside the scope of Capital Gains Tax. It doesn't. HMRC's position, confirmed in Statement of Practice 13 (1993) and the Capital Gains Manual, is that compensation for the land itself is ordinary disposal consideration, taxed on the normal rules for the asset in question. Compensation paid separately for disturbance, severance of retained land, or injurious affection to land you keep can attract different treatment — some of it capital, some of it potentially outside CGT altogether — so a compensation notice that bundles several heads of claim together needs unpicking before the tax return is prepared, not after. The point that catches people out is simpler: a landowner served with a CPO on a site earmarked for years of future development can find decades of latent gain crystallising in a single tax year, with no say over the timing.

The roll-over relief that exists specifically for this

TCGA 1992 section 247 gives roll-over relief where land is disposed of to a body exercising, or with the power to exercise, compulsory purchase powers, and where the landowner didn't independently advertise the land or negotiate a sale outside that process. Three conditions matter in practice: the buyer must genuinely be an authority with compulsory powers (not just any public body), the sale mustn't look like a voluntary disposal that the authority happened to be the buyer for, and the consideration has to be applied in acquiring other land or buildings, including the acquisition of a lease. Structured correctly, the relief lets the gain be rolled into the base cost of the replacement land rather than taxed at the point of the original disposal — the tax isn't cancelled, but it's deferred until the replacement asset is eventually sold without a further roll-over.

The reinvestment window and what counts as replacement land

The replacement acquisition has to fall within a defined window: starting 12 months before the date of the original disposal and ending 36 months after it. That's a materially wider window than the equivalent business asset roll-over relief under section 152, which reflects the reality that compensation negotiations and completion can drag on for years after a CPO is first confirmed, so landowners are sometimes reinvesting ahead of receiving the final payment. One restriction bites hard for anyone thinking of using the compensation to buy a home rather than replacement business or investment land: relief is denied if the new land is a dwelling-house that would itself be eligible, in whole or in part, for private residence relief, or becomes one within six years of acquisition. The relief is aimed squarely at business, investment and development land, not at converting compulsory purchase compensation into a CGT-sheltered home.

Where section 248 comes in for a dwelling

Section 248 extends the mechanism to cover the situation where the property compulsorily purchased was, or included, the owner's main residence. Private residence relief will usually exempt the gain on the residence itself automatically, but it won't reach any element of the compensation that reflects hope value, development potential, business use of part of the property, or garden and grounds beyond the area HMRC accepts as reasonable for the enjoyment of the house. Section 248 lets that excess be rolled over into replacement land by election, rather than simply becoming chargeable. It isn't a bigger relief than section 247 — it's the same mechanism, extended so that a dwelling doesn't fall outside it purely because private residence relief already covers most of the gain.

What this means in practice

A CPO notice is not the moment to start thinking about the tax position; by the time compensation is agreed, some of the planning options have usually already narrowed. Landowners facing a compulsory purchase, particularly on sites with meaningful development or hope value baked into the compensation figure, should get the roll-over conditions checked against the specific acquiring authority and the drafting of the compensation notice well before completion, and should have a credible plan for the replacement land purchase that fits inside the 12-month-before to 36-month-after window. Where part of a residence is involved, the section 248 election needs deciding deliberately rather than defaulting to whichever treatment the accounts software applies first.

Common questions

Does a compulsory purchase order trigger Capital Gains Tax the same way as a normal sale?

Yes. A disposal to an authority exercising compulsory purchase powers is a disposal for Capital Gains Tax purposes just like any other sale, and the compensation received (including any element attributed to disturbance or severance) is treated as consideration in the normal way. The compulsory nature of the sale doesn't change whether a gain arises; it only opens up a specific roll-over relief that a voluntary sale to the same authority would not qualify for.

What are the conditions for claiming roll-over relief on a compulsory purchase under TCGA 1992 section 247?

The land must be disposed of to an authority that possesses or could exercise compulsory purchase powers, the owner must not have taken steps to advertise or negotiate the sale independently of the authority's approach, and the consideration must be applied in acquiring other land within a window starting 12 months before the disposal and ending 36 months after it. The replacement land generally must not be, or become within six years, a dwelling that would itself qualify for private residence relief.

Can roll-over relief apply if part of the property compulsorily purchased was my home?

TCGA 1992 section 248 extends the relief to cover a dwelling that would otherwise qualify for private residence relief, but only for the part of the gain that private residence relief doesn't already exempt, for example where the compensation reflects development value beyond the permitted garden area or business use of part of the property. An election is needed, and the portion of the gain already covered by private residence relief cannot also be rolled over; the two reliefs sit alongside each other rather than duplicating.

What happens if I don't reinvest the compensation within the time limit?

If replacement land isn't acquired within the statutory window, or a valid claim isn't made, roll-over relief simply isn't available and the gain is chargeable in the ordinary way for the tax year of the original disposal. There's no separate penalty beyond the CGT itself becoming due, but interest can run from the original filing deadline if the liability wasn't reported and paid at the time on the assumption that relief would apply.

This article is general information, not personal tax or legal advice, and the rules referred to can change. Your own position depends on facts we cannot see from here — please take advice before acting on anything above.

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