US UK Accountants: Compulsory Purchase Tax for US Owners

When a UK authority compulsorily acquires land owned by a US citizen, the compensation is taxed twice over, in two separate systems. HMRC treats it as a capital gains disposal that can be rolled over into new land under TCGA 1992 s247. The IRS treats it as an involuntary conversion deferrable under IRC section 1033, with different rules, deadlines and currency.

For an American who owns country land, a let building, part of a farm or a strip of garden in Britain, a compulsory purchase order (CPO) is rarely a one-line tax event. Specialist US UK Accountants look at it as several separate payments. There is the price of the land, severance compensation for loss in value of the land you keep, disturbance, possibly a home loss payment, statutory interest, and often a large advance payment years before the final figure is settled. Each element has its own treatment on each side of the Atlantic. This guide covers how Jungle Tax prepares both returns for these clients, where the two reliefs line up, where they do not, and how to correct the position if compensation has already gone unreported.

Why is compulsory purchase compensation so complicated for a US citizen?

A UK resident landowner deals with one tax authority. A US citizen deals with two, and the US taxes worldwide income whatever your residence. Most published guidance on compulsory purchase tax is written either for British farmers or for American owners whose land is taken by a US agency. Neither covers the situation where UK land is taken and the owner files a Form 1040. In that case:

• The disposal date differs. The UK fixes the disposal at the date compensation is agreed or determined. The US generally taxes a cash-basis individual when payments received exceed basis, which can happen years earlier through an advance payment.
• The reinvestment rules differ. UK roll-over relief accepts almost any land except a main home. US section 1033 accepts property that is similar or related in service or use, or like-kind real property for condemned business or investment real estate, including a qualifying main home.
• The currency differs. UK gain is computed in sterling. US gain is computed in dollars, with the cost translated at historical exchange rates and the proceeds at the rate on the date received. A sterling gain of zero can be a dollar gain of six figures.
• The reliefs are elective and do not bind each other. Claiming s247 in the UK does not make a section 1033 election in the US, and the reverse is equally true. Deferring in one country while paying tax in the other creates a foreign tax credit timing problem that has to be managed deliberately.

The UK side: how HMRC taxes compulsory purchase compensation

The land price is a disposal for capital gains tax

Compensation for the land itself is consideration for a disposal under ordinary capital gains tax principles. The gain is the compensation less the base cost and allowable enhancement expenditure, plus a deduction for the costs of the claim that are not reimbursed by the acquiring authority. For individuals, CGT on all assets is charged at 18% and 24% following the October 2024 Budget, and the annual exempt amount is £3,000. A UK resident pays CGT on the gain in the normal way. A non-UK resident American is within the scope of UK tax on all UK land and property, under the non-resident capital gains rules that have covered residential property since 2015 and all UK land since April 2019. Non-residents can usually rebase to the April 2015 or April 2019 value.

When is the disposal under a CPO?

Timing drives which tax year the gain falls into, which rates apply and when reliefs must be claimed. Under TCGA 1992 s246, where land is acquired by an authority exercising compulsory powers other than under a contract, the disposal takes place when the compensation is agreed or otherwise determined, for example by the Upper Tribunal. A later variation on appeal is ignored. Where the owner signs a contract with the authority, perhaps after negotiation under threat of the order, the ordinary contract-date rule in s28 applies instead. HMRC sets this out in its Capital Gains Manual at CG72101.

In practice, under a general vesting declaration, title can pass to the authority and an advance payment of most of the estimated compensation can be made long before the final figure is agreed. For UK purposes the disposal waits for the agreement. That is the first point at which the two systems part company.

Small part disposals: no immediate gain when only a sliver is taken

Road widening and rail schemes often take a narrow strip from a much larger holding. Under s243, if the land taken is small compared with the whole holding, it is not a wasting asset, and you took no steps to advertise or otherwise make known a willingness to sell (steps more than three years earlier are disregarded), you can claim that no disposal arises. The compensation is deducted from the base cost of the holding and taxed later when the remainder is sold. HMRC generally regards "small" as 5% or less of the value of the holding, or £3,000 or less, although larger cases are a question of fact and degree. The claim deadline for an individual is one year after 31 January following the tax year of disposal. See HMRC's guidance at CG72200.

Roll-over relief on compulsory acquisition under s247

Section 247 is the main relief, and it is wider than many owners expect. The old land does not have to be a business asset or farmland, and the new land does not have to be used in a trade. The conditions, summarised in HMRC's Capital Gains Manual at CG61900, are:

• the land is disposed of to an authority that has or is exercising compulsory powers, whether or not a formal order is ultimately made;
• the landowner did not take any step, by advertising or otherwise, to make known a willingness to dispose of the land;
• the consideration, which can include severance compensation, is reinvested in other land that is not "excluded land";
• the new land is acquired within the usual roll-over window, generally from 12 months before to three years after the disposal, which HMRC can extend on request.

If all the consideration is reinvested, the whole gain is deferred and the base cost of the new land is reduced by the same amount. If only part is reinvested, the amount not reinvested is charged immediately, up to the amount of the gain. Relief can be claimed provisionally once an unconditional contract for the new land is signed.

The dwelling-house exclusion

Under s248, new land is excluded if it is a dwelling house, or part of one, and a sale within six years of acquisition would qualify wholly or partly for principal private residence relief. Put simply, compensation for a let building or a field cannot be rolled into a new main home. If the replacement becomes your main residence within six years, the relief is withdrawn, and HMRC can adjust outside the normal time limits. The US rule here is more generous, so this is one of the sharpest mismatches between the two systems.

Severance, injurious affection, disturbance and home loss

Compensation is rarely a single figure. A typical settlement breaks into several heads of claim, each treated differently:

• Severance and injurious affection for the fall in value of land you keep is treated under s245 as a part disposal of the retained land, with the ordinary part-disposal computation. The small part disposal rules can apply, and severance can count towards the consideration reinvested for s247.
• Disturbance covers losses such as removal costs, temporary loss of profits, loss of goodwill and professional fees. Amounts that are taxable as income, such as temporary lost profits or stock losses, are taxed as trading income and kept out of the CGT computation. Compensation for goodwill is a capital receipt for an individual. Reimbursed expenses generally follow the expense they reimburse.
• Home loss payments to owner-occupiers, together with basic and occupier's loss payments to other owners, are statutory payments calculated as a percentage of market value within capped limits. They are generally treated as outside the charge to tax, but the position should be checked against the specific payment.
• Statutory interest on compensation paid late is income, not capital, and is taxed as savings income.

The acquiring authority's settlement letter frequently does not separate these heads clearly. A careful allocation, agreed in writing where possible, is the foundation of both returns.

UK reporting deadlines

A non-resident disposing of any UK land, and a UK resident disposing of residential property with tax to pay, must normally file a UK property disposal return and pay the estimated tax within 60 days of completion. The disposal must also go on the Self Assessment return where one is required. In a CPO the "completion" date is not always obvious, so establish it as soon as the compensation is agreed rather than when the money arrives.

The US side: IRC section 1033 involuntary conversion by condemnation

Does a UK compulsory purchase count as a condemnation?

Yes. Section 1033 applies to property compulsorily or involuntarily converted "as a result of" seizure, requisition or condemnation, or the threat or imminence of it. Nothing in the statute limits it to a taking by a US government. A sale to the authority under threat of a CPO qualifies where an authorised representative has told you the property will be acquired and you have reasonable grounds to believe it will be taken if you do not sell. IRS Publication 544 sets out the framework (Sales and Other Dispositions of Assets).

Computing the dollar gain

The US gain is the net condemnation award less adjusted basis. The net award is the total award less the expenses of obtaining it and any special assessments the authority withholds. Amounts the authority pays directly to a mortgage lender still count as received. Separately stated interest is ordinary income. Every figure is converted to US dollars: cost at the exchange rate when you bought, improvements when made, and proceeds when received. For a rental building, depreciation claimed or allowable on the US return reduces basis and produces unrecaptured section 1250 gain taxed at up to 25%. The UK has no equivalent recapture, so the US gain can be larger than the UK gain before currency is considered.

Severance damages on the US return

Where only part of a holding is taken, US severance damages are handled differently from the UK part-disposal approach. Net severance damages first reduce the basis of the retained property, and only the excess is gain. That excess can itself be deferred under section 1033 if it is spent restoring the retained property or on qualifying replacement property. IRS guidance expects the split between the award and severance damages to be fixed in writing. Without that, the IRS can treat the whole payment as the award for the land taken.

Replacement property and the replacement period

To defer the whole gain, you must buy qualifying replacement property costing at least the amount realised. Any shortfall is taxable up to the amount of the gain. Qualifying property is generally property similar or related in service or use. For condemned real property held for productive use in a business or for investment, like-kind real property also qualifies, which in practice lets you replace a let building with farmland or the reverse. IRS Publication 544 states that the rule treating US and foreign real property as not like-kind does not apply to condemnation replacements, so UK or US real estate can generally serve as replacement. Confirm this against your facts before committing funds.

The replacement period starts on the earlier of the disposal date or the date the threat of condemnation began. It generally ends two years after the close of the first tax year in which any part of the gain is realised. That becomes three years for condemned real property held for business or investment, and the IRS can grant a further extension on application, usually of up to one year.

Making the election

The election is made by attaching a statement to the return for the year the gain is realised. The statement describes the conversion, the award, the computation of gain and, if already bought, the replacement property. If replacement happens in a later year, a further statement with the replacement details goes on that year's return. If you do not replace within the period, or spend less than the amount realised, you file an amended return for the year the gain was realised and pay the tax and interest. Business and investment property is reported on Form 4797 or Form 8949 and Schedule D as appropriate. The basis of the replacement property is its cost less the deferred gain, which carries the deferred gain forward into the new asset.

A main home taken under a CPO

If the property taken was your main home, the US lets you combine the section 121 exclusion of up to $250,000, or $500,000 for qualifying married couples filing jointly, with section 1033 deferral of any excess. The replacement home must cost at least the amount realised less the excluded gain. In the UK, principal private residence relief usually removes the gain on a home that has always been your main residence, but s248 stops any taxable balance from being rolled into a new home. The result is that one country may exempt the gain on a home while the other taxes some of it, or the reverse.

US vs UK: how the two reliefs compare

Why the two reliefs rarely line up in practice

Timing mismatch and the foreign tax credit

Take an American owner of an English let building whose land vests in the authority in 2025, with an advance payment that exceeds dollar basis in the same year. Final compensation is agreed in 2027. The US gain is generally realised in 2025, and the replacement clock starts then. The UK gain falls in 2027. If the owner pays UK CGT in 2027 and has already paid US tax for 2025, the UK tax has to be credited back against the 2025 US liability through an amended return. Missed, that credit can be lost or left stranded. Under the US-UK income tax treaty, the UK keeps primary taxing rights over UK land. The US taxes its citizens regardless, under the saving clause, and gives credit for the UK tax.

Deferral in one country, tax in the other

Because the reliefs are independent, the common outcomes are uncomfortable. Reinvesting in a UK home defers nothing in the UK (s248) but can defer US gain. Reinvesting in UK farmland can defer both. Reinvesting in a US rental property defers US gain, and may defer UK gain only if UK roll-over relief accepts land outside the UK, which needs separate confirmation. Small part relief in the UK has no US counterpart. Where tax is paid in one country now and deferred in the other, the foreign tax credit for the eventual tax may arise in a different year from the US tax it should offset. The ten-year carryforward and one-year carryback for foreign tax credits usually solve this, but only if they are tracked year by year.

Currency gain and the sterling mortgage

A strong dollar at purchase and a weaker one at receipt can create US gain on property that made no sterling gain. Section 1033 can defer that gain too if the full dollar amount realised is reinvested. A less obvious trap is the sterling mortgage. When the authority repays your UK loan out of the compensation, a fall in sterling since the loan was drawn produces a foreign currency gain on the debt under section 988. That is ordinary income and is not deferred by section 1033. On a personal-use loan, the equivalent loss is not deductible.

US-only reporting knock-on effects

Compensation paid into UK bank accounts can push aggregate foreign balances above the $10,000 FBAR threshold and the Form 8938 thresholds. Interest on compensation is reportable income, and if part of the award is invested in UK funds while a replacement is found, those funds may be passive foreign investment companies. Directly held UK real estate is not itself reported on Form 8938, but the accounts the money passes through are. Our FBAR penalty calculator shows what is at stake if those accounts were omitted.

A worked step-by-step approach

1. Collect the documents. The order, notices, vesting declaration, advance payment correspondence, settlement agreement and the authority's breakdown of heads of claim.
2. Fix the dates. Establish the date of the threat of condemnation for the US, the s246 or contract date for the UK, and the date of each payment.
3. Allocate the compensation. Split it between land, severance, disturbance, home or basic loss payment, interest and reimbursed fees, ideally in writing with the authority.
4. Compute both gains. The sterling gain under UK rules, including non-resident rebasing where relevant, and the dollar gain with historical exchange rates and depreciation adjustments.
5. Test each relief. s243 small part, s247 roll-over and PRR in the UK. Section 1033 and section 121 in the US. Map the reinvestment plan against both windows.
6. File and claim. The UK 60-day return where required, the Self Assessment claim, and the US election statement with any foreign tax credit computation on Form 1116.
7. Diarise the follow-up. Replacement deadlines, the six-year dwelling-house watch, and any amended US return once UK tax is finalised.

What if the compensation was never reported?

We regularly meet American landowners who treated a CPO payment as "compensation, not income" and left it off one or both returns. Others claimed s247 in the UK and assumed the US followed. The position can be corrected cleanly.

Correcting the US position

If the replacement period is still open, a late section 1033 election may still be possible through an amended return with the required statement. Where the gain should have been reported and was not, Form 1040-X is the route for a single error. Where the omission sits alongside unfiled years, missing FBARs for the accounts that received the compensation, or unreported UK interest and funds, the IRS Streamlined Filing Compliance Procedures are usually the better path for non-wilful taxpayers. Non-residents use the Streamlined Foreign Offshore Procedures, which carry no miscellaneous offshore penalty. See our IRS streamlined filing team for how that process works.

Correcting the UK position

A Self Assessment return can be amended within 12 months of the filing deadline. After that, an omitted gain is usually disclosed to HMRC through its digital disclosure service, with interest and any penalty mitigated by an unprompted, complete disclosure. Late UK property returns carry their own penalties. A s247 or s243 claim may still be available if made within the statutory time limit, which can substantially reduce the tax due on disclosure.

Why US UK Accountants for compulsory purchase cases

Land compensation advisers negotiate the award. They rarely prepare the US return. Domestic accountants can claim s247 but do not usually model the dollar gain, the section 1033 window or the foreign tax credit sequencing. Our US tax services and UK tax services teams prepare both returns together, so the allocation, dates and reliefs match on each side. For clients with several properties or significant reinvestment, our high-net-worth practice coordinates the compliance timetable across both years and both currencies. Readers dealing with destroyed rather than condemned property may also find our guide to insurance proceeds and section 1033 useful.

Arrange a confidential review

If part of your UK land is being taken, or compensation has already been paid and you are unsure it was reported correctly in both countries, the time to act is before the replacement windows close. Jungle Tax prepares the UK and US returns, makes the elections and claims, and corrects past omissions discreetly. Contact our cross-border team for a confidential consultation and a clear plan for both returns.