Land Remediation Relief: The 150% Corporation Tax Deduction Mechanics for Contaminated and Derelict Land (2026/27)

Editorial note (updated 2026-05-25): the additive framing convention for LRR uses 100 per cent standard deduction (s.1147) plus 50 per cent additional deduction (s.1149) totalling 150 per cent rather than the bare "150 per cent relief" shorthand. The companion page CTA 2009 Part 14 LRR: 100% + 50% deduction stack anchors the same architecture against the Wave 8 §28 transactions-in-UK-land cluster (developer trading-vs-investment line). Part 14 ends at section 1175 (the earlier "ss.1143-1181" range was incorrect; corrected 2026-05-25 per legislation.gov.uk verification).

Land Remediation Relief is the most generous corporation tax relief in the property cleanup space and the most procedurally narrow. The headline rate is a 150 per cent deduction on qualifying expenditure (a standard 100 per cent deduction at Corporation Tax Act 2009 section 1147 plus an additional 50 per cent deduction at section 1149). Loss-making companies can surrender the resulting qualifying land remediation loss for a payable cash credit at 16 per cent under section 1154. The relief is corporate-only, regime-agnostic between residential and commercial use, and gated on a strict polluter-pays exclusion at section 1150 that strips relief where the contamination or dereliction was caused wholly or partly by the claimant or a connected person.

This page walks the CTA 2009 Part 14 architecture, the qualifying expenditure conditions at section 1144, the contamination and derelict-land routes, the 1 April 1998 derelict-land gateway, the deduction stack of standard plus additional, the polluter-pays exclusion, the payable cash credit calculation for loss-making companies, two worked claims (a profit-making developer SPV and a loss-making investor LtdCo), and the documentation pack the claim needs to defend an HMRC enquiry.

The CTA 2009 Part 14 architecture

Corporation Tax Act 2009 Part 14 is the consolidated home of Land Remediation Relief. The relief originated in Finance Act 2001 Schedule 22 and was rewritten into CTA 2009 in the 2009 rewrite of the corporation tax code. The derelict-land extension was added by Finance Act 2009 and brought the 1 April 1998 gateway date into the statute.

Part 14 has six chapters. Chapter 1 (sections 1143 to 1146A) provides the introduction and qualifying-expenditure framework. Chapter 2 (sections 1147 to 1150) provides the reliefs for capital expenditure (the standard deduction and the additional 50 per cent deduction) plus the polluter-pays exclusion. Chapter 3 (sections 1151 to 1158) provides the surrender-for-tax-credit mechanism. Chapter 4 (sections 1160 to 1168) contains a separate strand of relief for insurance companies under the I minus E basis (basic life assurance and general annuity business or BLAGAB). Chapter 5 (section 1169) contains the anti-avoidance rule for artificially inflated claims. Chapter 6 (sections 1170 to 1175) contains the supplementary definitions including staffing costs, materials and sub-contractor treatment.

The relief is corporate-only by the gateway wording at section 1143: it applies to companies within the charge to corporation tax. Sole traders, partnerships, LLPs (which are tax-transparent for income tax purposes) and trusts are outside the scope. The corporate-only constraint is the first planning point for any contaminated-land project: a sole-trader developer or partnership needs to incorporate before the cleanup expenditure is incurred to access the relief.

Qualifying expenditure at section 1144

Section 1144 sets out six conditions on qualifying expenditure. The land must be in the United Kingdom, in a contaminated state or derelict state, and acquired by the company in the relevant state. The expenditure must be on relevant land remediation, must not be subsidised (no notional element where the company received grant funding), and must not be landfill tax incurred on disposal of the cleanup waste.

The land is in a contaminated state if relevant harm is being caused, or there is a serious possibility that relevant harm will be caused, by reason of substances in, on or under the land. Relevant harm includes harm to human health, environmental harm (water pollution, ecological damage), and damage to natural systems. The substances must be man-made or industrial in origin, not naturally-occurring features of the geology. Typical qualifying contamination includes heavy metals (lead, arsenic, cadmium), hydrocarbon contamination from former petrol stations or industrial sites, asbestos, methane and ground gas from former landfill, and radioactive material.

The land is derelict for section 1145 purposes where it is not in productive use and cannot be put back into productive use without the removal of buildings or other structures. The derelict-land route opens up cleanup expenditure on long-abandoned industrial sites, derelict buildings beyond repair, and similar structures that need full or substantial removal before redevelopment.

The 1 April 1998 derelict-land gateway

The derelict-land route has an additional condition at section 1149(3)(b) that does not apply to the contamination route. The land must have been derelict throughout the period beginning with the earlier of (i) 1 April 1998, and (ii) the date on which a major interest in the land was first acquired by the claimant company or a person connected with the claimant.

The gateway channels relief into the long-term derelict-land regeneration cohort rather than into recently-abandoned properties that might be brought back into use via ordinary capital expenditure. A property that became derelict in 2012 and was acquired in 2015 does not satisfy the gateway because the dereliction does not extend back to the 1 April 1998 reference date. A property derelict continuously since 1995 and acquired in 2024 satisfies the gateway because the dereliction extends back beyond 1 April 1998.

Evidencing the period of dereliction is the operational gate to the relief on the derelict-land route. The evidence pack typically combines council tax exemption records for empty property, planning enforcement notices, valuation office records, environment agency contamination notices, aerial photographs and Google Street View archive captures, and witness statements from local stakeholders. The pack should establish dereliction beyond reasonable doubt for the entire qualifying period.

The deduction stack: standard plus additional

Section 1147 provides the standard deduction. Where a company incurs qualifying land remediation expenditure that is capital expenditure, the section treats the capital expenditure as a deduction in calculating the profits of the trade or property business to which the expenditure relates. This first leg of the relief converts the capital cleanup spend into a current-period deduction, equivalent to immediate 100 per cent tax relief at the company's marginal corporation tax rate.

Section 1149 provides the additional deduction. The amount of the additional deduction is 50 per cent of the qualifying land remediation expenditure. The total deduction across sections 1147 and 1149 is therefore 100 per cent plus 50 per cent equals 150 per cent of the qualifying expenditure. The additional deduction at section 1149 is the headline feature of the relief and the reason LRR is more generous than the ordinary capital-expenditure routes.

The relief operates as a deduction in computing the profits of the relevant qualifying activity. For a developer LtdCo, the qualifying activity is typically a trade involving the land (the development trade); the deduction reduces trading profits subject to corporation tax. For an investor LtdCo, the qualifying activity is typically a UK property business; the deduction reduces property business profits subject to corporation tax. Where the company has insufficient profits to absorb the full deduction, the unrelieved balance contributes to a tax loss that can be carried forward, group-relieved (in a 75 per cent qualifying corporate group), surrendered for the payable cash credit under sections 1151 to 1158, or carried back in the limited circumstances allowed.

The polluter-pays exclusion at section 1150

Section 1150 is the most-tested condition on HMRC enquiry. The section strips Land Remediation Relief where the contamination or dereliction resulted wholly or partly from a thing done or omitted to be done at any time by the company or by a person connected with the company.

The wholly-or-partly trigger is broad. Even partial responsibility (the company's actions contributed to the contamination alongside an unrelated prior source) is enough to deny relief. The connected-persons definitions at CTA 2010 sections 1122 and 1123 catch parents, subsidiaries, fellow group members, directors, family members of directors, controlling shareholders, and various other connection categories. Connection is tested at the time the contaminating action was taken, not at the time of the cleanup claim.

The defensive position for the claimant company is to demonstrate that the contamination or dereliction predates its ownership of the relevant interest and was not caused by anyone connected with the claimant at the time the contamination or dereliction arose. The site investigation report from a competent environmental consultant should attribute the source of the contamination to a prior industrial use (named occupier, named industrial process, dated period of operation). The connected-persons declaration from the claimant's directors and shareholders confirms that no party in the connected-persons web was responsible for any contaminating action. The chain of title documents the acquisition of the property by the claimant from an unconnected vendor.

The payable cash credit for loss-makers: sections 1151 to 1154

A loss-making company that has incurred qualifying LRR expenditure can surrender the resulting qualifying land remediation loss for a payable cash credit from HMRC. The mechanism is at CTA 2009 sections 1151 to 1158 with the credit rate fixed at section 1154.

The qualifying land remediation loss is defined at section 1152 as the lesser of (i) the unrelieved trading loss or property business loss for the accounting period attributable to the LRR deduction, and (ii) 150 per cent of the qualifying land remediation expenditure for the period. The cap at 150 per cent of the expenditure stops the company from bundling non-LRR losses into the surrender.

The credit is calculated at section 1154 as 16 per cent of the qualifying land remediation loss surrendered. The 16 per cent rate is fixed by the statute and is varied only by Treasury order; no order has been made to vary it since the original calibration. The credit is payable in cash by HMRC under section 1151(4): an officer of HMRC must pay the company the amount of the credit on the company's claim, subject to the section 1155 conditions (chiefly that the company has filed its corporation tax return and the loss surrender is correctly claimed).

The numerical mechanic: £100,000 of qualifying expenditure produces a £150,000 total deduction (150 per cent). If the company has £150,000 of unrelieved loss attributable to the LRR claim, the qualifying land remediation loss is £150,000 and the credit is 16 per cent of £150,000 equals £24,000 payable in cash. The credit converts the LRR deduction into hard cash at 16 per cent of the deduction value (or equivalently, 24 per cent of the underlying qualifying expenditure). For loss-making developers and investors, this is the load-bearing economic feature of the relief.

Worked claim 1: Developer SPV, profit-making

Anonymised developer SPV Manchester Brownfield Holdings Limited acquires a 0.8-hectare former petrol station site in Greater Manchester in February 2026. The site has hydrocarbon contamination of the soil from the historic underground storage tanks (decommissioned in 2008). The vendor is an unconnected oil-major UK subsidiary. The site investigation report from the environmental consultant identifies the hydrocarbon source as the historic petrol station operations 1978 to 2008, predating the SPV's acquisition. The connected-persons declarations from the SPV's directors confirm no member of the connected-persons web was involved in the petrol station's operations.

The SPV incurs £180,000 of qualifying remediation expenditure in the year ended 31 December 2026: £140,000 on excavation and disposal of contaminated soil (consigned-soil disposal at a licensed landfill, with landfill tax of £15,000 included in the invoice; the landfill tax is not qualifying expenditure under section 1144 condition E so the £15,000 is stripped out; net qualifying soil disposal £125,000), £25,000 on groundwater remediation, and £30,000 on import-and-place of clean soil and capping. Total qualifying remediation expenditure £180,000 (after the £15,000 landfill tax exclusion).

The SPV is profit-making in 2026: trading profit before the LRR deduction is £450,000 (from the development of the adjacent already-cleared site sold during the year). The LRR deduction is 150 per cent of £180,000 equals £270,000. The deduction is set against the £450,000 trading profit, leaving £180,000 of taxable profit. At the main 25 per cent corporation tax rate (the SPV has been opted-out of marginal-rate relief for the year), the CT charge is £180,000 at 25 per cent equals £45,000. Without the LRR deduction, the CT charge would have been £450,000 at 25 per cent equals £112,500. The LRR saves £67,500 of corporation tax (£270,000 deduction at 25 per cent).

Worked claim 2: Investor LtdCo, loss-making

Anonymised investor LtdCo Yorkshire Property Investors Limited acquires a derelict warehouse on the outskirts of Sheffield in March 2026 for £350,000. The warehouse has been continuously derelict since 1992 (verified by council tax exemption records back to 1995 and aerial photographs from 1990 onwards through Google Earth historic imagery), satisfying the section 1149(3)(b) gateway (dereliction extends back beyond 1 April 1998 and beyond the LtdCo's acquisition date). The vendor is an unconnected family trust.

The LtdCo incurs £80,000 of qualifying derelict-land remediation expenditure in the year ended 31 December 2026: £35,000 on demolition of the derelict warehouse structure (a major-removal step required to bring the land back into productive use), £20,000 on structural-asbestos removal from the demolition debris, £15,000 on land-clearance and groundwork, £10,000 on environmental site assessment of post-demolition condition. The site is then redeveloped as a small light-industrial unit for letting; the LtdCo's property business commences with the post-redevelopment letting from January 2027.

The LtdCo has minimal income in 2026 (£5,000 from incidental garage rental at the site pre-demolition). After deducting £80,000 of revenue costs (planning fees, professional fees, finance costs), the LtdCo has a property business loss before LRR of £75,000. The LRR deduction at 150 per cent of £80,000 equals £120,000. The deduction increases the property business loss to £195,000.

The qualifying land remediation loss under section 1152 is the lesser of (i) the unrelieved loss attributable to the LRR (£120,000 if the £75,000 pre-LRR loss is treated as available against current and future property business income, which it normally is), and (ii) 150 per cent of the qualifying expenditure (£120,000). Both routes give the same £120,000 cap. The LtdCo elects to surrender the full £120,000 as qualifying land remediation loss. The cash credit under section 1154 is 16 per cent of £120,000 equals £19,200 payable by HMRC.

The LtdCo receives £19,200 in cash from HMRC, materially improving the development economics. The remaining £75,000 of unrelieved property business loss is carried forward to be set against future property business profits as the new letting income arrives from 2027 onwards. The LRR has effectively monetised the otherwise-unusable tax loss at 24 per cent of the underlying cleanup spend (£19,200 on £80,000).

Common mistakes and HMRC enquiry profile

Three mistakes account for most LRR enquiry outcomes. The first is the polluter-pays exclusion being denied without adequate connected-persons evidence: claimants who failed to document the source of the contamination and the absence of connected-persons responsibility lose the relief on enquiry. The defence is contemporaneous: the site investigation report at the time of the cleanup should attribute the source.

The second is the derelict-land gateway being missed because the period of dereliction did not extend back to 1 April 1998. Claimants on relatively recently-abandoned properties have been denied relief because they could not evidence dereliction throughout the qualifying period. The contamination route does not have the equivalent gate, so reframing a marginal derelict-land claim as a contamination claim can sometimes preserve relief where there is genuine substance contamination on a recently-abandoned site.

The third is the landfill tax exclusion at section 1144 condition E being missed in the qualifying expenditure computation. Landfill tax on the disposal of cleanup waste is not qualifying expenditure even though it is part of the cleanup invoice; the QS apportionment must strip out the landfill tax line. Claimants who include landfill tax in the qualifying expenditure produce inflated relief claims that fail the section 1144 test.

Where this page sits

This page is the Land Remediation Relief depth page sitting adjacent to the Bucket C CAA 2001 cluster. LRR is in Corporation Tax Act 2009 Part 14 and is a sister regime to the CAA 2001 reliefs rather than a part of the capital allowances code itself; the page is included in Bucket C because LRR sits operationally alongside CAA in the corporation tax relief architecture for property investors and developers. The relief is corporate-only, regime-agnostic between residential and commercial use, and operates on a 150 per cent deduction plus a 16 per cent payable credit for loss-makers.

Cross-references in the bucket: the C1 pillar establishes the four-axis decision framework for the broader capital allowances cluster; the C3 SBA page walks the structural-side relief that often stacks behind LRR on a commercial-development claim; the C6 fixtures page walks the buyer-side claim for post-remediation plant and fixtures. The full relief stack for a contaminated brownfield commercial development is typically LRR on the soil cleanup, SBA on the new commercial building shell, and capital allowances on the post-construction plant and fixtures.

The statutory citations in this page are verified against the legislation.gov.uk text on 23 May 2026. CTA 2009 sections 1144, 1147, 1149, 1150, 1151, 1152 and 1154 carry the load-bearing positions on the relief framework as enacted. The 16 per cent credit rate at section 1154 has not been varied since calibration; the 150 per cent deduction stack (100 per cent at section 1147 plus 50 per cent at section 1149) has not been varied since the Finance Act 2009 reform. The 1 April 1998 derelict-land gateway at section 1149(3)(b) is similarly stable.