NOT financial advice - seek advice from a professional for your specific situation

    TaxKilnUK tax guidance
    TaxKilnUK tax guidance

    Land Remediation Relief (LRR)

    Land Remediation Relief (LRR) gives Ltd Cos a **150% Corporation Tax DEDUCTION** on qualifying contaminated-land remediation expenditure. **LTD CO ONLY**: individuals + partnerships entirely ineligible. Three eligibility tests: (1) subject to UK Corporation Tax; (2) hold MAJOR INTEREST in the land (freehold OR lease with ≥7 YEARS remaining); (3) DID NOT CAUSE the contamination themselves. Qualifying expenditure: establishing contamination level; removal / containment of contamination (Japanese knotweed, asbestos, radon, arsenic); breaking out buried structures; treating derelict land. Both CAPITAL + REVENUE expenditure qualify, capital requires election within 2 years of end of accounting period. **Developer / trading rate**: where costs are already deductible as revenue (e.g. developer treating land as trading stock), enhanced deduction reduces to 50% UPLIFT (giving 150% total: 100% deduction + 50% extra). **Loss-making Ltd Cos**: surrender qualifying LRR losses for **16% PAYABLE TAX CREDIT**. Claim within 2 years of end of accounting period. **2025 HMRC consultation** (July-September 2025) reviewing effectiveness + abuse-resistance; scheme remains on existing terms while government reviews responses.

    Last reviewed:

    Guidance, not advice. We explain the rules, we don't assess your situation. Always seek financial or tax advice from your accountant, or contact HMRC. Read our editorial scope →

    What this relief is, in plain English

    LRR is the UK's flagship incentive for cleaning up contaminated land, designed to encourage Ltd Co property developers + commercial investors to remediate former industrial sites rather than leaving them as brownfield gaps. The 150% deduction (or 50% uplift for developer scenarios) is one of the most generous corporate-tax incentives available, reflecting the significant remediation costs typically required for genuine contamination. Ltd Co only, individuals + partnerships can't claim. Must hold the land as freehold or with ≥7-year lease remaining. Must NOT have caused the contamination themselves (preventing polluters from claiming relief for cleaning up their own mess). Three relief mechanics: (1) 150% deduction against profits (standard non-trading scenarios, investment property holders, manufacturers expanding sites, etc.); (2) 50% uplift on revenue costs (developer scenarios where land is trading stock); (3) 16% payable tax credit on surrendered loss (loss-making companies needing immediate cash flow during remediation phase). The 2025 HMRC consultation under review may change the scheme, track announcements through 2026 for any structural reforms.

    How it works

    150% deduction on qualifying remediation expenditure

    Non-trading scenarios: 150% × qualifying remediation costs = enhanced deduction against trading profits. Reduces CT bill at company's effective rate (25% main / 19% SPR / 26.5% marginal). On £100,000 of qualifying remediation: 150% × £100,000 = £150,000 deduction → £37,500 CT saved at 25% main rate.

    50% uplift for developer / trading stock scenarios

    Where remediation costs are already deductible as REVENUE expenditure (e.g. property developer treating land as trading stock), LRR adds a 50% UPLIFT on top of the 100% ordinary deduction, giving 150% total relief. £100,000 remediation: £100,000 normal trading deduction + £50,000 LRR uplift = £150,000 total deduction. £12,500 CT saved at 25% on the uplift portion (already saved CT on the underlying £100,000).

    Loss surrender for 16% payable credit

    Loss-making Ltd Cos can surrender qualifying LRR losses (the LRR-attributable portion of the company's total loss) for a 16% PAYABLE TAX CREDIT paid in cash by HMRC. Useful for remediation phase before commercial profits start. Mechanically similar to R&D Tax Credit surrender. PAYE/NIC cap may apply in some scenarios, check specifics.

    Three eligibility tests + 2-year claim window

    (1) UK Corporation Tax charge. (2) Major interest in the land, freehold OR lease with ≥7 years remaining. (3) Did NOT cause the contamination themselves. Claim within 2 years of end of accounting period, capital expenditure requires election; revenue expenditure claimed via standard CT computation. Documentation: detailed cost records, contamination evidence (environmental survey), remediation methodology + outcomes.

    Who qualifies

    Interactions with other reliefs

    SBA (Structures and Buildings Allowance)

    LRR (150%) applies to remediation EXPENDITURE; SBA (3% p.a.) applies to subsequent CONSTRUCTION on remediated land. Different cost types within same project. Common combination: LRR on £200,000 remediation + SBA on £800,000 new commercial building → combined relief substantial.

    AIA + Full Expensing

    Plant + machinery used in remediation (excavators, decontamination equipment) typically qualifies for AIA / Full Expensing on standard mechanics. LRR covers the REMEDIATION COSTS (services, materials, labour); AIA covers the EQUIPMENT used. No double-claiming on same expenditure.

    R&D Tax Credits

    R&D credit + LRR both reward specific commercial behaviours via enhanced deductions. Where remediation involves novel remediation techniques developed in-house (genuine R&D activity), the R&D portion may qualify for both R&D Tax Credit (on the R&D cost) + LRR (on the application of remediation). Careful allocation needed; specialist advice typical.

    Corporate Trading Losses

    LRR-enhanced deductions create or enlarge trading losses. Surrender for 16% payable credit OR carry forward via standard CT mechanics. Post-2017 carry-forward can offset total profits + be group-relieved.

    Common mistakes + audit triggers

    Worked example

    Linnaea, Sheffield - Director of Ltd Co property developer remediating former industrial site (2025/26)

    Linnaea's Sheffield-based Ltd Co property developer acquired a former industrial site (foundry premises) for £1.2m in 2024/25. Contamination survey identifies arsenic + petroleum residues + buried structures. Remediation costs 2025/26: £600,000 (specialist remediation contractor + environmental monitoring + buried-structure removal). Company is profitable from other developments (£2m profits 2025/26 main rate territory).

    Calculation: **Step 1: Eligibility check.** - Ltd Co within UK CT charge ✓ - Freehold ownership (acquired for £1.2m) ✓ - Did NOT cause the contamination (foundry contamination predates ownership) ✓ - Qualifying contamination (arsenic, petroleum, buried structures all qualify) ✓ **Step 2: Treatment as trading stock (developer scenario).** Land held as trading stock for development. Remediation costs deductible as ordinary REVENUE expenditure on the trading account. LRR applies as 50% UPLIFT (not full 150%). Ordinary trading deduction: £600,000. LRR uplift: 50% × £600,000 = £300,000. Total deduction 2025/26: £900,000 (150% of remediation cost). **Step 3: CT saving.** Profits without remediation: £2,000,000 → CT 25% × £2m = £500,000. Profits with remediation: £2m - £900,000 = £1.1m → CT 25% × £1.1m = £275,000. **CT saving from £600,000 remediation + LRR: £225,000.** Effective relief rate: £225,000 / £600,000 = 37.5% (vs 25% on ordinary deduction alone). **Step 4: Comparison to non-developer scenario.** If Linnaea's company were holding the land as INVESTMENT (not trading stock), LRR would give full 150% deduction (not 50% uplift). Same £600,000 remediation → £900,000 deduction (same result). The mechanics differ but the total deduction is the same, 150% effective deduction in both cases. The 50% uplift framing for developers acknowledges the underlying 100% revenue cost already being deductible. **Step 5: Specialist documentation.** - Environmental survey report identifying contamination types + extents. - Remediation methodology + contractor invoices. - Photographic + monitoring evidence of remediation completion. - Allocation between LRR-qualifying remediation + non-qualifying site preparation / construction. - Specialist environmental + tax adviser engagement (typical fee £15,000-£40,000 for substantial remediation claim, easily repaid by the relief value). **Strategic note:** The 2025 HMRC consultation may reform LRR mechanics. For projects in flight, the current 150% / 50% uplift / 16% payable credit mechanics apply. Future remediation projects should track HMRC announcements through 2026.

    Statute reference: Corporation Tax Act 2009 + Finance Act 2001 CTA 2009 ss.1143-1179. HMRC manual: CIRD60000 onwards.

    Frequently asked questions

    What happens if I miss the Self Assessment deadline?+
    The Self Assessment deadline is 31 January (online filing) for the previous tax year. Miss it and HMRC apply an automatic £100 penalty. Beyond that: £10 per day from 3 months late (capped at £900), 5% of tax due at 6 months late, and another 5% at 12 months late, under Schedule 55 of the Taxes Management Act 1970. If you have a genuine reason (serious illness, bereavement, technical issue with HMRC's systems) you can appeal with evidence; HMRC accepts reasonable excuse appeals in most genuine cases.
    Do I need an accountant or can I file Self Assessment myself?+
    Legally you can file Self Assessment yourself via gov.uk for free, most simple sole-trader returns (single income source, basic expenses) are realistic to self-file. An accountant adds real value when: your trading profit is above £40,000 (extraction-strategy decisions matter), you have multiple income streams (PAYE + self-employment + property + dividends), you've crossed the £90,000 VAT threshold, you're considering incorporation, or you have an HMRC enquiry. Expect to pay £400-£1,500/year for a typical sole-trader accountant; the cost is itself a deductible expense.
    How do payments on account work?+
    When your Self Assessment tax bill exceeds £1,000 for the first time, HMRC requires payments on account toward NEXT year's tax. Half the current bill is due 31 January (alongside the current bill); the other half is due 31 July. So your first January after crossing the threshold can hit with a double-bill: last year's balance + first payment on account. Adjust via Form SA303 if you expect next year's income to drop substantially. Payments on account don't apply if more than 80% of your tax is collected via PAYE.
    What contaminants qualify for LRR?+
    HMRC's qualifying contaminants include: Japanese knotweed + similar invasive plants; asbestos in buildings or land; radon; arsenic; lead; petroleum products; harmful pesticides + agricultural chemicals; harmful gases (methane, hydrogen sulphide); contaminated water sources; radioactive materials; mine workings + buried structures (in some cases); harmful flora + fauna where treatment costs significant. The statutory definition is broad: contamination that 'arises in whole or in part from industrial activity' OR is naturally occurring + harmful to humans / living organisms. HMRC's CIRD60005 guidance lists detailed examples. Bird droppings, casual litter, normal soil conditions don't qualify.
    I'm a property developer treating contaminated land as trading stock, what rate applies?+
    REDUCED RATE, 50% uplift (giving 150% TOTAL deduction: 100% normal deduction as revenue cost + 50% additional LRR deduction). Different from non-trading scenarios where the FULL 150% is additional deduction (effectively 250% deduction in total). The rationale: developers already get 100% relief on remediation costs as ordinary trading expenses; LRR's 50% uplift is the additional incentive on top, not a duplication of the underlying expense relief. Specialist tax advice essential for developer scenarios, the calculation + claim mechanics differ materially from investment-property remediation.
    I'm a Ltd Co loss-making in the year I incurred £200,000 remediation, can I get cash now?+
    Yes, surrender qualifying LRR losses for a 16% PAYABLE TAX CREDIT. Mechanics: £200,000 qualifying expenditure × 150% deduction = £300,000 enhanced deduction (or £200,000 × 50% uplift = £100,000 additional deduction for developer scenarios). The enhanced deduction enlarges the company's tax loss. Surrender the LRR-attributable portion of the loss for cash credit at 16%. £100,000 (the 50% additional enhancement portion) × 16% = £16,000 cash credit from HMRC. The mechanic is designed to give cash flow during the loss-making remediation phase rather than waiting for future profits to absorb the loss. Claim with CT600 + supporting documentation on remediation costs + nature of contamination. HMRC payment within ~40 days of valid claim.
    What's happening with the 2025 LRR consultation?+
    HMRC launched a wide-ranging consultation on LRR in July 2025, closing September 2025, to assess effectiveness + robustness against error + abuse. Issues raised: definition of qualifying contamination; treatment of self-caused contamination; documentation requirements; interaction with environmental permits + planning conditions; payable credit mechanic + abuse risk. As of early 2026, the scheme REMAINS ON EXISTING TERMS while the government reviews responses. Reform is possible but uncertain, could be tightening (more abuse-resistant) or substantive (new rates / scope). For projects in flight 2025-2026, the current 150% / 16% credit mechanic is locked in; future projects may operate under reformed rules. Track HMRC announcements through 2026.

    Last reviewed: