UK Land Remediation Relief 2026/27: Corporation Tax and Reform

Land Remediation Relief (LRR) is a UK Corporation Tax relief for companies that incur qualifying expenditure cleaning up contaminated land or bringing qualifying long-term derelict land back into productive use. HMRC's outline says the relief can provide a 100% deduction plus an additional 50% deduction for qualifying expenditure, subject to the statutory conditions.

The relief is aimed at companies, not at individuals buying or renovating property in their personal capacity. The land, acquisition history, remediation work, company interest, evidence and claim timing all matter. A construction cost is not automatically a remediation cost, and a brownfield description is not by itself proof that LRR is available.

The government is also reviewing the relief. The 2026 reform consultation says LRR is not fully achieving its objective of incentivising remediation of derelict and brownfield land and asks for views on possible reforms. Those proposals are not the current claim rules.

What is Land Remediation Relief?

LRR provides Corporation Tax relief for qualifying expenditure incurred by a company in cleaning up land acquired from a third party in a contaminated or derelict state. HMRC's guidance covers both contaminated land and long-term derelict land, with different evidence and statutory conditions applying to each route.

For contaminated land, HMRC describes contamination connected with industrial activity that is causing, or creates a serious possibility of, relevant harm or significant pollution. Qualifying work can include establishing the level of contamination, removing it or containing it so the relevant risk is removed.

For derelict land, the company must satisfy the specific long-term dereliction test. A site being old, vacant, unattractive or difficult to develop does not automatically meet that test. Evidence of the site's condition and history is important.

Who can claim LRR?

The relief is a Corporation Tax relief. HMRC's contents guidance states that it is available where companies acquire land in a contaminated or derelict condition. Individuals and partnerships cannot claim LRR as personal taxpayers, although a company that is a member of a partnership may have a specific election route where the conditions are met.

The company should examine:

• how and from whom the land was acquired;
• whether the company holds the required interest in the land;
• whether the land was already contaminated or derelict when acquired;
• whether the work is qualifying remediation rather than ordinary construction;
• whether a connected-party or polluter restriction applies;
• which costs are supported by specialist surveys and contractor evidence; and
• which company return and accounting period will contain the claim.

Do not rely on the fact that a project is described as brownfield by a planning authority or property agent. The tax conditions and evidence requirements remain separate.

What expenditure may qualify?

The current rules distinguish remediation expenditure from ordinary development costs. Potentially relevant work can include investigating the contamination, removing contaminants, containing contamination or addressing qualifying dereliction. The detailed manual covers capital and revenue expenditure, excluded activities, the meaning of contaminated land, derelict-land rules and qualifying expenditure.

The key practical issue is cost identification. Remediation work is often included in a wider contractor invoice that also contains demolition, site preparation, construction, landscaping or infrastructure costs. The company should obtain a clear cost breakdown and preserve the technical basis for deciding which amount is eligible.

Costs should not be claimed simply because they make a site usable. Separate ordinary development costs, environmental improvements and qualifying remediation in the project accounts and evidence file.

How much relief is available?

HMRC's outline describes the current structure as:

The 100% and 50% figures describe the statutory structure, not an automatic 150% claim on every site invoice. The company must first identify qualifying expenditure and meet the land and claimant conditions. Other reliefs, grants, subsidies, connected-party rules and Corporation Tax calculations may affect the result.

A loss-making company may be able to surrender a qualifying land-remediation loss for a cash tax credit, subject to the separate tax-credit rules and claim limits. This is a company return issue, not a general cash grant for any contaminated site.

How are LRR claims made?

HMRC says it does not prescribe one particular claim form for the additional deduction. A computation reflecting the claim and submitted within the relevant time limit can be sufficient. Capital expenditure may require an election within two years of the end of the accounting period in which the expenditure is incurred.

The claim file should connect the tax computation to the project evidence. Keep:

• acquisition contracts and evidence of the land's condition at acquisition;
• environmental surveys, contamination reports and dereliction evidence;
• planning, engineering and remediation specifications;
• itemised contractor invoices and payment records;
• allocation workings separating remediation from development costs;
• records of grants, subsidies or third-party contributions; and
• board, adviser and project approvals explaining the treatment.

The claim timing and amendment window depend on the type of claim and the company's Corporation Tax return. Check the current HMRC manual and the company's filing position before submitting or amending a claim.

What is changing in the 2026 consultation?

The reform consultation follows the summary of responses published at Tax Update 2026. The government concluded that LRR is not fully achieving its objective and is exploring whether viable, cost-effective reforms could improve access and outcomes.

The consultation considers possible changes to areas such as:

• the complexity of the claim and evidence process;
• the treatment of derelict land and the long-term dereliction test;
• the “polluter pays” and connected-party rules;
• the major-interest requirement;
• the interaction with grants and other support; and
• how the relief could better help smaller businesses and marginal projects.

The consultation does not itself change the current 100% and 50% structure, create a new eligible category or guarantee that any proposed option will be enacted. The consultation page says the government intends to set out its conclusion at Budget 2026 and would legislate only if it is confident the reforms are viable and cost-effective.

Land Remediation Relief versus a development grant

LRR is a tax relief claimed through the Corporation Tax system. A grant is usually a separate funding decision with its own eligibility, application, timing and conditions. A company may need to consider both, but it must track how grant-funded expenditure interacts with the relief.

The consultation responses note that LRR generally cannot be claimed on expenditure funded by a grant, with only the non-subsidised balance potentially eligible where the conditions are met. Do not claim the same cost twice or treat a prospective grant as proof that the related expenditure qualifies for LRR.

A practical LRR review checklist

Frequently Asked Questions

Evidence and decision checks

A reliable uk land remediation relief 2026 27 review starts by fixing the tax year and the date on which the relevant event happened. Record the person's or business's status, the income or transaction category, the amount before tax, tax already withheld, and any election or claim being relied on. Do not combine a headline figure with a final liability: the result can change when another income source, a payment date, an ownership interest or a qualifying condition is added.

Keep the source documents behind every important input. Depending on the subject, that may include payslips, invoices, bank statements, contracts, provider statements, travel records, HMRC notices, payroll submissions, valuations or correspondence. Where an amount is apportioned, write down the method and retain the underlying total. If a correction is made, preserve the original figure and explain the reason, date and evidence for the replacement.

Before relying on the result, check the current official guidance for the same tax year and jurisdiction. Distinguish enacted law from a consultation, draft measure, announcement or future proposal, and record the effective date. Reconcile the final estimate to the relevant return, payroll record or HMRC account. A calculator or explanatory guide can support a decision, but it cannot replace the eligibility test or the official filing and payment process.

Evidence and decision checks

A reliable uk land remediation relief 2026 27 review starts by fixing the tax year and the date on which the relevant event happened. Record the person's or business's status, the income or transaction category, the amount before tax, tax already withheld, and any election or claim being relied on. Do not combine a headline figure with a final liability: the result can change when another income source, a payment date, an ownership interest or a qualifying condition is added.

Keep the source documents behind every important input. Depending on the subject, that may include payslips, invoices, bank statements, contracts, provider statements, travel records, HMRC notices, payroll submissions, valuations or correspondence. Where an amount is apportioned, write down the method and retain the underlying total. If a correction is made, preserve the original figure and explain the reason, date and evidence for the replacement.

Before relying on the result, check the current official guidance for the same tax year and jurisdiction. Distinguish enacted law from a consultation, draft measure, announcement or future proposal, and record the effective date. Reconcile the final estimate to the relevant return, payroll record or HMRC account. A calculator or explanatory guide can support a decision, but it cannot replace the eligibility test or the official filing and payment process.

For wider UK business-tax context, see UK Tax Changes 2027/28 and check HMRC's Land Remediation Relief manual before relying on a claim.

Official sources

• HMRC — Land Remediation Relief: outline
• HMRC — Land Remediation Relief: contents and detailed guidance
• HM Treasury — Reforming Land Remediation Relief consultation
• HM Treasury — Land Remediation Relief summary of responses
• HMRC — Land Remediation Relief claims