Environmental Regulations in the UK for Businesses in 2026: The Complete Guide

The UK operates its own post-Brexit environmental compliance framework. It mirrors many EU requirements but diverges in important ways. Businesses operating in the UK must comply with mandatory carbon reporting under SECR. They also need to disclose climate risks under TCFD where it applies. There are packaging fees under the UK Packaging EPR scheme. Additionally, the CMA actively enforces green claims. None of these is optional for businesses above the applicable thresholds.

If you operate in the UK, at least some of these regulations apply to your business right now. If you supply UK customers or sell products in the UK market, these regulations are relevant to you. This guide provides a map of every major UK environmental regulation for businesses in 2026, with the position as of October 27, 2026. It details the specific obligations. It also outlines the penalties. Furthermore, it explains the steps you must take to comply.

Key Environmental Regulations for Businesses in the UK (2026)

Regulation	What It Requires	Who It Applies To	Penalty
Mandatory SECR	Annual disclosure of UK energy use, Scope 1 and 2 emissions, intensity ratio, and efficiency actions in the company’s annual report	Large UK companies and LLPs as defined in the Companies Act, plus quoted companies	Director liability; audit qualification
UK SRS (Sustainability Reporting Standards)	Sustainability and climate-related disclosures aligned with ISSB IFRS S1 and S2. Final standards published February 25, 2026 for voluntary use	FCA proposes mandatory use for listed companies from accounting periods starting on or after January 1, 2027; government to consult on large private companies	None until mandated
UK TCFD Requirements	Climate-related financial risk disclosures covering governance, strategy, risk management, and metrics	UK premium-listed companies, large private companies (500+ employees, GBP 500M+ turnover), financial services firms	FCA financial penalties; prospectus liability
UK Packaging EPR	Register as packaging producer; report data by material type; pay recycling fees	Businesses handling 50+ tonnes packaging per year with GBP 2M+ turnover	Fines; compliance scheme exclusion
Biodiversity Net Gain (Environment Act 2021)	New developments must deliver minimum 10% net biodiversity gain; habitat management plan required	Most new planning applications in England (mandatory from February 2024)	Planning refusal; stop notices; enforcement notices
Modern Slavery Act 2015	Annual statement disclosing steps taken to prevent slavery in supply chains and operations	Commercial organisations with GBP 36M+ annual turnover supplying goods or services in UK	High Court injunction; public naming
UK ETS	Surrender allowances annually for GHG emissions from covered facilities	Power generators, energy-intensive industry, aviation, and maritime from 2026	GBP 100 per tonne excess + public naming
Environmental Permitting Regulations 2016	Hold and maintain environmental permits for regulated activities; comply with all permit conditions	Businesses operating regulated facilities above permit thresholds	Unlimited fines; imprisonment up to 12 months in a Magistrates’ Court and longer in the Crown Court; permit revocation
CMA Green Claims Enforcement	All environmental claims must be truthful, substantiated, and not misleading	All businesses making environmental claims to UK consumers	Up to GBP 300,000 or 10% of global annual turnover (DMCC Act 2024)
UK REACH	Register chemical substances; meet UK restriction requirements	Manufacturers and importers of chemicals and articles sold in Great Britain	Product market access denial; criminal prosecution
Plastic Packaging Tax	Pay a per-tonne rate, uprated each April, on plastic packaging with less than 30% recycled content (GBP 217.85 per tonne applied in 2024-25; check HMRC for the current rate)	Manufacturers or importers of 10+ tonnes plastic packaging per year	HMRC penalties; interest on unpaid tax

What Does Mandatory SECR Require from Your Business?

Streamlined Energy and Carbon Reporting requires large UK companies and LLPs to include specific energy disclosures. They must also include carbon disclosures in their directors’ report each year. Whether you count as large depends on the size tests in the Companies Act, which combine employee, turnover, and balance sheet criteria. The government uprated those turnover and balance sheet limits in 2025, so check the current figures with Companies House or your auditor rather than relying on older numbers.

Your SECR disclosure must include several key elements. It should cover total UK energy consumption in kWh, broken down by fuel type. The disclosure must report total Scope 1 and 2 GHG emissions in tonnes CO₂e, including a comparative year. You must provide at least one energy and carbon intensity ratio. Additionally, include a description of energy efficiency actions taken during the reporting period. Directors who approve a strategic report that misrepresents SECR disclosures can face personal liability under the Companies Act 2006. Auditors flag non-compliant disclosures during the annual audit. This can result in qualified audit opinions. Such opinions damage credit standing and harm investor relationships.

The CMA Green Claims Enforcement: What Every UK Business Must Know

The Competition and Markets Authority’s enforcement powers expanded significantly under the Digital Markets, Competition and Consumers Act 2024. Since April 6, 2025, the CMA can impose fines directly, up to GBP 300,000 or 10% of a business’s global annual turnover, whichever is higher, for misleading green claims. It does this without first needing a court order. This is the highest-risk compliance area for most UK businesses in 2026.

The CMA Green Claims Code requires that every environmental claim be truthful and accurate. The claim must also be clear and unambiguous. It should not hide or omit important information. Any comparisons it makes need to be fair. The claim should be based on the product’s full life cycle. Additionally, it must be substantiated with robust evidence. The CMA has already reviewed and secured undertakings from several major fashion and retail brands over environmental claims. Generic claims including “sustainable”, “eco-friendly”, “green”, “responsible”, “natural”, and “carbon neutral” without specific substantiation are the CMA’s primary enforcement targets.

What Happens If Your Business Fails to Comply with UK Environmental Regulations?

• Environmental permit breach: The Environment Agency (England), SEPA (Scotland), and Natural Resources Wales enforce permits. Fines are unlimited for serious offences, and permit revocation forces operational shutdown. Director imprisonment applies to knowing or reckless violations
• UK ETS non-compliance: GBP 100 per tonne excess emissions. The rate increases annually. Persistent non-compliance triggers public naming and tightened permit conditions
• SECR failures: Director personal liability under the Companies Act 2006. The FRC can require restatement of accounts. Auditors must qualify their opinion on a non-compliant strategic report
• CMA greenwashing enforcement: Fines up to GBP 300,000 or 10% of global annual turnover. Enforcement orders requiring removal or correction of claims. Public investigation announcements create immediate reputational damage regardless of final outcome
• Packaging EPR non-registration: Fines and import restrictions. Retailers that discover non-registered suppliers terminate commercial relationships to protect their own compliance position
• Modern Slavery Act non-compliance: The Home Secretary can obtain a High Court injunction, and naming and shaming enforcement has real commercial impact

To get a comprehensive view of environmental and ESG non-compliance penalties across all markets, consult our guide. See the penalties for ESG non-compliance in 2026.

Step-by-Step: Environmental Compliance for UK Businesses

• Step 1: Determine your SECR status. Check employee count, turnover, and balance sheet against the current Companies Act size tests. If you are a large company or LLP, SECR applies to your next annual report. Begin energy and carbon data collection now
• Step 2: Assess UK TCFD and UK SRS applicability. If you are premium-listed, a large private company above the 500 employee and GBP 500M turnover threshold, or in financial services, begin your disclosure programme aligned with ISSB IFRS S2, since the UK SRS builds on it
• Step 3: Register under UK Packaging EPR. If you handled 50 or more tonnes of packaging in the relevant year with GBP 2M+ turnover, register as a packaging producer and join a compliance scheme
• Step 4: Publish your Modern Slavery Act statement. If your annual turnover exceeds GBP 36 million and you supply goods or services in the UK, publish your annual statement on the Home Office registry
• Step 5: Audit your environmental permits. Review all Environment Agency, SEPA, or Natural Resources Wales permits. Confirm expiry dates and that all conditions are currently met
• Step 6: Audit all green claims immediately. Apply the CMA Green Claims Code to every sustainability claim in your marketing, packaging, and communications. Remove or substantiate every claim before any CMA contact
• Step 7: Assess UK ETS and Plastic Packaging Tax obligations. Confirm ETS participation status with the Environment Agency. Check plastic packaging content against the 30% recycled threshold and register with HMRC if above 10 tonnes per year

UK Environmental Compliance Checklist for Businesses (2026)

• Assess SECR applicability based on the current Companies Act size tests
• Begin energy and carbon data collection for SECR disclosure in the next annual report
• Assess UK TCFD and UK SRS applicability for listed status, private company size, or financial services activity
• Register under UK Packaging EPR if the above volume and turnover thresholds are met
• Publish Modern Slavery Act statement if above GBP 36M turnover supplying the UK
• Review all environmental permits for current compliance and expiry dates
• Confirm UK ETS participation status with the Environment Agency if operating covered facilities
• Audit all green claims in marketing, packaging, and communications against the CMA Green Claims Code
• Remove or substantiate all generic environmental claims (sustainable, eco-friendly, carbon neutral, green)
• Assess UK REACH registration for chemicals placed on the Great Britain market
• Assess Biodiversity Net Gain requirements for planned development projects in England
• Register with HMRC for Plastic Packaging Tax if manufacturing or importing 10+ tonnes of plastic packaging per year

To understand global environmental regulations, refer to our guide. This guide covers environmental regulations for businesses in the EU, UK, US, Canada, and India. For a full overview of ESG compliance requirements, see our ESG compliance requirements guide for businesses.

Environmental regulations in the UK for businesses in 2026 form a comprehensive and actively enforced framework. SECR and TCFD create disclosure obligations for carbon and climate. Packaging EPR creates financial obligations for any business placing packaging on the UK market. The Modern Slavery Act creates annual reporting requirements for large companies. The CMA enforces green claims against businesses of all sizes with fines up to 10% of global turnover. The Environment Agency enforces permits with unlimited fines and director imprisonment. Systematic compliance is the only rational approach. The cost of proactive compliance is always lower than the cost of enforcement.

Frequently Asked Questions

What environmental regulations apply to businesses in the UK in 2026?

UK businesses face mandatory requirements. They must comply with SECR carbon reporting if they are large companies or LLPs. They need to disclose UK TCFD climate risks if they are listed companies or large financial services firms. UK Packaging EPR fees apply to companies with 50+ tonnes of packaging and a turnover of GBP 2M+. Businesses must provide Modern Slavery Act statements if they have a turnover of GBP 36M+ or more. Environmental Permitting Regulations apply to operations above permit thresholds. UK ETS participation affects the covered industrial and energy sectors. UK REACH obligations are for chemical substance manufacturers and importers. The Plastic Packaging Tax targets businesses with 10+ tonnes of plastic packaging per year. Lastly, the CMA Green Claims Code applies to all businesses making environmental claims. Specific obligations depend on your size, sector, and the nature of your UK operations.

How does UK environmental regulation differ from EU regulation after Brexit?

The UK retained most EU environmental legislation at the time of Brexit and maintains broadly equivalent standards. Key differences: UK REACH operates separately from EU REACH and requires separate registration for Great Britain. The UK ETS operates independently of the EU ETS, with its own cap and price. The UK has no direct equivalent of the CSRD. As a result, large UK companies face SECR and TCFD rather than full ESRS reporting. The UK published its own UK SRS standards on February 25, 2026. These standards are aligned with ISSB and are voluntary for now. The FCA has proposed making them mandatory for listed companies from accounting periods starting on or after January 1, 2027, and the government is expected to consult on large private companies. Businesses operating in both the EU and UK must meet both frameworks independently.

What does the CMA Green Claims Code prohibit?

The CMA Green Claims Code sets guidelines for environmental claims. It does not prohibit specific terms. Every claim must be truthful and unambiguous. Claims must be substantiated with robust evidence and not be misleading by omission. In practice, generic claims including “sustainable”, “eco-friendly”, and “green” face enforcement risk. Claims such as “responsible”, “carbon neutral”, and “natural” also face this risk. This risk arises without specific, current, verifiable supporting data. Since April 6, 2025, the CMA has had the authority to fine businesses directly. They can impose fines up to GBP 300,000 or 10% of global annual turnover for non-compliant claims. This can be done without a court order.

Does UK Packaging EPR apply to non-UK businesses selling to UK customers?

Yes. UK Packaging EPR obligations apply to any business placing packaging on the UK market. This applies regardless of where that business is based. Non-UK e-commerce businesses shipping packaged products directly to UK consumers are subject to registration and fee obligations. These obligations apply if they exceed the 50-tonne and GBP 2 million turnover thresholds. Failure to register risks fines. It can jeopardise your ability to sell through UK retailers. It can also affect platforms that verify supplier compliance as part of their own EPR obligations.

What is the Plastic Packaging Tax, and who pays it?

The UK Plastic Packaging Tax applies to plastic packaging. It targets products manufactured or imported into the UK that contain less than 30% recycled plastic content. The rate is uprated each April, so check HMRC for the current figure per tonne. Businesses that manufacture or import 10 or more tonnes of plastic packaging per year must register with HMRC. This is required even if all their packaging meets the 30% recycled content threshold. The tax applies at the manufacturer or importer level but passes through supply chains as a cost.