Guide

UK Emissions Trading Scheme (UK ETS) compliance

Complete guide to UK ETS obligations for installations, aviation operators, and maritime operators. Covers registration thresholds, annual reporting deadlines, verification requirements, allowance surrender, and penalties.

Manufacturing & EngineeringEnergy & Utilities UK-wide

The UK Emissions Trading Scheme (UK ETS) is a mandatory carbon pricing mechanism requiring operators of high-emitting installations to monitor emissions, obtain permits, and surrender allowances equal to their verified emissions each year.

The UK ETS replaced the UK's participation in the EU ETS on 1 January 2021 and covers approximately 25% of UK territorial emissions from energy-intensive industries, power generation, aviation, and (from July 2026) maritime transport.

Do you need to register?

You must register if you operate:

  • An installation with combustion units exceeding 20 MW total rated thermal input
  • Energy-intensive industrial processes (cement, steel, refineries, chemicals, glass, ceramics, paper, aluminium)
  • Aircraft as a UK-administered aircraft operator
  • Maritime vessels of 5,000 gross tonnage or more (from July 2026)

If your installation is below emissions thresholds, you may qualify for simplified routes (Hospital and Small Emitter or Ultra Small Emitter status).

Simplified routes for low emitters

If your installation emits relatively low volumes, you may avoid the full compliance burden:

Getting a greenhouse gas emissions permit

Before you can operate under the UK ETS, you must obtain a greenhouse gas emissions permit from your environmental regulator. The permit sets out what you must monitor, how to report, and your compliance obligations.

Application process

  1. Identify your regulator: Environment Agency (England), SEPA (Scotland), Natural Resources Wales, or NIEA (Northern Ireland)
  2. Submit permit application: Via the Manage Your UK ETS Reporting (METS) service
  3. Prepare monitoring plan: Detail how you'll monitor emissions according to Monitoring and Reporting Regulation (MRR) 2018
  4. Obtain permit: Regulator reviews and issues permit with conditions
  5. Registry account opened: UK Registry Administrator opens your Operator Holding Account (OHA) once permit is issued

Allow up to 2 months for registry account opening, though it can take longer in complex cases.

Monitoring and reporting emissions

Throughout each scheme year (1 January to 31 December), you must continuously monitor emissions according to your approved monitoring plan. Your monitoring must comply with the Monitoring and Reporting Regulation (MRR) 2018.

If your operations change

You must notify your regulator by 31 December if changes to your operations require updates to your monitoring plan. This could include:

  • Installing new equipment
  • Changing fuel types
  • Adding or removing emission sources
  • Significant capacity changes

Obtain regulator approval for monitoring plan changes before implementing them.

Third-party verification

Your annual emissions report must be independently verified by a UKAS-accredited verifier before submission to your regulator. Verification provides assurance that your emissions data is accurate and complies with MRR requirements.

Finding a verifier

Appoint your verifier early - ideally by July - to ensure they have capacity to complete verification before the 31 March deadline. Verifiers become heavily booked in January-March as operators rush to meet deadlines.

Verifiers accredited to ISO 14065 by UKAS can be found through the UKAS website. Ensure the verifier's scope covers your installation type and emission sources.

Verification outcomes

The verifier will issue one of three opinions:

  • Verified: Emissions report is satisfactory with no material issues
  • Verified with comments: Verified but with recommendations for improvement (you may need to submit an improvement report by 30 June)
  • Not verified: Material misstatements or non-compliance found. You must resolve issues before submission.

Only reports with 'verified' or 'verified with comments' opinions can be submitted to your regulator.

Annual compliance deadlines

UK ETS operates on a strict annual cycle with mandatory deadlines. Missing deadlines triggers automatic penalties and can escalate to permit revocation.

Annual compliance checklist

For each scheme year, you must:

  • January-March: Compile emissions data, engage verifier, obtain verification opinion
  • By 31 March: Submit verified emissions report to regulator via METS
  • By 30 April: Surrender allowances equal to verified emissions
  • By 30 June (if needed): Submit improvement report if required by verifier

Critical: Mark these deadlines in your calendar at the start of each year. Set internal deadlines at least 2 weeks earlier to allow for unforeseen issues.

UK ETS Registry and allowance management

All UK ETS transactions - receiving free allocations, purchasing allowances, and surrendering them - happen through your Operator Holding Account (OHA) in the UK Emissions Trading Registry.

Managing your registry account

Your primary account representative and authorised representatives can:

  • View your account balance
  • Initiate transfers of allowances
  • Accept incoming transfers
  • Monitor transaction history
  • Update account details

Security: Two-factor authentication is mandatory. Download and configure an authenticator app (such as FreeOTP) before accessing your account. Keep backup codes secure in case you lose access to your authentication device.

Surrendering allowances

To surrender allowances for compliance:

  1. Log into the UK ETS Registry
  2. Navigate to your Operator Holding Account
  3. Select 'Surrender allowances'
  4. Enter the number of allowances equal to your verified emissions
  5. Confirm the transaction

Allowances are immediately removed from your account and cannot be recovered. Ensure you surrender the correct amount.

Obtaining allowances

You can obtain UK ETS allowances through two routes: free allocation (if eligible) or purchasing at auction or on the secondary market.

Free allocation applications

Free allocation is granted in multi-year periods. The current allocation period (2021-2025) has closed. The next allocation period (2027-2030) will open for applications in 2025-2026.

If you receive free allocation, it's credited to your registry account on or before 28 February each year. However, free allocation rarely covers 100% of emissions - you'll typically need to purchase additional allowances.

Purchasing at auction

Bi-weekly auctions are the primary way to purchase UK ETS allowances. To participate:

  1. Open a UK ETS Registry account (OHA or trading account)
  2. Register with ICE Futures Europe as a bidder (contact sales-utilities@ice.com)
  3. Submit bids during auction windows
  4. Pay for successful bids according to ICE settlement terms
  5. Allowances are credited to your registry account after settlement

Reserve price: Bids below £22 per allowance are automatically rejected.

Secondary market

You can also purchase allowances directly from other account holders through bilateral trades. Once you agree terms:

  1. Seller initiates transfer via UK ETS Registry
  2. Buyer accepts the transfer
  3. Allowances move between accounts

The registry does not facilitate payment - this must be arranged separately between buyer and seller.

Penalties for non-compliance

The UK ETS enforcement regime is strict. Penalties are automatic for missed deadlines and calculated failures, with escalating consequences for persistent non-compliance.

Excess emissions penalty

If you fail to surrender sufficient allowances by 30 April, you face:

  • Penalty: £100 per tonne of unreturned allowances (inflation-adjusted annually)
  • Continued obligation: You must still surrender the missing allowances. The penalty does NOT cancel your obligation.
  • Publication: Your name may be published as non-compliant

This is the most severe penalty and can amount to hundreds of thousands of pounds for large installations.

Reporting penalties

Failure to submit your verified emissions report by 31 March triggers:

  • £3,750 fixed penalty
  • Plus £375 per day of continued non-compliance
  • Maximum total penalty of £33,750

Late reporting also prevents you from surrendering allowances, potentially triggering excess emissions penalties.

Avoiding penalties

To stay compliant:

  • Set internal deadlines 2-4 weeks before regulatory deadlines
  • Appoint your verifier by July (not January)
  • Maintain robust monitoring throughout the year
  • Purchase allowances well before 30 April (don't wait until the last minute)
  • Keep detailed records for 10 years
  • Notify your regulator immediately if you anticipate compliance difficulties

If you discover an error after submission, correct it promptly. Self-reported errors typically receive reduced penalties.

  1. Determine if UK ETS applies to your operations

    Check if your installation exceeds 20 MW thermal input or operates in covered sectors. Consider maritime and aviation thresholds if applicable.

  2. Identify your environmental regulator

    England (Environment Agency), Scotland (SEPA), Wales (NRW), Northern Ireland (NIEA), or offshore (OPRED).

  3. Apply for greenhouse gas emissions permit

    Submit permit application via Manage Your UK ETS Reporting (METS) service with monitoring plan.

  4. Open UK ETS Registry account

    Registry Administrator opens your Operator Holding Account once permit is issued. Set up two-factor authentication.

  5. Implement monitoring procedures

    Monitor emissions throughout the scheme year according to approved monitoring plan and MRR 2018.

  6. Appoint UKAS-accredited verifier by July

    Engage verifier early to ensure capacity. Do not wait until January - verifiers are heavily booked near deadlines.

  7. Submit verified emissions report by 31 March

    Obtain verification opinion, resolve any issues, and submit report via METS before deadline.

  8. Surrender allowances by 30 April

    Log into UK ETS Registry and surrender allowances equal to verified emissions. Ensure you have sufficient allowances.

  9. Purchase allowances at auction or secondary market

    Register with ICE Futures Europe for auctions or arrange bilateral transfers. Purchase well before surrender deadline.

  10. Keep records for 10 years

    Retain all monitoring data, emissions reports, verification opinions, allowance transactions, and regulatory correspondence.

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