Established the legal methodology for calculating and verifying carbon emissions for goods imported under the UK Carbon Border Adjustment Mechanism starting January 2027.

These regulations establish the technical framework for calculating emissions embodied in goods imported into the UK under the Carbon Border Adjustment Mechanism (CBAM).

The document directs importers to determine emissions using either Treasury-published default values or a multi-step calculation based on verified emissions data from the production installation.

It authorizes HM Revenue and Customs (HMRC) and the Treasury to publish notices specifying monitoring methodologies, verification standards, and accreditation requirements for independent verifiers.

These rules apply to registered and registrable persons importing goods such as cement and fertilizers, as well as the operators of the installations where these goods are produced.

Adjusted the initial registration deadlines and accounting periods for the new UK carbon import tax system.

These regulations establish temporary administrative rules for the introduction of the UK Carbon Border Adjustment Mechanism (CBAM) between January 2027 and June 2028.

They direct HM Revenue and Customs (HMRC) to apply modified registration deadlines, accounting periods, and payment dates for importers who trigger CBAM liabilities during the initial rollout.

The measures apply to any person or business importing carbon-intensive goods that fall under the scope of the Finance Act 2026.

Established a formal tax settlement scheme for individuals and employers to resolve outstanding loan charge liabilities and associated inheritance tax issues.

These regulations establish the Loan Charge Settlement Scheme, providing a framework for individuals and corporate employers to settle liabilities arising from certain loans or quasi-loans treated as employment or trading income.

The instrument directs HM Revenue and Customs (HMRC) to identify eligible persons, calculate settlement offers using prescribed methodologies, and manage the collection of settlement amounts as Crown debts.

It applies to taxpayers liable for loan charge amounts under the Finance (No. 2) Act 2017, excluding those suspected of being tax arrangement promoters, and introduces specific inheritance tax exemptions for those who enter into a settlement agreement.

Exempted specific classes of tax advisers, including IOSS representatives and local government tax specialists, from the requirement to register with HMRC.

These Regulations expand the list of exceptions to the mandatory tax adviser registration regime established by the Finance Act 2026.

They exempt individuals acting as Import One Stop Shop (IOSS) representatives for Northern Ireland VAT, advisers dealing with taxes not payable to HMRC such as council tax, and those providing property valuations through the Valuation Office. The requirements apply to tax advisers interacting with His Majesty's Revenue and Customs, narrowing the scope of who must register under the national regime starting 17 August 2026.

Established the formulas for calculating UK CBAM rates and defined the verification procedures for importers to claim relief for carbon prices paid abroad.

These Regulations establish the technical framework for determining the UK Carbon Border Adjustment Mechanism (CBAM) rate and the eligibility for carbon price relief starting 1 January 2027.

The instrument directs HM Revenue and Customs and the Treasury to oversee calculations based on UK Emissions Trading Scheme auction prices and sets strict verification standards for importers seeking to reduce their CBAM liability.

It applies to importers of specified carbon-intensive goods, requiring them to calculate an effective carbon price paid in the country of origin and maintain comprehensive records for six years.

Established a framework for HMRC to use electronic communications by default for specified tax matters and mandated the provision of digital contact details by service users.

These Regulations authorize the Commissioners for His Majesty's Revenue and Customs (HMRC) to designate specific taxation matters as 'default digital matters,' enabling the agency to use electronic communications with taxpayers by default unless they formally opt out.

The instrument requires individuals using HMRC online services for these matters to provide and maintain accurate digital contact details, such as email addresses.

It applies to any person or entity interacting with HMRC's digital services and empowers the Commissioners to suspend service access for those who fail to provide required contact information without a reasonable excuse.

Set the commencement dates and transitional registration rules for the mandatory HMRC registration of tax advisers.

These Regulations establish the commencement dates for the mandatory registration of tax advisers under the Finance Act 2026 and provide transitional arrangements for existing practitioners.

The order introduces a staggered implementation schedule, dividing tax advisers into four tranches based on their current HMRC digital credentials and the specific types of services they provide, such as payroll or regulated financial activities.

The Treasury directs that advisers with an existing Agent Services Account be automatically deemed registered as of 18 August 2026, while other advisers must comply by specific deadlines ranging through April 2027.

Established administrative procedures, registration requirements, and record-keeping standards for the UK Carbon Border Adjustment Mechanism starting January 2027.

These regulations establish the administrative framework for the UK Carbon Border Adjustment Mechanism (CBAM), detailing the requirements for persons importing CBAM goods into the United Kingdom.

The document directs importers to register with HM Revenue and Customs (HMRC), maintain specific records for six years, and submit returns containing commodity codes, product weights, and origin data.

It further authorizes HMRC officers to estimate the weight of goods for tax purposes if records are insufficient and sets strict conditions for reimbursement arrangements to prevent the unjust enrichment of claimants.