UK Climate Change Levy and Renewable Source Electricity Rules: Exemption Conditions

Key Takeaways

• Electricity supplies are exempt from the Climate Change Levy (CCL) if they are made under a contract containing a renewable source declaration (August 2026).
• A renewable source declaration confirms the amount of electricity supplied meets renewable generation criteria in each averaging period (August 2026).
• Generators of renewable source electricity must provide a written notice for their electricity to be allocated to exempt supplies (August 2026).
• "Renewable source electricity" is defined by prescribed generation manners and conditions under the Finance Act 2000 (August 2026).

What are the UK Climate Change Levy (CCL) rules for renewable source electricity?

The UK Climate Change Levy (CCL) is an environmental tax on energy use in the UK. The Finance Act 2000 Schedule 6 Part II establishes the statutory framework for this levy. It also provides specific exemptions for electricity generated from renewable sources. A supply of electricity is exempt from the levy if certain conditions are met, primarily involving a renewable source declaration within the supply contract.

The Finance Act 2000 outlines the "Exemption: electricity from renewable sources 19" within Schedule 6. This provision ensures that not all electricity supplies are subject to the CCL. Taxable supplies of electricity are generally subject to the levy unless these statutory exemptions apply.

How does a renewable source declaration enable CCL exemption?

A core requirement for CCL exemption is the presence of a "renewable source declaration" within the electricity supply contract. The Finance Act 2000 Schedule 6 Part II Paragraph 19 states that "A supply of electricity is exempt from the levy if— (a) the supply is not one that is deemed to be made under paragraph 23(3), (b) the supply is made under a contract that contains a renewable source declaration given by the supplier". This declaration is a formal statement by the supplier.

The "renewable source declaration" means "a declaration that, in each averaging period, the amount of electricity supplied" meets the criteria for renewable generation. This ensures that the exemption is tied to the actual supply of renewable electricity over defined periods. Without such a declaration in the contract, the supply would typically remain subject to the levy.

What is the role of generator written agreements in CCL exemption?

Beyond the supplier's declaration, the legislation also addresses the role of the electricity generators themselves. For electricity to qualify for the exemption, "each other person (if any) who is a generator of any renewable source electricity allocated by the supplier to supplies under the contract, has in a written notice given" their agreement. This ensures accountability and verification from the source of the renewable energy.

This requirement for a generator's written agreement provides an additional layer of assurance. It confirms that the renewable source electricity being declared by the supplier is genuinely sourced from generators who acknowledge its allocation to CCL-exempt supplies.

How are "renewable source electricity" and "averaging periods" defined for CCL?

The Finance Act 2000 provides specific definitions to clarify what constitutes "renewable source electricity" and how "averaging periods" function. Electricity is defined as "renewable source electricity" if "it is generated in a prescribed manner, and (b) prescribed conditions are fulfilled." These conditions can be broad.

The legislation specifies that "The conditions that may be prescribed under sub-paragraph (1)(c) include, in particular, conditions in connection with— (a) the giving of effect to renewable source declarations; (b) the supply of information; (c) the inspection of records". This allows for regulatory oversight to ensure compliance. The framework for "Exemption under paragraph 19: averaging periods 20 (1) This paragraph applies where a person (“the supplier”) makes supplies of electricity" establishes how these declarations are measured and verified over time. These averaging periods are crucial for the practical application of the exemption.

Who is exempt from the Climate Change Levy?

While the focus is on renewable source electricity, the Finance Act 2000 Schedule 6 also provides other exemptions. Specifically, "Exemption: supplies to domestic or charity consumers 15" means that electricity supplied to these categories of consumers is not subject to the CCL. This is distinct from the renewable source exemption but important for understanding the overall scope of the levy.

The "Meaning of “taxable commodity” 3 (1) The following are taxable commodities for the purposes of this Schedule" section clarifies what types of energy are subject to the levy. Electricity is listed as a taxable commodity, making the exemptions for renewable sources, domestic, and charity consumers particularly significant.

How we verify these legislative requirements

We verify information regarding the UK Climate Change Levy and its exemptions by directly consulting the primary legislative texts. Our analysis for this article relies on the Finance Act 2000 Schedule 6, as enacted and published on legislation.gov.uk. We accessed these statutory provisions on August 23, 2026, to ensure accuracy and direct citation of the legal framework. We do not provide legal advice, but rather present the statutory requirements as published.

Navigating CCL exemptions for your solar project

Understanding the specific conditions for CCL exemption is crucial if you are involved in generating or supplying renewable electricity in the UK. The requirements for renewable source declarations and generator agreements mean that careful contract drafting and record-keeping are essential. For businesses considering commercial solar installations, these rules can impact the financial viability and tax implications of their projects.

You can explore related topics such as UK Climate Change Levy for self-supply and non-registrable producers to understand broader CCL implications. For commercial solar PV projects, understanding EPC compliance is also important. If you are exporting excess electricity, the Smart Export Guarantee (SEG) provides further context on remuneration for renewable generation. These guides can help you navigate the regulatory landscape for renewable energy in the UK.