Applying to the BSL

To register your fuel on the Biomass Suppliers List (BSL), biomass suppliers must submit an application to the BSL Administrator. The application process asks for evidence to show that the fuel meets the Renewable Heat Incentive (RHI) sustainability and fuel quality requirements. For more information on the sustainability requirements, please see the Sustainability Criteria page under the About tab.  For more information on fuel quality, please visit the Fuel Quality page under the About tab.

Before starting your application, please read the tabs on the left hand side for more information on how to complete your application correctly. It is also important to read the guidance documents which can be found under the Documents and Guidance tab. This will help to speed up your application process by ensuring you provide us with the correct information.


We welcome any feedback you may have regarding the application process. Please take a minute to complete our survey here.

Before you apply

Before you apply to the Biomass Suppliers List (BSL), you should make sure you read the Applications Guidance document, as this will provide you with all the information you need to submit your application. This will make the process of completing your application simpler and should help to speed up your application processing time. This can be found under the Documents and Guidance tab.

The most important step when submitting an application is making sure you apply as the correct supplier type, as this will determine what information and evidence you are required to provide. Click on the "What supplier type are you?" tab on the left hand side to see the definitions of each supplier type and check that you are applying correctly. 

Please note that fees are applicable to the BSL. Details on fee amounts are in the BSL fee guidance on the Documents and Guidance page.


What supplier type are you?

Use the diagram below to determine which supplier type you should be applying as:


A Self-Supplier is a supplier who uses their own wood to fuel their own biomass boiler. Self-Suppliers are not able to sell their fuel to anyone else. They use their Biomass Suppliers List (BSL) authorisation to claim their Renewable Heat Incentive (RHI) payments.

RHI participants are classified as Self-Suppliers if:

"their installation is less than 1MWth capacity, and if they source woody biomass (which they have the legal right to source, through ownership, rental or other relevant arrangement) from a Permitted Location. Self-Suppliers will also be able to source waste woodfuel directly from the place where it first becomes waste, for use in their installation."

A Permitted Location is one where the applicant has a right to harvest the solid biomass, whether by virtue of ownership, tenancy or otherwise, and which is no more than 50 miles from the accredited domestic plant in which that biomass is used.

If you are buying in any additional wood to top up your own supply, you must register as a Producer-Trader. If you are unsure whether you should apply as a Self-Supplier or a Producer-Trader, please use the table below, the diagram under the "What supplier type are you" tab on the left hand side, or the Self-Supplier Factsheet under the Documents and Guidance tab.

Self-Supplier Producer-Trader
Raw Materials Criteria
Sources all wood from a Permitted Location (none purchased) Purchases in a raw material (i.e. timber) and processes it
Sources wood within 50 miles of the boiler in which it is burnt Can use wood from own woodland but is purchasing some in too
Fuel Criteria
Does not sell any of the woodfuel to third parties Has the option of selling woodfuel on to a third party
Is able to purchase fuel from a BSL authorised supplier Is able to purchase fuel from a BSL authorised supplier

Producers, Traders and Producer-Traders

There are three types of commercial supplier on the Biomass Suppliers List (BSL): Producer, Trader and Producer-Trader. All three are allowed to sell their fuel to a third party, however they do not have to. Further information on each supplier type can be found below. Please use the diagram under the "What supplier type are you?" tab on the left hand side to determine which supplier type best fits your situation.


A Producer is a person that produces biomass fuel from a raw material and sells this fuel onto a Trader. A Producer is not authorised to sell biomass directly to Renewable Heat Incentive (RHI) participants.

A Producer can operate from one or more sites. These sites may be owned or operated by different legal entities so long as they are controlled by the Producer (e.g. subsidiary companies, majority interest etc).


A Trader is a person who buys biomass fuel and sells it to RHI participants and/or other Traders. A Trader may sell and deliver bulk fuel to Traders and/or RHI participants (either with their own equipment or via a service provider), or bag and sell the biomass fuel direct to end users. A Trader is not authorised to process raw materials to produce biomass fuel.

The individual selling points may be owned or operated by different legal entities (e.g. subsidiary companies, majority interest etc.) so long as the characteristics of the fuel are controlled by the Trader. The individual selling points do not have to have their own storage facilities or delivery trucks.


A Producer-Trader combines the role of Producer and Trader, i.e. a person who processes raw material into biomass fuel and either sells it to RHI participants or biomass Traders. Producer-Traders also covers suppliers who buy in a portion of their raw material and process it for use within their own biomass boilers.

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