Approved Supplier List (ASL)
A pre-vetted register of suppliers a buyer has cleared to provide specific goods or services without a full open tender.
Definition
An Approved Supplier List is a register of suppliers that a contracting authority or buying organisation has assessed and cleared to supply defined categories of goods or services. Inclusion on the list is usually time-limited and conditional on the supplier maintaining specific accreditations, insurances, and financial standing. ASLs are common in local government facilities management, housing maintenance, and adult social care where buyers need rapid access to a pre-vetted pool without running a full competition each time.
How it works in practice
An ASL sits between a full framework and an ad-hoc supplier search. Suppliers apply through a standard selection questionnaire that mirrors the Selection Questionnaire used elsewhere, covering financial standing, insurances, relevant experience, exclusion grounds, and any sector-specific certifications. Once approved, suppliers can be invited to quote for individual jobs by direct award (low value) or Mini-Competition for higher value or more complex requirements. The advantage for buyers is speed: they can issue a request for quote with a short turnaround knowing all responders meet the baseline standards. The advantage for suppliers is access to a steady flow of opportunities without competing against the entire market each time. Risks for suppliers include framework-style cliff edges when the ASL is retendered, and the need to keep insurance certificates and certifications current to avoid being suspended from the list. Most ASLs run for two to four years and require periodic refreshes where new suppliers can apply and existing ones must re-confirm eligibility. Some authorities publish their ASL on Contracts Finder as a register; others keep it private to their procurement team.
Common questions
Is an Approved Supplier List the same as a framework agreement?
No. A framework is a formal agreement governed by procurement regulations with defined call-off procedures and a fixed term. An ASL is more lightweight: it is a register of vetted suppliers but does not by itself constitute a contractual framework, and authorities may still need to run a separate compliant procurement for any individual contract above the relevant threshold.
How do I get on an Approved Supplier List?
Most authorities publish an open application window at the start of each ASL cycle. Some run rolling applications. Applications are made through the authority tender portal and require a completed selection questionnaire plus evidence of financial standing, insurances, relevant experience, and any sector-specific accreditations such as Constructionline or Cyber Essentials.
How long does ASL approval last?
Approval is usually valid for the duration of the ASL cycle, often two to four years, but is conditional on you maintaining the qualifying criteria. If your insurance lapses, accreditations expire, or your financial position deteriorates beyond the qualifying threshold you can be suspended or removed. Most authorities do an annual refresh check between full retenders.