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Start your NAS accreditation journey to gain independent certification and unlock buyer confidence.
NAS (National Assurance Standard) is an independent, evidence-based UK certification scheme for contractors, trades and SMEs in every town and city across the UK. Contractors prove their compliance, manage key documents and share live supplier data with buyers. Procurement teams get a clearer view of certification status, insurance, workforce records, RAMS, CIS information and contractor risk — without chasing endless emails.
Independent assessment. Evidence-based certification. ISO/IEC 17021 aligned.
Apply for NAS Certification → | Request Buyer Access →
Get NAS certified, build credibility, manage compliance documents, create RAMS, track workforce records and win more work. Show buyers live compliance evidence, reduce repeated document requests, and grow your business with procurement-ready certification.
Stop chasing supplier paperwork. NAS gives procurement, HSEQ and supply chain teams a live view of contractor compliance, certification status, insurance, workforce training, policies, RAMS, CIS records and financial health indicators.
Request free buyer access →
Entry-level H&S certification for sole traders and small businesses. Covers Health & Safety Policy, RAMS assessment, digital NAS certificate and public register listing.
Full compliance certification for SMEs & contractors covering core legislation and operational compliance. Includes Data Protection, GDPR, Equality & Diversity, and insurance verification.
Enhanced compliance for growing SMEs with governance, environmental policy, risk management evidence and operational maturity. Priority processing included.
Procurement-ready certification covering 22 compliance areas including Building Safety Act, corporate governance, PQQ response generator and shareable buyer profile.
NAS certification is for UK contractors, subcontractors, tradespeople, and SMEs who want to demonstrate live compliance, win more contracts, and get onto approved supplier lists — supporting business growth in every region of the UK.
Recognised by housing associations, main contractors, local councils, NHS trusts, MOD suppliers, and procurement teams across the UK.
Full guide to how NAS certification works →
