ISO 9001 is the universal Quality Management System (QMS) standard used by 1M+ organisations across every industry. IATF 16949 builds directly on ISO 9001 with 250+ additional automotive-specific requirements written by the International Automotive Task Force (IATF).
Any organisation worldwide wanting a baseline QMS — manufacturers, services, public sector, NGOs.
Direct (Tier 1, 2, 3) automotive suppliers shipping parts or services into OEM supply chains (Ford, GM, Stellantis, BMW, Toyota, Honda, etc.).
All ten dimensions head-to-head:
| Aspect | ISO 9001 | IATF 16949 |
|---|---|---|
| Scope | Universal — all industries | Automotive supply chain only |
| Clause count | 10 main clauses (Annex SL) | ISO 9001 + ~250 automotive add-ons |
| Customer-specific reqs (CSRs) | Not addressed | Mandatory — OEM-specific requirements integrated |
| Risk approach | Clause 6.1 risk-based thinking | Risk-based thinking + FMEA, PPAP, control plans mandatory |
| Audit days (avg, 100-staff) | 4–6 days | 8–12 days (more rigorous) |
| Certifying body | Any ANAB/UKAS/RvA accredited CB | IATF-recognised CB only (sanctioned auditor) |
| Surveillance | Annual | Annual + customer audit + special audits |
| Cost (cert + audit) | £3k–£15k typical SME | £15k–£40k typical SME (auditor + tooling) |
| Validity | 3 years | 3 years (re-cert) |
| Documentation | Light, process-based | Heavy — APQP, PPAP, MSA, SPC, FMEA, control plans |
Choose ISO 9001 if your customers don’t demand IATF; you want a flexible, lighter QMS; you operate outside automotive; or you’re a service business.
Choose IATF 16949 if you’re a Tier 1, 2 or 3 automotive supplier; your OEM contracts explicitly demand IATF; or you want to compete for global automotive business.
You cannot certify to IATF without also implementing ISO 9001 — IATF is built on ISO 9001’s foundation. If you already hold ISO 9001 certification, IATF certification typically takes 12–18 months of additional implementation.
You don’t need a separate ISO 9001 certificate — IATF 16949 includes all ISO 9001 requirements plus automotive add-ons. One IATF certificate covers both.
Yes. If you exit the automotive sector you can choose to maintain only ISO 9001 certification, which is significantly less costly to maintain.
No. IATF 16949 is published by the International Automotive Task Force, not ISO. It is a sector-specific standard that aligns with ISO 9001.
For an SME already certified to ISO 9001, typically 12–18 months. Greenfield implementation can take 18–24 months.
IATF 16949 is significantly harder. Failures during stage 2 audit are common because of strict process-effectiveness scoring.
Both standards have free interactive gap-analysis tools — no sign-up, no install.