TISAX vs ISO 27001: What’s the Difference and Which Do You Need?
TISAX and ISO 27001 are both information security standards, but they cover different ground. ISO 27001 is a globally recognized, industry-agnostic certification for an information security management system (ISMS). TISAX is narrower. It’s an automotive-industry assessment and result-exchange scheme, and the two names get confused constantly.
The ENX Association runs TISAX on behalf of the German Association of the Automotive Industry (VDA). Its assessment catalogue, the VDA ISA, draws on key ISO/IEC 27001 concepts. So the two standards overlap in substance, even though they serve different customers and different industries.
If a customer just asked you about the standard you don’t already have, this guide breaks the two down side by side: what each one covers, who runs it, and which one your business actually needs.
ISO 27001 vs TISAX at a Glance
Here’s how the two standards stack up on the basics.
| Attribute | ISO 27001 | TISAX |
|---|---|---|
| Governing body | International standard maintained by ISO/IEC JTC 1/SC 27 | Run by the ENX Association, on behalf of the VDA |
| Industry scope | Any industry, any company size | Automotive supply chain only |
| Legal status | Voluntary; often a contractual requirement | Voluntary; often a contractual requirement |
| Assessment mechanism | A certificate, issued by an accredited certification body | A label, not a certificate |
| Validity period | Typically valid for three years | Valid for three years |
| Who performs the audit | An accredited third-party certification body | An ENX-recognized audit provider |
Neither standard is a government mandate. Neither one shows up in a statute you’re legally bound to follow.
But that doesn’t mean either is optional in practice. If your OEM customer’s contract requires a TISAX label, you need one to keep that business. If an enterprise customer’s security questionnaire requires ISO 27001, the same logic applies there too.
Why TISAX Exists When ISO 27001 Already Did
So why did the automotive industry build its own scheme on top of it?
Two reasons stand out:
- OEMs needed more depth than a generic ISMS certificate provides. Automotive supply chains handle sensitive prototype data, physical prototype vehicles and parts, and specialized data-processing arrangements between suppliers and manufacturers. The VDA ISA catalogue adds dedicated modules for exactly this: prototype protection and data-processing-specific controls that a standard ISO 27001 audit doesn’t examine by default.
- OEMs needed one result they could reuse across many supplier relationships. Without a shared scheme, every supplier would hand each OEM a generic ISO 27001 certificate. Every OEM’s security team would then have to interpret that certificate on its own, with no common scoring format and no shared platform to exchange results.
TISAX solves both problems at once. A supplier completes one assessment, and multiple OEMs can request and review that same result through the ENX exchange platform, instead of each customer running its own bespoke review.
That’s the real split between the two standards. ISO 27001 certifies that your ISMS meets a broad international bar, applicable to any industry. TISAX confirms you meet automotive-specific control depth, packaged in a format built for suppliers who answer to more than one OEM at once.
Does Having One Satisfy the Other?
Short answer: no.
There’s no formal crosswalk between a TISAX label and an ISO 27001 certificate. The two schemes are run by different organizations. They’re audited by different providers, in different formats. One doesn’t automatically convert into the other.
That matters most when a supplier already holds one standard, and a new customer starts asking for the other. Two situations come up constantly:
- You have ISO 27001, and an OEM asks for a TISAX label. Your certificate is not a substitute. The OEM’s contract requires TISAX specifically. That means an actual VDA ISA assessment, run through ENX’s exchange platform.
- You have a TISAX label, and a non-automotive customer asks for ISO 27001. Your label is not a substitute either. That customer’s security questionnaire is built around ISO 27001’s certificate format, not TISAX’s.
Here’s the good news: the underlying work overlaps substantially. The VDA ISA catalogue builds on core ISO/IEC 27001 concepts. A lot of the control work you did for one standard carries over to the other. You’re rarely starting from zero.
Which One Do You Actually Need?
It depends on who’s asking, and why. Use this as a quick gut check.
Many suppliers end up needing both. A Tier 1 automotive supplier often gets there over time. It might hold a TISAX label for its OEM relationships. At the same time, it works toward ISO 27001 certification requirements for its broader commercial accounts.
Not sure which one your specific contract requires? Compare the basics side by side in what ISO 27001 is and how ISMS certification works and what TISAX and the VDA ISA standard are. Both guides link back here.
If ISO 27001 is the one on your plate, ISO 27001 certification requirements walks through what the audit actually checks. Our ISO 27001 certification cost guide breaks down what drives the price up or down. On the TISAX side, the TISAX certification process, step by step covers what to expect, from assessment to label.
Where the Technical Work Overlaps
This part should reassure you. Work done for one standard is not wasted if you need the other later. Both frameworks examine the same core control areas.
- Access management. Who can reach sensitive systems and data, and how that access gets granted, reviewed, and revoked.
- Encryption. How data is protected at rest and in transit.
- Patch and change management. How you track, test, and roll out security updates and system changes.
- Incident response. How you detect, contain, and report a security incident.
- Business continuity. How you keep operating, or recover quickly, after a disruption.
Build strong practices in these five areas once. You’re most of the way to either standard already. That’s the practical takeaway for a supplier weighing TISAX, ISO 27001, or both.
See Where You Stand
Whichever standard your customer is asking for, the underlying technical controls look similar. Take the free 2-minute TISAX Readiness Check to see where your organization stands today, chapter by chapter.
free 2-minute TISAX Readiness Check
Related Guides
- What Is TISAX? The VDA ISA Standard Explained for Automotive Suppliers
- The Complete TISAX Compliance Guide for Automotive Suppliers
- What Is ISO 27001? The Plain-English Guide to ISMS Certification
- ISO 27001 Certification Requirements: What You Actually Need
- The TISAX Certification Process: Step by Step
Frequently Asked Questions
No. TISAX is an automotive-industry assessment and result-exchange scheme run by the ENX Association on behalf of the VDA. ISO 27001 is a global, industry-agnostic certification for an information security management system. They cover overlapping ground but stay separate schemes with separate audits.
No. There is no automatic equivalence between the two. An OEM that requires a TISAX label needs an actual VDA ISA assessment through the ENX exchange platform, even if you already hold ISO 27001 certification.
No. A TISAX label is not a certificate, and it isn’t recognized as an ISO 27001 substitute. A customer requiring ISO 27001 needs a certificate from an accredited certification body instead.
Many automotive suppliers eventually do. If you serve OEM customers, you likely need TISAX. If you also sell into other industries, or a security questionnaire specifically asks for ISO 27001, you’ll need that certificate too.
Start with whichever your contract or customer relationship actually requires. Most first-time automotive suppliers pursue TISAX first, since that’s what OEM and Tier 1 contracts typically request.
Neither one is a government mandate. Both are voluntary standards that become mandatory in practice once a customer contract requires them.
TISAX assessments are performed by an ENX-recognized audit provider. ISO 27001 certificates are issued by an accredited third-party certification body. Neither one is something a company can self-certify.
Get Help Deciding Which One You Need
Figuring out which standard applies to your business, and then closing the gaps to get there, is a heavy lift to take on alone. LeadingIT is not an ENX-accredited audit provider or an accredited ISO certification body, but we help clients get ready for both standards. That means closing control gaps, building out documentation, and prepping for the actual audit.
See our compliance-readiness IT services for the done-for-you path, or book a call to talk through your specific situation.
Want our cybersecurity insights first? Add LeadingIT as a preferred source on Google and see more of our guidance in your results.
