What Is the Difference Between ISO 27001 and TISAX®?
ISO 27001 or TISAX® – which standard is right for your organisation? This article explains the key differences and overlaps – and when you need one or both. It also includes practical tips on how to integrate both standards efficiently into your ISMS.
Key Takeaways
ISO 27001 is the international gold standard for ISMS and applies across all industries.
TISAX® is tailored to the automotive industry and widely used across Europe.
Both standards complement each other – a dual strategy maximises market access and trust.
Why This Distinction Is Business-Critical
The cybersecurity landscape in 2025 is shaped by major regulatory change. NIS2 significantly expands the number of companies subject to mandatory cybersecurity requirements, while BSI IT-Grundschutz is evolving into IT-Grundschutz++ with the ambition to make cybersecurity measurable and automatable.
Against this backdrop, companies face a strategic decision: ISO 27001, TISAX® – or both?
This choice is not a mere technical detail. It directly affects:
Market access (e.g. automotive OEMs, international clients)
Competitiveness in tenders and RFPs
Compliance evidence towards regulators, partners and investors
While ISO 27001 certifications continue to grow globally, TISAX® has become a de-facto standard in the European automotive ecosystem. The real challenge is not picking a single standard, but combining both intelligently.
Understanding the Basics: ISO 27001 and TISAX® in Detail
ISO 27001 – The International Gold Standard
leading global standard for Information Security Management Systems (ISMS) since 2005
maintained by the International Organization for Standardization (ISO)
applicable across all industries, latest major revision in 2022
Core elements:
Risk-based approach to protecting confidentiality, integrity and availability
the PDCA cycle (Plan–Do–Check–Act) as engine for continuous improvement
Annex A with 93 security controls as a structured control catalogue
Flexible scope definition, from a single product or service to the entire organisation
Certification by accredited bodies, typically valid for 3 years with annual surveillance audits
strong marketing and trust effect, as the certificate can be used publicly in communication and sales.
TISAX® – Automotive Security Excellence
TISAX® (Trusted Information Security Assessment Exchange)
introduced in 2017 by the German Association of the Automotive Industry (VDA)
managed internationally by the ENX Association
Specifics:
originally derived from ISO 27001, now a distinct, industry-specific standard
based on the VDA ISA questionnaire, covering:
general information security
data protection
prototype protection
assessment focuses not only on implementation, but also on maturity levels (1–3)
always covers the entire organisation – no scoped-down certification possible
assessments may only be performed by ENX-accredited audit providers
results are valid for up to 3 years, but:
no public certificate for marketing purposes
assessment results are shared exclusively via the ENX portal with authorised TISAX® participants (e.g. OEMs and suppliers).
Leveraging Common Ground and Synergies
Shared DNA: ISMS as the Core
Despite their differences, both standards share the same foundation: a functioning ISMS that systematically reduces information security risks.
Commonalities:
Risk-based approach: controls are prioritised based on actual threats and business risks.
Continuous improvement: both rely on recurring reviews and updates.
Management responsibility: information security is a leadership task, not just an IT problem.
Technical Synergies
In practice, there is significant overlap in areas such as:
Asset management (applications, systems, information assets)
Access control and identity/permission concepts
Vulnerability and patch management
Business continuity & incident management
Synergies in implementation:
a shared policy framework (e.g. password policy, logging, incident handling, BCP)
common governance structures and roles (ISMS steering committee, CISO, IR team)
one integrated GRC/ISMS platform covering both ISO 27001 and TISAX® requirements
unified monitoring & reporting via shared dashboards for management and auditors
This makes it possible to run both standards on one integrated architecture rather than building parallel systems.
Which Standard Do You Need? – Decision Guide
Automotive Industry
For organisations active in the automotive value chain, TISAX® is essentially mandatory:
OEMs:
TISAX® to meet supply chain and VDA requirements
ISO 27001 for additional international credibility and global partners
Tier-1/2/3 suppliers:
TISAX® as prerequisite for RFQs, long-term contracts and strategic partnerships
Service providers (IT, engineering, cloud, etc.):
TISAX® depending on OEM requirements
increasingly required when handling development data, prototypes or confidential OEM information.
Other Industries
CRITIS sectors: ISO 27001 is often the standard of reference to demonstrate “state of the art” security and prepare for NIS2.
B2B service providers & SaaS vendors: ISO 27001 as a strong trust signal in competitive sales and due diligence processes.
International organisations: ISO 27001 as a globally recognised baseline standard that aligns security expectations across countries and partners.
Current Trends and Future Developments
Regulatory Developments
NIS2 implementation massively increases the number of regulated entities and introduces new sectors to cybersecurity obligations.
IT-Grundschutz++ aims to make cybersecurity measurable and automatable, which will impact how ISMS are designed and operated.
In the automotive domain, UN-R155 and ISO/SAE 21434 are gaining importance as vehicle-specific cybersecurity standards complementing TISAX®.
The upcoming EU Cyber Resilience Act will add another layer of compliance for digital products.
The direction is clear: integrated compliance across multiple standards will become the norm.
Technology Trends
Automated compliance through AI-driven monitoring and reporting
Cloud-native ISMS integrated directly into DevSecOps pipelines
Machine-readable rule sets (e.g. inspired by IT-Grundschutz++) that also support automated checks for ISO 27001 and TISAX® controls
modern GRC platforms that capture KPIs and maturity indicators once – and reuse them for ISO 27001 reporting and TISAX® assessments
As a result, it becomes increasingly feasible to operate both standards in parallel with limited additional overhead.
Step by Step to a Certifiable ISMS
With the fuentis Suite 4 ISMS Tool, you can implement both standards efficiently – ISO 27001 and TISAX® as well as IT-Grundschutz and NIS2.
Multi-Compliance ISMS A complete ISMS solution that guides you to ISO 27001 certification while also supporting IT-Grundschutz, TISAX® and NIS2.
Automated processes Guided workflows that lead you step by step through the certification process – even without deep prior knowledge.
Review questionnaires Simple, customisable questionnaires that help you determine protection needs quickly and transparently.
Personal support Experienced consultants support you from the first gap analysis through to audit preparation.
Now continue reading about NIS2 and how it interacts with ISO 27001, IT-Grundschutz and TISAX®.
Srdan Manasijevic
CEO
Expert in information security, data protection and risk management with extensive experience advising enterprises and public-sector organizations. Specialized in ISO 27001, BSI and advanced risk methodologies.