Combining ISO 9001 with other certifications
Many organisations need more than one certification. A construction company wants ISO 9001 and VCA. An IT company wants ISO 9001 and ISO 27001 . Thanks to the High Level Structure of modern ISO standards, you can combine these in one integrated system.
Why combine ISO 9001 with other standards?
Benefits
- Less duplicate work: Many parts overlap (policy, objectives, audits, management review)
- Lower costs: Combined audits cost less than separate audits
- One system: Employees only need to learn one system
- Better integration: Quality, environment and safety belong together
Drawbacks
- More complex implementation: You have to set up more at once
- More knowledge needed: You have to understand several standards
- Greater impact when things go wrong: If the system fails, it affects everything
Most organisations start with one standard (often ISO 9001) and expand later. This is easier than implementing everything at once.
The High Level Structure: why combining ISO 9001 is easy
Since 2015, all major ISO management system standards have the same structure: the High Level Structure (HLS) . This makes combining much simpler.
| Clause | Topic | In all standards |
|---|---|---|
| 1 | Scope | ✓ |
| 2 | Normative references | ✓ |
| 3 | Terms and definitions | ✓ |
| 4 | Context of the organisation | ✓ |
| 5 | Leadership | ✓ |
| 6 | Planning | ✓ |
| 7 | Support | ✓ |
| 8 | Operation | Standard-specific |
| 9 | Performance evaluation | ✓ |
| 10 | Improvement | ✓ |
Clause 8 is the only one that differs per standard. It sets out the specific requirements for quality, environment, information security, and so on.
Popular combinations with ISO 9001
ISO 9001 + ISO 14001 (Quality + Environment)
This is the most common combination. Many organisations that work with suppliers and government bodies need both.
Overlap
What overlaps:
- Context and interested parties
- Leadership and policy
- Risk analysis
- Competence and awareness
- Document control
- Internal audit
- Management review
- Corrective actions
Sectors where this is common:
- Construction and infrastructure
- Manufacturing
- Logistics
- Facility services
Read more about this combination on the page combining ISO 14001 and ISO 9001.
ISO 9001 + ISO 27001 (Quality + Information security)
Popular with IT companies, software developers and organisations that handle sensitive data.
Overlap
What overlaps:
- Context and interested parties
- Leadership and policy
- Risk analysis (although the approach is different)
- Competence and awareness
- Document control
- Internal audit
- Management review
- Corrective actions
Sectors where this is common:
- IT and software
- Financial services
- Healthcare
- Government and semi-government bodies
ISO 9001 + VCA (Quality + Safety)
Standard in sectors where physical safety is critical. Note: VCA is not an ISO standard, but it has its own structure.
Overlap
What overlaps:
- Policy and objectives
- Competence and training
- Document control
- Internal controls and audits
- Management commitment
- Corrective actions
Sectors where this is common:
- Construction
- Petrochemicals
- Industry
- Installation technology
- Cleaning
ISO 9001 + ISO 45001 (Quality + Occupational health and safety)
ISO 45001 is the ISO standard for occupational health and safety. It follows the HLS, so it combines better than VCA.
Overlap
What overlaps:
- The full HLS structure
- Context and interested parties
- Leadership and policy
- Risk analysis
- Competence and awareness
- Document control
- Audit and management review
Combining ISO 9001 + 14001 + 45001 (KAM or QHSE)
The best-known combination of three standards is ISO 9001 (quality), ISO 14001 (environment) and ISO 45001 (occupational safety). Together they form a KAM system (Kwaliteit, Arbo, Milieu, the Dutch for quality, health and safety, and environment), called QHSE in English. All three follow the High Level Structure , so most clauses overlap.
In an integrated management system (IMS), you write those shared clauses once. Only clause 8 is filled in differently for each standard. The table below shows, per clause, what is shared and what stays specific to a standard.
| Clause | Topic | Shared or standard-specific |
|---|---|---|
| 4 | Context and interested parties | Shared, with environmental and safety factors added |
| 5 | Leadership and policy | Shared: one integrated KAM policy |
| 6 | Planning, risks and objectives | Largely shared, separate risk assessment per theme |
| 7 | Support and competence | Shared: one register for people and resources |
| 8 | Operation | Specific to each standard |
| 9 | Evaluation and internal audit | Shared: one audit round, one management review |
| 10 | Improvement | Shared: one process for deviations and corrective actions |
For clause 8, each standard keeps its own course. Quality covers customer requirements and delivery, environment covers environmental aspects, and safety covers hazards and risks on the work floor.
What does combining three standards save?
The gain lies in the shared clauses and in one combined audit. Below is an indication. Treat it as a guideline, not a quote.
| Approach | Audit days (indication) |
|---|---|
| Three standards separately | 5-6 days |
| Three standards combined in one IMS | 3.5-4.5 days |
Apart from audit days, it also saves internal work: one policy document, one audit schedule and one management review instead of three. For exact costs, see the page costs and timeline.
The more standards, the more complex it gets. Make sure you have the basics under control before you expand. Two standards that are alive are better than four standards that exist only on paper.
Other common combinations of three standards:
- ISO 9001 + ISO 14001 + VCA (in construction)
- ISO 9001 + ISO 27001 + ISO 14001 (IT with a sustainability focus)
What is a combined audit for ISO 9001?
If you hold several certifications, you can choose combined audits.
Benefits
- Cost savings: One auditor, fewer days, lower travel costs
- Efficiency: One audit instead of two or three separate ones
- Less disruption: Employees are not “disturbed” several times a year
How does it work?
The certification body sends an auditor (or a team) who is certified for all standards. The audit takes longer than a single-standard audit, but less time than separate audits added together.
Example duration:
| Situation | Audit days |
|---|---|
| ISO 9001 only | 2 days |
| ISO 14001 only | 1.5 days |
| ISO 9001 and ISO 14001 separately | 3.5 days |
| ISO 9001 and ISO 14001 combined | 2.5-3 days |
Conditions
- All certifications with the same body (or bodies that work together)
- Auditors must be qualified for all standards
- Timing must match (certification cycles often do not run in sync)
Practical tips for integrating ISO 9001 with other standards
1. One policy, several aspects
Instead of separate policies for quality, environment and safety, create one integrated policy:
POLICY [COMPANY NAME]
We deliver [products/services] that meet the expectations of our
customers, with respect for people and the environment.
Our core values:
- Quality: We deliver what we promise
- Safety: Nobody gets hurt by our work
- Environment: We minimise our impact on the environment
- Improvement: We learn and get better
This policy is supported by measurable objectives.
[Name of director]
[Date]2. One context analysis
Extend your context analysis with all aspects:
| Factor | Quality | Environment | Safety |
|---|---|---|---|
| Legislation | Product liability | Environmental legislation | Arbowet (Dutch Working Conditions Act) |
| Customers | Product requirements | Sustainability requirements | Safety requirements |
| Employees | Competence | Environmental awareness | Working safely |
3. Integrated risk assessment
Use one format for risks, but categorise them:
| Risk | Type | Likelihood | Impact | Measure |
|---|---|---|---|---|
| Supplier drops out | Quality | M | H | Second supplier |
| Leak of hazardous substance | Environment | L | H | Spill trays, emergency plan |
| Fall from height | Safety | M | H | Harnesses, training |
4. One internal audit
Plan audits so that you check all standards at the same time. Use a checklist that covers all requirements.
5. One management review
Discuss quality, environment and safety in one meeting. Extend the agenda with standard-specific topics.
Step by step: extending ISO 9001 with an additional standard
If you already have ISO 9001 and want to expand:
- Decide which standard: Look at customer requirements and business needs
- Gap analysis: What do you already have? What is missing?
- Plan the extension: Which additional documentation? Which processes need changing?
- Implement: Add the new parts to your existing system
- Internal audit: Audit the extended system
- Certification: Extension audit or combined audit
Tip: Inform your current certification body early. They can advise on the best approach and timing.
What do multiple certifications cost alongside ISO 9001?
| Certification | First year (indication) | Annual maintenance |
|---|---|---|
| ISO 9001 only | €5,000 - €12,000 | €2,000 - €4,000 |
| ISO 9001 + ISO 14001 | €8,000 - €18,000 | €3,000 - €6,000 |
| ISO 9001 + ISO 27001 | €10,000 - €25,000 | €4,000 - €8,000 |
| ISO 9001 + VCA | €6,000 - €15,000 | €2,500 - €5,000 |
Indications for SMEs (10-50 employees)
More information
- ISO 9001 step-by-step plan - How to start
- Costs and timeline - Detailed cost overview
- ISO 14001 - Environmental management
- ISO 27001 - Information security
- VCA - Safety