What does ISO 9001 certification cost?
The costs of ISO 9001 certification vary widely. You need an accredited certification body , and the standard itself is available from NEN . A sole trader pays something different from a company with 100 employees. This page gives you an honest overview of all cost items.
The amounts on this page are indications based on market research (2024-2025). Always request concrete quotes for your specific situation.
ISO 9001 costs by company size
| Cost item | Sole trader / small (1-10) | SME (10-50) | Larger (50-100) | Large (100+) |
|---|---|---|---|---|
| Guidance / advice | €1,500 - €3,000 | €3,000 - €6,000 | €6,000 - €10,000 | €10,000 - €25,000 |
| Purchasing the standard | €200 | €200 | €200 | €200 |
| Certification audit | €1,200 - €2,000 | €2,500 - €4,000 | €4,000 - €6,000 | €6,000 - €15,000 |
| Internal audit | €400 - €800 | €500 - €1,500 | €1,000 - €2,500 | €2,500 - €5,000 |
| Staff training | - | €500 - €1,000 | €1,000 - €2,000 | €2,000 - €5,000 |
| Total first year | €3,000 - €6,000 | €6,000 - €12,000 | €12,000 - €20,000 | €20,000+ |
| Annual follow-up costs | €800 - €1,500 | €1,500 - €3,000 | €3,000 - €5,000 | €5,000 - €10,000+ |
What do ISO 9001 costs consist of?
Purchasing the standard
You buy the official NEN-EN-ISO 9001:2015 standard from NEN . The price is €198.75 (digital, one user).
You need the standard to know exactly what is required. Many advisers already have it, but if you do it yourself, you must buy it.
Advisory costs for ISO 9001
This is often the largest cost item. An adviser helps you with:
- Carrying out a gap analysis
- Documenting processes
- Implementing the system
- Preparing for the audit
Adviser rates:
- Hourly rate: €100 - €160 per hour
- Fixed package for a small company: €2,000 - €4,000
- Fixed package for an SME: €5,000 - €10,000
You can also work without an adviser, but then you must understand the standard yourself and work everything out. For a first certification, guidance is often worth the investment.
What does the ISO 9001 certification audit cost?
The certification body (Kiwa , TÜV , DEKRA , etc.) charges for:
- Stage 1 audit (document check)
- Stage 2 audit (implementation audit on site)
- Issuing the certificate
- Administration costs
Audit costs per day:
- Daily rate for the auditor: €1,200 - €1,500
- Half day: €600 - €750
The number of audit days depends on:
- Number of employees (FTE)
- Complexity of your activities
- Number of sites
Indication of audit days:
| Company size | Audit days (stage 1 + 2) |
|---|---|
| 1-10 FTE | 1-1.5 days |
| 10-25 FTE | 2 days |
| 25-50 FTE | 2.5-3 days |
| 50-100 FTE | 3-4 days |
| 100+ FTE | 4+ days |
Annual costs after ISO 9001 certification
After certification, the auditor returns every year for a surveillance audit. This is shorter than the initial audit, usually about half the time.
After three years, a recertification audit follows, comparable to the initial audit.
Indication of annual costs:
| Company size | Surveillance audit |
|---|---|
| Small (1-10) | €800 - €1,200 |
| SME (10-50) | €1,200 - €2,000 |
| Larger (50-100) | €2,000 - €3,500 |
| Large (100+) | €3,500+ |
Internal audit costs
ISO 9001 requires an annual internal audit. You can do this yourself (with someone who does not audit their own work) or outsource it.
Costs of an external internal audit:
- Small company: €400 - €800
- SME: €800 - €1,500
- Larger: €1,500 - €3,000
6. Training and education
Optional, but often valuable:
- Internal auditor training: €500 - €800 per person
- General ISO 9001 training: €300 - €500 per person
- E-learning modules: €100 - €300
Hidden costs of ISO 9001 certification
In addition to the direct costs, there are indirect costs:
| Cost item | Explanation |
|---|---|
| Staff time | Describing processes, interviews with the auditor |
| Project manager’s time | Hours spent on the process |
| Software / tooling | Document management system, quality software |
| Infrastructure adjustments | Sometimes needed to meet requirements |
Don’t underestimate the time investment. A certification process takes on average 40-100 hours internally for a small company, and 100-300 hours for an SME.
How can you save on ISO 9001 costs?
Implement it yourself
The more you do yourself, the less you spend on advice. This only works if you:
- Have the time to study the standard in depth
- Have someone internally who can lead this
- Are willing to learn from mistakes
Choose wisely between certification bodies
- Compare quotes from several certification bodies
- Ask about package prices (audit + surveillance)
- Choose a body that suits your sector (sometimes more efficient)
Combine ISO 9001 with other certifications
If you also want other certifications (ISO 14001, ISO 27001), you can often carry out combined audits. Many certification bodies, such as Kiwa , offer this. That saves audit days.
How long does ISO 9001 certification take?
| Phase | Small (1-10) | SME (10-50) | Larger (50+) |
|---|---|---|---|
| Gap analysis | 1 week | 2 weeks | 3-4 weeks |
| Documentation | 2-4 weeks | 4-6 weeks | 8-12 weeks |
| Implementation | 4-6 weeks | 8-12 weeks | 12-20 weeks |
| Internal audit | 1 day | 2-3 days | 1-2 weeks |
| Certification audit | 1-1.5 days | 2-3 days | 3-5 days |
| Total lead time | 2-4 months | 4-6 months | 6-12 months |
Is ISO 9001 worth the investment?
That depends on your situation:
When ISO 9001 pays for itself
- Clients or contracting authorities require it
- You are missing out on contracts without a certificate
- You want to work seriously on process improvement
When ISO 9001 may not be needed
- Nobody asks for it
- You only want it for show
- You don’t have the time to maintain it
Keep in mind: the costs of obtaining the certificate are one-off. The costs of maintaining it are ongoing. Budget 10-20% of the initial investment per year for maintenance.
Next step towards ISO 9001
Want to know exactly what ISO 9001 requires of you? Read more about the requirements of the standard or see how the audit works.