Walk into any Indian market and you will see products with a small "ISI" mark, and company brochures that say "ISO certified". Many business owners think these two mean the same thing, but they do not. One is about how your business runs, and the other is about whether a specific product meets Indian standards. This guide explains the difference between ISO and ISI in simple language, so you can decide which one your business really needs.
Quick answer: ISO is an international standards body whose certification applies to a company's management system. The ISI mark is issued by the Bureau of Indian Standards (BIS) and applies to a particular product made and sold in India.
What Is ISO?
ISO stands for the International Organization for Standardization, an independent body based in Geneva, founded in 1947. It publishes international standards for quality, safety, environment, information security, food safety and many other areas. India is represented in ISO by the Bureau of Indian Standards.
ISO itself does not give certificates. Independent certification bodies audit your organisation against a standard, such as ISO 9001 for quality management, and issue the certificate. This certificate shows that your management system follows a recognised international framework. It does not say that every product you make is of a certain grade.
What Is the ISI Mark?
The ISI mark is a certification mark for products, issued by the Bureau of Indian Standards (BIS). BIS is India's national standards body, working under the Ministry of Consumer Affairs, Food and Public Distribution. The mark started in the 1950s under the Indian Standards Institution, which was later renamed BIS, and it is governed today by the Bureau of Indian Standards Act, 2016.
When a product carries the ISI mark, it means the manufacturer holds a BIS licence and the product conforms to the relevant Indian Standard (IS number). It is a signal of safety, reliability and quality for customers in India.
Is ISI Mandatory?
It depends on the product. The government issues Quality Control Orders (QCOs) that make BIS certification compulsory for specific products, for example items such as certain cement grades, helmets, packaged drinking water and LPG-related equipment. Selling these products without the required BIS licence or mark is an offence. For many other products, ISI certification is voluntary but helps in sales and tenders. Always check the latest QCO list on the BIS website for your product.
A Note on the Other Meanings of ISI
Online, "ISI" can also mean the Indian Statistical Institute or the International Statistical Institute. These are academic and professional bodies, and they have nothing to do with product certification. In a business and compliance context, ISI almost always means the BIS product mark.
Difference Between ISO and ISI: Comparison Table
| Point | ISO | ISI Mark |
|---|
| Full form | International Organization for Standardization | Indian Standards Institution (now BIS marks) |
| Scope | International | India only |
| Applies to | Organisation and its management system | A specific product |
| Issued by | Accredited certification bodies | Bureau of Indian Standards (BIS) |
| Nature | Mostly voluntary | Mandatory for products under QCOs, otherwise voluntary |
| Testing | System audit of processes and records | Product testing in labs plus factory inspection |
| Mark on product | Not allowed to imply product approval | ISI mark with licence number printed on product |
| Examples | ISO 9001, ISO 14001, ISO 27001 | Helmets, cement, electrical goods, packaged water |
Key Differences Explained
1. System versus Product
ISO checks whether your company has reliable processes, such as record keeping, complaint handling and quality control. ISI checks whether the actual product, taken as a sample, passes the test requirements of an Indian Standard. A company can be ISO certified and still make a product that fails ISI tests, and the reverse is also possible.
2. Global versus Local
An ISO certificate is understood in many countries, which helps exporters and vendors dealing with foreign buyers. The ISI mark is specific to India and matters mostly for products sold in the Indian market, including imported goods that fall under Indian regulations.
3. Voluntary versus Compulsory
ISO certification is voluntary, although many tenders and customers ask for it. ISI or BIS certification can be legally compulsory when a QCO covers your product.
4. Inspection Method
For ISO, an auditor reviews documents and checks how your team works. For ISI, BIS officers inspect your factory, collect product samples and test them in recognised laboratories. The process is more technical and usually stricter.
How to Get ISO Certification
- Select the right ISO standard for your business.
- Prepare policies, procedures and records, and train your staff.
- Choose an accredited certification body.
- Complete the Stage 1 and Stage 2 audits.
- Close any findings and receive the certificate.
- Continue with yearly surveillance audits.
How to Get an ISI Mark
- Identify the Indian Standard: Find the IS number that applies to your product.
- Apply to BIS: File your application online on the BIS portal with the fee and documents.
- Factory inspection: A BIS officer visits your unit and checks your process, equipment and in-house testing.
- Sample testing: Samples are drawn and tested in a BIS-recognised laboratory.
- Grant of licence: If everything is in order, BIS grants the licence and a licence number.
- Use the mark and renew: Print the ISI mark with your licence number on the product, follow marking and testing rules, and renew before the licence expires.
Documents Usually Needed for ISI
- Business registration proof and address proof of the factory
- Manufacturing process flow chart
- List of machinery and testing equipment
- Details of the quality control plan and trained staff
- Authorisation letter for the applicant or representative
Which One Does Your Business Need?
- You make a product listed under a QCO: BIS certification is compulsory, so apply for the ISI mark or the relevant BIS scheme.
- You supply to government departments or large buyers: ISO 9001 is often asked for, and ISI may also be needed for the product.
- You export: ISO is generally more helpful, along with the standards of the destination country.
- You are a service business: ISO is the relevant option, because ISI applies only to products.
- You want both credibility and compliance: Many manufacturers hold ISO 9001 and an ISI licence at the same time.
Benefits of Each
ISO benefits: better internal processes, fewer errors, stronger credibility with buyers, and eligibility for many tenders. ISI benefits: legal permission to sell regulated products, customer confidence in safety, protection against fake or sub-standard competitors, and a clear edge in the Indian retail market. Both help you build trust, but in different ways.
Common Misunderstandings
- "ISO certified product": ISO certifies systems, not products. Using the ISO logo on a product to suggest quality approval can mislead customers.
- "ISI is just a logo": It is a licensed mark. Using it without a BIS licence is illegal and can lead to prosecution and penalties.
- "ISO is compulsory for every company": It is mostly voluntary.
- "A cheap certificate is enough": A non-accredited ISO certificate may be rejected by buyers and tender authorities.
Be careful with agents who promise very fast or very cheap certificates. For both ISO and ISI, always verify the accreditation or the BIS licence details before you pay.
Need help with ISO certification or BIS compliance? Our team explains which one fits your product and handles the process. Apply for ISO certification with Raj Startup or call +91 9999385617. Frequently Asked Questions
What is the difference between ISO and ISI?
ISO is an international standards body, and ISO certification applies to a business management system. The ISI mark is a product mark issued by BIS for specific products sold in India.
Which is better, ISO or ISI?
They are not comparable. ISO suits businesses that want a certified management system, while ISI is needed for products covered by Indian standards or mandatory orders.
Is ISI mark mandatory in India?
For products covered by a Quality Control Order, yes. For other products it is voluntary.
Who issues the ISI mark?
The Bureau of Indian Standards (BIS) grants the licence to use the mark.
Can I put the ISO logo on my product?
No. An ISO management system certificate does not certify the product, so using it to imply product approval can mislead customers.
Can a company have both ISO and ISI?
Yes. Many manufacturers hold ISO 9001 for their quality system and an ISI licence for specific products.
