ISI Mark vs BIS Standard Mark vs CRS: What's the Real Difference?

Indian compliance has multiple BIS marks and many manufacturers use the names interchangeably — yet the ISI Mark, BIS Standard Mark, and BIS CRS R-number are different markings issued under different schemes with different rules. Confusing them in tender documents, e-commerce listings, or import paperwork triggers customs holds, marketplace de-listing, and customer complaints. This guide explains each marking, when it applies, and how to verify which one your product needs.

🔖 ISI Mark

The ISI Mark is India's oldest BIS marking, in continuous use since 1955. It is granted under the BIS Act for products listed in Schedule-I of the BIS Conformity Assessment Regulations. The ISI Mark is awarded under either the Indian Manufacturer's Licence for domestic factories or the FMCS Licence for foreign factories. The mark appears as the recognisable ISI logo with a 7-digit CM/L licence number printed alongside. Common ISI products include cement, steel, helmets, water bottles, electrical accessories, kitchen utensils, and selected appliances.

🎙️ BIS Standard Mark

The BIS Standard Mark is a broader concept used in BIS regulations to refer to any mark that signifies conformity to an Indian Standard — it includes the ISI Mark for products in Schedule-I. In practice, the term is sometimes used in tender language to mean the ISI Mark. Other Standard Marks include the Hallmark for jewellery and the Eco-Mark for products meeting environmental criteria. The BIS Standard Mark is therefore a category, not a single marking — always read the underlying scheme cited in the QCO or tender.

🔢 BIS CRS R-Number

The BIS CRS R-number is a 10-digit registration number granted under the Compulsory Registration Scheme for electronics, IT, and a growing list of consumer-facing products notified by MeitY. There is no logo — the marking is the alphanumeric string itself, prefixed with “R-”. CRS-listed products carry the R-number on the product, packaging, and product literature. Examples include LED bulbs, mobile phones, laptops, power banks, smart meters, and lithium-ion batteries.

🔍 Side-by-Side Comparison

📋 How to Identify the Correct Marking for Your Product

1. Find the QCO NotificationLocate the Quality Control Order or notification covering your product. The notification names the scheme and standard explicitly.
2. Check the BIS Notification ListBIS publishes the current list of CRS-notified and ISI-notified products on its portal. Match your HS code and product description.
3. Confirm the Required MarkIf the notification cites Schedule-I and FMCS / domestic licence, the ISI Mark applies. If MeitY-notified electronics, CRS R-number applies.
4. Update Label ArtworkProvide artwork that shows the correct mark plus accompanying information (CM/L number for ISI, R-number for CRS, importer details for foreign-made products).

⚠️ Common Mistakes

Manufacturers often print the ISI logo on a CRS-only product, or print only the CRS R-number on a product that requires the ISI Mark. Both are violations under the BIS Act. E-commerce platforms remove listings where the marking shown does not match the BIS database lookup. Importers face customs detention if the marking on the consignment label does not match the certificate cited in the bill of entry.

🎯 Recommendation

Maintain a single SKU master that lists, for each product, the applicable BIS scheme, certificate number, validity, marking type, and approved label artwork file. Update the master immediately on every renewal. This prevents the most common compliance failures: showing the wrong mark on packaging, citing an expired certificate in tender documents, or failing customs inspection because the printed mark does not match the BIS database lookup.