Voluntary BIS Standards

ISI Mark for New Insulating Oils – IS 335

VoluntaryPetroleum & Lubricants

BIS ISI mark (Scheme-I)

IS 335

Minimum marking fee per year: ₹17,200 – ₹86,000; Micro to large firms
Testing cost: ₹21,000; Guide price from one lab
HSN code: 27101980; Check the code with customs

There is no Quality Control Order (QCO) for New Insulating Oils today. This means the ISI mark for IS 335 is optional. Many makers still get it, because government tenders, large buyers and online marketplaces often ask for it.

How it works: a BIS-approved lab tests your samples against IS 335. A BIS officer then visits your factory. If everything is in order, BIS gives you a licence. You can then print the ISI mark with your licence number (CM/L number). Factories outside India apply under the Foreign Manufacturers Certification Scheme (FMCS). They must also name a representative in India, called an Authorised Indian Representative (AIR).

Every year you pay BIS a minimum marking fee. It is ₹17,200 for micro firms and ₹86,000 for large firms. The fee also depends on how much you make: ₹8.70 per kilolitre. You pay whichever amount is higher. Lab testing costs about ₹21,000 per sample, based on quotes from one BIS-approved lab. These prices are a guide only and do not include GST.

Indian Standard covered

IS number	Product	Testing cost
IS 335	New Insulating Oils	₹21,0001 lab

Minimum marking fee by firm size

You pay BIS a minimum marking fee every year. Micro, small and medium firms (with Udyam registration) pay less. BIS also works out a fee from the unit rate and your production. You pay whichever amount is higher.

Large firms: ₹86,000
Medium firms: ₹71,000
Small firms: ₹43,000
Micro firms: ₹17,200

Unit rate: ₹8.70 per kilolitre

Other BIS charges: ₹9,000 for every ISI mark product: application charge ₹1,000 · licence fee ₹1,000 · audit charges ₹7,000
Foreign manufacturers: Get a detailed quote
Our consulting fee: Best-value quote – let’s talk

All prices are a guide only and do not include GST. Rules and dates can change, so check the latest notice before you apply. Ask us for an up-to-date quote.

Common questions

Is BIS certification mandatory for New Insulating Oils?

No. There is no Quality Control Order for it today, so the ISI mark is optional. It can still help you win tenders and gain the trust of buyers.

What is the BIS marking fee for New Insulating Oils?

The minimum fee each year is ₹86,000 for large firms, ₹71,000 for medium firms, ₹43,000 for small firms and ₹17,200 for micro firms. Your firm size comes from your Udyam registration. BIS also works out a fee at ₹8.70 per kilolitre. You pay the higher amount. GST is extra. These figures are a guide, based on the BIS fee list.

How much does testing for IS 335 cost?

Lab charges are usually ₹21,000 per sample. This is based on quotes from one BIS-approved lab. The final price depends on your model, its versions and the tests needed.

What is the HSN code for New Insulating Oils?

It usually comes under HSN 27101980. Check the code on your bill of entry, because customs decides the code for the exact product.

Can a foreign manufacturer get the ISI mark?

Yes. Factories outside India apply under the Foreign Manufacturers Certification Scheme (FMCS). They must also name a representative in India, called an Authorised Indian Representative (AIR). The licence is in the name of the factory. Once the product is mandatory, importers cannot clear the goods at customs without it.

How long does BIS certification take?

Factories in India usually get a licence 30 to 60 days after a good test report. Factories outside India (FMCS) should plan for four to six months, including the factory visit.

See all 1,071 in Voluntary BIS Standards

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