DSC for GST Registration in India

If you run a company or LLP, the GST portal will ask you to sign with a Digital Signature Certificate. Here is exactly which DSC you need for GST, who can skip it, and how to register and use it without the usual errors.

Is a DSC mandatory for GST?

It depends on your business type. Companies and LLPs must use a DSC to sign GST registration and returns — there is no alternative for them. Proprietors and individuals/partnerships can instead use the EVC (electronic verification code) option, where an OTP is sent to the registered mobile and email. So if you are a Private Limited company, OPC or LLP, a DSC is compulsory for GST.

Which DSC do you need for GST?

For GST you need a Class 3 Organisation certificate, issued in the name of the authorised signatory of the business. A Signing certificate is enough for GST — you do not need the more expensive Combo (Sign + Encrypt) variant unless you also bid on e-tenders. Not sure which one applies to you? See which DSC you need.

How to register your DSC on the GST portal

Once you have your Class 3 certificate on a USB token, registering it on gst.gov.in takes a few minutes:

• Install the token driver and the emSigner utility, then run emSigner as administrator.
• Log in to the GST portal and open My Profile → Register / Update DSC.
• Select the authorised signatory's PAN, tick the declaration and click Proceed.
• Pick your certificate from the token and sign — the portal confirms the DSC is registered.

You only register once per signatory; after that you simply sign each return with the token.

Common GST DSC errors (and quick fixes)

Most GST signing problems come down to a handful of causes: emSigner not running (open it and run as admin), the token driver missing, a browser blocking the local emSigner port, or an expired certificate. Our fix DSC & emSigner errors guide walks through each one.

Frequently asked questions