How to apply for GST Number?

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3999 1999/-
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7398 3,699
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How to Apply for GST Number: A Complete Step-by-Step Guide

Whether you’re a freelancer, small business owner, or startup founder — if your turnover crosses the threshold, you need a GST number. Here’s everything you need to know, in plain language.

What is a GST Number?

A GST number — formally called a GSTIN (Goods and Services Tax Identification Number) — is a unique 15-digit alphanumeric code assigned to every business registered under India’s Goods and Services Tax regime. It replaced the old fragmented tax system (VAT, service tax, excise duty) with a single unified framework.

The number encodes your state code, PAN, entity type, and a check digit, making it easy for the government to track transactions and for buyers to verify your credentials instantly on the GST portal.

Having a GSTIN lets you collect GST from customers, claim input tax credits on your purchases, and file returns — all of which are essential if you’re doing business with other GST-registered companies.

Who Needs to Register for GST?

Registration is mandatory if you fall into any of these categories:

  • Your aggregate annual turnover exceeds ₹40 lakhs (goods) or ₹20 lakhs (services)
  • You supply goods across state lines (inter-state supply) — regardless of turnover
  • You sell on e-commerce platforms like Amazon, Flipkart, or Meesho
  • You are a non-resident taxable person conducting business in India
  • You are an input service distributor or a casual taxable person
  • You receive Payment under the reverse charge mechanism

Even if your turnover is below the threshold, voluntary GST Registration can help you claim input tax credits and appear more credible to larger business clients.

Special category states like Himachal Pradesh, Uttarakhand, and northeastern states have a lower threshold of ₹10 lakhs for services. Always verify the current limit for your state before deciding.

Documents Required for GST Registration

Before you start the online process, keep scanned copies of these documents ready. All files should be in JPG or PDF format, and each should be under 1 MB.

  • PAN card of the applicant or business entity
  • Aadhaar card of the proprietor, partners, or directors
  • Proof of business address — electricity bill, rent agreement, or NOC from the property owner (not older than 2 months)
  • Bank account details — cancelled cheque or bank statement with your name, account number, and IFSC
  • Passport-size photograph of the applicant
  • Certificate of incorporation — for companies and LLPs
  • Authorization letter or board resolution — if an authorized signatory is applying on behalf of a company

Make sure your PAN and Aadhaar are linked before applying. Mismatches between name spellings or date of birth can delay or reject your application.

How to Apply for GST Number: Step-by-Step

The entire process happens online through the official GST portal at gst.gov.in. It typically takes 7–10 working days from submission to receiving your GSTIN — sometimes faster.

Step 01 Go to the GST portal

Visit gst.gov.in and click "Register Now" under the Taxpayers section.

Step 02 Part A — Basic details

Select "New Registration", enter your PAN, mobile number, and email. Verify via OTP.

Step 03 Note your TRN

A Temporary Reference Number (TRN) is generated. Save it — you'll use it to resume Part B.

Step 04 Part B — Full application

Log in with your TRN, fill all 10 tabs: business details, promoters, address, goods/services, bank details, and upload documents.

Step 05 Submit with DSC or EVC

Sign and submit using a Digital Signature Certificate (DSC) or Electronic Verification Code (Aadhaar OTP).

Step 06 Track and receive ARN

After submission, you get an Application Reference Number (ARN) by SMS and email. Use it to track status.

What Happens After You Get Your GST Number?

Once you receive your GSTIN, a few things change immediately:

  • You must display your GSTIN on every invoice, bill of supply, and business signboard at your premises
  • You are required to file GST returns — GSTR-1 (sales), GSTR-3B (summary), and possibly GSTR-9 (annual) depending on your turnover
  • You can now collect GST from your customers and pass on input tax credits to them
  • You are eligible to claim input tax credit (ITC) on purchases made for your business

Missing return deadlines results in late fees of ₹50 per day (₹25 CGST + ₹25 SGST), and interest of 18% per annum on unpaid taxes. It’s a good idea to set calendar reminders or use a GST Filing service to stay compliant.

Good news: If your turnover is under ₹1.5 crore, you may be eligible for the Composition Scheme — lower tax rates and quarterly filing instead of monthly, making compliance much simpler.

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