GST Registration: Documents & Timeline Explained

10 August 2026 · 4 min read

GST registration is mandatory once your aggregate turnover crosses the prescribed threshold — ₹40 lakh for most goods businesses and ₹20 lakh for services in regular-category states (lower limits apply in special-category states). It is also compulsory regardless of turnover for inter-state suppliers, e-commerce sellers, and businesses liable under reverse charge. Voluntary registration is allowed and is often worth it for input-tax-credit and credibility reasons.

Documents you will need

• Sole proprietor: PAN and Aadhaar of the proprietor, a photograph, business address proof (electricity bill, rent agreement or owner NOC), and bank account proof (cancelled cheque or statement).
• Partnership firm / LLP: firm PAN, partnership deed or LLP agreement, PAN and Aadhaar of partners, photographs, authorisation letter for the signatory, address proof and bank proof.
• Company: certificate of incorporation, company PAN, MOA/AOA, board resolution authorising the signatory, director PAN and Aadhaar, registered office proof and bank proof.

The process, step by step

The application is filed online as Form GST REG-01 on the GST portal. Part A verifies your PAN, mobile and email with OTPs and issues a Temporary Reference Number (TRN). Part B captures business details, promoters, place of business, goods/services (HSN/SAC) and bank details, followed by document upload and submission with EVC or DSC. An Application Reference Number (ARN) is generated immediately.

How long does it take?

With Aadhaar authentication and complete documents, approval commonly comes in about 7 working days. If the officer raises a query, you receive Form REG-03 and must reply in Form REG-04 within 7 working days — this is where incomplete address proofs most often cause delays. On approval you receive your GSTIN and registration certificate (REG-06) on the portal.

After registration

Display the GSTIN at your place of business, start issuing GST-compliant invoices, and set up your return calendar — typically GSTR-1 and GSTR-3B monthly, or quarterly under the QRMP scheme. If your turnover is modest and you sell locally, evaluate the composition scheme before your first return, not after.

If you want an expert to review your eligibility, documents and scheme choice before filing, post your requirement on Sahi Advise and a verified GST practitioner from your city will reach out.