GST Registration — Documents Required and Common Mistakes to Avoid

Introduction

GST registration is mandatory for most businesses supplying goods or services in India above the threshold turnover. The registration process is entirely online through the GST portal (gst.gov.in), and while the steps are straightforward, incorrect or incomplete documentation is the leading cause of rejections and delays.

This guide gives you the complete document checklist for GST registration and walks through the most common mistakes that applicants make — so you can get it right the first time.

Who Needs to Register for GST?

GST registration is mandatory if:

Voluntary registration is also available for businesses below the threshold who wish to claim Input Tax Credit or deal with GST-registered clients.

Document Checklist by Entity Type

For Proprietorship

For Partnership Firm / LLP

For Private Limited Company / Public Limited Company

Address Proof — what is Accepted

The registered place of business must be proved with:

If premises is owned:

• Property tax receipt, or
• Municipal Khata copy, or
• Copy of electricity bill in the applicant's name

If premises is rented/leased:

• Rent/lease agreement (registered or notarised), AND
• Latest electricity bill in the landlord's name, AND
• No Objection Certificate (NOC) from the landlord

If premises is provided free of cost (e.g., using family property):

• Consent letter from the owner, AND
• Latest utility bill of the owner

Important: The address in the GST application must exactly match the address in the utility bill or property documents. Even a minor discrepancy (e.g., "LGF" vs "Lower Ground Floor") can cause the application to be rejected.

Bank Account Proof — what is Accepted

Any one of the following is acceptable:

• Cancelled cheque (with pre-printed account number and IFSC)
• First page of bank passbook (with account holder name, account number, IFSC)
• Bank statement (first page, showing account details)

The bank account must be in the name of the entity being registered. A proprietor's personal account can be used for proprietorship registration, but a company must provide a bank account in the company's name.

The Registration Process (Overview)

1. 1Part A — Apply on GST portal: Enter business name, PAN, email, and mobile. OTP verification.
2. 2TRN (Temporary Reference Number) generated
3. 3Part B — Upload documents: Fill business details, upload all documents, submit DSC/EVC.
4. 4Application Reference Number (ARN) generated
5. 5GST officer review: The officer can approve, seek clarification (raise a query), or reject.
6. 6GSTIN issued on approval — typically within 3–7 working days (for applications that don't require site visit)

Common Mistakes That Cause Rejection or Delay

Mistake 1: Name mismatch between PAN and business registration documents.

The name as it appears in your PAN must match the name in your business registration documents. For example, if the PAN shows "Raghav Sharma" but the firm's documents show "Raghav Kumar Sharma," the application will be flagged.

Mistake 2: Uploading low-quality or unreadable documents.

The GST portal rejects blurry scans, sideways images, or documents where text is not clearly legible. Use a proper scanner or a scanning app that produces high-resolution, clearly readable files.

Mistake 3: Wrong file format or file size.

The portal accepts JPEG, PNG, and PDF. Maximum file size is typically 1 MB per document. Large files must be compressed before upload.

Mistake 4: Address not matching utility bill.

The address entered in the application must exactly match the address in the utility bill/property document. Abbreviations, missing floor details, or spelling differences cause rejections.

Mistake 5: Not responding to officer queries within the deadline.

After submission, the GST officer may raise a query within 3 working days. You have 7 working days to respond. Missing this window means the application is rejected and you must refile from scratch.

Mistake 6: Providing a bank account in a different name.

A company applying for GST registration must provide a bank account in the company's name. Providing a director's personal account — even temporarily — will cause the application to fail.

Mistake 7: Incorrect HSN/SAC codes.

Every business must declare the goods or services it supplies, with corresponding HSN (for goods) or SAC (for services) codes. Incorrect codes cause downstream problems with GSTR-1 filing and ITC claims.

After Registration — what to do Immediately

Once GSTIN is issued:

1. 1Display GSTIN on your invoices, letterheads, and at your place of business (mandatory)
2. 2Start issuing GST-compliant invoices for all taxable supplies
3. 3Understand your return filing obligations:

• GSTR-1: Monthly/quarterly (outward supplies)
• GSTR-3B: Monthly (summary return + tax payment)

1. 1Set up your accounting to track Input Tax Credit (ITC) — what GST you can claim on purchases

Key Takeaways

• GST registration is mandatory above specified turnover thresholds — and for inter-state supply regardless of turnover
• Collect all documents before starting the application; incomplete applications cause avoidable delays
• Address proof must exactly match — discrepancies are the most common reason for rejection
• Bank account must be in the entity's name
• Respond to officer queries within 7 working days or you'll need to refile
• Incorrect HSN/SAC codes cause downstream compliance problems — look these up carefully

When to Seek Professional Help

GST registration itself is not complex if your documents are in order. But if your business has multiple business verticals, multiple place of business, inter-state operations, or if you are registering as a non-resident taxable person, the application becomes significantly more complex. Similarly, if your registration was rejected or you are facing officer queries, professional assistance makes the process faster and more certain.