Applying for a fresh registration under the GST regime — threshold logic, REG forms, document readiness, and the sign-off sequence that prevents rejection.
The question that decides whether the first GST registration application is approved within three working days or returned with a deficiency notice rarely sits in the form itself. It sits in the documents the finance head assembles before opening the GST portal — the PAN that will be verified against the application, the constitution document that proves the legal entity, the principal place of business proof that has to match the address on the application, the bank account proof that aligns with the entity name, and the photographs and authorisation forms that cover every partner, proprietor, or committee member. When the documentary readiness is complete, applying for a fresh registration under the GST regime is a five-to-seven working-day exercise. When it isn't, the same application can drift through Form GST REG-3 deficiency notices, REG-4 responses, and unanswered REG-5 rejections for weeks.
The aim of this guide is operational rather than theoretical — a sequenced checklist for businesses applying afresh under GST, whether as a new entity that has crossed the registration threshold or as an existing entity registering for the first time after a structural change. The work splits into three phases: confirming registration liability against the threshold, assembling the document readiness pack against Form GST REG-1, and walking through the form sequence that produces the GST registration certificate.
When and why to use this checklist
This compliance checklist applies to new businesses applying for GST registration for the first time, casual or non-resident taxable persons applying for a fresh GSTIN, TDS deductors or TCS collectors registering under the special categories, and existing businesses that have crossed the threshold and now need to register. Each item below names a specific regulatory requirement or statutory form along with the document or sign-off it depends on. The broader ERP subject area discussion for compliance-led businesses treats this initial registration work as the foundation that every subsequent return filing, input tax credit claim, and audit response rests on.
The compliance checklist for fresh GST registration
The sequence below moves from threshold confirmation through final certificate issuance. Skipping any step extends the registration timeline; completing each one in order keeps the application on the standard three-working-day approval path.
Pre-application — confirming liability and readiness
Confirm aggregate turnover against the applicable threshold.
GST registration thresholds split by state category. Aggregate turnover at INR 10 lakh for special category states — Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, Sikkim, Tripura, Himachal Pradesh, and Uttarakhand — and INR 20 lakh for the rest of the country. Aggregate turnover is computed across the entire country under the same PAN, not state-by-state. The finance head signs off this computation against the most recent audited financials before any application is submitted.
Identify whether registration is mandatory irrespective of turnover.
Several categories are required to register regardless of turnover. Taxable persons making inter-state supply, casual and non-resident taxable persons, businesses liable to pay tax under reverse charge, agents supplying on behalf of a taxable person, input service distributors, sellers and operators on e-commerce platforms, persons outside India supplying online information services to unregistered Indian recipients, aggregators supplying services under their own brand, and TDS deductors all fall in this category. Map the business activities against these categories before deciding the form path. Missing this assessment is a common pattern in rejections where the entity later argues turnover but was already required to register on activity grounds.
Choose between regular dealer and composition scheme before submission.
The composition scheme is available to dealers under defined turnover and category limits, with simpler quarterly returns at a lower effective rate, but without input tax credit on inward supplies. Regular dealers file monthly returns and can claim input tax credit. The scheme choice affects every downstream filing cadence, invoice format, and pricing decision. The owner and finance head sign off the classification before Form GST REG-1 is opened — switching the classification after submission requires withdrawal and resubmission, which delays the registration by another statutory cycle.
Assemble the document readiness pack against Form GST REG-1 requirements.
Form GST REG-1 Part B requires a specific document set, and incomplete submission is the most common cause of REG-3 deficiency notices. Each document must match the entity details across name spelling, address, and PAN — mismatches across documents are flagged. The readiness pack covers proof of constitution, proof of principal place of business, proof of bank account, photographs of all stakeholders, and authorisation forms. The checklist table below sets out the standard set against the entity type.
| Document category | What it covers | Acceptable evidence |
|---|---|---|
| PAN | Entity PAN for verification | PAN card scanned in PDF; must match the entity legal name exactly |
| Constitution proof | Legal status of the entity | Partnership deed for firms; certificate of incorporation for companies; registration certificate for other entities |
| Principal place of business | Address proof of the registered premises | Property tax receipt, electricity bill, lease or rent agreement, municipal khata copy |
| Bank account proof | Operational bank account in the entity name | Cancelled cheque, first page of passbook, or recent bank statement |
| Photographs | Each stakeholder photograph | Recent passport-size photograph in JPEG, max 100 KB per file |
| Authorisation | Authorised signatory letter | Board resolution, partnership authorisation, or proprietor self-authorisation |
Application stage — the REG form sequence
Submit Part A of Form GST REG-1 with PAN, mobile, and email.
Part A of Form GST REG-1 captures PAN, mobile number, and email ID. The PAN is verified against the income tax database through the GST portal. An OTP is sent to the registered mobile and email for validation. Once both are verified, the GST portal generates an Application Reference Number, which is the reference for the rest of the submission. The accountant records this ARN against the entity name in the registration tracker.
Submit Part B of Form GST REG-1 with the supporting document set.
Part B is where the document readiness pack from the earlier step gets uploaded. The application captures business details — constitution, principal place of business, additional places of business, goods and services dealt in with HSN/SAC codes, bank account, and authorised signatory details. Each document upload has a file size and format limit; mismatches between the application data and the document content trigger deficiency notices. The finance head reviews the completed application before submission rather than after.
Respond to Form GST REG-3 if a deficiency notice issues.
Form GST REG-3 is issued when the proper officer requires additional information or documents. The notice specifies the gap — mismatched address, unclear constitution document, missing authorisation, or incomplete photograph set are the typical reasons. The deficiency notice arrives on the registered email and on the portal.
Submit the response through Form GST REG-4 within seven days.
Form GST REG-4 carries the additional information sought through Form GST REG-3 and must be submitted within seven days of receiving the deficiency notice. Delay beyond seven days converts the application into a rejection candidate. The accountant flags the seven-day timer in the registration tracker the moment a REG-3 is received; the finance head signs off the response before submission.
Approval stage — certificate, rejection, and special-category forms
Receive the registration certificate through Form GST REG-6.
Form GST REG-6 is the registration certificate issued once the application and any clarifications are accepted. Where no deficiencies surface, the certificate is issued within three working days of complete submission. Where REG-3 and REG-4 are involved, the certificate is issued within seven working days of the REG-4 response. The certificate carries the GSTIN, the effective date of registration, and the entity details — all of which must match the records in downstream tax masters, customer-facing invoices, and vendor-side documentation. The finance head signs off the certificate receipt against the original application data before any operational GST process begins.
Treat a Form GST REG-5 rejection as a recoverable event, not a closed door.
Form GST REG-5 is the rejection order issued where the application and the clarification together are found unsatisfactory. A rejection is not the end of the line — the entity can re-apply afresh after correcting the gaps. Treat REG-5 as a diagnostic document: the rejection reasons are listed and each one is recoverable through a re-submitted application with corrected documents. The finance head reviews the rejection grounds and re-assembles the readiness pack before re-application.
Use Form GST REG-7 for TDS deductors or tax collectors at source.
Form GST REG-7 is the specific registration form for any person registering as a tax deductor (TDS under GST) or tax collector at source (TCS). Government departments, local authorities, public-sector undertakings, and entities notified for TCS fall into this category. The form sequence parallels REG-1 but is filed under this dedicated form. Cancellation of a REG-7 application after submission is handled through Form GST REG-8.
Use the specialised forms for non-resident, casual, or special-category registrations.
Several REG forms cover specialised scenarios. Form GST REG-9 covers non-resident taxable persons. Form GST REG-9A covers persons outside India providing online information and database access services to non-taxable online recipients in India. Form GST REG-10 allows a casual or non-resident taxable person to apply for an extension of the period of operation. Form GST REG-12 is used by multilateral financial institutions, United Nations organisations, or other notified classes to apply for a unique identification number upon certification by the commissioner. Each form has its own document and timing rules; the accountant maintains a registration tracker that lists the form against the entity scenario before any submission begins.
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See how exactllyERP handles operational complexity →How exactllyERP handles this automatically
The work above is one-time, but the operational consequences last for the life of the GSTIN. The GSTIN issued through REG-6 becomes the anchor for every subsequent tax workflow — sales invoice headers, e-way bill generation, vendor GSTIN matching, input tax credit tracking against GSTR-2B, and the GSTR-1 and GSTR-3B return cycle. exactllyERP eliminates GST filing errors and input tax credit mismatches by holding the registration data as the configured source of truth across the GST-ready accounts module, HSN/SAC mapping at item master, vendor GSTIN validation against the GST portal, place-of-supply rules on the customer master, and reconciliation of GSTR-2B against the purchase register. The audit trail captures each transaction back to the source document, which is what makes the statutory audit a documentation exercise rather than a reconstruction project.
How exactllyERP handles this automatically: items 6 (Part B submission accuracy), 11 (vendor GSTIN format and validity), and 12 (specialised entity-type tax treatment) are the three places where the registration data has to flow correctly into the operational tax workflow — and exactllyERP carries the GSTIN, the registered name, the principal place of business, and the entity type as configured masters used by every invoice, e-way bill, and GSTR filing. GST council format changes are absorbed through statutory updates rather than custom rebuilds. Reverse charge auto-triggers on vendor invoice posting. Input tax credit eligibility is tracked against GSTR-2B without manual matching. exactllyERP handles incorrect GSTR filing and HSN code mapping errors automatically through configured rate-slab logic at the item master. See it live in a free demo against your registration data and a sample previous-quarter filing.
