GST Registration Document Upload Size and Format
On the GST registration form (REG-01), a promoter or authorised signatory's photograph must be JPEG format and under 100KB, while proof of constitution can be JPEG or PDF up to 1MB, and bank account proof and authorisation documents JPEG or PDF up to 100KB each. Check the exact limit shown on the specific upload field on gst.gov.in, since it can vary by document type and has changed in past updates.
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On the GST registration form (REG-01), a promoter, partner or authorised signatory's photograph must be a JPEG file under 100KB, while proof of constitution of business (such as a partnership deed or certificate of incorporation) and bank account documents can be JPEG or PDF up to 1MB and 100KB respectively, according to GSTN's own registration tutorial. Place-of-business documents (electricity bill, property tax receipt, rent agreement and similar) have had their own separate limit, for which GSTN's documents list gives no size, so check the exact figure shown on that specific upload field when you fill the form.
Why the numbers differ by document type
Unlike an exam form that gives one photo size and one signature size, GST registration involves many different kinds of attachments: photographs, constitution proof, address proof, bank proof and authorisation letters, each with its own size ceiling. GSTN's own registration tutorial lays these out document by document rather than as a single rule, which is easy to miss if you are used to a simpler exam-style form.
GSTN's list names the accepted place-of-business documents (property tax receipt, municipal khata copy, electricity bill, legal ownership document, rent or lease agreement, consent letter) but does not print a file size for them. A proprietorship needs no constitution proof attachment at all. Treat the numbers below as the pattern to expect, and always check the size shown next to the specific upload box on the live form before you attach anything.
| Document | Format | File size (KB) | Dimensions | Other rules |
|---|---|---|---|---|
| Photograph (promoter/partner/authorised signatory) | JPEG only | Up to 100KB | Passport-style | One photo required for each promoter, partner or signatory record you add |
| Proof of constitution of business (deed, incorporation certificate etc.) | JPEG or PDF | Up to 1MB | - | Exact document depends on the constitution type you select (proprietorship, partnership, company etc.) |
| Proof of principal place of business | JPEG or PDF | Check current limit on the form | - | Ownership, rent/lease, consent letter or NOC depending on how you possess the premises |
| Bank account proof (passbook, statement, cancelled cheque) | JPEG or PDF | Up to 100KB | - | Any one of the accepted document types is enough per account |
| Letter of authorisation / Board resolution | JPEG or PDF | Up to 100KB | - | Needed to prove who is authorised to sign the application |
Source: GSTN registration tutorial, tutorial.gst.gov.in (documents required for new GST registration). The list gives no size for place-of-business proof; confirm the current figure on the live REG-01 form.
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Step-by-step: preparing your GST registration documents
- List every document your constitution type needs (the REG-01 form shows this once you select proprietorship, partnership, company etc.).
- Scan or photograph each document clearly, keeping text legible rather than just visually similar.
- Save the photograph as JPEG and check it is under 100KB before uploading.
- Save constitution, bank and authorisation documents as JPEG or PDF, checking each against the size shown next to its specific upload field.
- Compress any file that is too large rather than lowering the scan resolution so much that text becomes unreadable.
- Upload each document to its correct field; GSTN's application will not accept a bank proof file in the constitution proof field even if the size is fine.
Keep every scan at a size where the text is still clearly readable after compression. A GST officer who cannot read a blurry, over-compressed rent agreement can raise a query on your application, which delays approval far more than a slightly larger file would have.
What happens if a file is rejected for size
The GST portal typically shows an error naming the exact limit for that field the moment you try to attach an oversized file, rather than accepting it and failing later, so you usually find out immediately. If a scanned property document genuinely will not fit inside the limit at readable quality, try splitting a multi-page proof into the single most relevant page, or re-scan at a lower but still legible resolution, rather than repeatedly trying to compress the same over-detailed scan.
If you are registering as a Tax Deductor, Collector or GST Practitioner
The same document-size pattern (a small JPEG-only photo limit, a larger JPEG/PDF limit for constitution and bank proof) repeats across GSTN's other registration forms, including registration as a Tax Deductor, Tax Collector and GST Practitioner, each of which has its own document checklist on the same tutorial page. If you are filing one of these instead of a regular business registration, look up that specific checklist rather than assuming the regular REG-01 list applies exactly, since the required proof documents differ even though the size pattern is similar.
Common mistakes on GST registration uploads
- Uploading a photograph as PNG instead of JPEG, which the promoter/signatory field does not accept.
- Assuming every document shares the same 1MB limit, when bank proof and the photograph have smaller ceilings.
- Scanning documents at very high resolution and then trying to compress a huge file down to 100KB, losing legibility in the process.
- Not checking the current limit for place-of-business proof, which the GSTN documents list does not state.
Once your GST registration is approved, you may also need to self-attest copies of some of these same documents for other filings. For ongoing GST paperwork, the PDF to Excel converter is useful for turning downloaded returns or ledgers into an editable spreadsheet.
Tools for this
Frequently asked questions
What format does the GST registration photograph need to be?
JPEG only, up to 100KB, for every promoter, partner or authorised signatory record you add to the application.
Can I upload a PDF for my proof of constitution?
Yes. Proof of constitution of business (partnership deed, certificate of incorporation and similar) can be uploaded as either JPEG or PDF, up to 1MB, according to GSTN's registration tutorial.
What is the file size limit for place-of-business documents like an electricity bill?
GSTN's documents list for new registration names the accepted place-of-business documents but does not state a file size for them. Check the exact figure shown on that specific upload field on the live form.
My scanned rent agreement is too large. What should I do?
Compress the PDF with a tool that targets a specific KB or MB size, or re-scan at a slightly lower resolution while keeping the text legible, rather than uploading a lower-quality image that an officer cannot read clearly.
Does the bank account proof need to be a PDF?
No. Bank account proof such as a passbook first page, bank statement or cancelled cheque can be uploaded as JPEG or PDF, up to 100KB, per GSTN's documentation list.
Sources
- GSTN, Documents Required for GST Registration (registration tutorial) (checked 2026-09)
Rules and limits change. Always check the latest official notification or portal before you submit a form.