GST registration photo size — 100 KB per promoter, no pixel rule
The GST portal gives just one number — 100 KB per photograph — and it applies separately to every promoter, partner and authorised signatory.
GST registration photo specification
| Requirement | Value |
|---|---|
| Photograph file size | Maximum 100 KB per photograph (no minimum stated) |
| Whose photographs | Each promoter or partner, and the authorised signatory — all capped at 100 KB |
| Photograph format | The user manual allows PDF or JPEG; the document checklist says JPG |
| Dimensions | Not published — no pixel or cm size appears in the GST portal pages |
| Signature image | None — the application is signed with DSC, e-Signature or EVC |
| Proof of appointment of authorised signatory | Up to 1 MB |
| Blank uploads | Rejected with the message that the document uploaded is blank |
| If Aadhaar authentication is declined | Photo capturing and document verification at a GST Suvidha Kendra is required |
Source: Manual — Registration Application, Normal Taxpayer (GST portal) (undated help page (notes a 27 December 2018 change); read September 2026). checked on 2026-09-06. The user manual allows 'PDF or JPEG' for the photograph while the GST document checklist says JPG only. Both agree on the 100 KB ceiling.
A business form with one photo number
GST registration is unusual on this site because it is not about you as a candidate but about a firm. The GST user manual asks for a photograph of every promoter or partner and of the authorised signatory, each capped at 100 KB, and a proof of appointment for the signatory of up to 1 MB. No pixel dimensions, no DPI, no background rule.
Two official pages, two formats
The manual says the photograph may be PDF or JPEG. The document checklist says JPG. Both agree on 100 KB. Uploading a JPEG keeps you inside either instruction, and it compresses a face far better than a PDF wrapper does.
The error messages tell you what the portal checks
Two responses are worth planning for. If a file is empty, the portal says the document uploaded is blank and refuses it — usually the result of a scanner app saving a page before the capture finished. If a file is legible but poor, the portal offers RETRY or CONTINUE, and choosing CONTINUE stores a document an officer may later query. And if Aadhaar authentication is declined during registration, photo capturing and document verification move to a GST Suvidha Kendra in person.
How it works
- Collect one photograph for each promoter or partner and one for the authorised signatory.
- Crop each photograph to a passport-style head-and-shoulders frame.
- Export each as JPEG under 100 KB — around 60-80 KB keeps faces sharp.
- Scan the proof of appointment of the authorised signatory and keep it under 1 MB.
- Check every file opens correctly before uploading, since blank files are rejected outright.
- Sign the application with DSC, e-Signature or EVC — there is no signature image to upload.