Document Size for GST Registration

One of the most frequent problems business owners encounter when registering for GST in India is uploading documents in the correct size and format. Regardless of whether you are registering your company as a proprietorship, partnership, LLP, or private limited company, you need to know the size of the document to be used in registering your company so that your registration is not rejected due to technicalities or delay in processing the registration.

This guide contains information on the required file size, the forms and types of documents to register for GST, and some tips for easily uploading documents on the GST official portal.

Why Document Size Matters for GST Registration

The GST registration process is completely online, and all documents are uploaded to the GST portal. The system has certain technical constraints on file format and size. Your application may be rejected or delayed if your documents exceed these limits or are uploaded in an unsupported format.

It is therefore important that you ensure that every document is in line with the size and format requirements to ensure that your registration process for GST is a success.

Business owners should follow certain document guidelines to submit the correct documents to complete GST registration without facing portal upload errors. Ensuring the right file size, format, and document clarity helps the GST portal process applications smoothly and reduces the chances of rejection.

Stipulated File Size and Form of GST Registration Documents

Goods and Services Tax Network (GSTN) recommends the following procedures for uploading documents in registering GST:

1. Supported File Formats PDF or JPEG (JPG)
2. Maximum File Size: 1MB per document.
3. Minimum File Size: It does not have a definite size, as the document should be clear and readable.
4. Image Resolution: No lower than 150 DPI to have better legibility.

All documents including PAN, Aadhaar, address, bank, or business proof are required to be under 1 MB size limit and have a readable verification.

Document Required for GST Registration and Best File Size

Various categories of business entities require different documents for GST registration. The list of documents usually needed and their recommended file sizes for easy upload is shown below.

1. Proprietorship Firm

For proprietorship, the required documents are:

1. PAN Card of the Proprietor – PDF or JPEG (under 1 MB)
2. Proprietor Aadhaar Card – PDF or JPEG (under 1 MB)
3. Address Proof – Electricity Bill, Rent Agreement, Property Tax Receipt (under 1 MB)
4. Bank Account Proof – Bank Statement or Cancelled Cheque (under 1 MB)
5. JPEG photograph of Proprietor (less than 100 KB)

Assuming these documents can be provided without exceeding the recommended size will prevent the GST portal from failing to upload your documents, which may occur due to a system limitation rather than the information you are attempting to upload.

2. Partnership Firm or LLP

In the case of a partnership or limited liability partnership (LLP), the following are needed:

1. Partnership Deed / LLP Agreement – PDF (less than 1 MB)
2. PAN Card of Firm and Partners- PDF (less than 1 MB each)
3. Partners Aadhaar Cards – PDF (less than 1 MB each)
4. Principal Place of Business Proof – PDF (less than 1 MB)
5. Bank Account Proof – PDF (less than 1MB)
6. Board Resolution or Authorization Letter – PDF (less than 1MB)
7. Photographs of Partners / Authorized Signatory – JPEG ( less than 100 KB each)

It is also important to ensure that the documentation used for GST registration is the correct size, as the documentation for various partners is more than one.

3. Private Limited Company / OPC

In the case of private limited companies and one-person companies (OPCs), the requirements of documents comprise:

1. Certificate of Incorporation – PDF (less than 1MB)
2. PAN Card of Company – PDF (less than 1 MB)
3. MOA and AOA (Memorandum and Articles of Association) PDF (Less than 1 MB each)
4. PAN and Aadhaar of Directors – PDF (less than 1MB each)
5. Registered Office Address – Rent Agreement or Ownership Proof (Smaller than 1 MB)
6. Bank account Proof – PDF (less than 1 MB)
7. Board Resolution of Authorized Signatory – PDF (less than 1MB)
8. Director / Authorized Person Photographs – JPEG (less than 100 KB each)

Business entities should make sure that all the documents uploaded are concise, clear, and do not exceed 1 MB; otherwise, they might be rejected.

How to Reduce the Document Size for GST Registration?

Certain applicants have difficulty uploading their files due to their large size. To achieve the maximum limit to which the files are admissible, observe the following:

1. Online PDF compressors such as Small PDF, iLove PDF or Adobe Compress PDF.
2. Use a scan of 150-200 DPI resolution to create lightweight images that are clear.
3. To save on space, save images in JPEG rather than in PNG.
4. Eliminate any unwanted borders or blank pages before uploading.
5. Do not utilize high-resolution mobile images, which are bigger than 2-3 MB.
6. Create a compressed PDF with several pages when necessary.

Common Upload Errors and How to Avoid Them?

Simple upload errors may lead to rejection of the applicants. The following are some of the widespread mistakes and how to prevent them:

1. Sending files that are more than 1 MB in size – compress them first.
2. Turning in unclear or blurred scans – make them clear.
3. Attaching files of unsupported types, such as DOCX or PNG.
4. Posting black and white copies rather than colour scans.
5. Omitting uploading the authorization letter of authorized signatory.
6. Applying old or incompatible PAN/Aadhaar numbers.

If you notice incorrect details after submitting your application, you can correct them later through the GST registration amendment process to update your business information on the GST portal.

GST Registration Document Checklist Before Upload

Before submitting your GST registration application, check the following:

• PAN details are correct.
• Applicant/business name matches the relevant records.
• Identity documents are clear.
• Photographs meet the applicable size and format requirements.
• Constitution documents are complete.
• Address proof is current and readable.
• Rent/lease documents are complete where applicable.
• Consent/authorisation documents are signed where required.
• Files are in an accepted format.
• Files do not exceed the limit shown for the relevant upload field.
• PDFs open correctly.
• Scanned pages are readable.
• No unnecessary blank pages are included.
• The correct document has been uploaded in each field.

Documents to be submitted by the business on the basis of the Constitution of Business chosen by the Applicant:

When documents pertaining to the promoters of the company or business establishment are being uploaded, photographs of each are required. The size allowed shall be 100 KB, and the format must be JPEG only.

Documents provided as proof for the Authorised Signatory (AS)

Documents for proof of Bank Account Details

Documents Required for being Registered as a Tax Deductor or Tax Collector

If the applicant wishes to register as a tax deductor, the following documents, as specified below, must be scanned and kept ready as part of the compliance procedure.

Details of documents to be made ready on the basis of the Constitution of Business

Documents that can be submitted as proof for the Principal Place of Business

Documents that can be submitted by the applicant as proof for the principal place of business, based on the nature of such place in which the business is run or registered, would be as follows:

Conclusion

Most business owners are more interested in uploading the correct-sized document to register for GST than they think. One file that is either over or unclear can result in your application being rejected or postponed, causing needless frustration.

Following the size limit of 1 MB, proper formats, as well as maintaining neat and legible documents, can help you go through the GST registration process without any difficulties. These technical guidelines will help you sail your application smoothly, whether you are registering a small proprietorship or a flourishing company.

Why Choose Kanakkupillai for GST Registration?

Choosing the right professional for GST registration is important because errors in business details, supporting documents or the application can lead to clarification requests, delays or the need for corrections. Kanakkupillai brings 19+ years of experience in business, tax and compliance support, helping businesses navigate registration requirements with professional guidance.

19+ Years of Experience Supporting Businesses

Since 2007, Kanakkupillai has supported startups, entrepreneurs and established businesses with accounting, taxation, legal and regulatory compliance services. This long-standing experience helps our team understand the practical documentation and compliance requirements businesses face at different stages of growth.

• Professional GST & Compliance Support
• Document Review Before Filing
• End-to-End GST Support
• Clear Guidance on GST Requirements
• Support Beyond Registration
• Trusted Business Compliance Platform

Kanakkupillai operates as the online platform of Govche India Private Limited and provides business registration, taxation, accounting, legal and compliance services through a professional team that includes Business Analysts, Company Secretaries, Chartered Accountants, Corporate Lawyers and financial professionals.

Written by: Kanakkupillai GST & Compliance Team
Reviewed by: Vaishnavi B (Chartered Accountant)  
Experience:19+ years supporting businesses with tax, accounting and regulatory compliance
Last updated: September 2026
Regulatory sources: GST Portal, GSTN, CBIC and applicable GST notifications