What is GSTR 1?

Updated: Jun 3, 2026 12 min read Madan Murari
Quick Summary
  • GSTR1 is a GST return form that businesses must file monthly or quarterly to report sales and enable customers to claim Input Tax Credit.
  • The form includes sections for B2B and B2C sales, exports, credit/debit notes, and amendments, among others.
  • Businesses with a turnover above ₹5 crore file monthly, while those under ₹5 crore can opt for quarterly filing under the QRMP scheme.
  • Certain entities like Input Service Distributors and Composition Dealers are exempt from filing GSTR1.
  • Late filing incurs a daily fee and interest, and errors in GSTR1 can be corrected in subsequent filings.

All taxpayers who have registered under GST are required to file their GST returns as per GST Law. By filing these returns, taxpayers and the government get clarity on the amount of GST to be paid. To file these returns correctly and with minimal fuss, the taxpayer must have GST-compliant invoices for both sales and purchase transactions. GSTR 1 is a crucial form that must be completed in order to start the process of filing of these returns. This is because the information submitted in GSTR 1 serves as the foundation for auto-populating all other forms.

In this article, we will understand what is GSTR-1, including the sections under it, when it is due, who is liable to file it, and  penalties for late filing . After reading this article, you should be a step closer to ensuring your business is GST-compliant.

Return filing can be a complicated process. To make it easier, consider investing in a robust  GST Accounting Software  that makes GST compliance smooth.

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What Does GSTR-1 Mean?

GSTR-1 is a monthly or quarterly GST return that every registered business must file to report all outward supplies—that is, sales of goods or services. It includes invoice details for sales to both registered and unregistered buyers, exports, and credit/debit notes.

Filing GSTR-1 is important because:

  • It helps the government track your tax liability.
  • It enables your customers to claim  Input Tax Credit (ITC) .
  • It ensures transparency and compliance under  GST .
  • Even if there are no sales, a Nil GSTR-1 must be filed.

Structure of GSTR-1 Form

Section

B2B (Business-to-Business)

Description

Invoice-wise sales to registered GST buyers within or outside the state

Section

B2C (Large Transactions)

Description

Interstate sales to unregistered buyers where invoice value is over ₹2.5 lakh

Section

B2C (Others)

Description

Sales to unregistered buyers within the state or small-value interstate sales

Section

Exports

Description

Details of zero-rated supplies made outside India (with or without payment of tax)

Section

Debit/Credit Notes

Description

Any corrections made to previously issued invoices, whether B2B or B2C

Section

Nil/Exempt/Non-GST Supplies

Description

Sales of items not attracting GST, like exempted goods or zero-rated supplies

Section

Amendments

Description

Corrections to data filed in earlier GSTR-1 returns

Section

HSN Summary

Description

HSN-code wise summary of goods or services supplied

Section

Document Summary

Description

Total count of all invoices, debit/credit notes, and delivery challans issued

Sections in GSTR-1 Form

Section No.

1

Section Title

GSTIN

What You Need to Report

Your 15-digit GST number

Section No.

2

Section Title

Name

What You Need to Report

Auto-filled from your GST profile

Section No.

3

Section Title

B2B Invoices

What You Need to Report

Sales to GST-registered buyers (invoice-wise)

Section No.

4

Section Title

B2C Large Invoices

What You Need to Report

Interstate sales above ₹2.5 lakh to unregistered buyers

Section No.

5

Section Title

B2C Others

What You Need to Report

Other sales to unregistered customers

Section No.

6

Section Title

Exports

What You Need to Report

Details of goods/services sold outside India (zero-rated)

Section No.

7

Section Title

Credit/debit notes (Registered)

What You Need to Report

Notes issued to adjust earlier invoices to registered customers

Section No.

8

Section Title

Debit/credit note (Unregistered)

What You Need to Report

Notes issued to adjust invoices for unregistered buyers

Section No.

9

Section Title

Nil/Exempt/Non-GST Supplies

What You Need to Report

Supplies that are nil-rated, exempted, or not covered under GST

Section No.

10

Section Title

Amendments

What You Need to Report

Corrections to details filed in previous GSTR-1 returns

Section No.

11

Section Title

Advances Received/Adjusted

What You Need to Report

Advance payments received for future sales or adjusted against invoices

Section No.

12

Section Title

HSN-wise Summary

What You Need to Report

Summary of goods/services sold with HSN codes

Section No.

13

Section Title

Document Summary

What You Need to Report

Count of all invoices, debit/credit notes, and challans issued

When is GSTR-1 Due?

The turnover of a business determines its GSTR-1 due date. GSTR-1 returns must be filed either monthly or quarterly, depending on the business’s turnover. Businesses can file GSTR-1 and  GSTR-3B  quarterly if their annual revenue is up to ₹5 crore and they have opted for the QRMP Scheme; otherwise, they must file monthly returns if their annual turnover exceeds ₹5 crore.

GSTR-1 Due Dates

Monthly Filers (Turnover above ₹5 crore or opted for monthly filing)

Tax Period

January 2025

Due Date

11th February 2025

Tax Period

February 2025

Due Date

11th March 2025

Tax Period

March 2025

Due Date

11th April 2025

Tax Period

April 2025

Due Date

11th May 2025

Tax Period

May 2025

Due Date

11th June 2025

Tax Period

June 2025

Due Date

11th July 2025

Tax Period

July 2025

Due Date

11th August 2025

Tax Period

August 2025

Due Date

11th September 2025

Tax Period

September 2025

Due Date

11th October 2025

Tax Period

October 2025

Due Date

11th November 2025

Tax Period

November 2025

Due Date

11th December 2025

Tax Period

December 2025

Due Date

11th January 2026

Quarterly Filers (QRMP Scheme – Turnover up to ₹5 crore)

Quarter

Jan – Mar 2025

Due Date

13th April 2025

Quarter

Apr – Jun 2025

Due Date

13th July 2025

Quarter

Jul – Sep 2025

Due Date

13th October 2025

Quarter

Oct – Dec 2025

Due Date

13th January 2026

Note:

  • Monthly filers must submit GSTR-1 by the 11th of the following month.
  • QRMP (Quarterly Return Filing with Monthly Payment) filers must submit by the 13th of the month following the end of the quarter.
GSTR-1 filing steps and due dates

Who is Liable to File GSTR-1?

Each registered dealer must complete the GSTR 1 filing process. The same is required and unaffected
by the transactions that occurred that month. If you are a registered dealer, you must complete the
GSTR-1 filing process even if there are no sales or transactions (this is called filing Nil
returns). However, the following people or companies are excluded from submitting GSTR 1:

  1. Input Service Distributor: Any commercial organisation that receives invoices for services used
    by its various branches is automatically considered an  input service
    distributor
     (ISD) according to the GST regime.
  2. Composition Dealer: Beginning on April 1, 2019, companies with a maximum yearly turnover of 1.5
    Crores may choose to participate in the  gst
    composition scheme
    . These companies are exempt from submitting GSTR 1.
  3. A supplier of online information, database access, or retrieval service providers are exempt
    from the GSTR-1 filing requirement.
  4. Non-resident taxable person: You are also free from submitting GSTR 1 on behalf of your company
    if you come within the category of non-resident taxable people.
  5. This does not apply to taxpayers responsible for collecting tax at source (TCS) or  deducting
    tax at source
     (TDS).

Pre-Requisites for Filing GSTR-1

You must have a 15-digit PAN-based GSTIN and be a GST-registered taxpayer.

You must maintain detailed invoices with distinct serial numbers for your transactions, including
intrastate and interstate transactions, business-to-business (B2B), and retail (B2C) sales. This
also covers stock transfers between your company’s locations in other states and transactions
involving exempt and non-GST products.

To validate your return using an EVC (electronic verification code) or a digital signature
certificate, you must either have an OTP from your registered phone (class 2 or higher). Using an
Aadhar-based e-sign, you can also submit your GST returns.

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How to File GSTR-1?

On the GSTN platform, filing GSTR 1 is simple. Simply follow the instructions listed below to submit
your GSTR-1 using the GSTN portal:

  1. Step 1: Log in to the GSTN portal using the User ID and password provided.
  2. Step 2: Choose “Services.”
  3. Step 3: Select “Returns.”
  4. Step 4: On the “Returns Dashboard,” choose the month and year you want to file the return.
  5. Step 5: Click on “GSTR-1” after the returns for the given time have been displayed.
  6. Step 6: After that, you may either upload or complete your returns online.
  7. Step 7: You have the option of adding or uploading invoices.
  8. Step 8: Make sure the form is filled out completely and accurately by rechecking it.
  9. Step 9: Select “Submit.”
  10. Step 10: Click “File GSTR-1” after verifying the information you supplied.
  11. Step 11: Electronically or digitally sign the form.
  12. Step 12: When a pop-up is displayed on your screen, click “Yes” to confirm that you want to file
    a GSTR-1. Watch for the generation of an ARN (Acknowledgement Reference Number).

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How to Revise GSTR-1?

Once GSTR-1 is filed, it cannot be revised directly. However, if you made errors or missed entries in your original GSTR-1, you can correct them in the next month’s GSTR-1 filing. To do this, include the missing invoices or make adjustments for errors in the “Amendments” section of the subsequent GSTR-1. This allows you to update the details of previous tax periods.

Steps to Make Corrections in GSTR-1:

  • Identify the error in the previously filed GSTR-1 return.
  • Go to the upcoming GSTR-1 filing for the current period.
  • Use the “Amendment” sections in the form to update B2B invoices, B2C large invoices, export invoices, or debit/credit notes.
  • Enter the correct information along with original invoice details.
  • Preview and submit your return after making all necessary changes.

Late Fees and Penalty

You will be required to pay a late charge at the following rate if you cannot submit your  GSTR-1  return by the deadline. A yearly interest rate of 18% will also be assessed on the amount of unpaid taxes:

Type of Return

Regular Return

Late Fee per Day

₹50 (₹25 CGST + ₹25 SGST)

Maximum Late Fee

₹10,000 (₹5,000 CGST + ₹5,000 SGST)

Type of Return

Nil Return

Late Fee per Day

₹20 (₹10 CGST + ₹10 SGST)

Maximum Late Fee

₹500 (₹250 CGST + ₹250 SGST)

Note: Even if there are no transactions (Nil Return), timely filing is mandatory to avoid penalties.

Conclusion

After reading this article you may have undesrtood GSTR 1 meaning and In essence, information about
outgoing supplies made during the month must be recorded in the GSTR-1 format as either
invoice-specific, rate-specific, or state-specific information.

Not filing GSTR-1 correctly and on time can harm the reputation of your business as well, as your
Compliance Rating may suffer.

As  input tax credit  depends on the
supplier’s compliance, it will also affect one’s customers. Potential B2B buyers may refrain from
doing business with you if you don’t file your GSTR-1 correctly, due to the problems they will face
when not being able to claim ITC.

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Frequently Asked Questions

Clear answers to common queries about this topic.

What details are reported in GSTR-1?

GSTR-1 includes invoice-level details of all outward supplies such as B2B, B2C sales, credit/debit notes, and exports. It must be filed monthly or quarterly to keep your buyer's ITC records updated.

Can GSTR-1 be revised after filing?

No, GSTR-1 cannot be revised after filing. If any error is made, you can correct it in the return of the next month or quarter. Always check reports thoroughly before submission.
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Madan Murari

Chartered Accountant

Hi there! I’m a Chartered Accountant with over 20 years of experience in financial accounting and a passion for writing. I enjoy simplifying complex topics like GST and income tax, believing that learning should be a lifelong journey. I'm here to share insights and make financial matters easier for everyone!

MRN: 509164 Patna