FinTech Glossary

What is GSTR-1

GSTR-1 is the statement through which a registered taxpayer reports outward supplies of goods or services for a tax period. It records sales invoices, exports, debit and credit notes, taxable supplies to registered and unregistered customers, and other prescribed transaction details. The information reported by suppliers also feeds GST records available to recipients and supports the tax liability reported through GSTR-3B.

For businesses handling regular GST compliance, accurate GSTR1 filing requires the sales register, invoices and adjustment documents to agree before the statement is submitted. A business does not use GSTR-1 to pay GST. The statement reports outward-supply information, while the corresponding tax liability is discharged through GSTR-3B.

The term R1 in GST is commonly used informally for GSTR-1. The GSTR1 details reported by a supplier can affect the information made available to its customers for input tax credit review, which makes correct GSTINs, invoice numbers, taxable values and tax amounts particularly important.

What is the GSTR 1 Format

The GSTR1 format separates outward supplies according to the type of customer, transaction and tax treatment. The current form also contains dedicated reporting for supplies made through e-commerce operators.

GST Return Tables and Information Reported

For B2C Large reporting, the GST offline utility currently classifies an inter-state supply to an unregistered customer as B2CL when the invoice value exceeds ₹1 lakh. This threshold applies from the August 2024 tax period; the earlier threshold was ₹2.5 lakh.
Tables 14 and 15 became operational from the January 2024 tax period, while amendment Tables 14A and 15A became available from February 2024.

Eligibility for Filing GSTR-1

Monthly filing is the standard route for regular taxpayers. A registered person with PAN-based aggregate annual turnover of up to ₹5 crore may opt for the Quarterly Return Monthly Payment scheme, subject to the applicable conditions.

Under QRMP, GSTR-1 is filed once for the quarter. Tax is still dealt with through the monthly payment mechanism prescribed for the scheme.

Quarterly filers may also use the Invoice Furnishing Facility during the first two months of a quarter. IFF allows eligible B2B invoices and specified related documents to reach recipients earlier instead of waiting for the quarterly GSTR-1. Using IFF is optional.

Documents Required for Filing GSTR-1

Preparation should begin with the sales records for the relevant period. The supporting set will depend on the transactions carried out by the business.

Common records include:

• Sales register for the month or quarter
• Tax invoices and revised invoices
• Debit notes and credit notes
• Details of canceled documents
• Advance receipts and adjustments where GST reporting is required
• Export invoices and shipping-related information
• SEZ supply documents
• Customer GSTIN and place-of-supply information
• HSN-wise sales information
• E-invoice data for taxpayers covered by e-invoicing
• Records relating to supplies through e-commerce operators, where applicable

Before filing, invoice numbers, taxable values, GST rates and customer GSTINs should be checked against the accounting records. Incorrect supplier reporting can create reconciliation problems for both sides of the transaction.

GSTR-1 Due Date

The GSTR1 due date depends on whether the taxpayer files monthly or under QRMP.

GSTR-1 Filing Due Dates

For example, a monthly GSTR-1 for July would normally be due on 11 August. A quarterly GSTR-1 for April to June would normally be due on 13 July. The government may extend a deadline for specified taxpayers or periods through a notification.

Who Should File GSTR 1

Section 37 generally requires regular registered persons making outward supplies to furnish GSTR-1. This includes eligible monthly filers and businesses that have opted for quarterly filing under QRMP.

The statutory framework excludes certain taxpayers who use separate GST forms, including:

• Composition taxpayers
• Input Service Distributors
• Non-resident taxable persons
• Persons required to deduct GST under Section 51
• Persons required to collect GST under Section 52

These categories follow the return or statement applicable to their registration type.

A regular taxpayer generally needs to furnish the statement even when there are no outward supplies for the period. In such a case, a nil GSTR-1 is filed.

How to Revise GSTR-1

A filed GSTR-1 cannot simply be reopened and replaced with a revised return. The correction method depends on when the error is noticed.

For the same tax period, Form GSTR-1A provides a current-period correction route. After GSTR-1 has been filed, a taxpayer can use GSTR-1A to add a missed supply or amend a record before filing GSTR-3B for that period.

GSTR-1A is optional. For monthly taxpayers it becomes available from the later of the GSTR-1 due date or the actual filing date and remains available until GSTR-3B is filed.

Errors relating to earlier periods can continue to be corrected through the relevant amendment tables in a subsequent GSTR-1.

How to Revise GSTR-1

Corrections relating to a previous financial year cannot be postponed indefinitely. The GST portal implemented the statutory change that allows amendment of earlier GSTR-1 records up to 30 November of the following financial year, subject to the applicable legal conditions.

For example, an eligible error relating to FY 2025-26 would ordinarily need correction within the permitted amendment window ending in the following financial year.

For a current-period error, GSTR-1A offers a much earlier correction opportunity because the taxpayer can amend the record before filing the corresponding GSTR-3B.

GSTR-1 Late Fee and Penalty

Missing the filing deadline attracts a GSTR1 late fee. The reduced rate applicable to delayed GSTR-1 is ₹20 per day for a nil statement, split equally between CGST and SGST or UTGST, and ₹50 per day for other GSTR-1 filings. The GST Council records confirm these reduced daily rates.

The government has also capped the late fee for tax periods from June 2021 onwards according to turnover and filing status.

Maximum Combined Late Fee for GSTR-1

For delayed GSTR-1 filings, the maximum central tax late fee is ₹250 for nil returns, ₹1,000 for taxpayers with turnover up to ₹1.5 crore, and ₹2,500 for taxpayers with turnover above ₹1.5 crore and up to ₹5 crore. The same limits apply separately under the corresponding state or union territory tax.

Timely and accurate GSTR-1 filing therefore affects far more than the filing calendar. It keeps outward-supply records aligned with the books, supports customer invoice visibility and gives the business a cleaner base for preparing its own GSTR-3B.