Do I need to file GST returns if I had no sales?

Yes. A registered taxpayer must file returns for every period, even with no business. Nil returns can be filed online or by SMS.

What is the difference between GSTR-1 and GSTR-3B?

GSTR-1 lists your sales invoice by invoice and feeds your buyers' GSTR-2B. GSTR-3B is a summary return in which you report sales, claim input tax credit and pay the tax due.

It has been optional for businesses with aggregate turnover up to ₹2 crore and mandatory above that. Composition taxpayers file GSTR-4 instead.

What is the interest rate on late GST payment?

18% a year on the tax paid late, generally on the portion paid in cash, for the number of days of delay.

What happens if I do not file GST returns for months?

Late fees and interest build up, e-way bills get blocked after two missed GSTR-3B periods, and registration can be cancelled after six months of non-filing. Returns also become time-barred three years after their due date.

GST returns and due dates

Updated 11 October 2026

A regular GST-registered business files two main returns: GSTR-1, listing its sales, and GSTR-3B, a summary return in which it pays the tax. Both are monthly, or quarterly for small businesses under the QRMP scheme. On top of these comes the annual GSTR-9. You must file even in months with no sales.

The main GST returns

Return	What it contains	Who files	Usual due date
GSTR-1	Invoice-wise details of sales	Regular taxpayers	11th of next month (monthly) or 13th of the month after the quarter (QRMP)
IFF	Optional upload of B2B invoices for the first two months of a quarter	QRMP taxpayers	13th of next month
GSTR-3B	Summary of sales, input tax credit and tax paid	Regular taxpayers	20th of next month (monthly) or 22nd or 24th of the month after the quarter, depending on the state (QRMP)
CMP-08	Statement and payment of tax	Composition taxpayers	18th of the month after each quarter
GSTR-4	Annual return	Composition taxpayers	30 June after the financial year
GSTR-9	Annual return	Regular taxpayers (optional up to ₹2 crore turnover)	31 December after the financial year
GSTR-9C	Reconciliation statement	Turnover above ₹5 crore	With GSTR-9
GSTR-7 and GSTR-8	TDS and TCS deducted under GST	Notified deductors and e-commerce operators	10th of next month

Due dates are sometimes extended by government notification, especially around portal problems or natural disasters. Always check the current dates on gst.gov.in.

Monthly filing or the QRMP scheme

Businesses with aggregate turnover up to ₹5 crore can opt for QRMP (Quarterly Return Monthly Payment). They file GSTR-1 and GSTR-3B once a quarter, but still pay tax every month:

for the first two months of a quarter, tax is paid through challan PMT-06 by the 25th of the next month, either as a fixed amount based on past returns or on actual figures;
the optional IFF lets them upload B2B invoices monthly, so their business buyers get credit without waiting for the quarter to end.

Larger businesses file monthly.

GSTR-2B and the Invoice Management System

GSTR-2B is not a return you file. It is an auto-drafted statement of your purchases, built from what your suppliers report in their GSTR-1. Your input tax credit in GSTR-3B should match it. Since October 2024, the Invoice Management System (IMS) lets you accept, reject or keep pending each supplier invoice before GSTR-2B is generated.

The portal now auto-fills much of GSTR-3B from GSTR-1 and GSTR-2B and restricts editing of some auto-filled values. Mistakes in sales figures are best corrected in GSTR-1 or the amendment form GSTR-1A before you file GSTR-3B.

Annual returns: GSTR-9 and GSTR-9C

GSTR-9 summarises the whole year's sales, purchases, credit and tax. It has been optional for businesses with aggregate turnover up to ₹2 crore. Businesses with turnover above ₹5 crore also file GSTR-9C, a self-certified reconciliation between the GST returns and the audited accounts. The due date is 31 December after the year ends: for FY 2025-26, that is 31 December 2026.

Late fees and interest

Late fee: ₹50 a day (₹25 CGST + ₹25 SGST) for GSTR-1 and GSTR-3B, and ₹20 a day for nil returns, subject to caps that are lower for nil returns and smaller businesses.
Interest: 18% a year on tax paid late, calculated on the part paid in cash.
Knock-on effects: you cannot file GSTR-3B before filing GSTR-1, and if GSTR-3B is pending for two tax periods, e-way bill generation is blocked.

Worked example. A monthly filer's GSTR-3B for August 2026 was due on 20 September 2026 but was filed on 2 October 2026, 12 days late, with ₹40,000 paid in cash.

Late fee: ₹50 × 12 days = ₹600 (₹300 CGST + ₹300 SGST)
Interest: ₹40,000 × 18% × 12 ÷ 365 = ₹236.71, about ₹237
Total extra cost: about ₹837

The three-year limit

An amendment made by the Finance Act, 2023 bars filing GSTR-1, GSTR-3B, GSTR-9 and certain other returns more than three years after their due date, and the portal has started enforcing it. Old pending returns cannot simply be filed later, so do not let them pile up.

A regular taxpayer who does not file returns for six months in a row also risks cancellation of registration.

Recent and proposed changes

The 57th GST Council meeting on 8 October 2026 recommended, among other things, a late fee waiver for businesses with turnover up to ₹5 crore that file within the month of the due date, a mechanism to align GSTR-3B with GSTR-1 data from the April 2027 return period, and an optional scheme with quarterly payment and a single annual return for small businesses that sell only to consumers. These are recommendations. They apply only once the law, rules and notifications are issued.

Practical filing tips

File GSTR-1 on time, since your buyers' credit depends on it.
Reconcile your purchase register with GSTR-2B and act on IMS before filing GSTR-3B.
Nil GSTR-1 and GSTR-3B returns can be filed by SMS from the registered mobile number.
Keep a calendar for the 11th, 13th, 18th, 20th and 25th, depending on your scheme.

Check tax amounts before filing with our GST calculator.