A monthly self-assessed summary GST return for tax payment
GSTR-3B is a simplified, self-assessed monthly summary return that every GST-registered business in India must file to declare their tax liability and pay the GST due for that month. Unlike GSTR-1 which requires invoice-level details, GSTR-3B is a consolidated return that summarises total outward supplies, inward supplies liable to reverse charge, input tax credit claimed, and the net tax payable. The due date is generally the 20th of the following month for monthly filers, though dates vary for quarterly filers under the QRMP scheme. GSTR-3B is where the actual tax payment happens. The return requires you to report your total sales, exempt sales, and the GST collected, then offset it against the input tax credit available from purchases. Any remaining tax liability must be paid before filing. Late filing of GSTR-3B attracts a penalty of Rs. 50 per day (Rs. 20 for nil returns) plus 18% annual interest on unpaid tax. Accurate stock records are essential for correctly calculating the input tax credit claimed in GSTR-3B.
A hardware store in Indore reports the following in its January GSTR-3B: Total outward supplies = Rs. 8,00,000 with GST collected = Rs. 1,44,000 (at 18%). Inward supplies (purchases) = Rs. 5,00,000 with input tax credit (ITC) available = Rs. 90,000. Net GST payable = Rs. 1,44,000 - Rs. 90,000 = Rs. 54,000. The owner must pay Rs. 54,000 and file GSTR-3B by 20th February to avoid penalties. The ITC of Rs. 90,000 is verified against supplier filings in GSTR-2B.
GSTR-1 is a detailed return with invoice-level information about all your outward supplies (sales), while GSTR-3B is a summary return where you report consolidated totals and actually pay the tax. Both must be filed, but GSTR-3B is where the tax payment happens. GSTR-1 data helps your buyers claim ITC, while GSTR-3B settles your own tax liability.
No, once GSTR-3B is filed, it cannot be revised. If you discover errors after filing, you must adjust them in the next month's GSTR-3B return. This is why it is important to verify all figures carefully — especially ITC claims — before submitting.
Late filing attracts a penalty of Rs. 50 per day (Rs. 20 per day for nil returns), capped at Rs. 10,000 per return period. Additionally, 18% annual interest is charged on any unpaid tax from the due date until the date of payment. Continuous non-filing can also lead to cancellation of your GST registration.
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