GSTR-1 is a return that records every sale you made during the month or quarter. GSTR-3B is a summary return where you declare your total tax liability and pay it. A business registered under the Goods and Services Tax (GST) must file both returns. One reports what was sold to the government, while the other is used to declare and pay the tax due. Mixing up their purpose or filing one without the other can create compliance issues for both the business and its buyers.
GSTR-1 vs GSTR-3B: Side-by-side comparison
|
Basis |
GSTR-1 |
GSTR-3B |
|
Purpose |
Reports all outward supplies and invoice-level sales details |
Reports tax liability, ITC claims and tax payment summary |
|
Nature of return |
Detailed statement of transactions |
Self-assessed summary return |
|
Focus |
Disclosure of sales transactions |
Tax computation and payment |
|
Level of reporting |
Invoice-wise reporting |
Aggregate-level reporting |
|
Includes |
B2B invoices, B2C invoices (above ₹2.5 lakh inter-state), exports, debit notes, credit notes, advances and amendments |
Total taxable turnover, CGST, SGST, IGST liability, ITC claimed and net tax payable |
|
Special transactions covered |
Nil-rated, exempt and non-GST supplies |
Reverse charge liability, ITC reversals, interest and late fees |
|
Input tax credit (ITC) impact |
Enables buyers to view invoices in GSTR-2B and claim ITC |
Used by taxpayers to claim eligible ITC |
|
Invoice visibility |
Contains individual invoice details |
Does not contain invoice-wise information |
|
Tax payment required |
No, it is a disclosure-only return |
Yes, net GST liability must be paid while filing |
|
Effect of non-filing |
Buyers may be unable to claim ITC on related invoices |
Tax liability remains unpaid and interest continues to accrue |
|
Primary objective |
Inform the GST system about outward supplies made during the period |
Declare tax liability, adjust ITC and discharge GST dues |
When are GSTR-1 and GSTR-3B due?
Filing frequency depends on your annual turnover. The table below shows the standard due dates. The GST portal may announce extensions for specific months, so always check the portal for any notifications before filing.
|
Return |
Frequency |
Standard due date |
|
GSTR-1 (turnover up to ₹5 crore) |
Quarterly (QRMP scheme) |
13th of the month following the quarter |
|
GSTR-1 (turnover above ₹5 crore) |
Monthly |
11th of the following month |
|
GSTR-3B (turnover up to ₹5 crore) |
Quarterly (QRMP) or monthly (opt-out) |
22nd or 24th of the month following the quarter, depending on the state |
|
GSTR-3B (turnover above ₹5 crore) |
Monthly |
20th of the following month |
Why should GSTR-1 be filed before GSTR-3B?
GSTR-1 and GSTR-3B are connected but serve different purposes in the compliance chain. GSTR-1 feeds the invoice data that populates GSTR-2B for your buyers. GSTR-3B is how you settle the tax liability with the government. File GSTR-1 first so your buyers get timely ITC, then file GSTR-3B to pay what is owed.
Note: A mismatch between the two returns, where GSTR-3B shows a lower liability than what your GSTR-1 invoices add up to, can trigger a notice from the GST department.
How can errors be corrected in GSTR-1 and GSTR-3B?
GSTR-1 allows amendments. If you reported an incorrect invoice, you can correct it in a subsequent month's GSTR-1 through the amendment tables. GSTR-3B does not have a formal amendment mechanism. Errors in GSTR-3B are corrected by adjusting the liability or ITC claim in the next month's GSTR-3B, along with any interest due.
Amendments to GSTR-1 from a previous financial year (FY) must be only up to November 30 of the following financial year or before filing the annual return for that year, whichever is earlier. Missing this window means the correction cannot be made through the return system.
What happens if GSTR-1 or GSTR-3B is filed late?
Late filing of either return attracts fees under Section 47 of the CGST Act, 2017. In the case of GSTR-3B, any delay in filing can also trigger interest on the outstanding tax amount. The interest is calculated at 18% per year from the return due date until the tax is fully paid. For GSTR-1, there is no tax to pay, so only the late fee applies, but the delay still blocks ITC for your buyers until the return is filed.
If GSTR-3B is not filed for two consecutive months (or one quarter under QRMP), the GST portal may block the business's e-way bill generation. This effectively stops all taxable movement of goods.
Conclusion
GSTR-1 and GSTR-3B are not interchangeable. One records what you sold, while the other settles the tax liability with the government. Filing both accurately and in the correct sequence, with GSTR-1 filed before GSTR-3B and before the applicable deadlines, forms the foundation of GST compliance. Keeping your books aligned with your GST returns is much easier when your accounting software links invoices directly to return data.
TallyPrime does this automatically, pulling invoice data from your books into the GST return forms so you are not reconciling two sets of records manually.
