GST Late Fee Calculator
Late fee and interest for a GST return filed after the due date
Pick the return and tax period — the due date fills itself in. Get the day count, late fee under Section 47, interest under Section 50, and the CGST/SGST split you need for the cash ledger.
| Head | CGST | SGST / UTGST | Total |
|---|---|---|---|
| Late fee u/s 47 | ₹275 | ₹275 | ₹550 |
| Interest u/s 50 @ 18% | on ₹0 for 11 days | ₹0 | |
| Total to pay in cash | ₹550 | ||
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What is a GST Late Fee Calculator?
Late fee on a GST return is automatic and non-negotiable — the GSTN portal simply will not let you file until it is paid in cash. The hard part is knowing the number before you log in, because cash-flow planning, client billing and notice replies all need a precise figure.
Section 47 charges the fee twice: once under the CGST Act and once under the SGST/UTGST Act. So the familiar "₹50 a day" is really ₹25 + ₹25, and "₹20 a day" for a nil return is ₹10 + ₹10. Every cap works the same way — the ₹5,000 ceiling on a monthly return is ₹5,000 per Act, ₹10,000 in the hand.
This calculator covers GSTR-1, GSTR-3B (monthly and QRMP), GSTR-4, GSTR-7, GSTR-9/9C and GSTR-10. Choose the return and the tax period and it fills in the statutory due date for you, counts the days to your filing date, applies the right rate and cap for a nil return or your turnover slab, and adds interest under Section 50 on any tax paid late.
Why use this GST Late Fee Calculator
Built for Indians, by Indians. Every number, every formula, every slab — tuned to FY 2026-27 reality.
Due dates filled in
Pick the return and period — the 11th, 20th, 22nd/24th QRMP, 30 June or 31 December is applied for you. Override it if a notification extended the date.
Nil vs normal rates
₹10/day per Act for nil returns, ₹25/day for normal, and the full statutory ₹100/day where no relief notification applies.
Every cap enforced
Flat caps by turnover slab for monthly returns, percentage-of-turnover caps for GSTR-9 — so a long delay is never overstated.
Interest included
Adds Section 50 interest at 18% p.a. on tax paid in cash (or 24% on ITC wrongly availed) over the same delay period.
CGST/SGST split
Head-wise table you can post straight into the cash-ledger challan.
Nothing leaves the tab
Runs entirely in your browser. No login, no upload, no turnover data sent anywhere.
Using the GST Late Fee Calculator in 5 steps
No onboarding, no signup. Answer three fields and the numbers update live.
Pick the return and period
GSTR-1, 3B, 4, 7, 9 or 10, monthly or QRMP. The statutory due date appears on its own.
Set the filing date
The date you actually filed, or plan to. The calculator counts the delay in days from the day after the due date.
Mark nil and enter turnover
Nil returns get the lower rate and a ₹250-per-Act cap. Turnover decides which cap slab applies to everything else.
Add the cash tax, if any
Net liability after ITC set-off. Interest at 18% p.a. is added on top of the late fee.
Read the head-wise total
Use the CGST, SGST and interest figures directly in the cash-ledger challan before you file.
Tips to get the most out of it
Late fee and interest are payable only in cash. ITC cannot be used for either, and neither is creditable to your customers — budget the cash before the filing date, not after.
The per-day rate you see quoted is almost always the combined figure. ₹50/day means ₹25 under CGST and ₹25 under SGST; the same doubling applies to every cap in the law.
Caps on GSTR-1 and GSTR-3B follow your aggregate annual turnover: ₹1,000 per Act up to ₹1.5 Cr, ₹2,500 per Act up to ₹5 Cr, ₹5,000 per Act above that.
GSTR-9 is capped as a percentage of turnover, not a flat amount: 0.02% per Act up to ₹20 Cr of turnover, and 0.25% per Act above it. A ₹50 Cr business faces a ₹12.5 L per-Act ceiling — file on time.
For old defaults, check CBIC for an active amnesty before you pay. Past schemes have capped nil-return fees at a few hundred rupees per return, and there is no refund once the fee is debited.
Late fee and interest answer two different questions. The fee is for filing the return late; interest is for paying the tax late. A return filed on time with tax paid late still attracts interest, and vice versa.
Real-world scenarios
How Indians actually use this calculator — concrete inputs, concrete outcomes.
GSTR-3B for July, filed 30 days late
Turnover ₹2 Cr, due 20 August, filed 19 September. 30 × ₹25 = ₹750 under each Act — ₹1,500 in total, well under the ₹2,500-per-Act cap. With ₹2 L of cash tax, interest adds ₹2,959, so ₹4,459 must sit in the cash ledger before the return will file.
Nil GSTR-1, four months late
₹10 per day per Act, but the cap is ₹250 per Act. Anything past 25 days of delay stops at ₹500 in total — small, but the portal still blocks the next period until it is paid.
GSTR-9 for a ₹5 Cr business, 60 days late
Turnover up to ₹5 Cr means ₹25 per day per Act, capped at 0.02% of turnover. 60 × ₹25 = ₹1,500 per Act, or ₹3,000 combined — far below the ₹1,00,000-per-Act ceiling, so the day count governs.
Frequently Asked Questions
Still have a question? Our team replies within a business day.
Both, depending on how you count. Section 47 charges ₹25 per day under the CGST Act and another ₹25 under the SGST/UTGST Act, so ₹50 a day leaves your bank account. This calculator shows the per-Act figure and the combined total side by side.
GSTR-1 is the 11th of the following month (13th if you are on QRMP), GSTR-3B the 20th (22nd or 24th for QRMP, depending on your state group), GSTR-7 the 10th, GSTR-4 the 30th of June after the financial year, GSTR-9 the 31st of December, and GSTR-10 three months from cancellation. The calculator applies these, and the due date stays editable if a notification extended it.
Only by a CBIC notification — an officer cannot waive it case by case. Amnesty schemes appear periodically and have historically capped nil-return fees at a few hundred rupees, so check for an active one before paying an old default.
No. Late fee, interest and penalty are all cash-ledger items. Credit in your electronic credit ledger cannot be used for any of them.
No. Late fee is for filing the return after the due date and is a fixed amount per day. Interest under Section 50 is for paying the tax late, runs at 18% a year on the cash portion of the liability, and is charged on top. Both can apply to the same return.
No — those are auto-drafted statements you read, not returns you file. Late fee attaches only to returns you furnish: GSTR-1, 3B, 4, 5, 6, 7, 8, 9, 9C and 10.
The fee keeps running until the cap, the portal blocks every later period, your buyers lose the ITC on your invoices, and the department can issue a Section 62 best-judgement assessment. Filing late is always cheaper than not filing.
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