GST late fees and interest, explained simply — with a free calculator
The meter is simple: ₹50 per day per late return (₹20 for nil), with a turnover-based cap — plus 18% a year on any tax you haven't paid.
Late-fee anxiety is mostly fear of the unknown. Here are the actual numbers, so you can calculate yours and get back to business.
The two separate charges
1. Late fee (Section 47) — for filing late
| Situation | Per day | Cap per return | |---|---|---| | Nil return | ₹20 (₹10 CGST + ₹10 SGST) | ₹500 | | Turnover up to ₹1.5 crore | ₹50 (₹25 + ₹25) | ₹2,000 | | Turnover ₹1.5–5 crore | ₹50 | ₹5,000 | | Turnover above ₹5 crore | ₹50 | ₹10,000 |
(Caps per CBIC notifications 19-20/2021 onward; each of GSTR-1 and GSTR-3B is charged separately.)
2. Interest (Section 50) — for paying tax late
18% per annum, day-wise, on tax paid in cash after the due date:
Interest = tax × 18% × days late ÷ 365
Crucially, interest applies to the net cash liability — the portion you pay through ITC doesn't accrue interest (another reason to keep your ITC unblocked and your 2B reconciled).
Worked examples
Example 1 — the forgotten nil month. Kavita's boutique had no sales in April; she remembers the GSTR-3B on 20 July, 61 days late. Late fee: 61 × ₹20 = ₹1,220 → capped at ₹500. Interest: none (no tax due).
Example 2 — a real liability, 25 days late. Arjun (turnover ₹80 lakh) files June's 3B on 14 August instead of 20 July, with ₹40,000 payable in cash. Late fee: 25 × ₹50 = ₹1,250. Interest: ₹40,000 × 18% × 25/365 ≈ ₹493. Total ≈ ₹1,743 — annoying, survivable.
Example 3 — the slow bleed. A distributor files 3B 45 days late every month with ₹2,00,000 cash liability. Each month: ₹2,250 late fee (capped) + ₹4,438 interest ≈ ₹6,700 — ₹80,000+ a year donated to the exchequer for no reason but disorganisation.
The hidden costs beyond the fee
- Late GSTR-1 blocks your buyers' ITC — B2B customers notice whose invoices never reach their 2B, and they buy elsewhere. (It's exactly what we teach buyers to do in the supplier escalation guide.)
- Sequential filing: you can't file a period's 3B with earlier ones outstanding; one skipped month snowballs.
- E-way bill blocking kicks in after two unfiled periods — your trucks stop.
- Chronic lateness raises your profile for scrutiny generally.
Staying on the right side, effortlessly
The due dates are a rhythm: GSTR-1 by the 11th, GSTR-3B by the 20th (or the QRMP variants for quarterly filers). The businesses that never pay late fees aren't more disciplined — they've made filing someone's job with a checklist: bills captured through the month, 2B reconciled on the 14th, IMS actioned, CA handed a ready bundle by the 16th.
That bundle is literally what GST Sathe's CA Report is — and the deadline reminders come built in. Try the late fee calculator to see what lateness is costing you now.
Sources
- Section 47 (late fee) & Section 50 (interest), CGST Act
- CBIC Notifications 19/2021 & 20/2021-Central Tax (late-fee caps by turnover)
- GSTN advisories on sequential filing and e-way bill blocking
Frequently asked questions
Is the late fee charged for both GSTR-1 and GSTR-3B?+
Yes, each late return attracts its own late fee at the same daily rates and caps. Filing GSTR-1 late also delays your buyers' ITC, which costs you goodwill on top of money.
Is interest charged on the late fee too?+
No. Interest (18% p.a.) applies only to unpaid tax paid in cash, calculated day-wise from the due date to the payment date. The late fee is a flat daily amount.
Do I pay a late fee if I had no sales (nil return)?+
Yes — ₹20 per day (₹10 + ₹10), capped at ₹500 per return. A nil return you forget for three months still costs ₹500.
Can late fees be waived?+
Periodic amnesty schemes have reduced or capped accumulated late fees for past periods. They're announced by notification — your CA or our blog will flag them — but banking on amnesty is not a strategy.
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