Interest & Late Fees Under GST
Section 50 | Rule 88B — Interest on late GST payment decoded. All four scenarios: R 88B(1), Proviso 88B(1), 88B(2), 88B(3). Plus complete Late Fees structure and a full worked calculation example with GSTR-3B June 2025.
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Part A — Interest Under GST: Section 50 & Rule 88B
When GST is paid after the due date, interest is levied under Section 50 of the CGST Act. Rule 88B introduced in 2021 refined how interest is calculated — specifically protecting taxpayers who had cash available in their Electronic Cash Ledger before the due date.
Rule 88B has four scenarios. Each applies to a different situation:
Exception: If Sec 73/74/74A proceedings are ongoing — interest on full amount.
📌 Interest Rates Summary
- Normal Late Payment (88B(1) / 88B(2)): 18% per annum
- Wrong ITC Used (88B(3)): 24% per annum
- Calculated on Net Cash Liability (not gross tax) under 88B(1)
Interest Calculation — Full Worked Example
The note shows a complete real-world calculation. Let’s walk through it step by step:
Amount in Cash Ledger before due date (24.07.2025): ₹20,000 — deposited on 20.07.2025 ✔
Balance ₹30,000 deposited on filing date 13.08.2025
Rule 88B(1): Only cash portion not deposited before due date attracts interest
Rate of Interest: 18% p.a.
= ₹30,000 × 0.18 × 20 ÷ 365
✔ Why Only ₹30,000? — Proviso 88B(1) Explained
The taxpayer had deposited ₹20,000 in the Electronic Cash Ledger on 20.07.2025 — before the due date of 24.07.2025. Per Proviso to Rule 88B(1), no interest is payable on this ₹20,000 even though the return was filed late. Interest is only on the ₹30,000 which was deposited after the due date (on the filing date itself).
Part B — Late Fees Under GST
Late fees are separate from interest. Interest is on tax not paid; Late fees are on return not filed. Both can apply simultaneously if you are late in filing and have outstanding tax.
| Return Filer Type | IGST (Total) | CGST | SGST/UTGST |
|---|---|---|---|
| Normal Return Filer | ₹50/day | ₹25/day | ₹25/day |
| NIL Return Filer (Total liability = NIL) |
₹20/day | ₹10/day | ₹10/day |
📌 Late Fee Formula
Late Fee = No. of Days Delay × ₹25 (CGST) + ₹25 (SGST)
For NIL return filers: No. of Days Delay × ₹10 (CGST) + ₹10 (SGST)
IGST is the combined total = CGST + SGST portions
Applies From
Late fee starts from the day after the due date and runs until the actual date of filing. No grace period.
Separate from Interest
Late fees and interest are two independent levies. You can have late fees even with no tax liability (NIL return). You can have interest even without late fees if you pay tax before filing.
Paid via Cash Ledger
Both late fees and interest must be paid from the Electronic Cash Ledger only. ITC cannot be used to pay late fees or interest — ever.
Amnesty Schemes
The government periodically announces late fee waiver schemes (amnesty) for taxpayers with pending returns. Always check CBIC notifications for active waivers.
Day 25 — Key Takeaways
📌 Interest vs Late Fees — Quick Recall
- Interest (Sec 50 / Rule 88B): On tax paid late. 18% normal, 24% for wrong ITC. Only on Net Cash Liability under 88B(1).
- Proviso 88B(1): Cash deposited in ledger before due date → No interest on that amount even if return is late.
- Late Fees: On return filed late. Normal: ₹50/day (IGST) = ₹25 CG + ₹25 SG. NIL filer: ₹20/day = ₹10 + ₹10.
- Formula: Interest = Amount × 18% × Delay Days ÷ 365
- Both must be paid via Electronic Cash Ledger only — ITC cannot be used.
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