GST Late Fee & Interest Calculator (FY 2026-27)
Calculate GSTR-3B and GSTR-1 late filing penalties and 18% interest on delayed GST payment instantly.
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Filing Delayed by 25 Days
Your GSTR-3B return is overdue. Daily late fee of ₹50/day and 18% annual interest are accumulating.
Total Late Fees Due
₹1,250
Capped at maximum of ₹2,000 for this turnover slab.
Section 50 Net Interest
₹185
Charged at 18% p.a. strictly on net cash liability (₹15,000).
Challan Tax & Penalty Outlay
Net Liability Calculation Active
Interest u/s 50 is legally calculated strictly on the net cash liability paid through the electronic cash ledger. The available ITC offset (₹30,000) has been deducted from the interest base to save you unnecessary penalty costs.
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GST Late Fee Rates at a Glance
GSTR-3B (with tax)
₹50/day
Max ₹10,000 · ₹25 CGST + ₹25 SGST
GSTR-3B (nil return)
₹20/day
Max ₹10,000 · ₹10 CGST + ₹10 SGST
Interest on tax due
18% p.a.
No cap · Calculated daily
Frequently Asked Questions
What is the late fee for GSTR-3B?
The late fee for GSTR-3B is ₹50 per day (₹25 CGST + ₹25 SGST) for returns with tax liability, and ₹20 per day (₹10 CGST + ₹10 SGST) for nil returns. Maximum late fee is capped at ₹10,000.
What is the interest rate on delayed GST payment?
Interest on delayed GST payment is charged at 18% per annum on the outstanding tax amount from the due date until the actual date of payment.
What is the late fee for GSTR-1?
The late fee for GSTR-1 is ₹50 per day (₹25 CGST + ₹25 SGST) for returns with outward supplies, and ₹20 per day for nil returns. Maximum is ₹10,000.
Is there a waiver on GST late fees?
The government periodically announces amnesty schemes that waive or reduce late fees. However, interest on delayed tax payment is generally not waived. Always check the latest GST council notifications.
How is GST interest calculated?
GST interest = (Tax Amount × 18% × Number of days delayed) / 365. This calculator uses this formula to give you an instant estimate.
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