GST Interest & Late Fee Calculator for Indian Businesses

Understand how GST interest and late fees are calculated and use a ready-to-use Excel calculator to estimate delay costs for GSTR-1, GSTR-3B, tax payment delays, and return filing defaults.

FREE

PDF + EXCEL

Interest & Late Fee Calculator

How interest and late fees are calculated plus an Excel calculator for estimation.

Download Calculator Guide

About the Calculator & Guide Bundle

Delaying GST return filing attracts both a daily late fee and interest under Section 50 on outstanding tax balances. This calculator helps CAs and business owners calculate delay costs instantly.

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GST Interest Guide

Details the Section 50 net cash interest rules — calculate interest only on cash payments at 18% p.a.

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Late Fee Calculator

Provides daily delay fee rates for both nil (₹20/day) and taxable (₹50/day) returns.

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Net Liability Formula

Pre-configured Excel formulas compute the net tax paid in cash to determine the interest base.

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Filing Delay Tracker

Computes total delay days automatically after you input the due date and actual filing date.

Who is this Calculator For?

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MSME Owners

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Accountants

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Tax Professionals

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Finance Managers

Download the Free GST Interest & Late Fee Calculator

Get a practical PDF + Excel bundle to understand GST interest and late fee rules and estimate payable amounts for delayed GST return filing or tax payment.



Frequently Asked Questions

What is GST interest?
Interest is a penalty charged at 18% p.a. under Section 50 for late payment of GST liability. It is calculated daily on the cash portion of the tax paid.
What is GST late fee?
A late fee is a daily charge applied for delayed filing of GSTR-1 or GSTR-3B returns: ₹50/day for regular returns and ₹20/day for Nil returns.
Is this PDF + Excel calculator free?
Yes, it is 100% free to download.