🧾 GST Penalty Calculator – Calculate GST Late Payment & Interest Online

The GST Penalty Calculator is a free online tool that helps taxpayers quickly estimate interest and penalty on delayed GST payments or returns. Whether you missed filing your GSTR-3B, delayed tax payment, or want to check interest on outstanding dues, this calculator provides an instant, accurate estimate.

In this guide, you’ll learn how to calculate GST penalty, how interest is charged, and how to use our calculator effectively.

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💡 What Is GST Penalty?

Under India’s Goods and Services Tax (GST) law, penalties are imposed when a registered taxpayer fails to comply with the rules — such as late return filing, short payment, non-payment, or wrong input tax credit claim.
The penalty for late filing of GST return 3B or delayed tax payment usually includes interest (for delay) and late fees or penalty (for non-compliance).

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⚙️ How to Calculate GST Penalty

To understand how to calculate penalty in GST, you need to know the two key components:

1. Interest:
   • 18% per annum on the tax amount not paid or paid late.
   • Formula:
     Interest = (Tax Amount × 18 × Number of Days Delay) ÷ 36500
2. Penalty:
   • For normal taxpayers, 10% of tax due (minimum ₹10,000).
   • For fraud or evasion cases, 100% of tax due (minimum ₹10,000).

For example:
If you delayed ₹50,000 GST payment by 30 days:

• Interest = (50,000 × 18 × 30) ÷ 36500 = ₹739.
• Penalty = ₹5,000 (10% of ₹50,000).
  Total payable: ₹55,739.

Our online GST penalty calculator does this math instantly for you.

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🧮 How to Use GST Penalty Calculator Online

1. Enter the tax amount you owe.
2. Add the number of days delayed in payment or filing.
3. Input the interest rate (default 18%).
4. Choose penalty type – percentage or fixed amount.
5. Click Calculate to get:
   • Interest amount
   • Penalty amount
   • Total payable

You can also use this tool as a:

• GST late payment penalty calculator
• GST late filing penalty calculator
• GST interest and penalty calculator
• GST nil return penalty calculator

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📘 Formula for GST Interest and Penalty Calculation

Formula for Interest:
Interest = Tax Amount × Interest Rate × (Days Delay / 365)

Formula for Penalty:

• Normal case → 10% of tax
• Fraud case → 100% of tax
• Nil return → ₹20 per day (₹10 CGST + ₹10 SGST)

These formulas are pre-built into our GST penalty and interest calculator, so you just enter your numbers to get the results.

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💻 Benefits of Using GST Penalty Calculator Online

✅ Instant Results: No manual math or Excel sheets needed.
✅ Accurate Calculations: Based on official GST interest and penalty formulas.
✅ Customizable Rates: Adjust interest or penalty percentage as per case.
✅ Free & Easy: Works on desktop and mobile instantly.
✅ Useful for: Accountants, business owners, tax consultants, and freelancers.

You can even use it as a GST penalty calculator in Excel alternative — our tool is faster, cleaner, and more intuitive.

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🧾 GST Late Return Penalty and Interest

If you file your GSTR-3B or GSTR-1 after the due date:

• Late Fees: ₹50 per day (₹25 CGST + ₹25 SGST)
• Nil Return: ₹20 per day (₹10 CGST + ₹10 SGST)
• Interest: 18% per annum on outstanding tax

Our GST return penalty calculator helps you compute this automatically.
You can also estimate GST penalty for nil return, composition scheme, or multi-month delay.

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🧩 GST Composition Scheme Penalty

Businesses under the composition scheme face a different structure:

• Penalty = 10% of tax due or ₹10,000, whichever is higher.
  Our GST penalty calculator for composition scheme helps you determine the exact value in seconds.

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🕐 How to Calculate GST Interest and Penalty Manually

If you want to calculate without a tool, follow these steps:

1. Multiply the tax amount with 18%.
2. Divide by 365 and multiply by the number of late days.
3. Add penalty based on rule (10% or 100%).
4. Sum up tax + interest + penalty for total payable.

However, the auto calculation of GST penalty using our tool saves time and reduces human error.

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⚡ Why Use Our GST Penalty Calculator?

• 100% browser-based – no login or download required.
• Provides clear interest + penalty breakdown.
• Suitable for India GST penalty across all states.
• Works better than manual or GST penalty calculator Excel sheets.
• Trusted by students, accountants, and small businesses.

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🔍 Common Questions

Q1. Does the GST portal calculate penalty on its own?
➡️ The GST portal shows late fees and interest but doesn’t auto-calculate penalty. Use our calculator to get a complete estimate.

Q2. What is the penalty for late filing of GST return 3B?
➡️ ₹50 per day for normal return, ₹20 for nil return, plus 18% interest on outstanding tax.

Q3. Can I calculate GST penalty for previous months?
➡️ Yes, just change the number of late days — our calculator supports multi-month delay calculation.

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🏁 Conclusion

The GST Penalty Calculator online helps you calculate GST interest and penalty accurately for any delay, whether it’s filing GSTR-3B, late tax payment, or nil return.
It’s an easy-to-use and free solution for every Indian taxpayer to stay compliant and avoid unnecessary fines.