GST Interest Calculator
Calculate interest on late GST payments. Our tool helps you estimate the interest owed based on your overdue tax amount and delay period. Plan ahead.
GST Interest Calculator for Late Payments
GST Interest Calculator for Late Payments
Estimate the interest payable on your late GST payments with our accurate calculator.
Why Use Our GST Interest Calculator?
The most accurate tool for calculating interest on late GST payments
Precise Interest Calculations
Our calculator uses the exact formula recognized by tax authorities: Interest = (Tax Amount × Annual Interest Rate × Days Delayed) ÷ 365. This ensures mathematical accuracy for all interest calculations across different countries and tax rates.
Multi-Country Support
Calculate interest on late GST payments for India (18%), Australia (10%), New Zealand (7%), Canada (6%), and Singapore (5%). Each country's specific interest rate is properly supported.
Instant Results
See immediate results showing the days delayed, interest payable, and total amount due. Perfect for understanding exactly how much interest is accruing on your late GST payments.
Business & Consumer Friendly
Whether you're doing accounting, preparing tax returns, or simply want to understand your interest liability, our GST interest calculator provides clear, professional results every time.
How to Use the GST Interest Calculator
Follow these simple steps to calculate interest on late GST payments
Choose Your Country
Select your country from the dropdown to automatically set the correct interest rate. Supports India, Australia, New Zealand, Canada, and Singapore.
Enter Tax Amount Due
Input the GST amount that was not paid by the due date. This is the base amount on which interest will be calculated.
Verify Annual Interest Rate
The interest rate is automatically set based on your country, but you can adjust it manually if your jurisdiction applies a different rate.
Select Due Date and Payment Date
Choose the original due date for your GST payment and the actual date of payment (or expected payment date).
Get Instant Results
Click 'Calculate Interest' to see the days delayed, interest payable, and total amount due.
GST Interest Calculation Formula
Understanding the mathematical formula behind GST interest calculations
Calculate Days Delayed
The number of days between the due date and the actual payment date.
Days Delayed = Payment Date - Due Date Example: If due date is January 1 and payment date is February 15, days delayed = 45 days
Calculate Interest Amount
This formula calculates the simple interest on the unpaid tax amount.
Interest = (Tax Amount × Annual Interest Rate × Days Delayed) ÷ 365 Example: If tax amount is $5,000, interest rate is 18%, and days delayed is 45: Interest = (5000 × 0.18 × 45) ÷ 365 = $110.96
Calculate Total Amount Due
The total amount payable, including both the original tax and the accrued interest.
Total Amount Due = Tax Amount + Interest Example: Total Amount Due = $5,000 + $110.96 = $5,110.96
GST Interest Calculator FAQ
Common questions about calculating interest on late GST payments
Interest on late GST payments is calculated using the formula: (Tax Amount × Annual Interest Rate × Days Delayed) ÷ 365. This simple interest calculation applies from the day after the due date until the date of payment.
Interest rates vary by country. For example, in India, the rate is 18% per annum, while Australia applies approximately 10%. Our calculator allows you to select your country for the default rate or enter a custom rate.
Yes, GST interest is typically calculated on a daily basis. Even a one-day delay can result in interest charges, though the amount may be minimal for short delays.
Yes, this calculator can be used for estimating interest on late GST payments for both businesses and individuals. The calculation method is the same regardless of the taxpayer type.
In most jurisdictions, interest paid on late GST payments is not tax-deductible as it is considered a penalty for non-compliance rather than a normal business expense. However, tax laws vary by country, so consult with a tax professional for advice specific to your situation.
Disclaimer
This GST interest calculator is provided for informational purposes only. While we strive for accuracy: • Interest rates may change - always verify current rates with official sources • Consult tax professionals for complex calculations or business decisions • Different jurisdictions may have different interest calculation methods • This tool does not constitute professional tax advice • Results should be verified for critical business decisions