GST Calculator
Exclusive (Add Tax)
Inclusive (Remove Tax)
Custom Rate
Invoice Summary
Net Amount1,000.00
GST Amount (18%)180.00
Total Payable1,180.00
What is Goods and Services Tax (GST)?
GST is a consumption-based tax levied on the supply of goods and services. It is used in over 160 countries under different names (like VAT or Sales Tax). This calculator helps you determine either the net price before tax (Inclusive) or the total price after adding tax (Exclusive).
How to Use This Calculator
- Select Type: Choose "Exclusive" if you want to add tax to a base price. Choose "Inclusive" if you want to find out how much tax is included in the final price.
- Enter Amount: Input the transaction value.
- Select Rate: Choose a preset rate or enter a custom percentage (useful for different countries).
Global Tax Rates Reference
Since this tool allows custom rates, it is perfect for users worldwide. Here are some common standard rates:
| Country | Tax Name | Standard Rate |
|---|---|---|
| Australia | GST | 10% |
| United Kingdom | VAT | 20% |
| Canada | GST | 5% |
| India | GST | 18% |
| Singapore | GST | 9% |
Calculation Formulas
Exclusive (Add Tax):
Total = Amount + (Amount × Rate / 100)
Total = Amount + (Amount × Rate / 100)
Inclusive (Remove Tax):
GST = Amount - [Amount × {100 / (100 + Rate)}]
GST = Amount - [Amount × {100 / (100 + Rate)}]
Frequently Asked Questions (FAQ)
Exclusive GST means the tax is not yet included in the price. It is calculated as a percentage of the value and added on top. (e.g., $100 + 10% Tax = $110).
Inclusive GST means the tax is already part of the final price. You need to "back-calculate" to find the original pre-tax value. (e.g., If Total is $110 with 10% Tax, the original price was $100).
ITC allows businesses to claim credit for the tax they paid on purchases (Inputs) and use it to offset the tax liability on sales (Outputs). This prevents the "cascading effect" of tax on tax.
Yes! The mathematical formula for GST, VAT (Value Added Tax), and Sales Tax is identical. Simply enter your country's specific rate in the "Custom Rate" field.
GST is an indirect tax, meaning it is ultimately paid by the final consumer. However, businesses collect it from customers and remit it to the government.
Disclaimer: Tax rates are subject to change by government authorities. This tool is for estimation purposes only.