GST Inclusive Calculator
Understanding Your Results
Base Amount
The price before GST was added. This is the true cost of the goods or services. Use this for cost analysis, profit calculations, and expense tracking. This is what you report as the net amount in your accounting records.
GST Amount
The tax component included in the total. This is what was paid to the supplier as GST. Report this in your GST return as input tax credit. Keep accurate records for compliance and audit purposes.
Total Amount
The amount you entered, confirming the calculation is correct. This is the gross amount that was paid, matching your invoice or receipt. Use this to verify the breakdown is accurate.
What is GST Inclusive Price?
Understanding GST inclusive pricing and how to extract tax from total amounts.
Real-World Examples
See how businesses use this calculator in different scenarios.
Australian Invoice Analysis
An accountant processing a supplier invoice
Calculation Steps
- Invoice total: A$1,320
- GST rate: 10%
- Base amount: A$1,320 ÷ 1.10 = A$1,200
- GST amount: A$1,320 - A$1,200 = A$120
Indian Purchase Order
A business analyzing a purchase cost
Calculation Steps
- Total paid: ₹29,500
- GST rate: 18%
- Base amount: ₹29,500 ÷ 1.18 = ₹25,000
- GST amount: ₹29,500 - ₹25,000 = ₹4,500
New Zealand Receipt
A freelancer tracking business expenses
Calculation Steps
- Receipt total: NZ$920
- GST rate: 15%
- Base amount: NZ$920 ÷ 1.15 = NZ$800
- GST amount: NZ$920 - NZ$800 = NZ$120
How to Use
Four simple steps to extract GST from inclusive prices.
Select Country
Choose your country to load the correct GST rate. The calculator automatically sets the default rate and currency symbol for your region.
Enter Total Amount
Type the price including tax (GST inclusive amount). This is the total shown on invoices or receipts that you need to break down.
Adjust Rate (Optional)
Change the rate if needed for special tax zones. The default rate is loaded automatically, but you can customize it for specific situations.
View Breakdown
See base amount, GST, and total instantly. The calculator shows all three values clearly for easy reference and record keeping.
Why Use This Calculator?
Key benefits of using our GST inclusive calculator for tax analysis.
Accurate Tax Breakdown
Calculate base amount and GST with precision to 2 decimal places, meeting accounting standards. No manual errors, perfect for professional bookkeeping and tax compliance.
Country-Specific Rates
Automatically loads correct GST rates for Australia (10%), New Zealand (15%), Canada (5%), India (18%), and Singapore (9%). Supports custom rates too.
Formula Transparency
See the exact calculation formula for audit trails and verification purposes. Understand how the base amount and GST are derived from the total.
Mobile-Friendly
Works on phones and tablets for on-the-go invoice processing. Calculate GST anywhere, whether in the office or working remotely.
Parameters Explained
Understanding each input field and how it affects your calculation.
Total Amount (GST Inclusive)
The price including tax, as shown on invoices or receipts. This is your starting point - the total amount that already contains GST. For example, if an invoice shows $110 including GST, enter 110. This is also called the gross amount or inclusive price.
GST Rate
The tax percentage to remove from the total. Each country has a standard rate: Australia 10%, New Zealand 15%, Canada 5%, India 18%, Singapore 9%. You can enter a custom rate if dealing with special tax zones or reduced rates for certain goods.
Country
Your country determines the default GST rate and currency symbol. Select your country to automatically load the correct settings. The calculator supports Australia, New Zealand, Canada, India, and Singapore with their respective tax systems.
Calculation Formulas
Mathematical formulas used to extract GST from inclusive prices
Base Amount
This formula calculates the price before GST was added. Divide the total by (1 + rate as decimal) to find the base. For example, with a total of $110 and rate of 10%, you get $110 ÷ 1.10 = $100 base amount.
Base Amount = Total Amount ÷ (1 + GST Rate ÷ 100)
Example: Total: $110, Rate: 10% → Base = 110 ÷ 1.10 = $100
GST Amount
This formula calculates the tax component. Subtract the base amount from the total to find the GST. This is the amount that was added as tax and what you report in your GST return.
GST Amount = Total Amount - Base Amount
Example: Total: $110, Base: $100 → GST = 110 - 100 = $10
Common Questions
Answers to frequently asked questions about removing GST from prices.
GST inclusive means the price already includes tax. GST exclusive means the price before tax is added. Use this calculator when you have an inclusive price and need to extract the base amount and GST. For example, if an invoice shows $110 inclusive, the base is $100 and GST is $10 at 10% rate.
You can verify by adding the base amount and GST amount - they should equal your total. Or multiply the base by (1 + rate) to get the total. The calculator uses standard formulas accepted by tax authorities and accounting software.
Yes, the calculations are accurate for tax filing purposes. The results show the base amount (your expense) and GST amount (your input tax credit). Always keep original invoices and receipts as supporting documentation for your tax return.
The base amount is always less than the total because GST has been removed. If you paid $110 including 10% GST, the base is $100. The $10 difference is the tax component that was included in the total price.
Yes, you can enter any rate between 0.01% and 100%. The calculator works for GST, VAT, HST, or any similar consumption tax. Just enter your specific rate if it differs from the default country rates provided.
Disclaimer
This calculator provides estimates for informational purposes only. Tax laws and rates may change. Always verify current GST rates with official government sources. For tax advice specific to your situation, consult a qualified tax professional or accountant. We are not responsible for any decisions made based on this tool.