Sometimes you already have the total price — but you need to know how much of it was GST. That’s where this reverse GST calculator comes in.
Whether you’re preparing an invoice, checking a receipt, or separating tax from earnings, this tool lets you quickly extract the GST portion from any total price. No formulas to remember, no manual math. Just accurate results in seconds.
Unlike a standard GST calculator that adds tax to a base price, a reverse GST calculator works the other way. It takes a total price (including GST) and helps you find:
The GST amount
The price before GST
It’s especially useful when you’re working with totals where the tax isn’t clearly broken out — like receipts, inclusive quotes, or earnings that need to be separated for accounting purposes.
This calculator is ideal for:
📄 Invoicing: Splitting out the GST component from total amounts
💼 Business bookkeeping: Calculating how much tax to report or reclaim
💵 Freelancers or contractors: Determining net income vs GST paid
🛍️ Receipts: Figuring out how much you actually paid in tax
💡 General curiosity: Wanting to understand how GST affects your final prices
It’s fast, flexible, and easy to use — no matter what country or GST rate you’re dealing with.
Enter the total price (including GST)
Example: $230
Enter your GST rate (percentage)
Example: 15%
View your results
Instantly, you’ll see:
The price before GST
The GST amount included in the total
You can then copy these values into your invoice, spreadsheet, or records.
Let’s say you enter a total of $230 and use the standard 15% GST rate.
Price before GST: $200.00
GST amount: $30.00
This tool does all the work, rounding cleanly and giving you easy-to-understand numbers.
You can enter any GST rate, not just 15%. Whether you're dealing with 5%, 10%, 12.5%, or another value, the calculator adjusts instantly to match your region or use case.
You’ll get two clear values:
Price Before GST (D)
GST Amount (C)
This format is useful for copying directly into reports, invoices, or client communications — saving you time and improving accuracy.
Whether you're a business owner working with tax invoices, a freelancer preparing your return, or just want a clearer understanding of what’s tax and what’s not — this reverse GST calculator is built to make it simple.