Target final amount and GST rate → base = total ÷ (1 + GST% ÷ 100), GST = total − base.
Fixed final payment (e.g. ₹10,000) and GST rate → back-calculate base and GST lines for the invoice.
| Line | Amount (INR) |
|---|---|
| Base price | ₹8,474.58 |
| GST amount | ₹1,525.42 |
| Total amount | ₹10,000.00 |
GST Reverse — Flat Price Invoice helps you target final amount and gst rate → base = total ÷ (1 + gst% ÷ 100), gst = total − base. It is commonly used by finance teams, founders, individual planners for reverse gst calculator, flat price gst, gst from total.
Use case
You agree a single round final payment (e.g. ₹10,000). This tool backs out taxable value and GST so the two lines sum to that total (GST charged on top of base).
For paise-safe rounding on printed invoices, use GST Invoice Round-off (Inclusive) when totals must match exactly.
Disclaimer: This calculator provides information only and is not financial, tax, or legal advice.