Reverse GST Calculator
Have a final, GST-inclusive price and need to back-calculate the taxable value and tax? This reverse GST calculator splits any inclusive amount into base + CGST/SGST or IGST at any slab.
- CGST (9%)
- ₹900.00
- SGST (9%)
- ₹900.00
- Total GST
- ₹1,800.00
- Inclusive total
- ₹11,800.00
Frequently asked questions
How do you remove GST from a price?
Taxable value = inclusive amount × 100 ÷ (100 + rate). The GST is then the inclusive amount minus that taxable value. This tool does it automatically and shows the CGST/SGST or IGST split.
When do I need reverse GST?
Whenever a price already includes tax — MRP-style retail pricing, a quoted "all-inclusive" amount, or reconciling a receipt — and you need the pre-tax value and the tax for your books.
Which rates are supported?
All common slabs: 0%, 0.25%, 3%, 5%, 12%, 18% and 28%.
Stop calculating GST by hand
Our offline desktop app does this on every invoice — correct CGST/SGST/IGST, GSTIN validation, HSN/SAC and filing-ready returns. Try it free for 14 days.