FreeTAX CALCULATOR
GST Tax Calculator
Real-time CGST, SGST, and IGST tax calculator with Composition scheme options and inclusive modes.
100% client-side. Nothing you type is uploaded or stored on a server.
How to use
- 1Pick ‘Add GST’ if you know the base price, or ‘Remove GST’ to back-calculate from an MRP.
- 2Tap a rate (0, 3, 5, 18, 40%) or type a custom one.
- 3Switch to IGST for inter-state supplies.
- 4Optionally compare with the composition scheme.
Questions
What changed in September 2025?
The GST Council merged the 12% and 28% slabs into 5% and 18%, with a 40% rate for sin and luxury goods. Use custom rates for invoices dated earlier.
How is inclusive tax computed?
Base = MRP ÷ (1 + rate). For ₹1,180 at 18%, base is ₹1,000 and GST is ₹180.
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