Compute GST on any invoice amount with automatic CGST/SGST split for intra-state or IGST for inter-state supplies.
This GST calculator handles both forward (add GST to base) and reverse (extract GST from an inclusive amount) computations for all Indian GST rates — 0.25%, 3%, 5%, 12%, 18% and 28%. It automatically splits the tax into CGST + SGST for intra-state supply, IGST for inter-state supply, and computes the compensation cess where applicable (luxury cars, tobacco, aerated drinks).
GST is a destination-based tax — the place-of-supply rules under Section 10 (goods) and Section 12 (services) of the IGST Act decide whether CGST+SGST or IGST applies. For services with a Bill-To / Ship-To split, use the Bill-To state to determine POS unless a specific rule (e.g., Section 12(3) immovable property, Section 12(11) event admission) overrides.
Inter-state B2B supply of consultancy services.
Retailer receives an inclusive quote and needs the base to record purchase.
| Rate | Typical goods / services |
|---|---|
| 0% / exempt | Fresh milk, fruits, unpacked food grains, education, healthcare |
| 0.25% | Cut & polished diamonds |
| 3% | Gold, silver, jewellery |
| 5% | Packaged food, footwear ≤₹1000, small restaurants, transport |
| 12% | Butter, ghee, processed food, business-class air travel |
| 18% | Most services, capital goods, telecom, software, standard products |
| 28% + cess | Luxury cars, tobacco, aerated drinks, casinos |
Applying CGST+SGST on inter-state supply — should be IGST.
Wrong HSN / SAC classification → wrong rate → notice under Section 74.
Charging GST on exempt supplies (e.g., agricultural produce).
Not showing GSTIN, HSN and place of supply on tax invoice — invoice is non-compliant.
Need a CA to review your numbers? Book a free consult — we'll double-check within 24 hours.
Use our HSN/SAC Finder to lock the correct rate before printing invoices.
For SEZ / export supplies, use LUT and charge zero GST — don't debit-note later.
Reconcile GSTR-2B against purchase register monthly — ineligible ITC costs 24% interest.
CGST + SGST applies for intra-state supplies (supplier and place of supply in same state). IGST applies for inter-state and imports.
Use our HSN/SAC Finder to look up the correct rate for your product or service.
When a supplier gives you a GST-inclusive price and you need to break it into base + GST for invoicing or ITC reconciliation.
via Reverse GST CalculatorGST is mandatory only if your turnover exceeds the GST threshold. Otherwise PAN is enough.
via MSME / Udyam RegistrationNo. Processing fees, insurance, GST on fees and stamp duty are excluded and vary per lender. Add them separately to arrive at the true cost of the loan.
via EMI CalculatorNo. Processing fees, insurance, GST on fees and stamp duty are excluded and vary per lender. Add them separately to arrive at the true cost of the loan.
via Personal Loan CalculatorNo. Processing fees, insurance, GST on fees and stamp duty are excluded and vary per lender. Add them separately to arrive at the true cost of the loan.
via Home Loan CalculatorThis dataset is free to reference in articles, research and reports. Attribution to Taxpex Consultancy is all we ask. Data last verified 31 July 2026.
Taxpex Consultancy. (2026). GST Calculator — Taxpex. Retrieved from https://taxpex.com/tools/gst/gst-calculator<a href="https://taxpex.com/tools/gst/gst-calculator">GST Calculator — Taxpex</a> — Taxpex Consultancy