GST Calculator
All slabs — quick comparison
Enter an amount above to populate this table.
| Slab | GST | Excl. → Total | Incl. → Base |
|---|---|---|---|
| 5% | — | — | — |
| 12% | — | — | — |
| 18% | — | — | — |
| 28% | — | — | — |
GST formulas used by this calculator
There are two cases depending on whether the price you have is before or after GST.
CGST, SGST and IGST — what's the difference
India's GST is actually three taxes rolled into one depending on whether the sale is within a state or across states.
Applied when buyer and seller are in the same state. The GST is split equally — half goes to the Central Government (CGST) and half to the state (SGST). If the rate is 18%, each side gets 9%.
Applied when the transaction crosses state lines (inter-state). IGST equals the full GST rate — 18% stays as 18%. The Centre collects it and shares the state portion later. This calculator shows CGST + SGST by default (intra-state).
Used instead of SGST in Union Territories that do not have a legislature — Chandigarh, Dadra & Nagar Haveli, Daman & Diu, Lakshadweep, and Puducherry. Rate is identical to SGST.
GST rate slabs in India (as of 2024)
The GST Council has placed goods and services into five rate brackets.
| Rate | Category | Common examples |
|---|---|---|
| 0% | Essential goods & exempted services | Fresh milk, eggs, fresh fruits, vegetables, grains, books, newspapers |
| 5% | Basic goods & mass-consumption items | Edible oils, sugar, spices, tea, coffee, coal, life-saving drugs, economy air tickets |
| 12% | Standard goods & some services | Computers, processed food, business class air tickets, mobile phones |
| 18% | Most goods & services | Restaurants (AC), financial services, insurance, IT services, telecom, electronics |
| 28% | Luxury & demerit goods | Passenger vehicles, motorcycles above 350cc, tobacco, cement, ACs |
Note: Some items also attract a GST Compensation Cess on top of the 28% rate. This calculator does not include cess.
Frequently asked questions
Is this GST calculator accurate?
The arithmetic is exact. What this calculator cannot tell you is which GST slab applies to your specific product — that depends on the HSN or SAC code assigned to it. Use the calculated figures as a reference and verify the applicable rate with a GST-registered professional or the CBIC HSN finder.
What GST rate applies to my business service?
Most services in India attract 18% GST. Exceptions include healthcare (0%), basic education (0%), life insurance (18%), and a few others. The applicable rate is defined by the SAC code for your service. Check cbic.gov.in or consult your CA.
Can I use this for filing GST returns?
No. This is a quick reference calculator. GST returns (GSTR-1, GSTR-3B, etc.) must be filed on the official GST portal at gst.gov.in with exact invoice-level data.
What is Input Tax Credit (ITC)?
ITC lets registered businesses offset the GST paid on purchases (inputs) against the GST collected on sales (output tax). This calculator does not account for ITC — it only computes the gross GST on a single transaction.
When did GST come into effect in India?
GST was implemented on 1 July 2017, replacing a multi-layered system of central and state taxes including VAT, service tax, central excise duty, and over a dozen other levies.