GST Calculator India — Add or Remove GST
GST 2.0 (in force since 22 September 2025) rationalized India's slabs to 5% and 18%, with a 40% demerit rate on select goods. Calculate GST both ways — add it to a base price or extract it from an inclusive amount.
How GST is calculated
Adding GST scales the base price up; removing GST works backwards from an inclusive price — a common need when invoices show only the final amount.
Remove GST: base = amount ÷ (1 + r ÷ 100)
₹10,000 at each GST 2.0 slab
| Rate | Add GST: tax / total | Remove GST: base / tax inside |
|---|---|---|
| 5% | ₹500 / ₹10,500 | ₹9,523.81 / ₹476.19 |
| 18% | ₹1,800 / ₹11,800 | ₹8,474.58 / ₹1,525.42 |
| 40% | ₹4,000 / ₹14,000 | ₹7,142.86 / ₹2,857.14 |
GST 2.0 — what changed on 22 September 2025
The GST 2.0 reform collapsed the earlier multi-slab structure into two main rates — 5% for merit/essential goods and 18% as the standard rate — plus a 40% demerit rate on select items like tobacco, pan masala and luxury goods. Most everyday services, electronics and financial charges fall under 18%. Notably, all credit card charges (annual fees, interest, late fees) attract 18% GST.
Frequently asked questions
What are the GST slabs in India now?
GST 2.0, effective 22 September 2025, rationalized the earlier multi-slab structure into two main rates — 5% and 18% — plus a 40% demerit rate on select goods such as tobacco, pan masala and luxury items.
How do I add GST to a price?
Multiply the base amount by (1 + rate ÷ 100). Adding 18% GST to ₹10,000 gives ₹11,800 — the GST component is ₹1,800. At 5% the total is ₹10,500 and at 40% it is ₹14,000.
How do I remove GST from an inclusive amount?
Divide the inclusive amount by (1 + rate ÷ 100). If ₹10,000 already includes 18% GST, the base price is ₹8,474.58 and the GST portion is ₹1,525.42. At 5% the base is ₹9,523.81.
Is GST charged on credit card fees?
Yes. Credit card charges — annual fees, interest, late payment fees and EMI processing charges — attract 18% GST. A ₹500 late fee actually costs you ₹590 after GST.
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