GST Calculator — Add or Remove GST
Add GST to a base price or extract it from an MRP — CGST/SGST split at the post-2025 rate structure.
Formula
Disclaimer: Informational estimate using recently applicable rates/slabs — budgets change them. Verify current-year rules or consult a tax professional. This is not tax advice.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
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About GST Calculator — Add or Remove GST
Both directions of India's most-performed business calculation live here: ADD GST to quote a customer, or REMOVE it from an inclusive MRP to find your base value — the direction people get wrong, because extracting 18% from ₹11,800 means dividing by 1.18 (₹10,000 base, ₹1,800 GST), never multiplying ₹11,800 × 18% (which double-counts the tax on the tax). The 2025 GST rationalization simplified the rate map: most goods consolidated into the 5% merit and 18% standard rates, the 12% and 28% slabs were largely retired, and a 40% demerit rate covers tobacco-class items — with special rates (0.25% rough diamonds, 3% gold) surviving. The dropdown reflects this structure; if you're invoicing legacy contracts at old rates, the math works for any rate you select. The CGST/SGST line matters for invoices: intra-state supplies split GST equally between centre and state (9% + 9% on a standard-rate item), while inter-state supplies levy the whole amount as IGST — the totals are identical, but invoice fields, GSTR filings and input-credit ledgers track them separately. Composition-scheme dealers and exempt supplies follow their own rules; this calculator handles the regular-scheme arithmetic.
How to use GST Calculator — Add or Remove GST
- 1Enter Amount, GST rate, Direction into the GST Calculator.
- 2The result is computed automatically using Add: GST = base × rate ; Remove: base = inclusive ÷ (1 + rate) — never inclusive × rate, the classic error — there is no button to press; it updates live as you type.
- 3Change any input to model a different scenario, then use “Copy result link” to share the exact numbers.
Why use GST Calculator — Add or Remove GST?
- ✓Computes gst calculator instantly with the correct formula — no spreadsheet needed
- ✓100% free and unlimited, with no sign-up, login or paywall
- ✓Runs entirely in your browser, so the figures you enter are never uploaded or stored
- ✓Shows the formula, a live worked example and references so you can defend the number
Frequently asked questions
MRP me se GST kaise nikaalte hain?+
Divide karke, multiply karke nahi: ₹11,800 (18% inclusive) ka base = 11,800 ÷ 1.18 = ₹10,000; GST = ₹1,800. Galat tareeka — 11,800 × 18% = ₹2,124 — tax par tax gin leta hai. 5% ke liye ÷1.05, 40% ke liye ÷1.40. Upar 'Remove GST' mode yahi karta hai.
2025 ke baad kaunse GST rates chal rahe hain?+
Rationalization ke baad mukhya structure: 5% (merit — essentials, kaafi goods jo pehle 12% me the), 18% (standard — zyadatar services aur goods, pehle ke 28% wale kai items bhi), aur 40% demerit rate (tobacco-class). 0.25% (rough diamonds) aur 3% (gold) special rates bane hue hain. Apne item ka exact rate CBIC notification me confirm karein — transitions me exceptions hote hain.
CGST, SGST aur IGST me kya farak hai?+
Same state me supply: GST aadha-aadha bant'ta hai — CGST (centre) + SGST (state), 18% = 9% + 9%. Dusre state me supply: poora IGST ek saath. Customer ke liye total same; aapke GSTR returns aur input-credit set-off ke liye ledger alag. Invoice me galat head daalna common error hai jo reconciliation me pakda jata hai.
Kya main GST input credit is calculator se nikaal sakta hoon?+
Purchases ke GST-amount nikaalne ke liye haan (Remove mode me inclusive bill daaliye) — par ITC ELIGIBILITY alag sawaal hai: supplier ne GSTR-1 me dikhaya ho (GSTR-2B me reflect), invoice valid ho, goods/services business-use ke hon, aur blocked-credit list (khaana, personal vehicles waghaira) me na aate hon. Amount yahan se, eligibility CA se.
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