---
type: "tool"
title: "GST Calculator"
description: "Free GST calculator with the current 0/5/18/40% slabs (GST 2.0, from 22 Sep 2025). CGST/SGST/IGST split, HSN lookup, plus legacy mode for old invoices."
resource: "https://www.gstcalculators.in/gst-calculator.html"
language: "en"
bundle_generated: "2026-10-12"
---

# GST Calculator

Free GST calculator with the current 0/5/18/40% slabs (GST 2.0, from 22 Sep 2025). CGST/SGST/IGST split, HSN lookup, plus legacy mode for old invoices.

- Canonical page: [GST Calculator](https://www.gstcalculators.in/gst-calculator.html)
- Publisher: [Tool Master Hub / GSTCalculators.in](../site.md)
- Category: [Basic Financial Calculators](../categories/basic.md)

This is a discovery summary of the public page, not an independently reviewed replacement. Use the canonical page for current inputs, assumptions, formulas, source links and results. The bundle generation date does not mean that tax rules were reviewed on that date.

## Topics on the page

- Embed This Calculator On Your Site

## Questions and answers from the visible page

### What are the current GST slabs in India?

Since 22 September 2025 the main slabs are 0%, 5%, 18% and 40%, plus special rates of 3% for gold, silver and jewellery and 0.25% for rough diamonds. The 12% and 28% slabs were withdrawn under GST 2.0.

### Can I still charge 12% GST?

No. Charging 12% on an invoice dated on or after 22 September 2025 is incorrect and can attract a penalty under Section 122 of the CGST Act. This calculator keeps 12% and 28% available only for reconciling older invoices, and flags them as legacy.

### How is CGST and SGST split?

For intra-state supply the GST is split equally: 18% becomes 9% CGST plus 9% SGST. For inter-state supply the full rate is charged as IGST.

### What is the 40% GST slab for?

Demerit, luxury and sin goods — aerated drinks, luxury cars, motorcycles above 350cc, yachts, casinos and online money gaming. Pan masala and most tobacco moved to 40% on Retail Sale Price from 1 February 2026.

## Accuracy and corrections

[Methodology](https://www.gstcalculators.in/methodology.html) · [Editorial policy](https://www.gstcalculators.in/editorial-policy.html) · [Disclaimer](https://www.gstcalculators.in/disclaimer.html) · [Report a problem](https://www.gstcalculators.in/contact.html).