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GST

GST Calculator

Add GST to a price, or take GST out of a price that includes it. Enter one amount or a whole bill with lines at different rates, and get CGST and SGST or IGST to the paisa, adding up exactly to the bill total.

GST rates from 1 February 2026

Your results will appear here

Enter an amount on each line to see the taxable value, CGST and SGST or IGST, and the bill total.

Sources & calculation basis5
Section 15(1), Central Goods and Services Tax Act, 2017Parliament of India
The value of a supply of goods or services or both shall be the transaction value, which is the price actually paid or payable for the said supply of goods or services or both where the supplier and the recipient of the supply are not related and the price is the sole consideration for the supply.

GST is charged on the taxable value, which does not include the GST itself. For a price that includes GST, the calculator works the taxable value back out of the price.

View official source
Notification No. 9/2025-Central Tax (Rate), 17 September 2025Ministry of Finance, Department of Revenue
2.5 per cent. in respect of goods specified in Schedule I; 9 per cent. in respect of goods specified in Schedule II; 20 per cent. in respect of goods specified in Schedule III; 1.5 per cent. in respect of goods specified in Schedule IV; 0.125 per cent. in respect of goods specified in Schedule V; 0.75 per cent. in respect of goods specified in Schedule VI

Central tax rates for intra-state supplies. State tax (SGST or UTGST) is charged at the same rate under the matching state and union territory notifications, so each head is half the total rate. Search for the notification number on the CBIC tax information portal.

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Notification No. 9/2025-Integrated Tax (Rate), 17 September 2025Ministry of Finance, Department of Revenue
5 per cent. in respect of goods specified in Schedule I, 18 per cent. in respect of goods specified in Schedule II, 40 per cent. in respect of goods specified in Schedule III, 3 per cent. in respect of goods specified in Schedule IV, 0.25 per cent. in respect of goods specified in Schedule V, 1.50 per cent. in respect of goods specified in Schedule VI

Integrated tax rates for inter-state supplies: the total rates offered in the rate list.

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Notification No. 19/2025-Central Tax (Rate), 31 December 2025Ministry of Finance, Department of Revenue
Amends Notification No. 9/2025-Central Tax (Rate): Schedule VII (14% central tax, 28% in total) is omitted; pan masala and tobacco products move to Schedule III and biris to Schedule II, from 1 February 2026.

The 28% rate no longer applies to goods from 1 February 2026, so it is not in the rate list. Search for the notification number on the CBIC tax information portal.

View official source
Section 170, Central Goods and Services Tax Act, 2017Parliament of India
The amount of tax, interest, penalty, fine or any other sum payable, and the amount of refund or any other sum due, under the provisions of this Act shall be rounded off to the nearest rupee and, for this purpose, where such amount contains a part of a rupee consisting of paise, then, if such part is fifty paise or more, it shall be increased to one rupee and if such part is less than fifty paise it shall be ignored.

Used for the optional round-off of the bill total to the nearest rupee. The Act does not fix how paise are rounded on each invoice line; the per-line method on this page is the method Khatakit uses.

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Assumptions & limitations

The rate list covers GST rates on goods notified from 22 September 2025, after the 28% rate was removed on 1 February 2026. Check the rate for your goods or service, and use Other rate for anything not listed. Compensation cess, reverse charge, discounts, the composition scheme and special valuation rules are not covered. Paise are rounded by the method described on this page, which is Khatakit's method, not a rule in the law.

How the tax is worked out

Amount excluding GST (add GST)

Taxable value = amount

Within the state: CGST = SGST = taxable value × (rate ÷ 2)

Between states: IGST = taxable value × rate

Each tax is rounded to the paisa. The line total is the taxable value plus the tax.

Amount including GST (remove GST, reverse GST)

Taxable value ≈ amount ÷ (1 + rate)

The calculator takes the largest paise amount whose taxable value plus rounded tax does not go over the amount. If that total is a paisa or two short of the amount, the difference is shown as a round-off on the line.

Bill

Lines are added together and grouped by rate. If you choose to round the bill, the total goes to the nearest rupee: 50 paise or more rounds up, and the difference is shown as a round-off.

Worked example

A bill within the state with three lines, all excluding GST: 1,234.50 at 5%, 2,599.99 at 18% and 845.25 at 40%.

Worked example by rate, in rupees
RateTaxable valueCGSTSGSTTotal
5%1,234.5030.8630.861,296.22
18%2,599.99234.00234.003,067.99
40%845.25169.05169.051,183.35
Bill4,679.74433.91433.915,547.56

On the 5% line, CGST is 1,234.50 × 2.5% = 30.8625, which rounds to 30.86. Rounded to the nearest rupee, the bill total of 5,547.56 becomes 5,548.00, with a round-off of +0.44.

Removing GST: 999.00 including GST at 5% within the state gives a taxable value of 951.42, CGST 23.79 and SGST 23.79, which add back to 999.00. Between states the same amount gives a taxable value of 951.43 and IGST 47.57.

Rounding method

This is the method Khatakit uses. The CGST Act does not say how to round paise on each invoice line.

  • Tax is worked out on each line, then added up. Each tax is rounded to the paisa, and half a paisa rounds up.
  • CGST and SGST are each rounded, so they are always equal and always add up to the tax shown.
  • Section 170 of the CGST Act rounds tax and other amounts payable to the nearest rupee, with 50 paise or more rounding up. The optional bill round-off uses the same rule.
  • Billing software that works out tax on the total for each rate, instead of on each line, can differ by a paisa.

Edge cases

  • Some amounts including GST have no exact paise answer. 100.10 including 18% within the state: a taxable value of 84.83 gives 7.63 + 7.63 = 100.09, and 84.84 gives 7.64 + 7.64 = 100.12. The calculator shows 84.83 with a round-off of +0.01.
  • Mixed rates: add a line for each rate or each item. The results group lines by rate.
  • Lines including GST and lines excluding GST can be mixed in the same bill.
  • A 0% line has no tax. Its taxable value is the amount entered.
  • On very small amounts a tax can round to 0.00, for example 0.05 at 5%.
  • Within the state and between states can differ by a paisa on the same amount, because CGST and SGST are rounded separately. 0.20 at 5% gives CGST 0.01 and SGST 0.01, but IGST 0.01.
  • Changing the supply type recalculates every line.

Rates and supported period

The rate list covers GST on goods under Notification 9/2025-Central Tax (Rate) and 9/2025-Integrated Tax (Rate), in force from 22 September 2025: 5%, 18% and 40%, plus 3% for gold, silver, platinum, pearls, jewellery and coins, 1.5% for diamonds other than rough diamonds, and 0.25% for rough diamonds and precious and semi-precious stones.

The 28% rate for pan masala and tobacco products was removed from 1 February 2026, so the list matches supplies from that date. For an earlier supply at 28%, a service, or any other rate, choose Other rate and type it in. Rates were checked on 14 September 2026.

Not covered: compensation cess and other cesses, reverse charge, discounts, the composition scheme and special valuation rules. Everything is calculated in your browser; nothing you enter is sent anywhere.

Filing late? The GST late fee and interest calculator works out the late fee and interest on a GST return filed after its due date.

References