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GST Calculator

Add GST to a price or take it out of a GST-inclusive price, with the CGST, SGST or IGST split.

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GST Calculator Nothing is stored or sent

For general information only, not financial or tax advice. Actual EMIs, returns and tax depend on your lender, bank or fund and the latest rules, so confirm before you decide.

What your result means

The calculator shows three amounts and how the tax is split between the Centre and the states.

Result What it means
Net amount The price before GST (taxable value).
GST amount The total tax on that price.
Total amount Net amount + GST, the price the buyer pays.
CGST + SGST For a sale within one state: half the GST goes to the Centre (CGST), half to the state (SGST or UTGST).
IGST For a sale between two states: the full GST is charged as IGST.

All amounts are shown to two decimal places (paise). The total GST is the same either way. Only the split changes.

How GST is calculated

There are two cases. Either your price does not include GST yet, or it already does.

Add GST (price excludes GST)

  • GST = amount × rate ÷ 100
  • Total = amount + GST

Remove GST (price includes GST)

  • Net = amount × 100 ÷ (100 + rate)
  • GST = amount − net
  • Amount: the price you type in.
  • Rate: the GST rate for the item, such as 5 or 18.
  • Net: the taxable value, the price without tax.

Within one state, CGST = SGST = GST ÷ 2. Between states, IGST = GST. GST is always worked out on the taxable value, never on top of another GST amount.

How to use the GST calculator

  1. Enter the amount in rupees.
  2. Pick the GST rate: 0%, 0.25%, 3%, 5%, 18% or 40%.
  3. Choose the mode: Add GST if the price excludes GST, or Remove GST if it already includes GST.
  4. Choose the supply type: within a state (CGST + SGST) or between states (IGST).
  5. Read the net amount, GST and total, with the tax split below.

Worked example

Adding GST. A Pune web designer bills a Pune client ₹10,000 plus 18% GST.

  1. GST: ₹10,000 × 18 ÷ 100 = ₹1,800.00.
  2. Total: ₹10,000 + ₹1,800 = ₹11,800.00.
  3. Same state, so CGST ₹900.00 and SGST ₹900.00.

If the client were in Bengaluru, the bill would show IGST ₹1,800.00 instead. The total stays ₹11,800.00.

Removing GST. A shirt costs ₹1,000 including 5% GST.

  1. Net: ₹1,000 × 100 ÷ 105 = ₹952.38.
  2. GST: ₹1,000 − ₹952.38 = ₹47.62 (CGST ₹23.81 + SGST ₹23.81).

A common mistake is to take 5% of ₹1,000 (₹50) off the inclusive price. That gives the wrong answer, because the 5% was charged on ₹952.38, not on ₹1,000. In the same way, GST inside ₹11,800 at 18% is ₹1,800, not ₹2,124.

Quick GST multipliers

No calculator handy? Multiply by the figure in the second column to add GST, or divide by it to remove GST. The last column tells you how much of a GST-inclusive price is tax.

GST rate Multiply to add, divide to remove GST share of an inclusive price
0.25% 1.0025 0.25%
3% 1.03 2.91%
5% 1.05 4.76%
18% 1.18 15.25%
40% 1.40 28.57%

So a ₹1,400 item at 40% has a net price of ₹1,400 ÷ 1.40 = ₹1,000, and 28.57% of the ₹1,400 (₹400) is GST.

GST rates after GST 2.0

The 56th GST Council meeting on 3 September 2025 approved a simpler rate structure, in force from 22 September 2025. It is often called GST 2.0. It cut the main slabs from four (5%, 12%, 18% and 28%) to two (5% and 18%), plus a special 40% rate. Tobacco products came last: pan masala, cigarettes and tobacco (other than bidi) stayed at their old rate plus compensation cess until 31 January 2026, and moved to 40% GST from 1 February 2026, when the cess on them ended. Bidi moved to 18%.

Rate Used for
0% (exempt) Some basic items, such as fresh food, and some services, such as individual life and health insurance
0.25% Rough diamonds and some precious stones
3% Gold, silver and jewellery
5% Many daily-use goods, such as soap, toothpaste, butter and ghee
18% Most other goods and most services, including small cars, ACs and TVs
40% Luxury and sin goods, such as pan masala, tobacco, aerated drinks and large cars

Most items that were taxed at 12% moved to 5%, and most items at 28% moved to 18%. Some services, like restaurants, have special rates or conditions. Rates depend on the exact item and its HSN or SAC code, so always check yours on the CBIC rate finder before you raise an invoice.

What the October 2026 GST Council meeting changed

The 57th GST Council meeting on 8 October 2026 kept the 5%, 18% and 40% structure. It focused on process changes: no arrest provisions, a higher ₹5 crore threshold for prosecution, a lower ₹10,000 general penalty, faster refunds and simpler registration. It also recommended a few item-level changes, such as nil GST on psyllium (isabgol) seeds and 5% GST without input tax credit on delivery services booked through e-commerce apps. These take effect only once notified, so check the CBIC notification date before you change an invoice.

Is GST included in the MRP?

Yes. The MRP printed on a packet is “inclusive of all taxes”, so a shop cannot add GST on top of it. To see how much of an MRP is GST, use Remove GST mode. For example, a ₹118 item taxed at 18% has a net price of ₹100.00 and GST of ₹18.00. Restaurant bills and service invoices are different: they usually list prices before tax and add GST at the end, so use Add GST mode to check them. If a bill shows CGST and SGST, each should be exactly half of the total GST.

Who needs to register

You must register for GST once your yearly turnover crosses ₹40 lakh if you sell only goods, or ₹20 lakh if you provide services. Some special category states, mostly in the North-East and the hills, have lower limits. Some businesses must register at any turnover, such as those selling goods to other states. Check the current rules on the GST portal.

Need a percentage for something else? Try the percentage calculator. For tax on your own income, use the income tax calculator.

Limitations

  • You pick the rate. The tool does not know which rate applies to your item. A wrong rate gives a wrong answer.
  • No cess or other duties. It does not add customs duty, excise or any other levy.
  • No input tax credit. It does not work out how much GST a business can claim back or must pay after credits.
  • Rounding. Invoices round each line in their own way, so totals can differ by a few paise.
  • No special schemes. Composition scheme rates and reverse charge are not covered.
  • Current rates only. The rate list has today’s rates. To check an old invoice at 12% or 28% (before 22 September 2025), use the percentage calculator with the formulas above.

Key facts

FAQ

GST Calculator FAQs

How do I calculate GST?

To calculate GST, multiply the price before tax by the GST rate and divide by 100. For ₹10,000 at 18%, GST is ₹10,000 × 18 ÷ 100 = ₹1,800, so the total is ₹11,800. Within one state this is split into ₹900 CGST and ₹900 SGST. Between states, the full ₹1,800 is charged as IGST.

How do I remove GST from a price (reverse GST)?

To remove GST, multiply the GST-inclusive price by 100 and divide by 100 plus the rate. For ₹11,800 at 18%, the net price is ₹11,800 × 100 ÷ 118 = ₹10,000, so GST is ₹1,800. Do not simply take 18% off the total, as that gives ₹2,124, which is wrong. Use Remove GST mode in the calculator.

What are the GST rates in 2026?

The main GST rates in 2026 are 5% and 18%, with 40% for luxury and sin goods such as large cars and aerated drinks. Pan masala, cigarettes and tobacco joined the 40% rate on 1 February 2026. Gold and silver are taxed at 3% and rough diamonds at 0.25%. Some basic items are exempt. Check your item on the CBIC rate finder, as rates depend on the HSN or SAC code.

What is CGST, SGST and IGST?

CGST and SGST are the central and state shares of GST on a sale within one state, each equal to half the total. IGST is charged on a sale between two states and goes to the Centre, which then shares it with the destination state. For 18% GST, a same-state sale shows 9% CGST and 9% SGST, while an inter-state sale shows 18% IGST.

Which items are 5% vs 18%?

Many daily-use goods, such as soap, shampoo, toothpaste, butter, ghee and packaged snacks, are taxed at 5% after GST 2.0. Most other goods and most services are at 18%, including small cars, air conditioners, TVs and cement. Rates depend on the exact item and its HSN code, so confirm yours on the CBIC rate finder before billing.

Is GST charged on GST?

No, GST is never charged on GST. It is worked out only on the taxable value, the price before tax. CGST and SGST are two halves of the same tax, not one charged on top of the other. If a bill seems to add GST on an amount that already includes GST, ask the seller to correct the invoice.

Who has to register for GST?

You must register for GST if your yearly turnover is above ₹40 lakh and you sell only goods, or above ₹20 lakh if you provide services. Some special category states, mostly in the North-East and hill regions, have lower limits. Some businesses, such as those selling goods to other states, must register at any turnover. Check the GST portal for current rules.

What happened to the 12% and 28% slabs?

The 12% and 28% slabs were removed for most goods from 22 September 2025 under GST 2.0. Most items at 12% moved down to 5%, and most items at 28%, such as small cars, ACs and TVs, moved to 18%. Large cars and aerated drinks moved to 40%. Pan masala, cigarettes and tobacco stayed at 28% plus cess until 1 February 2026, then moved to 40%.