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GST Calculator India (Add or Remove GST Online)

This GST calculator adds GST to a price or removes it from a GST-inclusive total. Pick the rate (0%, 3%, 5%, 18% or 40% under GST 2.0) and whether the sale is within your state or to another state, and it shows the tax with the CGST and SGST or IGST split.

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Calculator and results

Adding 18% GST to a base price of ₹10,000 results in ₹1,800 total GST (₹900 CGST + ₹900 SGST for intra-state supply) and a final gross invoice amount of ₹11,800.

Goods and Services Tax (GST)

GST 2.0 Slabs (Effective 22 Sep 2025)

Add GST to a net price or reverse-calculate GST from a gross invoice price under the GST 2.0 regime.

₹

Enter the price before GST is applied.

Select an official statutory GST slab:

%

GST 2.0 statutory slabs: 0%, 3%, 5%, 18%, and 40% (12% and 28% removed).

Supply Type:

GST Breakdown Results

Total GST Amount

₹1,800

At 18% statutory rate

Final Invoice Price

₹11,800

Includes net price + GST

Base Amount (Net):₹10,000
GST Rate:18%
• Central GST (CGST @ 9%):₹900
• State GST (SGST @ 9%):₹900
Gross Invoice Amount:₹11,800
Input Tax Credit (ITC):

GST-registered businesses can claim ₹1,800 as input tax credit to offset output GST liabilities on eligible business purchases.

Saved scenarios stay in this browser only. No sign-up.

How does the GST Calculator work?

Goods and Services Tax (GST) is a destination-based multi-stage indirect tax levied on the supply of goods and services across India.

Under the GST 2.0 structure effective 22 September 2025, statutory rates are 0% (nil/essential), 3% (gold and silver), 5% (merit essentials), 18% (standard goods and services), and 40% (demerit and luxury goods). The older 12% and 28% slabs have been eliminated.

Intra-State Supply (within same state): Split equally into Central GST (CGST) and State GST (SGST) or Union Territory GST (UTGST).

Inter-State Supply (across state borders): Levied entirely as Integrated GST (IGST) by the central government.

Add GST Mode: Tax = (Net Amount x Rate) / 100. Total = Net + Tax.

Remove GST Mode: Net = Gross / (1 + Rate/100). Tax = Gross - Net.

Worked example (add GST): a ₹10,000 service at 18% GST has ₹1,800 of tax, so the invoice total is ₹11,800. Sold within the same state, the ₹1,800 is split into ₹900 CGST and ₹900 SGST. Sold to another state, it is ₹1,800 IGST.

Worked example (reverse GST): a bill of ₹1,180 that already includes 18% GST has a base price of ₹1,000 (1,180 ÷ 1.18) and ₹180 of GST. A ₹1,05,000 bill at 5% has a base of ₹1,00,000 and ₹5,000 of GST. A quick rule: the GST inside an inclusive price is the total × rate ÷ (100 + rate), which is 15.25% of the total at 18%.

Which rate applies: from 22 September 2025, GST 2.0 runs on two main rates, 5% for everyday goods such as soap, shampoo and toothpaste and 18% for most goods and services, plus 40% for sin and luxury goods such as cigarettes, pan masala and carbonated drinks. Gold and silver stay at 3%, and essentials such as fresh food and individual health and life insurance are at 0%. Check the item's HSN or SAC code if you are not sure.

For businesses, the GST you pay on purchases can usually be set off against the GST you collect (input tax credit). For your income tax, see the Income Tax Calculator; for tax deducted on payments you receive, see the TDS Calculator. For gold bought with 3% GST and making charges, use the Gold Price Calculator.

GST at each rate on ₹10,000

GST rateAdd GST: taxAdd GST: totalRemove GST: base priceRemove GST: tax inside
3%₹300₹10,300₹9,708.74₹291.26
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

Add GST: ₹10,000 is the price before tax. Remove GST: ₹10,000 is the total that already includes GST. Within a state, half the tax is CGST and half SGST; between states it is all IGST.

GST Calculator formula

Exclusive: Gross = Net x (1 + r/100); Inclusive: Net = Gross / (1 + r/100)

Net
= Pre-tax base price of good or service
Gross
= Invoice amount including GST
r
= Applicable GST 2.0 slab rate (0%, 3%, 5%, 18%, or 40%)

CGST and SGST each equal exactly 50% of total GST on intra-state supplies.

GST Calculator: worked example

₹10,000 Item with 18% GST (Intra-State Supply)

Pre-Tax Base Amount
₹10,000
Applicable GST Slab Rate
18%
Central GST (CGST @ 9%)
₹900
State GST (SGST @ 9%)
₹900
Total GST Liability
₹1,800
Total Invoice Price
₹11,800

GST Calculator: frequently asked questions

How do you calculate GST from a gross amount (Remove GST)?
To remove GST from a total invoice price, divide the total by (1 + GST rate / 100). For example, on a ₹11,800 invoice with 18% GST: Base price = 11,800 / 1.18 = ₹10,000, and GST amount = ₹1,800.
What is the difference between CGST, SGST, and IGST?
For transactions within the same state (intra-state), GST is split equally between CGST (Central Govt) and SGST (State Govt). For transactions across different states (inter-state), IGST (Integrated GST) is charged in full.
What GST rate applies to gold and jewellery in India?
Gold bullion and gold jewellery attract a 3% GST on the value of gold. Making charges on jewellery attract 18% GST if billed separately or 5% if part of pure job work.
What are the primary GST 2.0 tax slabs in India?
The main GST rates are 0%, 5%, 18% and 40%, with 3% for gold and silver. Under GST 2.0, in force from 22 September 2025, 0% covers essentials, 5% everyday goods, 18% most goods and services, and 40% sin and luxury goods. The old 12% and 28% slabs are gone.
What is the GST threshold exemption for small businesses in India?
GST registration is required above ₹40 lakh of annual turnover for goods and ₹20 lakh for services. In special category states the limits are ₹20 lakh for goods and ₹10 lakh for services.
Can businesses claim input tax credit (ITC) on GST paid?
Yes. Registered taxpayers can claim Input Tax Credit (ITC) on GST paid for business purchases and operating expenses to offset their output GST liability.
What is the formula to calculate GST?
To add GST: GST = Price × Rate ÷ 100, and Total = Price + GST. To remove GST from an inclusive total: Base price = Total × 100 ÷ (100 + Rate), and GST = Total minus the base price. At 18%, ₹1,000 becomes ₹1,180, and ₹1,180 contains ₹180 of GST.
How do I calculate 18% GST on an amount?
Multiply the amount by 0.18 for the tax, or by 1.18 for the total. ₹25,000 at 18% has ₹4,500 of GST and a total of ₹29,500. Within a state that is ₹2,250 CGST plus ₹2,250 SGST.
Are there still 12% and 28% GST rates?
No. GST 2.0, in force from 22 September 2025, removed the 12% and 28% slabs. Most items moved to 5% or 18%, and a few luxury and sin goods moved to 40%.

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Reviewed by Pradipta Ray, MBA (Finance) · Updated