Money ManagementETF vs Mutual Fund: Which Is Better for Beginners?
ETF vs Mutual Fund: Which Is Better for Beginners? Explore costs, tax implications, and trading flexibility for informed investment decisions.
MAJun 11, 2026Read More →
GST Calculator
Add or strip Goods and Services Tax from any amount in seconds. Choose a slab, decide whether your figure is before or after tax, and see the CGST, SGST or IGST split instantly.
Written by TopicDrill Editorial Team·Updated June 2026
Price breakup
- Net amount₹10,000
- CGST₹900
- SGST₹900
Advertisement
How the GST calculator works
Goods and Services Tax is a percentage added on top of the value of a product or service. This tool works both ways. In exclusive mode it treats your figure as the net price and adds tax on top. In inclusive mode it treats your figure as the final price and works backwards to reveal how much of it was tax.
Once the tax is calculated, the tool splits it according to the supply type. A sale within a single state is divided into equal halves of CGST and SGST, while a sale that crosses state borders is charged as one combined IGST. The donut chart shows how the net amount and the tax components make up the final price.
A worked example
Suppose you invoice a client 25,000 for design work taxed at the 18 percent slab within your own state. The GST comes to 4,500, made up of 2,250 CGST and 2,250 SGST, so the client pays 29,500 in total. If the same client were in another state, the entire 4,500 would appear as a single IGST line instead.
Things to keep in mind
Always confirm the correct slab for your goods or service, since applying the wrong rate affects your invoice and filings. For the authoritative rules and rate finder, see the official GST portal. If you are pricing a product and want to layer a markup before tax, our discount calculator can help you set the net figure first.
Frequently asked questions
How do I add GST to a price?
Multiply the net amount by the GST rate written as a fraction, then add it back. For an 18 percent slab on a net of 1000, the GST is 1000 times 0.18 which is 180, so the final price is 1180. Choose the exclusive mode in this tool to do that automatically.
How do I remove GST from a price that already includes it?
Divide the gross price by one plus the rate as a fraction. For a price of 1180 that includes 18 percent GST, the net is 1180 divided by 1.18 which is 1000, and the GST portion is 180. Pick the inclusive mode to reverse the tax this way.
What is the difference between CGST, SGST and IGST?
For a sale within the same state the GST is split equally into CGST collected by the centre and SGST collected by the state. For a sale across state lines a single IGST is charged instead at the full rate. This calculator shows whichever split matches the supply type you choose.
Which GST rate should I use?
It depends on the item. Common slabs are 5 percent for essentials, 12 and 18 percent for most goods and services, and 28 percent for luxury or sin items, with some goods at 0 or 3 percent. Check the official rate for your specific product before relying on the figure.
Related guides
View all →
Business FinanceHow Much Will $1,000 Invested Today Be Worth in 10 Years?
Invest $1,000 today and the answer to "what's it worth in 10 years?" ranges from about $1,040 in a basic savings account to roughly $2,594 at the stock market's long-run average. Here's the math behind every scenario — plus how inflation, fees and taxes change the real number.
MAJun 9, 2026Read More →
Business FinanceHow Much Do You Need to Retire Comfortably? (2026 Guide)
There's no single magic number for retirement — but there are proven formulas that get you close. Using the 4% rule, most people need roughly 25 times their annual spending invested. Here's how to find your personal target, factoring in Social Security, healthcare, inflation and lifestyle.
MAJun 9, 2026Read More →
Advertisement