01
Enter the amount
Type the figure you want to calculate GST on — a product price, an invoice value, or an MRP. The calculator updates as you type.
GST Calculator
Add or remove GST and split CGST, SGST & IGST — with current GST 2.0 rates.
Updated Reviewed by Sajid Hussain· Editor
Try it with your numbers
Results update in real time as you type — no submit needed.
Your numbers
GST bills sellers in Indian Rupee (INR), so this calculator works in INR — not your selected US Dollar ($). Every figure below matches your real GST statement. Localised USD marketplaces are coming soon.
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Last updated
June 10, 2026
Coverage
Region-specific
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India GST Tool
What Is a GST Calculator?
A GST calculator computes the Goods and Services Tax on any amount in India — adding GST to a base price, or removing it from a GST-inclusive price — and splits the tax into CGST, SGST, or IGST using the current GST 2.0 rates.
Every invoice in India carries GST, and getting it wrong means either short-charging your customer or over-paying the government. This calculator takes an amount, a rate, and a few options, and instantly returns the taxable value, the GST, the CGST/SGST/IGST breakdown, and the final invoice total — both ways, forward and reverse.
**Forward and reverse in one tool.** Add GST to a base price when you are quoting a customer, or remove GST from a GST-inclusive amount (like an MRP) when you need to know how much of it is actually tax. The reverse calculation divides by (1 + rate), which is easy to get wrong by hand — this tool does it exactly.
**The CGST / SGST / IGST split, done correctly.** A sale within your state splits GST equally into CGST and SGST. A sale to another state — or an import — is a single IGST. The calculator applies the right split automatically based on whether you pick intra-state or inter-state supply, so your invoice lines are always correct.
**Built for GST 2.0.** The September 2025 reform collapsed the old 5/12/18/28 structure into two main slabs (5% and 18%), added a 40% rate for luxury and sin goods, and kept 0% nil-rated. This tool ships with those current rates and clearly flags 12% and 28% as legacy rates — something most older calculators still get wrong.
**Cess and reverse charge, too.** For demerit goods like tobacco and aerated drinks, you can layer compensation cess on top of GST and see your effective tax rate. And if a supply falls under the reverse charge mechanism, the tool flags who actually deposits the tax — depth that paid invoicing tools charge for.
Quick facts
- Rate structure
- GST 2.0 (Sep 2025)
- Main slabs
- 0% · 5% · 18% · 40%
- Modes
- Add + Remove GST
- Tax split
- CGST / SGST / IGST
- Also handles
- Cess + reverse charge
- Free to use
- No sign-up needed
How It Works
Calculate GST in Four Steps
02
Pick the GST rate
Choose the applicable slab — 5%, 18%, 40%, or a special rate like 3% for gold. Use "Custom" for an exact HSN-specific rate. The labels show which rates are current GST 2.0 slabs.
03
Choose add or remove, and the supply type
Select whether your amount excludes GST (add it) or includes GST (remove it). Then pick intra-state (CGST + SGST) or inter-state (IGST) so the split is correct on your invoice.
04
Read your GST, split, and total
See the taxable value, total GST, the CGST/SGST or IGST breakdown, and the final invoice value. Add compensation cess or flag reverse charge in the advanced section if they apply.
Steps to use the GST Calculator: Enter the amount, Pick the GST rate, Choose add or remove, and the supply type, Read your GST, split, and total.
The Formula
How GST Is Calculated in India
01
Add GST (exclusive price)
GST = Amount × Rate ÷ 100 · Total = Amount + GST + Cess
When the amount excludes GST, the tax is added on top. GST is the base amount times the rate. Any compensation cess is also charged on the base amount. The total invoice value is the base plus GST plus cess.
Example: 18% on ₹10,000 → GST = 10,000 × 18 ÷ 100 = ₹1,800 → Total = ₹11,800
02
Remove GST (inclusive price)
Taxable Value = Amount ÷ (1 + Rate ÷ 100 + Cess ÷ 100)
When the amount already includes GST (and cess), divide by one plus the combined rate to recover the base value. The GST is then the taxable value times the rate. This is the reverse-GST formula.
Example: ₹11,800 inclusive at 18% → Taxable = 11,800 ÷ 1.18 = ₹10,000 → GST = ₹1,800
03
CGST / SGST / IGST split
Intra-state: CGST = SGST = GST ÷ 2 · Inter-state: IGST = GST
For a sale within the same state, the GST is divided equally between Central GST and State GST. For a sale between states (or an import), the whole tax is a single Integrated GST. The taxable value and total are identical either way — only the split differs.
Example: ₹1,800 GST intra-state → ₹900 CGST + ₹900 SGST; inter-state → ₹1,800 IGST
Worked Example
Step-by-Step Walkthrough (₹10,000 at 18%, intra-state)
Currency note: the example below uses a benchmark scenario priced in Indian Rupee (INR). Values are converted to US Dollar (USD) at the latest exchange rate so you can compare against your own numbers.
Scenario
A shop in Maharashtra sells goods worth $10,000.00 (GST-exclusive) to a buyer in the same state, at the 18% standard GST rate.
1
Step 1 · Taxable Value
The amount entered is GST-exclusive, so it is already the taxable value — GST will be added on top.
Taxable Value = $10,000.00
2
Step 2 · Calculate GST
GST = taxable value × rate ÷ 100 = $10,000.00 × 18% = $1,800.00.
Total GST = $1,800.00
3
Step 3 · Split into CGST + SGST
This is an intra-state supply, so the GST splits equally: 9% CGST + 9% SGST.
CGST = $900.00 · SGST = $900.00
4
Step 4 · Total Invoice Value
Add the GST to the taxable value: $10,000.00 + $1,800.00 = $11,800.00.
Total Invoice Value = $11,800.00
The takeaway
On $10,000.00 at the 18% standard rate, the buyer pays $11,800.00 — of which $1,800.00 is GST, shown on the invoice as $900.00 CGST plus $900.00 SGST. With no cess, the effective tax rate is just the 18% headline rate. Switch the supply to inter-state and the same $1,800.00 appears as a single IGST line instead.
Rate impact
GST Cost by Rate Slab — on a ₹10,000 Item (GST 2.0)
| Metric | Poor | Average | Good | Excellent |
|---|---|---|---|---|
GST rate slab CBIC GST Rate Notifications, Sep 2025 | 40% luxury/sin | 18% standard | 5% merit | 0% nil-rated |
GST added on ₹10,000 GST 2.0 main slabs | ₹4,000 | ₹1,800 | ₹500 | ₹0 |
Total invoice (₹10,000 base) GST 2.0 main slabs | ₹14,000 | ₹11,800 | ₹10,500 | ₹10,000 |
Special rates (lower = lighter) CBIC GST Rate Notifications, Sep 2025 | 28% legacy +cess | 12% legacy | 3% gold | 0.25% diamonds |
Comparison
Calcrux vs ClearTax vs Zoho
| Feature | Calcrux (Free) | ClearTax | Zoho |
|---|---|---|---|
| Add & remove GST (inclusive/exclusive) | |||
| CGST / SGST / IGST split | |||
| Current GST 2.0 rates + legacy flagging | |||
| Compensation cess support | |||
| Reverse charge (RCM) awareness | |||
| Effective tax-rate breakdown | |||
| Smart insights & worked examples | |||
| Free, no sign-up required |
Common Mistakes
GST Calculation Mistakes That Cost You
Using the old 12% or 28% slab out of habit
Why it matters
GST 2.0 (September 2025) removed 12% and 28% as main slabs. Most goods there moved to 5%, 18%, or 40%. Charging an outdated rate means wrong invoices, mismatched GSTR filings, and unhappy customers or notices.
Fix
Use the current rate from this calculator — it flags 12% and 28% as legacy. When in doubt, confirm your product’s HSN code on the CBIC rate finder.
Calculating reverse GST by simply subtracting the rate
Why it matters
To remove 18% GST, people often do amount × 0.18, which is wrong because the amount already includes the tax. On ₹11,800 that gives ₹2,124 instead of the correct ₹1,800 — an error of ₹324.
Fix
Reverse GST divides by (1 + rate): ₹11,800 ÷ 1.18 = ₹10,000 base. Choose "GST-inclusive — remove GST" and the tool applies the correct formula.
Charging IGST on an intra-state sale (or vice-versa)
Why it matters
Putting IGST on a same-state invoice — or splitting CGST/SGST on an inter-state one — is a classic error. It leads to wrong tax credits for your buyer and reconciliation problems at filing time.
Fix
Decide by place of supply: same state = CGST + SGST; different state or import = IGST. Set "Type of supply" correctly and the calculator handles the split.
Forgetting compensation cess on demerit goods
Why it matters
Tobacco, pan masala, aerated drinks, and some vehicles carry compensation cess over and above GST. Quoting only the GST understates the price and your tax liability, sometimes by a large margin.
Fix
Enter the cess percentage in the advanced section. The calculator adds it to the invoice and shows your true effective tax rate.
Treating an MRP as a GST-exclusive price
Why it matters
MRP is GST-inclusive by law. If you add GST again on top of an MRP, you double-tax the item and overcharge the customer — a compliance and trust problem.
Fix
For an MRP or any tax-inclusive figure, select "GST-inclusive — remove GST". The tool extracts the base value and the embedded GST.
Ignoring the 3% special rate on gold
Why it matters
Jewellers sometimes apply the standard rate to gold value or forget that making charges are taxed separately. Gold value is 3%; making charges are 5% — applying one rate to both is incorrect.
Fix
Use the 3% rate for the metal value, and calculate making charges at 5% separately. This keeps your jewellery invoice compliant.
Pro Tips
Get GST Right Every Time
Confirm the HSN code first
The single biggest source of GST errors is the wrong rate. Look up your product’s HSN (goods) or SAC (services) code on the CBIC rate finder before invoicing — a handful of goods carry special rates that differ from the main slabs.
Show CGST and SGST as separate lines
GST law requires intra-state invoices to itemise CGST and SGST separately, not as a combined "GST" line. This calculator gives you both halves so your invoice is compliant out of the box.
Use reverse GST to set inclusive prices
If you want a round customer-facing price (say ₹999 all-inclusive), use remove-GST mode to find the base value and the tax inside it. It makes pricing and margin planning far cleaner.
Layer cess for sin goods
For tobacco, aerated drinks, or luxury vehicles, always add the compensation cess. The effective-rate output then shows the real tax burden, which can be far above the headline GST rate.
Re-check rates after every GST Council meeting
GST rates change at Council meetings. After GST 2.0, expect periodic tweaks. Bookmark this tool — the rate list is kept current so you are never invoicing on a stale slab.
Who Uses This
Who Uses This GST Calculator
The GST Calculator works across every stage of the workflow.
Small business owners raising invoices
A trader needs to add 18% GST to a quote and show the CGST/SGST split correctly on the invoice. They enter the amount, pick the rate and intra-state supply, and copy the exact tax lines.
Freelancers and consultants
A consultant billing a client in another state must charge IGST on their service fee. They use inter-state mode to get the single IGST line and the GST-inclusive total to quote.
Ecommerce sellers pricing products
A seller wants a clean ₹499 all-inclusive listing price. They use remove-GST mode to back out the base value and the embedded GST, then check their margin against cost.
Accountants and GST practitioners
A practitioner verifying a client’s invoices needs to confirm reverse-GST values and the correct split across many bills. The forward/reverse modes and effective-rate output speed up the check.
Jewellers and dealers in special-rate goods
A jeweller calculates 3% GST on gold value and 5% on making charges separately, and a tobacco dealer layers compensation cess on top of GST — both scenarios the calculator handles directly.
Glossary
Key GST Terms Explained
Every important term you'll encounter in this calculator and the broader topic.
- GST (Goods and Services Tax)
- A single indirect tax on the supply of goods and services in India, replacing most earlier taxes like VAT, service tax, and excise. It is charged at the point of consumption and collected in stages along the supply chain.
- Taxable Value
- The base amount on which GST is charged — the price of goods or services excluding GST and any cess. All GST and cess are calculated as a percentage of this value.
- CGST
- Central GST — the central government’s share of GST on an intra-state (same-state) supply. It is half of the total GST rate; the other half is SGST.
- SGST / UTGST
- State GST (or Union Territory GST) — the state’s share of GST on an intra-state supply, equal to CGST. Together CGST and SGST make up the full GST on a same-state sale.
- IGST
- Integrated GST — the single tax charged on inter-state supplies and imports, at the full GST rate. It is collected by the central government and shared with the destination state.
- Compensation Cess
- An additional levy on certain demerit and luxury goods (tobacco, aerated drinks, some vehicles), charged on the taxable value over and above GST. Rates vary by product.
- Reverse Charge Mechanism (RCM)
- A rule where the recipient of specified goods or services pays GST directly to the government instead of the supplier. The recipient can usually claim it back as input tax credit.
- Input Tax Credit (ITC)
- The GST you have already paid on business purchases and expenses, which you can set off against the GST you collect on sales. ITC offsets output GST only — not compensation cess.
- Net GST Payable
- The GST you actually deposit with the government — output GST on sales minus your input tax credit. If credit exceeds output GST, the surplus carries forward to the next return period.
- GST 2.0
- The September 2025 GST rate reform that rationalised the old 5/12/18/28 structure into two main slabs (5% and 18%) plus a 40% rate for luxury and sin goods, effective 22 September 2025.
- HSN / SAC Code
- Harmonised System of Nomenclature (HSN) codes classify goods, and Service Accounting Codes (SAC) classify services. Each code maps to a specific GST rate, used to determine the correct tax on an item.
Help & answers
Frequently asked questions
Everything you need to know about how the GST Calculator works.
01What is a GST calculator?
A GST calculator works out the Goods and Services Tax on any amount in India. Enter a price, pick a GST rate (5%, 18%, 40%, etc.), and it shows the GST amount, the CGST/SGST or IGST split, and the total invoice value. It also works in reverse — remove GST from a GST-inclusive price to find the base value.
02How do I calculate GST on an amount?
To add GST: GST = amount × rate ÷ 100, and total = amount + GST. For example, 18% GST on ₹10,000 is ₹1,800, so the total is ₹11,800. To remove GST from a GST-inclusive price: base value = amount ÷ (1 + rate ÷ 100). This calculator does both automatically — just choose "add GST" or "remove GST".
03How do I calculate reverse GST (remove GST from a total)?
Reverse GST extracts the base price and tax from a GST-inclusive amount. The formula is: taxable value = total ÷ (1 + GST rate ÷ 100). For a ₹11,800 GST-inclusive price at 18%, the base value is ₹11,800 ÷ 1.18 = ₹10,000 and the GST is ₹1,800. Select "GST-inclusive — remove GST" as the amount type to do this.
04What are the current GST slabs in India for 2026?
After the GST 2.0 reform (effective 22 September 2025), the main slabs are 0% (nil-rated), 5% (merit rate for essentials), and 18% (standard rate for most goods and services), plus a 40% rate for luxury and sin goods. The old 12% and 28% slabs were largely removed and now apply only to a few specific goods.
05What is the difference between CGST, SGST and IGST?
On a sale within the same state (intra-state), GST is split equally into CGST (collected by the central government) and SGST (collected by the state) — so 18% becomes 9% CGST + 9% SGST. On a sale between two states (inter-state) or an import, the whole tax is a single IGST collected by the centre and shared with the destination state.
06How is GST calculated on inter-state sales?
Inter-state supplies attract IGST at the full GST rate — there is no CGST/SGST split. For an ₹10,000 inter-state sale at 18%, IGST is ₹1,800 (the entire GST), and the invoice total is ₹11,800. Set "Type of supply" to "Inter-state / import — IGST" and the calculator routes the full tax to IGST.
07What is GST-inclusive vs GST-exclusive pricing?
A GST-exclusive price is the base value before tax — GST is added on top. A GST-inclusive price already contains the GST (an MRP is usually inclusive). With an inclusive price you work backwards to find how much of it is the base value and how much is tax. This calculator handles both with one toggle.
08Does this calculator use the new GST 2.0 rates?
Yes. The rate list reflects the GST 2.0 structure effective 22 September 2025 — 0%, 5%, 18% and 40% as the main rates, with the special 0.25% (rough diamonds) and 3% (gold) rates retained. It also flags 12% and 28% as legacy rates that now apply only to specific goods, so you do not accidentally use an outdated slab.
09What is the GST rate on gold?
Gold, silver and jewellery are taxed at a special 3% GST rate (1.5% CGST + 1.5% SGST intra-state, or 3% IGST inter-state) on the value of the metal. Making charges on jewellery are taxed separately at 5%. Select the "3% — Gold, silver & jewellery" rate for the metal value.
10What is compensation cess and when does it apply?
Compensation cess is an extra levy on certain demerit goods — tobacco, pan masala, aerated drinks, and some vehicles — charged on the taxable value over and above GST. Rates vary by product. Enter the cess percentage in the advanced section and the calculator adds it to the invoice and shows your effective tax rate.
11What is reverse charge (RCM) under GST?
Under the reverse charge mechanism, the recipient of certain goods or services pays GST directly to the government instead of the supplier. The GST amount itself does not change — only who deposits it. The supplier raises the invoice without collecting GST, and the recipient can usually claim it back as input tax credit. Toggle "Reverse charge applies" to flag this.
12How do I calculate net GST payable after input tax credit?
Net GST payable = output GST − input tax credit (ITC). Subtract the GST you paid on purchases from the GST you collected on sales; the difference is what you deposit. For example, ₹1,800 output GST minus ₹1,100 ITC means ₹700 net payable. Enter your ITC in the advanced section to see this. If ITC exceeds output GST, the surplus carries forward.
13Is GST calculated on profit or the total selling price?
GST is charged on the full selling price, not just your profit. The selling price already includes your profit margin, and GST applies to that whole amount. You only effectively pay tax on the value you add, because input tax credit refunds the GST on your purchases. The exception is the margin scheme for second-hand goods, where GST applies only to the dealer's margin.
14Is this GST calculator free and accurate?
Yes — it is completely free, needs no sign-up, and runs entirely in your browser. The rates follow the CBIC GST 2.0 notifications effective 22 September 2025, and the math (forward, reverse, CGST/SGST/IGST split, cess) matches the statutory method. For the exact rate on a specific product, always confirm the HSN/SAC code, as a handful of goods carry special rates.
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freelance gst
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Topics
gst calculatorgst calculator indiareverse gst calculatorgst calculationcgst sgst calculatorigst calculatornet gst payable calculatorremove gst calculatorgst inclusive calculatorgst exclusive calculatorgst 2.0 ratesgst rate calculator india
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