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GST calculator
Calculate Indian Goods and Services Tax (GST) for invoices, business billing, and retail purchases in your browser. All calculations run client-side with zero data uploaded. Switch between GST Exclusive (tax added to base) and GST Inclusive (tax extracted from total MRP), toggle between Intra-State (CGST + SGST) and Inter-State (IGST), and compare costs across standard 0%, 5%, 12%, 18%, and 28% slabs. Rates are illustrative.
Client-side GST calculation. All calculations run strictly in your browser. No financial amounts or numbers are transmitted or stored.
Presets:
₹
Pre-tax base value (tax will be added to this amount).
Buyer and seller in different states or Union Territories. Full tax collected as Integrated GST.
Base Net Amount
₹50,000.00
Pre-tax invoice subtotal
Total GST Tax (18%)
₹9,000.00
IGST ₹9,000.00
Total Gross Payable
₹59,000.00
Final payable invoice amount
Tax Component Breakdown
| Tax Component | Jurisdiction | Applied Rate | Tax Amount |
|---|---|---|---|
| IGST | Integrated Interstate | 18% | ₹9,000.00 |
| Total Tax Payable | ₹9,000.00 | ||
Rate Comparison Across Standard Indian Slabs
Comparing the same ₹50,000.00 exclusive amount across 0%, 5%, 12%, 18%, and 28% GST brackets.
| Slab Rate | Typical Goods / Services | Base Amount | Tax Amount | Final Total |
|---|---|---|---|---|
| 0% | Fresh milk, grains, unprocessed food | ₹50,000.00 | ₹0.00 | ₹50,000.00 |
| 5% | Apparel <₹1k, footwear, tea, medicines | ₹50,000.00 | ₹2,500.00 | ₹52,500.00 |
| 12% | Computers, processed foods, work contracts | ₹50,000.00 | ₹6,000.00 | ₹56,000.00 |
| 18% (Current) | IT services, banking, electronics, hair care | ₹50,000.00 | ₹9,000.00 | ₹59,000.00 |
| 28% | Motorcycles, automobiles, air conditioners | ₹50,000.00 | ₹14,000.00 | ₹64,000.00 |
Statutory Disclaimer
GST rates in India are determined by the GST Council under the Central Goods and Services Tax Act, 2017. Rates, exemptions, and reverse charge mechanisms vary by Harmonized System of Nomenclature (HSN) and Service Accounting Code (SAC). These figures are illustrative simulations for planning purposes and do not constitute formal tax advice or an audit document. Consult a chartered accountant or visit cbic.gov.in for official notifications.
GST calculator example
Freelance invoice for ₹50,000 with 18% GST
Amount: ₹50,000, 18% GST Exclusive, Inter-state: Base net amount is ₹50,000.00, Integrated GST (IGST) is ₹9,000.00, and final invoice total is ₹59,000.00.
GST calculator how-to
- Enter the amount as exclusive (base) or inclusive (MRP / till total).
- Pick 0, 5, 12, 18, or 28%, or a custom rate.
- Choose intra-state (CGST+SGST) or inter-state (IGST).
- Copy the breakdown for an invoice draft, then confirm HSN/SAC on the official schedule.
Why GST calculator matters
Indian GST is the same inclusive/exclusive split as VAT, but intra-state invoices split the tax in two. Using the wrong jurisdiction on a draft invoice is a common spreadsheet error.
UK VAT is a single rate without CGST/SGST. Use the UK VAT calculator for GBP invoices.
Inclusive and exclusive GST
Exclusive: GST = net × rate/100; gross = net + GST. Inclusive: net = gross / (1 + rate/100); GST = gross − net. Intra-state: CGST = SGST = GST/2 (with a 1-paisa fix so the halves sum). Inter-state: IGST = GST.
GST calculator limitations
Illustrative slabs. Not a GSTR filing tool. Compensation cess is omitted.
Related guides
- GST inclusive vs exclusive (and UK VAT)
Same arithmetic as VAT. India then splits the tax for intra-state invoices.
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GST calculator FAQ
- What is the difference between GST inclusive and exclusive?
- GST Exclusive means the tax is added on top of the base price (Total = Base + Tax). GST Inclusive means the listed price already contains GST (Base = Total ÷ (1 + Tax Rate); Tax = Total − Base).
- How are CGST, SGST, and IGST applied?
- For intra-state transactions (within the same state), GST is split equally into Central GST (CGST) and State/UT GST (SGST). For inter-state transactions (buyer and seller in different states), the full tax is collected as Integrated GST (IGST).
- What are the standard GST tax slabs in India?
- The standard slabs under the Indian GST system are 0% (essential foodgrains, unprocessed items), 5% (packaged food, tea, apparel <₹1k), 12% (electronics, work contracts), 18% (most services, IT, financial, manufactured goods), and 28% (automobiles, luxury goods, air conditioners).
- Does this calculator upload my financial or invoice information?
- No. All arithmetic is calculated locally inside your browser tab using JavaScript. Plaintools never uploads, logs, or transmits your invoice figures.
- Is this calculator legal or official tax advice?
- No. Rates and classifications are illustrative. Actual GST applicability depends on HSN and SAC codes, composition schemes, reverse charge rules, and current CBIC notifications. Verify your invoice with a chartered accountant.
- How is reverse calculation for GST inclusive performed?
- Let G be the gross inclusive amount and r be the rate percentage. The net pre-tax amount is Net = G ÷ (1 + r / 100). The GST tax component is Tax = G − Net = G × r ÷ (100 + r).
- How do I calculate GST without this tool?
- For Exclusive: GST = Base × (Rate / 100); Gross = Base + GST. For Inclusive: Net = Gross ÷ (1 + Rate / 100); GST = Gross − Net. For intra-state, split GST by 2 for CGST and SGST. For inter-state, assign 100% of GST to IGST.