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GST Calculator Online India 2026

GST is a percentage of taxable value. An exclusive price adds tax on top, while an inclusive price already contains tax. The split shows CGST and SGST for intra-state supply, or IGST for inter-state supply.

⚠️ Disclaimer: This calculator provides approximate GST computations for general reference. Actual GST rates vary by product/service (HSN/SAC code). This tool is for assumption & planning purposes only. Always verify with the official GST portal or a CA before filing.
₹
%

Disclaimer: This tool provides estimated values for informational purposes only. Tax laws vary by jurisdiction. Please consult a qualified tax professional before filing.

Calculation Breakdown

Net Amount (Base Price)₹0.00
CGST (9%)₹0.00
SGST/UTGST (9%)₹0.00
Total Payable₹0.00

Grand Total Amount

₹0.00
Exclusive or inclusive mode
CGST, SGST, or IGST split
Invoice arithmetic only

GST on an invoice is the rate times the taxable value. An inter-state supply uses IGST. An intra-state supply splits the same rate into equal CGST and SGST amounts.

Financial & Tax Advice Disclaimer

This tool is provided strictly for educational, planning, and illustrative purposes. All figures, estimates, compounding formulas, and tax calculations are based on user input parameters and current mathematical models.

No Performance Guarantee & Liability: Output calculations do not guarantee future returns, exact bank interest payouts, market gains, or legal tax liability. Toolioz and its maintainers accept no legal or financial liability for investment losses, loan commitments, or tax penalties resulting from the use of this calculator.

Always consult a certified financial planner, registered investment advisor, or Chartered Accountant (CA) before taking financial action.

What this GST page calculates

Two invoice modes

  • Exclusive: Tax is amount × rate / 100. ₹1,000 at 18% is ₹180 of tax and a ₹1,180 total.
  • Inclusive: Base is total / (1 + rate / 100). Tax is total minus that base.
  • Intra-state split: The same ₹180 is shown as ₹90 CGST and ₹90 SGST.

Not a filing tool

  • No registration test: The page does not apply a turnover threshold or an e-commerce rule.
  • No composition scheme: It does not switch to a flat 1% or 6% rate.
  • No ITC or reverse charge: The result is the invoice arithmetic only.

How the two GST modes differ

Exclusive adds the rate on top of the amount. Inclusive extracts tax already included in the total.

Must-Know Terms

  • •CGST + SGST: Intra-state supply. Rate is split equally (e.g., 18% = 9% CGST + 9% SGST).
  • •IGST: Inter-state supply. Full rate is charged as IGST.
  • •HSN/SAC: This page does not look up a code or a penalty.
  • •Input tax credit: The result is not reduced by credit from another invoice.

What is not calculated

  • •Return dates: GSTR-1, GSTR-3B, and GSTR-9 due dates are not shown.
  • •Late fees: The page does not add a daily fee or 18% interest.
  • •Turnover tests: A ₹5 crore audit or e-invoice rule is not applied.
  • •Print: The button calls window.print(). It does not file a return.

Limits of the result

  • •One rate: The selected percent applies to the whole amount.
  • •Equal split: Intra-state CGST and SGST are each half of the tax.
  • •No cess: A compensation cess is not added.
  • •Checkbox only: The inter-state box chooses IGST or an equal CGST and SGST split. It does not look up a place of supply.
  • •Planning figure: The numbers are not a GST return.

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Frequently Asked Questions

For Exclusive amount: GST = Base Amount * Rate / 100. For Inclusive amount: GST = Total Amount - (Total Amount * 100 / (100 + Rate)).

CGST (Central GST) and SGST (State GST) apply to intra-state sales within the same state and are split equally 50/50. IGST (Integrated GST) applies to inter-state sales across state borders.

Input Tax Credit allows registered businesses to deduct the GST paid on purchases from the GST liability due on output sales, preventing double taxation.

Publisher notes · reviewed 10 September 2026

GST inclusive versus exclusive amounts

Indian GST is a tax on the taxable value at a notified rate for that supply. This page either adds GST to a base or backs GST out of a tax-inclusive total. It does not decide the HSN rate for a product.

The two directions

Exclusive: tax = base × rate/100, total = base + tax. Inclusive: base = total / (1 + rate/100), tax = total − base. Mixing them up is how invoices disagree with payment links. A ₹1,180 tax-inclusive amount at 18% has a base of ₹1,000, not ₹1,180 × 0.18.

Rates such as 5%, 12%, 18%, and 28% exist because the GST Council assigns goods and services to slabs. Using 18% on a 5% item is a classification error. Confirm the rate from the official tariff or a GST practitioner.

Worked examples

  • ₹2,500 exclusive at 18%

    Tax = ₹450, payable = ₹2,950. The same ₹2,950 inclusive at 18% reverses to a ₹2,500 base.

Limits of this page

  • No IGST/CGST/SGST split beyond a single rate box.
  • Composition scheme, RCM, and exemptions are not modelled.

Sources