GST / VAT / Sales Tax Calculator: Add or Remove Tax

Add or remove GST, VAT or sales tax instantly. Rates for 50+ countries, all US states and Canadian provinces, India CGST/SGST/IGST split, multi-rate bills and reverse rate finder.

Built and maintained by Shehzad Munir ·

Estimates only, not financial, tax or investment advice. Results depend on the figures you enter and on rules that change; check with a qualified professional before making decisions.

GST / VAT / Sales Tax Calculator
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<a href="https://www.toolnova.org/finance-tools/gst-vat-sales-tax-calculator">GST / VAT / Sales Tax Calculator</a> by ToolNova

APA

ToolNova. (2026, October 5). GST / VAT / Sales Tax Calculator [Online tool]. https://www.toolnova.org/finance-tools/gst-vat-sales-tax-calculator

MLA

“GST / VAT / Sales Tax Calculator.” ToolNova, 5 Oct. 2026, www.toolnova.org/finance-tools/gst-vat-sales-tax-calculator.

How to add and remove tax

Add tax to a net price or remove it from a tax-inclusive total in one step. Pick from built-in rates for more than 50 countries, every US state plus your local rate, and every Canadian province (GST, PST, QST, HST). Indian GST splits automatically into CGST and SGST or IGST. Build a multi-item bill with different rates per line, or find the tax rate from a before-and-after price.

To add tax to a net price, multiply by the rate: tax = net × rate ÷ 100, and gross = net + tax. To remove tax from a price that already includes it, divide by one plus the rate: net = gross ÷ (1 + rate ÷ 100). A common mistake is to subtract the rate as a percentage of the gross price; removing 20% VAT from £120 gives £100, not £96.

Features

  • Add tax (exclusive) or remove tax (inclusive)
  • Standard and reduced rates for 50+ countries
  • All 50 US states + DC with city/county rate
  • Canada GST, PST, QST and HST by province
  • India GST slabs with CGST + SGST or IGST split
  • Multi-item bill with different rates and a tax summary
  • Reverse calculator: find the rate from two prices
  • Copy, print and share results

How to use GST / VAT / Sales Tax Calculator

  1. 1

    Choose your country or region

    Pick a country to load its rates. For the US choose a state and add your city or county rate; for Canada choose a province; for India choose same-state or other-state supply.

  2. 2

    Pick a rate

    Tap a standard or reduced rate, or type any custom rate including decimals.

  3. 3

    Add or remove tax

    Choose Add tax if your price excludes tax, or Remove tax if the price already includes it, then enter the amount.

  4. 4

    Read the breakdown

    See the net amount, tax (split into CGST/SGST, GST/PST or state/local where relevant) and the gross total, plus the same amount at every rate in that country.

  5. 5

    Use bill or reverse mode

    Build a multi-item bill with different rates per line, or enter a before- and after-tax price to find the rate charged.

Common use cases

  • A UK freelancer adds 20% VAT to an invoice amount.
  • An Indian shop owner removes 18% GST from an MRP and splits it into CGST and SGST.
  • A US online seller checks the combined state and local sales tax for an order.
  • A Canadian business works out GST + PST for British Columbia.
  • An accountant totals a bill with items at 5% and 18% GST.
  • A shopper finds out which tax rate was charged on a receipt.

Detailed guide

VAT and GST rates by country (2026)

Rates change, and most countries have reduced rates for food, books, medicine or transport. These are the standard rates built into the calculator; select a country to see its reduced rates too.

CountryTaxStandard rateReduced rates
United KingdomVAT20%5%, 0%
GermanyVAT19%7%
FranceVAT20%10%, 5.5%, 2.1%
IndiaGST18%5%, 40% (luxury), 3%, 0%
AustraliaGST10%0%
CanadaGST/HST5%–15%by province
UAEVAT5%0%
Saudi ArabiaVAT15%-
PakistanSales tax18%varies by province for services
SingaporeGST9%-

India GST: CGST, SGST and IGST

For a sale within the same state, GST is split equally between the central government (CGST) and the state (SGST or UTGST): 18% becomes 9% + 9%. For a sale to another state, the full rate is charged as IGST. Since the September 2025 GST reform the main slabs are 5% and 18%, with 40% on luxury and sin goods; the older 12% and 28% slabs are kept in the calculator for past invoices.

US sales tax and Canadian GST/PST/HST

US sales tax is set by states, and most cities and counties add their own rate, so the total depends on the delivery address. Five states (Alaska, Delaware, Montana, New Hampshire and Oregon) have no state sales tax. In Canada, Ontario and the Atlantic provinces charge a single harmonized HST of 13–15%, Quebec adds QST to the 5% GST, and British Columbia, Manitoba and Saskatchewan add a separate PST.

Create a GST or VAT invoiceWork out profit after tax and feesConvert prices between currencies

Frequently asked questions

How do I add VAT or GST to a price?

Multiply the net price by the rate and add it on: at 20%, 100 × 0.20 = 20 tax, so the total is 120. Choose Add tax, enter the amount and rate, and the calculator shows net, tax and gross.

How do I remove VAT or GST from a total?

Divide the total by 1 plus the rate. To remove 20% VAT from 120: 120 ÷ 1.20 = 100 net, so the VAT is 20. Choose Remove tax to do this automatically.

How do I calculate GST in India with CGST and SGST?

Select India and 'Same state'. The GST is split in half: on ₹1,000 at 18%, GST is ₹180, made up of ₹90 CGST and ₹90 SGST. For a sale to another state, choose IGST and the full ₹180 is IGST.

What are the current GST rates in India?

After the 2025 reform, the main slabs are 5% for essentials and 18% as the standard rate, with 40% for luxury and sin goods, 3% for gold and silver and 0% for exempt items. Older 12% and 28% rates are available for past bills.

How do I calculate sales tax in the US?

Choose your state and add your city or county rate. For example, California's 7.25% state rate plus a typical 1.5% local rate makes 8.75%. Rates vary by ZIP code, so check your exact local rate.

What is HST in Canada?

The Harmonized Sales Tax combines the 5% federal GST with the provincial tax into one rate: 13% in Ontario, 14% in Nova Scotia and 15% in New Brunswick, Newfoundland and Labrador and PEI.

How do I calculate tax on a bill with different rates?

Use Multi-item bill mode. Give each line its own rate and the calculator shows a tax summary grouped by rate, with CGST/SGST or GST/PST split where relevant.

How can I find out what tax rate was charged?

Use Find rate. Enter the price before tax and after tax and the calculator shows the rate: 1,000 before and 1,180 after means 18%.

Why isn't removing 20% VAT the same as taking 20% off?

Because VAT is calculated on the net price, not the gross. Tax is 20% of the net, which is only 16.67% of the gross. Taking 20% off 120 gives 96, but the correct net is 100.

Is this calculator accurate for my business?

It uses the standard formulas and current published rates, but special rules apply to some goods and services. Check your local tax authority for compliance, and use the custom rate for anything not listed.

What tax rate should I use for my country?

This tool includes common presets, UK VAT 20%, Australia GST 10%, India GST 18%, Canada GST 5%, and more, but rates vary by product category and region. Use the custom rate field to match your exact local rate, and confirm with your local tax authority for compliance.

Is my financial data saved?

No. All calculations run entirely in your browser. Amounts and results are never uploaded, logged, or shared.

How do I remove VAT from a total?

Switch to reverse mode and enter the gross amount, the tool extracts the net price and the tax it contains using the correct formula.

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