VAT, GST & Sales Tax Calculator
Add tax to a net price or take it out of a gross one, at any rate, with the working shown.
- Calculated in your browser
- Formula and rounding
- Reviewed
Total including taxExample
$120.00
VAT at 20%: $20.00
- Net (before tax)
- $100.00
- VAT
- $20.00
- Gross (with tax)
- $120.00
Formula100.00 × 20% = 20.00; 100.00 + 20.00 = 120.00
Rate checked United Kingdom — standard 20%. Checked 2026-10-07. VAT rates on different goods and services · All rates
Add VAT: tax on the net amount, rounded to the minor unit
tax = round(net × r); gross = net + taxlines = 1rounding = line
= 20
Summary at 20%
Σ net, Σ tax, Σ grossnet = 100tax = 20
= 120
Totals
net + tax = grossnet = 100tax = 20
= 120
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Estimates for general information only — not financial, tax or legal advice. Your actual figures depend on your employer’s payroll, your full tax situation, your lender’s or bank’s terms and rules we may not model. Check official sources and speak to a qualified adviser before making decisions. Disclaimer · Report an error
How to add or remove VAT, GST or sales tax from a price
Prices are quoted two ways: before tax (net) or with tax included (gross). This calculator moves between them in either direction. It works for VAT in Europe, GST in Australia and New Zealand, HST and QST in Canada and sales tax in the US, at any rate you choose.
Pick a country or state rate, or type your own. Every rate in the picker comes from a tax authority source, and the full table, with sources and the date each rate was checked, is on the VAT and sales tax rates page.
- 1
Choose add or remove
Add tax to a net price, or remove it from a price that already includes tax. The labels switch to VAT, GST, HST or sales tax to match your choice.
- 2
Pick or type a rate
Choose a country, US state or Canadian province, or enter any rate up to three decimals. In the US, add your county or city rate on top of the state base rate.
- 3
Enter one amount or many
Type a single amount, or paste up to 200 lines from a spreadsheet. Choose rounding per line or on the total, then copy, export a CSV or print.
What this calculator does
- Add or remove VAT, GST, HST or sales tax
- Standard and common reduced rates for 60+ countries, each with a source
- US state base rates plus a field for your local rate
- Canadian GST, HST, PST and QST components
- Any custom rate from 0% to 100%, to 3 decimal places
- Batch mode for up to 200 lines, pasted from a spreadsheet
- Rounding per line or on the total
- Net, tax and gross per line, with a summary for each rate
- Copy, CSV export and print with the date and rate source
Five common cases, worked through
Net, tax and gross at a glance
| Case | Net | Tax | Gross |
|---|---|---|---|
| Add 20% VAT to 100.00 | 100.00 | 20.00 | 120.00 |
| Remove 20% VAT from 99.99 | 83.33 | 16.66 | 99.99 |
| Australian GST, 110.00 inclusive | 100.00 | 10.00 | 110.00 |
| Add 8.875% sales tax to 100.00 | 100.00 | 8.88 | 108.88 |
| Quebec: GST 5% + QST 9.975% on 100.00 | 100.00 | 5.00 + 9.98 | 114.98 |
Removing tax from 99.99 gives 99.99 ÷ 1.20 = 83.325, which rounds to 83.33. The tax is what’s left, 16.66, so net and tax add back to 99.99 exactly. At 8.875%, the tax of 8.875 rounds half up to 8.88. In Quebec, GST and QST are each charged on the pre-tax price, so QST is 9.975, rounded to 9.98.
How the tax is calculated
Adding tax: tax = net × rate and gross = net + tax. Removing tax: net = gross ÷ (1 + rate) and tax = gross − net.
Taking 20% of a gross price doesn’t remove 20% VAT. 20% of 120.00 is 24.00, but the VAT inside 120.00 is only 20.00. With Australia’s 10% GST, the tax in an inclusive price is one eleventh of it. The calculator uses exact decimals and rounds only at the end, as set out on the methodology page.
Rounding per line or on the total
Three items at 0.99 each, taxed at 20%, show why this matters. Rounded per line, each tax is 0.198 → 0.20, so the total tax is 0.60. Rounded on the total, 2.97 × 20% = 0.594 → 0.59. One cent apart.
Tax authorities set their own rules on which method an invoice may use. Check the rule that applies to you before you issue invoices.
US sales tax and Canadian provinces
The US has no national sales tax. States set a base rate and many counties and cities add their own. The picker holds state base rates only, because local rate data is typically sold under commercial licenses. Add your local rate in its own field and the two are combined.
Canada charges 5% GST everywhere. Some provinces combine it with their own tax as a single HST. Others charge a separate PST, and Quebec charges QST at 9.975% alongside GST.
Need a markup or a discount instead? Use the percentage calculator. For an invoice in another currency, the currency converter handles the conversion, and the income tax bracket calculator covers tax on income.
Good to know
- The rate table is sourced and dated: see VAT and sales tax rates for each rate’s authority and the date it was checked.
- Reduced rates, zero rates and exemptions depend on the item and the country. The picker shows the standard rate and common reduced rates only.
- US local sales tax rates aren’t stored. Add your county or city rate yourself.
- Registration thresholds, reverse charges and cross-border rules aren’t modeled.
- CSV exports neutralize cells that start with = + - or @, so a spreadsheet won’t run them as formulas.
What happens to the numbers you type
Your numbers stay in your browser. MoneyOtter works out your results on your device. We don’t send the amounts you type to our servers or store them. If you allow analytics, we record only broad ranges (for example “middle tax band”) to understand how the calculators are used. Like any website with ads, this page also loads advertising scripts; see our Privacy Policy.
The calculator is plain code running in this tab. It makes no network requests with your figures, and nothing is saved when you leave unless you choose to keep it. Read the privacy policy for how ads and analytics work on this site.
Related calculators and guides
Questions people ask
How do I remove VAT from a price?
Divide the gross price by 1 plus the rate. At 20%, 99.99 ÷ 1.20 = 83.33 net, and the VAT is the difference, 16.66.
How do I calculate GST in Australia?
GST is 10%. To add it, multiply by 1.10. To find the GST in an inclusive price, divide by 11: a 110.00 price includes 10.00 GST.
Why isn’t the VAT just 20% of the total price?
Because the rate applies to the net price, not the gross. The VAT inside 120.00 at 20% is 20.00, not 24.00. Use remove mode to get it right.
How is sales tax calculated in Quebec?
GST at 5% and QST at 9.975% are each charged on the pre-tax price. On 100.00 that’s 5.00 + 9.98, for a total of 114.98.
What sales tax rate applies in my US city?
Your total rate is the state base rate plus any county, city or district rates. Pick your state, then add the local part from your state’s revenue department.
Does rounding per line or on the total change the result?
It can, by a cent or so per invoice. Three lines of 0.99 at 20% give 0.60 tax per line but 0.59 on the total.
What’s the difference between VAT, GST and HST?
They’re all taxes on sales. VAT is the usual name in Europe and the UK, GST in Australia, New Zealand, Canada and India, and HST is Canada’s combined federal and provincial tax.
Sources and review
- European Commission — VAT rates
- GOV.UK (HMRC) — VAT rates on different goods and services
- Australian Taxation Office — GST, excise and indirect taxes
- Canada Revenue Agency — GST/HST rates and calculator
- Revenu Québec — Calculating the taxes (GST and QST)
Estimates for general information only — not financial, tax or legal advice. Your actual figures depend on your employer’s payroll, your full tax situation, your lender’s or bank’s terms and rules we may not model. Check official sources and speak to a qualified adviser before making decisions.
Page reviewed by the MoneyOtter team · Methodology · Changelog · Report an error