VAT Calculator

VAT (value‑added tax) is added as a percentage of a price — the UK standard rate is 20% — so you can add it to a net price or extract it from a gross one. Enter an amount and rate to calculate VAT either way.

Enter any two of VAT rate, net price, gross price or tax amount — the calculator works out the other two. Add, remove or reverse VAT at any rate, for any country. Works for GST too — it's VAT under another name.

Fill in any two boxes and press Calculate. Leave the two you want to find out blank.

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Provide any two. If you fill more, the order used is VAT rate → net → gross → tax.

How this VAT calculator works

VAT (value-added tax) is a percentage added to the net price of goods and services. This calculator links the four quantities — VAT rate, net price, gross price and tax amount — so any two you know define the other two.

The VAT formula

Add VAT: tax = net × rate ÷ 100, and gross = net + tax.

Remove VAT: net = gross ÷ (1 + rate ÷ 100), and tax = gross − net.

Find the rate: rate = tax ÷ net × 100.

Worked example

At a 20% rate on a $100 net price, the VAT is $100 × 0.20 = $20 and the gross price is $120. Working backwards, a $120 gross at 20% divides by 1.20 to give the $100 net and $20 VAT.

Because GST (goods and services tax) works exactly like VAT, you can use this tool for GST too — just enter your local rate.

Understanding VAT

What is VAT?

Value-added tax is an indirect consumption tax charged on the value a business adds to a product or service at each step of the supply chain — from raw materials through to the final sale. Each seller collects it and passes it on, but the end customer ultimately bears the cost. More than 160 countries levy some form of VAT, making it one of the largest sources of public revenue worldwide. Every country in the European Union must apply a standard rate of at least 15%, while the United States is the only major developed economy without a nationwide VAT — it relies on state and local sales tax instead.

VAT vs. sales tax

Both are consumer taxes added as a percentage of price, but they are collected differently. Sales tax is charged just once, at the final sale to the shopper. VAT is charged at every stage of production and distribution, yet businesses reclaim the VAT they paid on their own purchases, so only the value added at each step is actually taxed. That stage-by-stage paper trail makes VAT harder to evade — one reason so many countries favour it — while the total a customer pays at the same rate ends up broadly similar either way. If you need US sales tax specifically, use our sales tax calculator.

VAT, GST — different names, same idea

In several countries VAT goes by the name GST (goods and services tax), including Australia, Canada, India, New Zealand and Singapore. The mechanics are essentially identical: a percentage added along the supply chain and carried by the final consumer. Rates and coverage vary widely — many countries apply reduced or zero rates to essentials such as food, medicine and books, and a higher standard rate to everything else.

How VAT flows through the supply chain

Say the VAT rate is 20%. A timber supplier sells wood to a furniture maker for $100 plus $20 VAT, and remits that $20. The maker builds a chair and sells it to a shop for $250 plus $50 VAT — but reclaims the $20 already paid, so hands over $30. The shop sells the chair for $400 plus $80 VAT and, reclaiming the $50, remits another $30. The government collects $20 + $30 + $30 = $80 in total — exactly 20% of the final $400 price. Each business is taxed only on the value it added, and the shopper carries the full $80.

How to use it & key terms

Enter a net or gross price and your VAT rate, then press Calculate to add or remove VAT and see both figures side by side.

TermWhat it means
VAT (Value Added Tax)A consumption tax added at each stage of supply, common in the UK, EU and many countries.
Net priceThe price before VAT.
Gross priceThe price including VAT — what the customer actually pays.
VAT rateThe percentage charged (e.g. 20% standard in the UK; reduced and zero rates also exist).
Inclusive vs exclusiveWhether a quoted price already contains VAT or has it added on top.

VAT vs sales tax — the real difference

They raise money from consumption in opposite ways. US-style sales tax is charged once, at the final retail sale, and only the end customer pays it. VAT (called GST in some countries) is charged at every stage of the supply chain, but each business reclaims the tax it paid on its own inputs — so only the value added at each step is actually taxed. The customer still bears the full amount at the end; the collection is simply spread across the chain.

That design makes VAT largely self-policing, because each business has a paper trail and an incentive to document what it paid — one reason most of the world uses VAT or GST rather than a single-stage sales tax. It also shows up at the till: VAT is often quoted inclusive in the shelf price, while US sales tax is usually added on top at checkout. Knowing whether a quoted price already includes the tax is the key to reading any total correctly.

Sources & methodology

The calculator applies standard value-added-tax arithmetic: the tax amount is the net price multiplied by the rate, the gross price is the net plus the tax, and each value can be recovered from any two of the others. Removing VAT divides the gross by one plus the rate. Rates are set by each jurisdiction and entered by you.

Sources: Standard value-added-tax percentage arithmetic; statutory rates set by tax authorities such as HMRC (UK VAT) and the EU member states.

Zero-rated, exempt, and reclaiming VAT as a visitor

Not everything under a VAT system is taxed at the headline rate, and the categories are subtler than they first look. Goods and services are typically sorted into standard-rated, reduced-rated, zero-rated and exempt — and the last two are not the same thing, even though both mean no VAT reaches the customer. A zero-rated item is technically taxable at a rate of nothing, which still lets the seller reclaim the VAT on its own costs; an exempt item sits outside the system, so the seller cannot reclaim that input VAT. The difference is invisible on a receipt but significant to the business.

VAT also does not fall on every seller. Most systems set a registration threshold: a business whose turnover stays below it need not register or add VAT at all, which is why the smallest traders often quote prices with no tax component. Once a business grows past that threshold it must register, charge output VAT on its sales and reclaim the input VAT on its purchases, handing over only the difference. Registered businesses also issue VAT invoices, the paper trail that keeps the tax landing on the value each business adds rather than on the full price at every stage.

Because VAT is a tax on domestic consumption, visitors can sometimes step outside it. Many countries run a tax-free shopping scheme that lets travellers reclaim the VAT on goods they buy and carry home, on the logic that the item will be used abroad rather than locally. The refund usually requires proof of export at the border and applies to goods rather than services, but it can noticeably lower the cost of a large purchase made while travelling — the mirror image of the way imported goods are taxed when they arrive in a country.

For a single price the arithmetic above is all you need, but these rules explain why two similar items can carry different VAT, and why a business and a tourist experience the same tax so differently. Thresholds, rates and refund schemes differ from country to country, so treat the result here as an estimate and confirm the rate and category that apply to your purchase against current official guidance.

Frequently asked questions

How do I add VAT to a price?

Multiply the net price by 1 + rate/100. For example, $100 at 20% VAT becomes $100 × 1.20 = $120, so the VAT is $20.

How do I remove VAT from a gross price?

Divide the gross price by 1 + rate/100 to get the net price, then subtract to find the VAT. A $120 gross at 20% is $120 ÷ 1.20 = $100 net, with $20 VAT.

Can I enter any two of the four values?

Yes — enter any two of VAT rate, net price, gross price and tax amount and the calculator finds the rest. If you fill in more than two, it uses them in the order VAT rate, net price, gross price, tax amount.

How do I work out the VAT rate from net and gross prices?

Subtract the net from the gross to get the VAT, then divide by the net and multiply by 100. Gross $120 − net $100 = $20, and $20 ÷ $100 × 100 = 20%.

Is VAT calculated on the net or the gross price?

On the net (before-tax) price. The tax equals net × rate, and the gross is net + tax.

Does this calculator work for GST?

Yes. GST (goods and services tax) is VAT under another name — used in Australia, Canada, India, New Zealand and Singapore — so the same calculator works. Just enter your local GST rate.

How do I calculate 20% VAT?

Enter 20 as the rate and your net price. The tax is net × 0.20 and the gross is net × 1.20 — so $250 net gives $50 VAT and $300 gross.

What is the difference between net, gross and tax amount?

Net is the price before VAT, the tax amount is the VAT itself, and gross is the net plus the tax — the total paid.

What is the VAT formula?

To add VAT: VAT = net × rate ÷ 100, and gross = net + VAT. To work out VAT backwards from a gross price: net = gross ÷ (1 + rate ÷ 100), then VAT = gross − net. To find the rate: rate = VAT ÷ net × 100.

How do I calculate VAT backwards (reverse VAT)?

Enter the gross (VAT-inclusive) price and the VAT rate, then Calculate. The tool removes the VAT — dividing the gross by 1 + rate/100 to reveal the net (ex-VAT) price and the VAT amount. This is also called reverse or backward VAT.

Is VAT the same as US sales tax?

No. VAT is charged at every stage of the supply chain, with businesses reclaiming the VAT they pay, so the final consumer bears it. US sales tax is charged only once, at the final retail sale. The math for a single purchase is similar — for US sales tax specifically, use our sales tax calculator.

What do ‘ex VAT’ and ‘inc VAT’ mean?

Ex VAT (VAT exclusive) is the net price before VAT is added; inc VAT (VAT inclusive) is the gross price with VAT already in it. So a £100 ex VAT item at 20% is £120 inc VAT. Enter the net price to add VAT, or the gross price in reverse mode to strip it out and see the ex-VAT figure.