How do you work out VAT from a total price?

Divide the total by one plus the VAT rate as a decimal to get the net amount, then subtract that net amount from the total to get the VAT. On a 120 total at 20% VAT, 120 divided by 1.20 is 100 net, leaving 20 of VAT.

Why can't I just multiply the total by the VAT rate?

Because the rate applies to the net price, not the gross price that already contains the tax. Multiplying 120 by 20% gives 24, which overstates the true VAT of 20 by 20%. Always divide by one plus the rate first.

What is the difference between VAT and sales tax?

VAT is collected at each stage of production and is normally included in the advertised or invoiced price, so extracting it means working backward from the total. US sales tax is added on top of the sticker price only at the final sale to the consumer, so it is calculated forward rather than reversed out of a total.

What are the current UK VAT rates?

HMRC lists a 20% standard rate covering most goods and services, a 5% reduced rate for items such as domestic energy and children's car seats, and a 0% zero rate for most food and children's clothing. Which rate applies depends on the item, not the size of the sale.

Do all EU countries charge the same VAT rate?

No. The EU VAT Directive only sets a floor of 15% for the standard rate and leaves each member state to set its own figure above that, which is why standard rates across the EU currently range from the high teens to the high twenties depending on the country.

Does a business below the VAT threshold charge VAT?

No. A business that has not registered for VAT, typically because its turnover sits under the country's registration threshold, cannot legally charge VAT on its invoices, so there is no tax to extract from a gross figure it quotes.

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A VAT-inclusive price already has the tax baked into it, so pulling the tax back out means dividing by one plus the rate rather than multiplying. This calculator takes the gross figure on a receipt or invoice and splits it into the net value of the goods and the VAT the seller collected on the government's behalf, and it can also run the calculation the other way, adding VAT to a net figure to see what a customer is quoted.

Why dividing by the rate is the wrong instinct

The natural mistake is to take a 20% rate and simply multiply the gross price by 0.20 to find the tax. That overstates the VAT, because the 20% was charged on the net price, not on the gross price that already includes it. The correct divisor is one plus the rate as a decimal: gross divided by 1.20 gives the net amount, and the gross minus that net figure is the VAT actually contained.

On a 120 gross price at 20% VAT, the shortcut method wrongly reports 24 of tax, when the true figure is 20, because 100 net plus 20% VAT is exactly 120. The gap grows with the price, so relying on the multiply-by-the-rate habit on a large invoice can misstate the tax by a meaningful sum.

A quick sanity check for a 20% rate: the net amount is always five-sixths of the gross, and the VAT is always one-sixth. For a 5% rate, the VAT is one twenty-first of the gross. Keeping one of those fractions in your head catches an obviously wrong result before it reaches a return.

Three worked examples at different rates

A UK invoice for 850 at the standard 20% rate: net is 850 divided by 1.20, which is 708.33, and the VAT contained is 141.67. Rounding to the penny, those two figures still sum back to 850.00.

A Dutch or Spanish receipt for 2,400 at the 21% standard rate common across several EU states: net is 2,400 divided by 1.21, which comes to 1,983.47, leaving VAT of 416.53. Note how a single percentage point above the UK rate shifts nearly 21 more of every 120 gross into tax rather than net revenue.

A UK energy bill of 99.99 at the 5% reduced rate that applies to domestic fuel: net is 99.99 divided by 1.05, or 95.23, with VAT of 4.76. Running the same 99.99 at the standard 20% rate instead would give a VAT figure of 16.67, over three times as much, which shows how much a reduced-rate classification is worth on a recurring bill.

Adding VAT the other direction

When you are quoting a customer rather than reading a receipt, start from the net price and multiply by the rate to find the VAT to add, then sum the two for the gross. A net price of 500 at 20% adds 100 of VAT for a gross of 600; the same 500 at 21% adds 105 for a gross of 605.

This direction is the one a business uses when pricing an invoice, while the reverse-out direction is the one a bookkeeper uses when reconciling a bank statement that only shows the total that was paid. Mixing the two up is the single most common VAT-return error among small businesses doing their own books.

Multi-rate invoices need each line split before totalling. A single invoice with some standard-rated and some zero-rated items cannot have one blended rate applied to the whole total; each line has to be reverse-calculated individually and the VAT figures summed afterward.

Where the simple formula breaks down

This calculator assumes a single flat rate applied to the whole amount. Real invoices frequently mix rates: a UK supermarket receipt might combine zero-rated food, standard-rated household goods and reduced-rate items in one basket total, and no single divisor recovers the correct VAT from that combined figure without the itemised breakdown.

It also assumes the amount entered has VAT correctly charged on it in the first place. Businesses below the VAT registration threshold do not charge VAT at all, so an invoice from an unregistered supplier has no VAT to extract even if the seller has rounded the price to look VAT-inclusive.

Cross-border and digital-service transactions can involve VAT charged in the buyer's country rather than the seller's, under the EU's One Stop Shop scheme, or no VAT at all on qualifying exports. A gross figure quoted on an international invoice should be checked against the applicable jurisdiction's rate before assuming this single-rate formula applies.

Rate differences and registration thresholds

The UK standard VAT rate is 20%, with a 5% reduced rate on items such as domestic energy and a 0% rate on most food and children's clothing, according to HMRC's published VAT rates guidance. Businesses must register once their taxable turnover passes the current threshold, and unregistered traders should not be charging VAT on their invoices at all.

EU member states each set their own standard rate within a floor set by the VAT Directive, which requires a standard rate of at least 15%, so the rate on an invoice from Germany, France or Hungary can differ by more than ten percentage points even though all three are charging the same category of tax. Always check the rate printed on the specific invoice rather than assuming a single EU-wide figure.

In the United States there is no VAT; sales tax is charged separately on top of the sticker price at the point of sale rather than embedded in an advertised price, so this reverse-calculation approach does not apply to a US receipt in the same way. A US shopper comparing prices with a VAT country needs the sales tax calculator instead, not this one.

Frequently asked questions

How do you work out VAT from a total price?: Divide the total by one plus the VAT rate as a decimal to get the net amount, then subtract that net amount from the total to get the VAT. On a 120 total at 20% VAT, 120 divided by 1.20 is 100 net, leaving 20 of VAT.
Why can't I just multiply the total by the VAT rate?: Because the rate applies to the net price, not the gross price that already contains the tax. Multiplying 120 by 20% gives 24, which overstates the true VAT of 20 by 20%. Always divide by one plus the rate first.
What is the difference between VAT and sales tax?: VAT is collected at each stage of production and is normally included in the advertised or invoiced price, so extracting it means working backward from the total. US sales tax is added on top of the sticker price only at the final sale to the consumer, so it is calculated forward rather than reversed out of a total.
What are the current UK VAT rates?: HMRC lists a 20% standard rate covering most goods and services, a 5% reduced rate for items such as domestic energy and children's car seats, and a 0% zero rate for most food and children's clothing. Which rate applies depends on the item, not the size of the sale.
Do all EU countries charge the same VAT rate?: No. The EU VAT Directive only sets a floor of 15% for the standard rate and leaves each member state to set its own figure above that, which is why standard rates across the EU currently range from the high teens to the high twenties depending on the country.
Does a business below the VAT threshold charge VAT?: No. A business that has not registered for VAT, typically because its turnover sits under the country's registration threshold, cannot legally charge VAT on its invoices, so there is no tax to extract from a gross figure it quotes.

Sources

HMRC — VAT rates — Confirms the UK standard rate of 20%, reduced rate of 5% and zero rate of 0% as currently published by HMRC.
European Commission — VAT rates — Explains that the EU VAT Directive sets a floor of 15% for the standard rate while leaving the exact level to each member state.

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