Finance Tools
VAT Calculator
Work out VAT in both directions: add VAT to a net price, or strip it out of a gross price to find the net amount and the tax. Supports any rate, with the working shown.
Overview
Why use a free VAT calculator?
This free VAT calculator works in both directions. Add VAT to a net price to get the gross total a customer pays, or strip VAT out of a gross price to find the net amount and the tax inside it. Enter the figures and the answer appears as you type, with the arithmetic shown beside it.
The second direction is the one worth learning. Removing VAT is not the same as subtracting the percentage, and getting it wrong understates your revenue and overstates the tax you can reclaim. The calculator shows the formula it used precisely so you can check the result rather than take it on trust.
Any rate works, including reduced and zero rates, and there are presets for the standard rates people reach for most. Rates differ by country and by what you are selling, so the presets are a shortcut rather than a ruling: the correct rate for your situation is something to confirm with your own tax authority.
Nothing you type is sent anywhere. The whole calculation happens in your browser, which matters when the figure you are checking is a real invoice from a real customer.
Step by step
How to calculate VAT online
Choose a direction
Pick whether you are adding VAT to a net price or removing it from a gross price.
Enter the amount and rate
Type the amount and select or type the VAT rate that applies.
Read the breakdown
The net amount, VAT amount and gross total are shown together with the formula used.
What you get
- Add VAT to a net amount
- Remove VAT from a gross amount
- Any rate, including reduced and zero rates
- Common country rate presets
- Shows the formula so you can check the result
- Copy the breakdown in one click
Background
What is VAT?
VAT (value added tax) is a consumption tax charged as a percentage of a sale price. It is collected at each stage of a supply chain, with each business charging it on what it sells and reclaiming what it paid on its own purchases, so the tax ultimately falls on the final consumer rather than on the businesses in between.
That reclaim mechanism is why the arithmetic matters beyond the till. If you are VAT-registered, the VAT you charge is not your money. You are collecting it on behalf of the tax authority and will hand it over at the end of the period. Treating a gross figure as revenue is how a business ends up spending money it owes.
The most common practical question is how to work backwards from a price that already includes tax: a receipt showing a single total, a supplier invoice quoted gross, or your own pricing where you set the customer-facing figure first. That reverse calculation is a division, not a subtraction, and the difference grows with the rate.
Not to be confused with
- Sales tax
- US-style sales tax is charged once, at the final retail sale, and businesses buying for resale are generally exempt. VAT is charged at every stage with credit for tax already paid. The arithmetic on a single transaction looks similar, which is why the terms get used interchangeably, but the systems are not the same.
- GST
- Goods and services tax, used in Australia, Canada, India, New Zealand and elsewhere, works like VAT: charged through the supply chain with credits. The calculation here applies unchanged: only the rate and the name differ.
- Net and gross
- Net is the price before VAT; gross is the price including it. A quote to another business is usually stated net, while a price shown to a consumer is normally gross. Confusing the two is what makes a supplier's invoice arrive higher than the customer expected.
- Zero-rated and exempt
- Zero-rated supplies are taxable at 0%, so you can still reclaim VAT on related costs. Exempt supplies are outside the system and generally carry no reclaim. Both show as no tax on an invoice, and the difference only shows up on a return.
- The VAT fraction
- A shortcut for extracting tax from a gross figure: at 20% it is 1/6, because 20/120 simplifies to that. Multiplying a gross amount by 1/6 gives the VAT directly. It is the same operation this calculator performs, expressed as a fraction.
Reference
The two calculations, step by step
There are only two, and one of them is routinely done wrong. Both are shown below with a worked example at 20%, so you can follow the same steps by hand and check anything this calculator tells you.
Adding VAT: the formula
Multiply the net amount by the rate to get the tax, then add it on. Net × 20% = VAT, and net + VAT = gross. The one-step version is to multiply the net by 1.20, which gets you straight to the gross total.
Required
Adding VAT: a worked example
A net price of 500 at 20%: the VAT is 500 × 0.20 = 100, and the gross is 500 + 100 = 600. Equivalently 500 × 1.20 = 600. Both routes give the same answer, so use whichever you find easier to check.
Required
Removing VAT: the formula
Divide the gross amount by one plus the rate. At 20% that is gross ÷ 1.20 to get the net, then gross − net for the VAT. The division is the crucial part: the tax was calculated on the net figure, not on the gross one.
Required
Removing VAT: a worked example
A gross price of 600 at 20%: the net is 600 ÷ 1.20 = 500, and the VAT is 600 − 500 = 100. Subtracting 20% from 600 would give 480, which is wrong by 20, because 20% of 600 is not the tax that was actually charged.
Required
Why subtracting the percentage fails
Expressed as a share of the gross price, 20% VAT is 16.67%, not 20%. The rate is always quoted against the net figure, so applying it to the gross removes too much. The gap widens as the rate rises, and at 23% the error is larger still.
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Checking your answer
Multiply the net back up. If net × 1.20 does not return the original gross, the net is wrong. This one habit catches nearly every reverse-VAT error, and takes a few seconds.
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Rounding
Round once, at the end, and to the currency's smallest unit. Rounding intermediate figures is how a breakdown ends up disagreeing with its own total by a cent: this calculator derives one figure by subtraction so the parts always add up.
Optional
Multiple rates on one invoice
Where a sale mixes rates, calculate each band separately against its own net amount and add the results. Applying a blended rate to the whole invoice produces a figure that will not reconcile with either band.
Optional
Who it helps
Who can use this VAT calculator?
Freelancers and consultants
Clients often ask for a price and mean different things by it. Quoting net to a business and gross to a consumer, and being able to convert between the two in seconds, avoids the awkward follow-up where an invoice arrives 20% higher than someone expected.
Small businesses and retailers
If you set a customer-facing price first, every margin calculation starts by stripping VAT back out. Getting that reverse figure right is what makes the difference between a real margin and one that quietly includes tax you owe.
Bookkeepers and accountants
Reconstructing records from gross receipts means reversing VAT repeatedly, often at more than one rate. A calculator that shows its working is faster to check than a spreadsheet formula somebody else wrote.
Anyone checking a supplier invoice
When an invoice shows only a total, the reverse calculation tells you how much of it is reclaimable tax. It is also the quickest way to spot a supplier who has applied the wrong rate.
Contractors and trades
Materials and labour can carry different rates on the same job, and quoting a single gross figure hides that. Working out each band separately keeps the quote defensible and the eventual return accurate.
Anyone pricing for a new market
Selling into a country with a different standard rate changes your gross price even when your net stays the same. Switching the rate here shows immediately what a customer would actually pay.
Do it properly
Best practices
Divide to remove VAT, never subtract the percentage
Gross ÷ 1.20 at a 20% rate, not gross − 20%. The tax was calculated on the net amount, so the percentage does not apply to the gross figure. This single distinction is behind most reverse-VAT errors.
Multiply back up to check your answer
If net × 1.20 does not return the gross you started with, the net is wrong. It takes seconds and catches the mistake above every time, which makes it worth doing on anything that will end up on a return.
Be explicit about net or gross on every price
State which one you mean on quotes, invoices and price lists. Business customers usually expect net, consumers expect gross, and the ambiguity is a common cause of a disputed invoice.
Keep each rate in its own band
On an invoice mixing standard and reduced rates, calculate each band against its own net amount rather than applying an average. A blended rate produces a figure that reconciles with neither band on a return.
Round once, at the end
Work in the smallest currency unit and round the final figures rather than intermediate ones. Rounding at each step is how a breakdown stops adding up to its own total, which is exactly the error a tax inspector notices.
Remember the VAT you charge is not your money
It is collected on behalf of the tax authority and will be handed over at the end of the period. Treating gross receipts as revenue is a cash-flow problem that only becomes visible when the return is due.
Avoid these
Common mistakes
Subtracting 20% to remove VAT from a gross price
Divide by 1.20 instead. Subtracting 20% from 600 gives 480 when the correct net is 500, an error of 20 on a single line, repeated across every transaction handled the same way.
Treating gross receipts as revenue
Strip the VAT out before you look at income. The tax portion belongs to the tax authority and will leave the account at the end of the period, so counting it as revenue overstates both turnover and profit.
Quoting a net price to a consumer
Show consumers the gross price they will actually pay, and reserve net quoting for business customers who reclaim it. Consumer pricing rules in many countries require the inclusive figure to be the one displayed.
Applying one blended rate to a mixed invoice
Split the invoice into bands and calculate each against its own net amount. A blended rate produces a tax figure that matches neither band, and neither you nor your customer can reconcile it later.
Rounding at every step of a calculation
Keep the full precision until the final figure, then round once. Rounding intermediate values is what leaves a breakdown a cent or two away from its own total on longer documents.
Assuming the standard rate always applies
Check the rate for what you are actually selling. Food, books, children's clothing, energy and construction frequently carry reduced or zero rates, and the standard rate is simply the most common one rather than the default.
FAQ
Frequently asked questions
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