Money Matters

VAT Calculator: use now to add & remove VAT

Calculate VAT quickly and accurately with our free VAT calculator (estimator). Whether you’re adding VAT to a price or working out the VAT amount included in a total, this tool helps you make the calculation in seconds. It’s ideal for businesses, sole traders and anyone who needs a simple way to manage VAT calculations.

Published 17 August, 202614 min read Share

If you’re VAT registered, you usually need to charge VAT on your taxable supplies at the correct rate. Getting VAT wrong on an invoice can lead to HMRC queries, penalties, and awkward client conversations.

Once the correct VAT treatment has been identified, the calculation itself is usually straightforward: add VAT at the applicable rate to a net price or work backwards from a gross total. But mistakes can happen when switching between rates or reverse-calculating VAT that’s already included.

This guide includes a VAT calculator you can use to add or remove VAT using current UK rates. We also explain how the calculations work, outline the different  UK VAT rates, and cover common scenarios that cause confusion, so you can calculate VAT quickly once you know which treatment applies.

Key takeaways

• Understand whether you need to add VAT to a price or remove it from a VAT-inclusive amount.
• The UK uses different VAT rates depending on the goods or services being sold.
• To remove VAT correctly, work backwards from the VAT-inclusive price using the appropriate VAT rate.
• VAT-registered businesses must issue accurate VAT invoices and maintain VAT records.
• Making Tax Digital requires eligible businesses to keep VAT records digitally and submit returns using compatible software.

Here’s what the article covers:

VAT calculator (estimator) to add and remove VAT

The online VAT calculator (estimator) below can help you work out VAT in either direction, depending on the number you start with.

If you give the calculator a price before VAT, it will add VAT at the rate you choose and show you both the VAT amount and the total price with VAT.

The calculator can also work backwards. If you start with a total price that already includes VAT, the calculator shows you the VAT amount and the original price before VAT.

This is useful when you’re preparing invoices, checking supplier bills and receipts, or verifying figures before submitting your VAT return. The calculator uses current UK VAT rates and follows standard VAT calculation methods. It supports the arithmetic only — it can’t determine whether a supply is standard-rated, reduced-rated, zero-rated, exempt or outside the scope of VAT, so you’ll still need to confirm the correct VAT treatment first. It’s designed as a quick reference and not as a substitute for proper accounting records or professional advice.

* This calculator estimator applies the UK VAT rates in force as of July 2026 and is a general guide only. It does not determine the VAT treatment of a supply — confirm that with HMRC or a qualified accountant.

What are the VAT rates in the UK?

In the UK, VAT is charged at different rates depending on what you sell and, in some cases, how it’s supplied. The standard rate has been 20% since 4 January 2011, and before that it was 17.5% for nearly two decades. However, the VAT liabilities and reliefs that apply to specific goods and services can and do change. The uncertainty usually comes from working out which rate applies to a particular good or service.

The rules around VAT rates and how different goods and services are treated set out where the standard, reduced and zero rates apply. Where something isn’t specifically covered, the standard rate usually applies.

Standard VAT rate

The standard rate is 20% and applies to most goods and services in the UK. Any taxable item that doesn’t qualify for a reduced or zero rate falls under the standard rate.

This typically includes:

• Professional and consultancy services
• Most consumer goods
• Business services
• Digital products and subscriptions

When businesses talk about “charging VAT”, they are usually referring to VAT at the standard rate.

Reduced VAT rate

The reduced VAT rate is 5% and applies to a limited range of goods and services for specific policy reasons. Whether something qualifies depends on what’s being supplied and how.

Common examples include:

• Domestic fuel and power, including home utilities
• Some energy-saving materials installed in residential properties, where the detailed conditions are met
• Some mobility aids for older people

Because the reduced rate is more narrowly defined, it’s important to check the details rather than assume it applies.

Zero VAT rate

The zero rate of VAT is 0%. Zero-rated sales are still taxable for VAT purposes, even though no VAT is added to the price.

Common zero-rated items include:

• Many basic foods and drinks, subject to detailed rules and exceptions
• Children’s clothing and footwear
• Books, newspapers and magazines, subject to the relevant VAT rules
• Most passenger transport

You may also be able to zero rate qualifying goods you export from Great Britain to somewhere outside the UK, or from Northern Ireland to somewhere outside the UK and EU, provided the relevant conditions and evidence requirements are met. Zero rate means you still account for VAT on your invoices, but the rate is 0%.

If you’re VAT registered, zero-rated sales still count towards your taxable turnover and must be included on your VAT return.

Zero rating is not the same as being VAT-exempt or out of scope. Those categories follow different rules and can affect whether you can reclaim VAT on related costs.

Zero rating for items like most food, children’s clothing, and books has been part of the VAT system since its early years. Reduced rates have been applied more selectively, typically to domestic fuel and energy-saving materials. The list of qualifying items has changed over time, and the detailed rules continue to evolve.

How to work out VAT

Working out VAT starts with knowing whether the price you’re looking at already includes VAT or not.

If you’re adding VAT to a net price, you calculate VAT as a percentage of that amount. If you’re removing VAT from a total, you need to work backwards to find the net figure first.

Adding VAT to a price

When you’re preparing an invoice, you multiply the net price by the applicable rate to add the VAT.

Formula:

• 20% VAT rate: multiply by 1.20
• 5% VAT rate: multiply by 1.05
• 0% VAT rate: the price remains the same

The result in each case equals the total including VAT.

So if you’re charging £500 for a product or service at the standard rate, your calculation would be: £500 × 1.2 = £600

Your total for the VAT invoice would be £600: £500 is the net amount and £100 is VAT.

This method applies regardless of the VAT rate being used and follows the standard rules set out for how VAT works in practice.

Removing VAT from a total

Removing VAT is where mistakes tend to happen. If you have a total that already includes VAT, you can’t just take 20% off. That gives the wrong answer. You need to divide.

Formula:

• 20% VAT rate: divide the total by 1.20
• 5% VAT rate: divide the total by 1.05
• 0% VAT rate: the price remains the same

The result in each case equals the net price before VAT.

Formula: Total including VAT ÷ 1.2 = Net price

Say you’ve been invoiced £360 including VAT:

£360 ÷ 1.2 = £300

The net was £300, and the VAT in that total was £60.

Reverse VAT calculation matters when you’re checking supplier bills and receipts or working out how much you can reclaim. The VAT was worked out on the original net price, not the final total, which is why dividing works and subtracting doesn’t.

Zero rate sales

For zero-rated goods and services, VAT is charged at 0%. The net and total prices are the same, but the sale still counts as taxable for VAT purposes.

History of VAT rate changes in the UK

VAT has been part of the UK tax system for over 50 years. While the rules around VAT handling for businesses today are fairly settled, the standard rate has changed multiple times, usually in response to wider economic decisions.

VAT was introduced in the UK in 1973, when the UK joined the European Economic Community. It replaced Purchase Tax and Selective Employment Tax, which were seen as less consistent ways of taxing spending.

When VAT was first introduced in April 1973, most goods and services were charged at a single rate of 10%. Many essential items, like food, fuel and housing, were relieved from VAT rather than charged at the standard rate.

Between 1974 and 1991, the rate changed frequently as governments experimented with VAT as a fiscal tool:

• In 1974, the standard rate dropped to 8% and a higher rate of 25% was introduced for petrol and luxury goods
• In 1976, the higher rate was cut to 12.5%
• In 1979, the dual-rate system was abolished and the standard rate increased to 15%
• In 1991, the standard rate rose to 17.5%, where it remained for almost 20 years

For many businesses, the 17.5% rate became most closely associated with VAT and appeared consistently in pricing, contracts, and accounting records throughout the nineteen nineties and early two thousands.

Temporary reduction and move to 20%

During the 2008 financial crisis, the government temporarily reduced VAT to encourage consumer spending. From December 2008 to December 2009, the standard rate was cut from 17.5% to 15%. In January 2010, the rate returned to 17.5%.

One year later, on 4 January 2011, the standard rate increased to 20%. This remains the standard rate applied to most goods and services in the UK today.

How to apply VAT to invoices

If you’re VAT registered, your invoices must show VAT correctly. A proper VAT invoice tells customers how much VAT they paid and allows them to reclaim it if they’re VAT registered.

When you need to issue a VAT invoice

You must issue a VAT invoice when you supply taxable goods or services to another VAT-registered business. This applies to sales charged at the standard rate, reduced rate and zero rate.

VAT invoices must be issued within 30 days of the date of supply. For sales of £250 or less including VAT, you can issue a simplified VAT invoice instead of a full one.

A simplified VAT invoice must show:

• Your business name and address
• Your VAT registration number
• The time of supply (the tax point)
• A description of the goods or services supplied
• The total amount payable, including VAT
• For each rate of VAT chargeable, the gross amount payable including VAT
• The VAT rate applicable

Simplified invoices are commonly used for receipts and small retail transactions.

What a full VAT invoice must include

A full VAT invoice needs to show specific information. This isn’t optional, and missing details can cause problems later.

A full VAT invoice must include:

• A unique sequential number, based on one or more series, that identifies the invoice
• The time of supply (the tax point)
• The date of issue
• Your business name, address and VAT registration number
• Your customer’s name and address
• A description sufficient to identify the goods or services supplied
• For each description, the quantity of the goods or the extent of the services, the VAT rate, and the amount payable excluding VAT
• The unit price
• The gross total amount payable, excluding VAT
• The rate of any cash discount offered
• The total amount of VAT chargeable, expressed in sterling
• Where relevant, the reference or wording required for zero-rated, exempt, reverse charge or margin scheme supplies

If you charge more than one VAT rate on the same invoice, the invoice must make clear which items are subject to each rate and the VAT charged for each rate.

Showing VAT on invoices

When invoicing another business, prices are usually shown excluding VAT, with VAT added as a separate line. This makes it clear how much VAT has been charged and how much can be reclaimed.

For consumer sales, prices are often agreed inclusive of VAT. Even in those cases, if you issue a VAT invoice it still needs to show how much VAT is included in the total.

If you’re not VAT registered

If you’re not VAT registered, you must not charge VAT or show any amount as VAT on your invoices.

Some businesses choose to add a note to say they’re not VAT registered. This isn’t required, but it can help avoid confusion.

Keeping invoice records

You need to keep VAT records long enough to support the figures you submit and to allow HMRC to check older periods if needed.

That means keeping copies of the VAT invoices you issue and those you receive for at least six years, unless HMRC agrees a shorter period or another rule requires you to keep them for longer. This applies whether your records are paper-based, digital, or a combination of the two.

In practice, invoice records should make it clear:

• What was supplied
• When it was supplied
• The amount charged before VAT
• The VAT charged and the rate used

For purchases, records need to show that the VAT relates to business expenses and that the invoice supports the amount reclaimed.

Believe it or not, those records may come in handy long after you’ve sent in your return. You may need to review old invoices when you’re checking past VAT returns, reconciling your accounts across periods, or verifying how you handled specific transactions.

Any digital invoices must remain easy to read and access for the entire time they are kept. This includes electronic invoices, like PDFs or receipts from the web, which should be kept in a way that preserves the information needed to support your VAT records and VAT returns.

When you keep your records in order as you go, it makes it easier to handle VAT reviews and end-of-period checks, especially when the number of transactions goes up.

Using accounting software for VAT compliance

For VAT-registered businesses within Making Tax Digital, submitting a VAT return goes hand in hand with a set of digital record-keeping requirements, unless an exemption applies.

Making Tax Digital means that, where it applies, VAT figures need to come from digital records and be submitted using compatible software. For many small businesses, that has changed how VAT is handled in practice. Instead of being worked out at the end of the quarter, VAT is usually recorded as part of everyday bookkeeping.

Invoices, expenses, and adjustments are recorded as they happen, and the VAT return is built up from those records. When it’s time to submit, the figures are already there and can be reviewed before the return is sent.

This doesn’t remove the need to check your numbers, but it does reduce the amount of manual work involved and helps keep records consistent with current requirements.

If you want to manage VAT as part of your day-to-day accounts, Sage Accounting brings VAT records and VAT submissions together in one place, depending on the features included in your plan and how your business is set up.

VAT calculation FAQs

Who needs to register for VAT?

VAT registration is usually required once taxable turnover goes over £90,000 over a rolling 12-month period (in place since April 2024), and you can deregister if it drops below £88,000. You may also need to register if you expect your taxable turnover to go over £90,000 in the next 30 days alone.

That turnover includes standard-rated, reduced-rate, and zero-rated sales. It doesn’t include exempt or out-of-scope income.

Some businesses register before they reach the threshold. Whether that’s useful depends on how the business operates and who it sells to.

How do you register for VAT?

You register for VAT online through HMRC’s website, although the process can vary depending on your business type and circumstances. You’ll need your business details, recent turnover figures, and information about what you sell.

The process usually takes a few weeks. Once registration is complete, you’re issued a VAT registration number. From that point, you charge VAT on your sales, keep VAT records, and submit returns to HMRC.

The effective registration date determines when you must start charging VAT, which may be earlier than your application date.

When can you reclaim VAT on purchases?

VAT on purchases (input tax) can usually be reclaimed when the purchases are used for your taxable business activities, provided you’re VAT registered, the VAT was correctly charged, and you hold valid evidence, such as a VAT invoice.

It can’t normally be reclaimed for private spending, and some categories of spending, such as most business entertainment, may be restricted or blocked.

Where something is used partly for business and partly for private purposes, VAT recovery usually needs to be apportioned to reflect that split — for example, on the leasing of vehicles. Keep invoices and records that support the amounts you reclaim.

How do you reclaim VAT?

VAT is reclaimed through the VAT return.

The return sets the VAT charged on sales against the VAT paid on eligible purchases. If your reclaimable input VAT is more than the VAT you owe on your sales, HMRC may repay the difference. If the VAT due on your sales is more, the balance is paid with the VAT return.

You must keep records and VAT invoices in order to support the figures used.

How do discounts affect VAT?

VAT is based on what the customer actually pays.

If a discount is applied at the time of sale, VAT is worked out on the reduced amount. If a discount is applied later, for example, through a refund or credit note, the VAT position needs to be adjusted accordingly.

Do zero-rated sales still count?

Yes. Zero-rated sales still count as taxable turnover, even though VAT is charged at 0%.

If you’re VAT registered, they need to be included in your VAT records and VAT return. They can also affect whether VAT registration is required.

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