Add VAT Calculator | Calculate VAT & VAT Inclusive Price Online

VAT Calculator UK

Add VAT Calculator

Quickly add VAT to any amount using UK VAT rates and calculate the final price including VAT. This beginner-friendly Add VAT Calculator helps you work out VAT amount, total cost, and VAT inclusive price in seconds.

Free Tool
UK VAT Rates
Instant Results

Calculate VAT Visit Homepage

Simple way to add VAT Use this calculator to add VAT to any amount and instantly see the VAT amount and final total.

What this tool does

What adding VAT means

Adding VAT means taking an original price before tax and applying a VAT percentage to find the final amount a customer pays. If a business sells a product or service with VAT, the VAT amount is added on top of the original price to create the VAT inclusive price.

This matters for invoices, quotes, budgets, and pricing decisions. Many businesses use an Add VAT Calculator because it is faster, clearer, and more accurate than doing manual calculations every time.

If you also need to work backwards from a total price, you can visit the Reverse VAT Online tool on our homepage or use our Remove VAT Calculator to take VAT out of an inclusive amount.

Why it matters

Why businesses add VAT

Products and services Invoices and quotes Pricing accuracy Fast VAT checks

To show the correct total customers need to pay.
To prepare accurate invoices and VAT records.
To avoid undercharging or overcharging.
To quickly calculate VAT using common UK VAT Rates.
To save time when comparing net and gross prices.

Step by step

How to use this Add VAT Calculator

Follow these simple steps to calculate VAT and get the final price including VAT.

Enter your original amount

Type the price before VAT in pounds. This is your starting amount.

Select the VAT rate

Choose 20%, 5%, 12.5%, or enter a custom rate if needed.

Click calculate

Press the button to calculate VAT instantly and confirm the numbers.

View your result

See the original amount, VAT amount, and total including VAT.

VAT formula

Simple formulas used in this calculator

This VAT Amount Calculator uses clear formulas so you can understand exactly how the result is worked out.

VAT Amount Formula

VAT Amount = Original Price × VAT Rate

Multiply the original amount by the VAT rate written as a decimal. For example, 20% becomes 0.20 and 5% becomes 0.05.

Total Including VAT Formula

Total Including VAT = Original Price + VAT Amount

Once the VAT amount is calculated, add it to the original price to get the final VAT inclusive price the customer pays.

Worked examples

Here are two quick examples to show how to Calculate VAT and the total including VAT.

Example 1

20% VAT

Original Amount£100.00

VAT Rate20%

VAT Amount£20.00

Total Price£120.00

Example 2

5% VAT

Original Amount£250.00

VAT Rate5%

VAT Amount£12.50

Total Price£262.50

Benefits

A good VAT Calculator Online should be simple, accurate, and fast for daily business use.

Saves time

Get instant VAT results without doing manual maths every time.

Reduces errors

Avoid common calculation mistakes when adding VAT to prices.

Helpful for businesses

Useful for shops, freelancers, agencies, and service providers.

Useful for invoices

Prepare clear invoice totals with the correct VAT amount included.

Pricing accuracy

Know the exact VAT inclusive price before sending quotes or selling.

Easy to use

Designed for beginners who want a quick and clear way to Add VAT.

FAQ

Frequently asked questions

Answers to common questions about VAT, adding VAT, and using this calculator.

What is VAT?

VAT stands for Value Added Tax. It is a tax added to many goods and services. When a business adds VAT, the customer pays the original price plus the VAT amount.

How do I add VAT to a price?

First, enter the original amount before VAT. Next, choose the VAT rate. Then the calculator works out the VAT amount and adds it to the original price to show the total including VAT.

How do I calculate 20% VAT?

Multiply the original amount by 0.20 to get the VAT amount. Then add that VAT amount to the original price. For example, £100 × 0.20 = £20 VAT, so the total becomes £120.

How do I calculate 5% VAT?

Multiply the original amount by 0.05 to find the VAT amount. Then add it to the original price. For example, £250 × 0.05 = £12.50 VAT, so the total becomes £262.50.

What is the UK VAT rate?

Common UK VAT rates include the standard 20% rate and a reduced 5% rate for some eligible goods and services. Some items may also be zero-rated depending on the category.

Is VAT included in the displayed total?

Yes. The total including VAT shown by this calculator is the full amount after VAT has been added to the original price.

Can businesses reclaim VAT?

In many cases, VAT-registered businesses may be able to reclaim eligible VAT on business purchases, depending on the rules that apply to their business and expenses.

Why is VAT important?

VAT affects selling prices, invoices, profit margins, and records. Getting VAT right helps businesses stay accurate and gives customers a clear final price.

Is this calculator free?

Yes. This Add VAT Calculator is free to use online and works on desktop and mobile devices.

How accurate is this calculator?

The calculator uses standard VAT formulas and rounds to two decimal places for currency display. It is suitable for general VAT calculations and quick checks.

Can I use a custom VAT rate?

Yes. Select the custom option in the VAT rate dropdown and enter the percentage you want to use. The calculator will then use that rate for the result.

Related tools

Useful VAT tools on our website

If you need to work backwards from a VAT-inclusive total or remove VAT from a price, explore these tools as well.

Reverse VAT Online

Need to extract VAT from a total amount? Use our main homepage tool to reverse calculate VAT and find the original pre-VAT price.

Open Tool

Remove VAT Calculator

Remove VAT from a VAT inclusive price and instantly see the net amount and tax portion using the same simple calculator style.

Open Tool

Guides

Helpful VAT articles and guides

Read more beginner-friendly content about VAT, rates, and reverse VAT calculations.

What Is Reverse VAT?

Learn what reverse VAT means and when you need to work backwards from a VAT-inclusive total.

UK VAT Rates

Understand common UK VAT rates and how they affect the final selling price of goods and services.

How to Remove VAT

Find out how to remove VAT from a total price and discover the original amount before tax.

Reverse Charge VAT

Explore the basics of reverse charge VAT and how it differs from standard VAT calculations.

Need More VAT Tools?

Explore our complete collection of VAT calculators and guides. Whether you want to add VAT, remove VAT, or reverse calculate a VAT inclusive price, we have simple tools to help.

Reverse VAT Online Remove VAT Calculator