VAT (Value Added Tax) is a percentage added to the price of most goods and services. Whether you're running a business, checking receipts, or working out prices, knowing how to calculate VAT is essential.
This guide explains how to calculate VAT step by step, including how to add VAT, remove VAT, and work with different VAT rates.
---What Is VAT?
VAT is a consumption tax applied to goods and services. In the UK, the standard VAT rate is typically 20%, although reduced rates such as 5% and 0% may apply to certain items.
When VAT is applied, it increases the total price paid by the customer.
---VAT Formula
There are two main VAT calculations:
1. Adding VAT:
Total Price = Net Price × (1 + VAT Rate)
2. Removing VAT:
Net Price = Total Price ÷ (1 + VAT Rate)
Always convert the VAT rate into a decimal. For example:
- 20% = 0.20
- 5% = 0.05
How to Add VAT
Example 1: Adding VAT to a Price
You have a product that costs £100 (excluding VAT). VAT is 20%.
Step 1: Convert VAT rate.
20% = 0.20
Step 2: Apply formula.
Total Price = 100 × (1 + 0.20)
Total Price = 100 × 1.20 = £120
The final price including VAT is £120.
---How to Remove VAT
Example 2: Removing VAT from a Price
You have a total price of £120 including VAT at 20%. You want to find the original price.
Step 1: Convert VAT rate.
20% = 0.20
Step 2: Apply formula.
Net Price = 120 ÷ 1.20 = £100
The original price before VAT is £100.
---How to Calculate the VAT Amount
If you want just the VAT amount:
VAT Amount = Total Price − Net Price
Using the example above:
VAT = £120 − £100 = £20
---Different VAT Rates
In the UK, common VAT rates include:
- 20% – Standard rate
- 5% – Reduced rate (e.g. some energy bills)
- 0% – Zero-rated goods (e.g. basic food items)
Always check which rate applies before calculating VAT.
---Why VAT Matters
VAT affects pricing, profit margins, and business cash flow. Businesses need to:
- Charge VAT on sales (if registered)
- Reclaim VAT on purchases
- Calculate VAT correctly for invoices
Incorrect VAT calculations can lead to pricing errors or tax issues.
---Use the VAT Calculator
To calculate VAT instantly, use our VAT Calculator.
You can also use the Percentage Calculator to work with VAT percentages, or the Discount Calculator when calculating final sale prices.
---Common VAT Mistakes
Forgetting to Convert Percentages
Always convert VAT rates into decimals before using formulas.
Adding VAT Twice
Check whether VAT is already included in the price before adding it again.
Using the Wrong Rate
Different goods and services have different VAT rates.
---Frequently Asked Questions
What is VAT?
VAT is a tax added to most goods and services.
How do I calculate VAT?
Multiply the net price by (1 + VAT rate).
How do I remove VAT from a price?
Divide the total price by (1 + VAT rate).
What is the UK VAT rate?
The standard rate is usually 20%.
---Conclusion
VAT is straightforward once you understand the formulas. You either multiply to add VAT or divide to remove it.
For quick calculations, use the VAT Calculator.