Add 20% VAT to a Net Price
Enter any net (ex-VAT) amount and add 20% UK VAT to get the gross price. The calculator shows the net, VAT, and gross amounts. Make sure the calculator is in 'Add VAT' mode.
Quick answer: £100 net + 20% VAT
Net (ex. VAT)
£100.00
VAT (20%)
£20.00
Gross (inc. VAT)
£120.00
For any other amount, use the calculator below (Add VAT mode).
Add or remove UK VAT at 20%, 5%, or zero rate — instantly shows net, VAT amount, and gross total.
After calculating, copy the result into your workflow instead of searching for the calculator again.
Calculate first, then reuse the result
After you calculate, UtilityPilot can turn the result into a clean note you can paste into your SOP, spreadsheet, CRM, Slack, Notion, checklist or email.
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Formula
Add VAT: Gross = Net × (1 + Rate ÷ 100)\nRemove VAT: Net = Gross ÷ (1 + Rate ÷ 100)
At 20%: Net × 1.20 = Gross; Gross ÷ 1.20 = Net. At 5%: Net × 1.05 = Gross; Gross ÷ 1.05 = Net. The VAT amount is always the difference between gross and net.
Worked Example
What is 100 plus VAT?
£100 net × 20% = £20.00 VAT → £120.00 gross
What is 165 plus VAT?
£165 net × 20% = £33.00 VAT → £198.00 gross
Adding VAT — B2B invoice:
A marketing agency quotes a client £4,500 net. The invoice must show the VAT-inclusive total.
£4,500 × 20% = £900.00 VAT → £5,400.00 gross
Removing VAT — retail receipt:
A business receipt shows £84.00 including 20% VAT. What is the net?
£84 ÷ 1.20 = £70.00 net • VAT = £14.00
Reduced rate (5%) — domestic energy:
A quarterly gas bill of £230 includes 5% VAT.
£230 ÷ 1.05 = £219.05 net • VAT (5%) = £10.95
Common Mistakes
- Subtracting 20% to remove VAT. £120 − 20% = £96, not £100. The correct method is £120 ÷ 1.20 = £100.
- Adding VAT twice. If a price is already VAT-inclusive, do not add VAT again. Use "Remove VAT" to verify first.
- Applying the wrong rate. Some goods qualify for the 5% reduced rate (domestic fuel, children's car seats) or 0% (most food, books).
Guide
How to Use
- 1
Select Add or Remove VAT
"Add VAT" for a net price that needs a gross total. "Remove VAT" to extract the net from a VAT-inclusive price.
- 2
Enter the amount
Type the price in pounds. The label shows which type you are entering.
- 3
Select the VAT rate
UK standard is 20%. Choose 5% for reduced rate goods, 0% for zero-rated, or enter a custom rate.
- 4
Review all three figures
Net, VAT amount, and gross are shown together. Copy them for invoices or records.
Next Steps
What to do next
FAQ
Frequently Asked Questions
Related by Workflow
Related by Region
The formula for adding 20% VAT
Gross = Net × 1.20
VAT amount = Net × 0.20
Common +20% VAT examples
| Net (ex. VAT) | VAT (20%) | Gross (inc. VAT) |
|---|---|---|
| £50 | £10.00 | £60.00 |
| £100 | £20.00 | £120.00 |
| £200 | £40.00 | £240.00 |
| £500 | £100.00 | £600.00 |
| £1,000 | £200.00 | £1,200.00 |
Use this in your workflow
After calculating, copy the VAT breakdown into your invoice template, quote, CRM, spreadsheet or Slack message using the Copy result summary button.
Common questions
How do I add 20% VAT to a price?
Multiply the net price by 1.20 to get the gross (VAT-inclusive) price. Example: £100 × 1.20 = £120. Alternatively, calculate 20% of £100 = £20, then add it: £100 + £20 = £120.
What is £100 plus 20% VAT?
£100 net + 20% VAT = £120 gross. The VAT amount is £20. To verify: £120 ÷ 1.20 = £100 net.
When do I need to add VAT to a price?
If you are VAT-registered in the UK and selling standard-rated goods or services, you must add 20% VAT to your net prices on invoices. Zero-rated and exempt supplies do not have VAT added.