How This VAT Calculator Works

Adding VAT is simple multiplication: VAT = net price × rate, and the gross price is net + VAT. Removing VAT from a gross price is the reverse — divide by (1 + rate), because the VAT is a percentage of the net price, not of the gross price. That is the mistake most people make: 20% VAT on a $120 gross price is $20, not $24.

Worked example: $100 excluding VAT at 20%. VAT = $100 × 0.20 = $20.00. Price including VAT = $120.00. Going the other way: $120 ÷ 1.20 = $100.00 net, so the VAT inside the $120 is $20.00.

Practical tips

Common VAT rates.

UK standard rate is 20% (reduced 5%, zero-rated essentials). EU standard rates range from 17% to 27%. The US has no VAT — it uses sales tax instead (see the Sales Tax Calculator).

Businesses reclaim VAT.

VAT-registered businesses charge VAT on sales and reclaim VAT on purchases, so VAT is usually a pass-through for them — the end consumer carries the cost.

Do not take 20% off the gross price.

Removing 20% VAT from $120 gives $96 — wrong. The right net price is $100. Always divide by 1.20, never multiply by 0.80.

Check the rate on the item.

Food, books, children's clothes and energy often carry reduced or zero rates. Using the standard rate on a zero-rated item overstates the tax.