VATCalculator UK

£45 plus VAT

£45 plus 20% VAT is £54. The standard-rate VAT on £45 is £9. Change the amount or rate in the calculator below.

Enter values above to calculate.

To add UK VAT, multiply the net amount by 1 + (rate ÷ 100). At the standard 20% rate that is × 1.20, so £45 × 1.20 = £54, of which £9 is VAT.

UK VAT rates: 20% standard (most goods and services), 5% reduced (domestic energy, children's car seats), 0% zero-rated (most food, books, children's clothes). Zero-rated still appears on VAT returns; exempt supplies (insurance, finance, education) do not.

How it works.

Formula: net × (1 + rate ÷ 100) = gross.

  1. Convert the rate: 20 ÷ 100 = 0.20.
  2. VAT amount: £45 × 0.20 = £9.
  3. Gross: £45 + £9 = £54 (or £45 × 1.20).
Worked examples
£45 + 20% VAT = £54 — the standard-rate VAT is £9, added on top of the £45 net price.
On a receipt — a £45 item shown ex-VAT rings up at £54 once 20% VAT is added at the till.
At the 5% reduced rate (domestic energy, children's car seats): £45 + 5% = £47.25, a VAT amount of £2.25.
Related: Remove VAT from £54 £40 plus VAT £50 plus VAT VAT amount tables
Sources: HMRC VAT rates · retrieved 2026-06-18.

Frequently asked questions

How much is 20% VAT on £45?
The VAT is £9. Multiply the net amount by 0.20: £45 × 0.20 = £9. Add it to the net price and the gross (VAT-inclusive) total is £54.
What is £45 plus VAT?
£54. To add standard-rate VAT, multiply by 1.20: £45 × 1.20 = £54. The 1.20 multiplier is the same as adding 20%.
What if the reduced 5% rate applies to £45?
Some supplies (domestic energy, children's car seats, some mobility aids) are charged at 5%, not 20%. At 5%, the VAT on £45 is £2.25 and the gross is £47.25.