How the vat calculator works
Formula. Adding VAT: gross = net × (1 + rate). Removing VAT: net = gross ÷ (1 + rate), and VAT = gross − net.
Example. A price of 110 including 10% VAT is 100 net plus 10 VAT.
Tip. Never remove VAT by taking 10% off the gross price. 10% of 110 is 11, which overstates the tax.