How do you write excluding VAT?
If you can quote VAT-exclusive prices, these still need to be prominently accompanied by the rate or amount of VAT, for example “ex VAT@20%”.
Does VAT mean including?
VAT stands for "value added tax." It's similar to our sales tax in the U.S., although a good bit higher. When you see a price quoted as "VAT included," what you see should be what you pay, with no other tax added on.
Should VAT be added to the whole quote?
The ASA has ruled against many ads for quoting VAT-exclusive prices without marketers taking into account that not all of their customers did not have to pay VAT or were able to recover VAT. Therefore, if your customers are consumers, all prices you quote should include VAT.