Capital gains tax (CGT) is payable when you sell an asset that has increased in value since you bought it. The rate varies based on a number of factors. For residential property it may be 18% or 28% of the gain.
Normally, when you sell your main home you don’t have to pay any CGT. However, in some circumstances you may have to pay some for example:
Unless held in a pension or Isa, you'll generally need to consider capital gains tax when selling shares, funds, or other financial products for a profit.