Capital Gains Tax

[CarminaBiryani]

DF gifted 40k for a deposit just over 12 years ago. We are thinking of selling. The property has increases I'm value. Will I need to pay tax? DF is still alive.

*in

DF = dear father?

If the property has been your sole (main) residence for the entire time you have owned it then you will not pay any tax whatsoever when you sell it

A monetary gift from DF is utterly irrelevant on the (important) assumption DF does not own a share of the property and therefore has no gain from it.
As that gift was more than 7 years ago the 40K also falls outside of DF's estate when he dies and thus falls outside any inheritance tax liability on his death estate

Thank you. That's what I was reading online but wanted a second opinion.

Assuming it's your main residence then no, you won't pay capital gains.