CGT on Sale of Rental Property - Bought with 1 Owner, Sold with 2 Owners.

Hi I am selling a property which I bought back in 2016 and was my main home. In 2018 I added my partner to the deeds along with a remortgage. So from May 2018 the property had 2 owners. In 2019 we left the property and let if out. In 2024 we sold the property. My question is - when calculating the gain for myself do I state the full 100 percent of the purchase price in 2016? As the CGT calculator asks for the price I paid for it, and also asks for the price I sold it for. When I bought it I paid 100 percent of it, and when I sold it I will split it with my partner 50/50. The calculator states that if the property has two owners I should put 50% of the sale price. I assume for my partner, they would just put 50 percent of the property value in 2018, then 50 percent of the sold price in 2024 - so this calculates it correctly. Along with a small PRR discount. Is this correct? I understand that both of us need to paid CGT.

Hi dan2024,
As you transferrred part of the ownership in 2018, you would need to report a gain from then based on the transfer, as such you will only account for the cost of the 50% purchase price now when selling.
Owner 2 should then use the value  when they acquired it - please note is it the market value and not necessarily the morgage price that you are using, for the gain in 2018.
You will need to submit a late return or amendment to delcare this - Tax when you sell property
Thank you.