CGT - Jointly owned property - working out the gain

If two people buy a house jointly (50-50), but they both pay for individual capital expenses and one ends up paying for more than the other, can we work out the gain based on actual amount spent (on capital expenses) or would total (capital) expenses need to be split 50-50?

Hi llyD23 Dumont,

Capital Gains is calculated on beneficial ownership so if you were 50/50 joint owners then the Gain and allowable costs would be declared on a 50/50 basis.  

Thank you.