Online Capital Gains Tax Calculator - Allowable Costs

We're using the online CTG calculator to try and complete our return after selling a property. The majority of the fields ask for the full costs ie. purchase price and sale price. My husband and I have to submit individual returns and it's not clear whether the Allowable Costs calculation is the full amount we paid (eg conveyancing/agency fees) or our contribution. I cannot find any guidance notes online. For example, say our total cost for selling the property was £1500. Should we each put £1500 into the calculator, or should we each put £750 for our allowable costs because it is split 50/50. Please can you confirm because we want to ensure the return is completed correctly?

Hi Fiona,
If a jointly owned property, you will split all incme and costs 50/50.
Thank you.