A client who is completing a self assessment owns a property jointly with his wife. He pays all the costs and wants to include this in his expenses for his self assessment (except for mortgage interest). His bank statements will support that he has paid these, but should he be only claiming half as expenses ?
If they own the house 50/50 then yes he should only claim 50% of expenses. If the house is solely in his name and the mortgage is in his name then he can claim 100%.
I expect it is 50/50, in which case he can only claim 50%, he probably thinks that because he is self-employed he can claim the lot and reduce his tax bill!