I think they do - I read somewhere else that if the maintenance is paid via CSA is carries more weight as more of a 'guarantee' of regular income. Some, not all, also take tax credits into a/c, although I was a bit alarmed when I remortgaged a couple of years ago that my broker was trying to get tax credits taken into a/c as if it was income, not money I didn't actually have to spend as it all went on child care costs. Maybe I misunderstood him, but that is what he seemed to be aiming for. It worked in the end as I got the mortgage, but with my deal now expired, the BS I am currently with would only lend me a third of what is now o/s.