Having a bit of a blonde moment here, but I've just upgraded to Sage Line 50 multicompany at a cost of £850, and I'm not sure whether I should treat it as an expense or a capital item. Obviously I intend to keep it for a few years and would normally capitalise such a large amount, but I'm always reluctant to capitalise software for my clients.
I generally set software costs against P&L expenses. However £850 is a lot to write off and you may struggle to convince the revenue it's not a capital item. Nevertheless if it was me I would still put it to the P&L.