UK cyber crime costs £27bn a year - government reportSo says BBC report here.
But not only is this figure often self -reported (so some under-reporting as report acknowledges) but also self-evaluating. So we discover late in the piece that the headline figure is made up thuswise.
'Intellectual property theft cost £9.2bn, industrial espionage £7.6bn, this was followed by extortion, which cost £2.2bn, and direct online theft, which cost business £1.3bn. Some £1bn was lost through theft of customer data.'
They mention old-fashioned bank robbery but in those you knew exactly how much you had lost - or said you did.
So the lowest figures likely to be more accurate with the higher figures plucked from the counter-factual air.