A decade ago an Australian man who had just turned 50 could expect to live another 29.9 years. Today the official figure is 32 years. Even the past year has made an enormous difference. A year ago a man turning 50 could officially expect an extra 31.7 rather than 32 years.

The extraordinary jump in longevity detailed in the new Bureau of Statistics life tables is playing havoc with Australia's superannuation system. People who get their super in a lump sum are increasingly likely to exhaust it before they die, and even those who take it out gradually at recommended rates are facing the same fate.

Michael Sherris, professor of actuarial studies at the University of NSW, says that financial planners do not understand the risk.

''They'll sell people what they call superannuation accounts because they let people draw down what they need, but they typically last 15, maybe 20 years. While 20 years is what the tables say retirees have left, longevity is improving all the time in a way not fully recognised in the tables and there's enormous variability about the central figure.''

The life tables released on Thursday say a girl born today can expect to live 84.2 years and a boy 79.7 years, but if they survive the first few relatively dangerous decades the figures are higher.

Professor Sherris says generational changes and improvements in medicine mean a girl born today is quite likely to live to 100, with about half the girls born this year likely to live beyond 100.

''When their super runs out these people fall back on the pension. For some it's a sudden drop in income. But they won't buy lifetime annuities - so-called longevity insurance - in part because the annual income it gives them is small.''

Jeremy Cooper, who chaired the government's inquiry into superannuation in 2010, is now an executive at Challenger, which sells lifetime support. He says most people prefer the ''Holden Kingswood'' - a product that pays them what they want until it runs out.

''What the hell do you do when you turn 87?'' he asks. ''You are still spritely and you think you've been frugal, but the money's just not there. It isn't so bad for Australians who grew up during the war - they are used to hardship. But for the next wave of retirees it'll be an awful shock.''

Professor Sherris thinks one of the reasons Australians shy away from longevity insurance is that they get upset at the thought they might not live long enough to get what they could. ''It's an odd attitude. When we insure our cars we don't much mind if they are not damaged and we don't get a payout, but when we insure our lifetime income we seem to feel cheated if the insurance company keeps the money.''

The figures show men born in the ACT are likely to live much longer than those born elsewhere, with a boy born in Canberra facing an even chance of reaching 81 compared with 80.3 in Victoria and 79.8 in NSW. For women it is less marked: girls in most states are likely to live between 84 and 84.5 years.

Indigenous Australians are more than twice as likely to die at any age as non-indigenous. Australians in cities are the least likely to die, suffering only 5.6 deaths per 1000.