UK life expectancies have risen dramatically in the last eight years, with a 65-year-old man now living more than three years longer, a report says.
Longer lifespans increases pressure on state and private pensions
The Actuarial Profession finding stems from the fact the chance of dying at 65 fell by about a third in that time.
But the report said it was not possible to predict whether life expectancy rises would continue at the same pace.
Its figures were also based on people with life insurance, who tend to have above average incomes and lifespans.
The Actuarial Profession reported that a 65-year-old man was now expected to live three-and-a-half years longer than he was eight years ago.
BBC personal finance reporter Richard Scott said: "Living longer is one of the main reasons for the pensions crisis.
"If people retire at the same age it means longer is spent in retirement, which puts more pressure on both state and private pensions."