The number of people turning 65 in 2012 is predicted to be 806,000, representing a huge influx into the state pension system, according to the DWP.
This year 646,000 people will turn 65, adding 6,000 to the pool of people drawing state pensions.
In 2011 658,000 people will hit 65, an increase of 12,000. However, in 2012 this jumps to 806,000 people reaching the milestone age, an increase of around 150,000.
This increase will push DWP spending on pensioners to £4bn.
"People are now living longer, healthier lives and most 65-year-olds can expect to live until their late 80s," says pensions minister Steve Webb.
"State pensions need to reflect this and we need to make sure that the system is sustainable in the face of increasing longevity.
"We also want to make sure that where older workers want to keep working, they don't find themselves pushed out of the workplace or experience age discrimination."
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