Six million people in their early 40s will have to work a year longer, as a result of a change in the State Pension Age, the government has announced.
The rise in the pension age to 68 will now happen in 2039, rather than in 2046 as was originally proposed.
Those affected are currently between the ages of 39 and 47.
The announcement was made by the Secretary of State for Work and Pensions, David Gauke.
He said the government had decided to accept the recommendations of the Cridland report, which proposed the change.