Delegates at the Brighton conference will argue today that as life expectancy increases and state and occupational pension ages rise, fewer workers enjoy a healthy retirement.
Officials will criticise the rise in the state pension age to 68 and warn that this could increase, forcing people to work longer.
The conference will press the TUC to co-ordinate campaigns against cuts in pensions and is expected to call for new research which can be used to show that "working longer means living less".
Calls will also be made for an independent commission into the state pension age and early retirement age.
Pensions will be a focus of marches being held on October 20 against the Government's austerity measures.
More top news
Alex Salmond found himself in a stand-off with airline staff after booking on to a flight under the name James Kirk.
Romelu Lukaku equalised to ensure Everton earned a point after Danny Ings had given Liverpool the lead in a heated derby clash.
Postman suspended as part of probe as hundreds of letters from a Black Country delivery office took two and a half years to arrive.