The findings, from Prudential's Class of 2011 study, revealed that those delaying retirement this year for financial reasons, had, on average, hoped to stop working at age 62 but now expect to be 68 years old before they can finally take up their pension. The study, now in its fifth year, questioned people who had planned to retire during 2011.
Two fifths (40%) of those delaying retirement in 2011 due to the financial strain that it will create, believe that they will have to keep working until they are 70 years old, or older, in order to retire with a comfortable income.
Prudential's study shows that of all those planning to retire in 2011, 22% now say they can't afford to - a figure that has increased since 2010 when it was 15%. In addition, 16% of those planning to retire in 2011 do not want to quit working.
Vince Smith-Hughes, head of business development at Prudential said: "The only realistic option for those who want to avoid having to delay their planned retirement is to start saving as much as they can as early as they can.
"However, Prudential's research shows that people are postponing retirement to either build up their pension pots further or simply to continue in a job that they enjoy. When economic factors are combined with changes in legislation, such as the abolition of the Default Retirement Age and an increasing trend of choosing to continue at work, it is easy to understand why more people are postponing their retirement plans.
"Seeking professional financial advice is a prerequisite to securing the retirement income that people need and we recommend that those who are approaching their planned retirement age should speak to a financial adviser on at least an annual basis."