Though working Americans have different ideas on when to retire, many regard their 60s as the ideal time to exit the workforce permanently. But while the average retirement age in the U.S. today is 63, current members of the workforce may have to kiss the idea of retiring in their 60s goodbye. In fact, many are already resigned to the fact that they’ll need to work longer. A recent study by human resources consulting firm Willis Towers Watson reveals that almost 25% of Americans think they won’t be able to retire until age 70 or even later.