Well, it turns out that working longer is indeed an option, according to the Employee Benefit Research Institute latest study. The only problem is that the latest research shows that you’ll have to work much longer than you anticipated. In fact, many Americans will have to keep on working well into their 70s and 80s to afford retirement, according to the study, titled “The Impact of Deferring Retirement Age on Retirement Income Adequacy.”

What’s more, it’s even worse for low-income workers, according Jack VanDerhei, one of the co-authors of the study. Those who earned (on average over the course of their careers) less than $11,700 per year, the lowest income quartile, would need to defer retirement till age 84 before 90% of those households would have just a 50% chance of affording retirement.