When you retire at age 67 years of age you need to save from 15 to 25 percent of your paycheck each month to have a comfortable retirement at age 67 years old.
But if you plan to retire by age 40 years old you need to save up to 50 percent of your monthly paycheck to have a comfortable retirement at age 40 years old since you won't be able to collect your social security payments until age 62.
Keep in mind though too that the full retirement benefit age is 67.
So remember if yo plan to retire by 40 years old you need 50 percent of your paycheck saved each month.