If you want to retire by age 65, you should be setting aside 10-17 percent of your income. And that's if you start saving as early as age 25.
If you wait until 35 to start, you have to save 15 to 20 percent of your income to retire by 65. Keep in mind that this amount does not include your short-term savings, so it would be on top of any money you're putting in an emergency fund, for example.
Kathleen Elkins | CNBC