Answer: Saving 10% for retirement is often considered a minimum for those who start saving in their 20s. The older you are when you begin, the more you’d need to save to match the nest egg you would have accumulated with an earlier start. That means saving 15% to 20% if you start in your 30s, 25% to 30% if you start in your 40s, and 40% of your income, or more, if you don’t start until your 50s.

Clearly, the wind is at your back when you start saving young. It starts blowing pretty hard in your face if you wait.

If you can’t carve out a huge chunk of your income for retirement, though, you shouldn’t despair. Save what you can, as anything you put aside will help supplement your Social Security checks. You may find that your expenses drop substantially in retirement, particularly if you have a mortgage paid off by then, so you won’t need to replace as much income as you think.

Another technique for coping with a late start is to work longer. That gives you longer to save, but it also allows your savings — and your Social Security benefits — more time to grow. You will be able to claim early Social Security benefits at 62, but you’ll be locking in a smaller check for life. It’s usually better to wait until your full retirement age, which will be 67, to begin benefits, since each year you wait adds nearly 7% to your check. If you wait three more years, until age 70, your check would grow by 8% each year. That’s a guaranteed return unavailable anywhere else.