The earlier you start saving for retirement, the better. That's because a retirement account works best over a long period of time, thanks to what's called compound interest, where you earn interest on your interest, as well as on whatever money you actually put toward retirement.
Confused? No worries. Here's what that really means.
Imagine you have an account that compounds interest each year. The first year you put money into the account, you'll earn a small fraction of that amount as interest. The next year, and every year after that, you'll earn interest on whatever money you've saved in the account, including the interest you've already earned. This means that the sooner you start contributing, the bigger and faster your money can grow.
Say you just turned 30, and you've decided to start saving $100 a month in a retirement account with 4 percent compound interest. Your friend does the same, except she waits until she's 40. By the time you're both 65, your balance will be $91,677 while hers will be $51,584.
Now, this is partly because you contributed more money than her ($12,000 more, to be exact) before she ever touched her account. Even if you add $12,000 to her balance, though, she'll have only $63,584 — $28,093 less than you. That $28,093 is the compound interest you earned from your 10-year head start, and that's the result of contributing just $1,200 a year!
The bottom line? Whether you're in your 20s, 30s, or 40s, start planning for retirement now.