401(k)

Entrepreneurs have responded enthusiastically: Solo 401(k) assets now stand at $2.5 billion, and could hit $90 billion by 2012. It's easy to see why the plans are becoming so popular. As with ordinary 401(k)s, as well as SEP-IRAs designed for the self-employed, individual 401(k)s allow you to invest a portion of your income on a pretax basis—and your contributions grow tax-deferred.

Source: wiktionary

John Fuchs was checking his 401(k) account online one afternoon when he saw something that seemed amiss.

Source: wiktionary

Contribute 10 percent of your salary each month to your 401(k), and you're good. Start at age 25 making $50,000 a year, and earn a 3 percent annual raise until retirement.

Source: wiktionary