401(k) plans are a great vehicle for saving for retirement. Typically, an employee can choose to allow an employer to contribute a portion of his or her salary to the plan. Some employers might even match those contributions. The 401(k) contributions are invested in funds that might include money-market, mutual, or bond funds.
You are not taxed on 401(k) funds until you withdraw money from your plan. And, while it is your money, there are consequences to withdrawing money from your 401(k) before you reach age 59 and ½.