401(k) Mistakes Job Hoppers Make

Here’s how to keep your nest egg intact when moving on to a new job.

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When you switch employers, it's important to keep your nest egg intact. Without careful attention, a variety of taxes and fees could significantly reduce your retirement savings. Before making any major career moves, be sure to take a close look at 401(k) vesting schedules and waiting periods. Here are seven common 401(k) mistakes that job hoppers make:

[See 10 Ways to Boost Your Social Security Checks.]

Leaving before you're vested. You can always take your 401(k) contributions with you when you leave a job. But you won't be able to keep your employer's 401(k) match or profit sharing contributions unless you are vested in the plan. About 40 percent of 401(k) plans provide immediate vesting for matching contributions, according to the Profit Sharing/401(k) Council of America. The majority of companies require you to stay with the employer for a number of years before you can keep any of the match, or allow you to keep a gradually increasing proportion of the match based on your job tenure. "If you are choosing to leave and you are close to the end of the vesting schedule, you could be leaving money on the table," says Tom Orecchio, a certified financial planner for Modera Wealth Management in Westwood, N.J. Find out when you will become vested in the plan, and consider sticking around if the date is relatively close.

Not saving during the waiting period. Only about half of companies allow new employees to contribute to their 401(k) immediately upon joining the firm, according to an analysis of 2,200 retirement accounts administered by Vanguard. Some employers require you to wait between one and three months (25 percent) or even an entire year (15 percent). "If you're not part of the profit-sharing or 401(k) plan, you do have other options such as IRA and Roth IRA accounts," says Jerry Korabik, a certified financial planner for Savant Capital Management in Rockford, Ill. Don't stop building your nest egg just because the company's official plan is closed to you.

Saving less when an employer matches less. A 401(k) match is a powerful incentive to save for retirement. A quarter of 401(k) participants choose to save exactly enough to get the maximum possible employer contribution, according to a Schwab Retirement Plan Services analysis of 911 401(k) plans. But simply meeting the match threshold may not be enough for a secure retirement. "Some people only save when they are paid to save, but that shouldn't be the only reason you are doing it," says William Cuthbertson, a certified financial planner for Fiscalis Advisory, Inc., in San Juan Capistrano, Calif. "People need to be saving 10 to 15 percent of their salary, starting at a young age." So if your new employer offers smaller matching contributions, you should make up the difference by saving more on your own.

[Visit the U.S. News Retirement site for more planning ideas and advice.]

Not saving when your employer doesn't offer a 401(k). Unless you job-hop exclusively among large or particularly generous employers, you may eventually find yourself working for a company that doesn't offer retirement benefits. Only 59 percent of all workers were offered a pension or retirement account at work in 2009, according to an Employee Benefit Research Institute analysis of Census Bureau data. And just 45 percent of workers participate in these retirement plans. It's important to save something, even in years when you're not getting any help from your employer.

Cashing out your old 401(k). Almost a third of retirement savers cash out their 401(k) when they leave or change their job, Vanguard found. Workers who cash out must pay income tax on that amount and, if they are under age 55, will face a 10 percent early withdrawal penalty. A worker in the 20 percent tax bracket who has a $3,000 401(k) balance would receive just $2,100 after taxes and penalties if he or she cashed out before retirement.

Fail to shop around for the best tax-deferred account. There are several ways to maintain the tax-deferred benefits of your 401(k) when you leave a job. You can leave your money in your former employer's plan, roll it into an IRA, or transfer your balance into your new employer's 401(k) plan. "You want to compare the available investment options and the costs of your current and former plan," says Korabik. Sometimes 401(k) plan sponsors are able to negotiate low investment fees for participants. But if the 401(k) plans available to you carry high fees, consider shifting your nest egg into an IRA with lower costs and more investment options.