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Does an individual 401(k) plan make sense for me?

These plans are appealing if you intend to sock away large sums - you can contribute up to $49,000 in 2010. But 401(k) plans require more paperwork than SEP IRAs. If your account balance exceeds a certain amount, you have to file a special tax return for the plan, which can add slightly to tax-preparation costs and hassles.

In addition, many of the firms that will help you set up a solo 401(k) account levy setup charges (typically $100 to $375, depending on the level of service and the size of your account) as well as annual fees of $10 to $250.