Do you own and operate a small business? Although your equity in the company could help finance your retirement someday, it's also important to put money in a retirement account, just as you would if you worked for someone else. There are several kinds of tax-advantaged accounts for you to consider.

One plan that has been popular recently is the solo 401(k). In the past, high administrative fees often discouraged business owners from using these plans, but costs have come down. Plus, a solo 401(k) may offer distinct advantages.

The solo 401(k) also goes by various other names, including the solo-k, the uni-k, and the one-participant-k. It closely resembles a traditional 401(k) for larger businesses, but this one covers only a business owner with no employees (or just that person and his or her spouse). Solo 401(k)s generally have the same rules and requirements as other 401(k)s.