The plans are simpler than a Keogh. Most banks, brokerages and insurance companies can help with the paperwork. Sole proprietors, partnerships and corporations can set up SEPs. Contributions are tax-deductible, and there are no taxes on earnings. There are even tax credits of up to $500 a year for each of the first three years for the cost of starting the plan. Participants can't take loans from a SEP-IRA, but they can make withdrawals at any time, subject to a 10% penalty if they're under the age of 59½. The funds can also be rolled over, tax-free, to another SEP-IRA, a traditional IRA or another employer's qualified retirement plan. -- Reported by Joe Mont in Boston.