The only downside for businesses that have employees is that whatever percentage you choose for yourself, you have to match on your employee’s behalf. For example, if you are putting in 20% of your income into your SEP IRA, you are going to have to put in 20% of all of your employees income as well. If you have a large number of employees that get paid a pretty hefty salary, that is a pretty big sum coming out of the company’s checkbook. There are ways to exclude certain employees so get up to speed on the SEP IRA rules. Definitely check with a CPA before setting that up.