The biggest benefit for a business with a Simple IRA plan is that it provides a very easy way to provide an employee retirement option without all the technical complications of 401Ks and similar account plans. Second, the establishment and maintenance costs to run a Simple IRA plan are a big plus for the cost-conscious business. Additional benefits include No special plan-level tax reporting is required for the employer annually. No discrimination testing is necessary. There is no requirement on the employer to track vesting. All contributions are immediately 100% vested (at the point of deposit the employee owns the full amount in the retirement account without any time delay).