Simplified Employee Pension (SEP) A type of retirement plan that an employer or self-employed individuals can establish. The employer is allowed a tax deduction for contributions made to the SEP plan and makes contributions to each eligible employee's SEP IRA on a discretionary basis. Investopedia Says: Contributions to SEP IRAs are immediately 100% vested, and the IRA owner directs the investments. Related Terms: Individual Retirement Account - IRA Roth IRA Saver's Tax Credit |