1 Only required if plan has employer contributions but never for government plans.
2 Other - Generally, the plan's assets are held in a tax-exempt trust, though they can also be held in custodial accounts and annuity contracts.
3 All Dollar limits are for 2013 and subject to cost-of-living adjustments in future years (except the age 50+ catch-up contributions for Payroll Deduction IRAs).
4 Employer may contribute to an employee's retirement account but the total employer and employee contributions may not for 2013 exceed 100% of the employee's compensation, or $51,000 or more if additional contributions permitted by plan (age 50+ catch-up contributions, 15 or more years of service or 3 years prior to normal retirement age). In a 403(b) plan, compensation means the employee's includible compensation.
5 Required - The amount an employer must deposit into the plan on behalf of an employee must either be a matching contribution that equals a certain portion or percentage of the employee's contributions or a minimum nonelective contribution to all plan participants. The amount of the required employer contributions vary depending on the plan.
6 The amount of an employer's annual contributions are determined by an actuary.
7 The maximum combined employer and employee contributions are for 2013 the lesser of 100% of an employee's includible compensation, or $17,500 or more if additional contributions permitted by plan (age 50+ catch-up contributions or 3 years prior to normal retirement age).
8 Only applies to government plans.
9 Withdrawals may be made at any time, subject to tax