IRS Limits & Aggregation Rules

If you are eligible for more than one retirement plan, there is a limit on the amount that may be contributed which must be aggregated for certain plan types, as described below. You want to make sure you do not exceed your individual limit. If you do and the excess is not returned by April 15 of the next year, you could be subject to additional taxation.

415(c) - Employer + Employee Contributions

Lesser of 100% of employee’s compensation or $58,000 for 2021

Generally applies in aggregate to plans of the same kind. 

The following plans are aggregated (excludes catch-up contributions):

  • Alternate Pension Plan (APP) – 403(b)
  • Tax Deferred Account Plan (TDA) – 403(b)
  • Other 403(b), 401(a), 401(k) or SEP plans, depending on your personal situation 

402(g) - Employee Elective Deferrals Only

Lesser of 100% of employee's compensation or $19,500 for 2021 (plus $6,500 age 50 catch-up, if applicable)

The following plans are aggregated:

  • Tax Deferred Account Plan (TDA) – 403(b)
  • 403(b) or 401(k) plan to which you make elective deferrals sponsored by any other employer*
  • Other 403(b) or 401(k) or SARSEP plans, depending on your personal situation

457(b) - Employee Elective Deferrals Only

Lesser of 100% of employee's compensation or $19,500 for 2021 (plus $6,500 age 50 catch-up, if applicable)

The following plans are aggregated:

  • 457(b) Retirement Plan– 457(b)
  • Other 457(b) plans in which you participate, depending on your personal situation