Note: This information is garnered from OPM. We are making the resource for the FERS Annuity Supplement Calculation easier to find. We are not affiliated with OPM or the federal government.
The FERS annuity supplement is paid in addition to gross monthly Federal Employees Retirement System (FERS) annuity benefits. It represents what you would receive for your FERS civilian service from the Social Security Administration (SSA) and is calculated as if you were eligible to receive SSA benefits on the day you retired. If you retire voluntarily on an immediate annuity which is not reduced for age, you may be eligible for the annuity supplement, in addition to your regular monthly FERS benefit. You may also receive the supplement if you retired involuntarily before attaining your Minimum Retirement Age (MRA) or voluntarily because of a major reorganization, reduction in force, or an early retirement for Members of Congress. However, in these three instances, you will not be eligible for the annuity supplement until you reach your Minimum Retirement Age (MRA). If you receive a deferred benefit, a disability benefit or an immediate MRA+10 benefit, you will not be eligible for the annuity supplement. If your annuity has a Civil Service Retirement System (CSRS) and a Federal Employees Retirement System (FERS) component, you can still receive an annuity supplement. However, you must have completed one full calendar year of service subject to FERS computation rules. FERS Annuity Supplement and Calculation