Federal Employees Retirement System (FERS)

The Federal Employees Retirement System (FERS) is the retirement plan covering most civilian employees of the U.S. federal government, established under Chapter 84 of Title 5 of the U.S. Code and effective for those first hired since 1984. It is a three-part system: a defined-benefit basic annuity funded by the government and small employee contributions, mandatory Social Security coverage, and the Thrift Savings Plan, a defined-contribution account similar to a 401(k) that receives automatic and matching agency contributions. The design intends the three pieces to combine into a full retirement income rather than relying on any one.

The basic annuity is the FERS-specific piece and follows a straightforward formula: for most retirees, 1 percent of the high-3 average salary (the average of the highest 36 consecutive months of pay) for each year of creditable service. The rate rises to 1.1 percent per year for an employee who retires at age 62 or later with at least 20 years of service, which makes waiting to that point meaningfully more valuable. Eligibility to retire turns on combinations of age and service, including the minimum retirement age (between 55 and 57 depending on birth year), and a special retirement supplement can bridge income from the minimum retirement age until Social Security becomes available for those who qualify.

FERS is often confused with two neighbors. The Civil Service Retirement System (CSRS) is the older plan for federal workers hired before 1984; it pays a larger basic annuity but, crucially, CSRS service is not covered by Social Security, which is why the now-repealed Windfall Elimination Provision and Government Pension Offset fell most heavily on that population. And the Thrift Savings Plan leg of FERS is its own subject: it shares the contribution limits and mechanics of workplace defined-contribution plans and holds a small menu of low-cost index-style funds. Note that the FERS basic annuity is a defined benefit, so a phrase like "FERS annuity" describes that pension; the acronym FERS by itself refers to the whole three-part system.

The FERS basic annuity is computed from three inputs, and the other two legs layer on top.

1. Determine the high-3 average salary, the average of the highest 36 consecutive months of basic pay.

2. Multiply by the per-year rate: 1 percent for most retirees, or 1.1 percent if retiring at 62 or older with at least 20 years of service.

3. Multiply by years of creditable service to get the annual basic annuity.

A hypothetical example. Dana retires at 60 with 30 years of service and a high-3 average salary of $100,000. Her basic annuity is 1 percent times 30 years, or 30 percent, of $100,000, which is $30,000 a year. If instead she works two more years and retires at 62 with 32 years, the enhanced 1.1 percent rate applies: 1.1 percent times 32 years is 35.2 percent of $100,000, or $35,200 a year, a jump from both the extra service and the higher multiplier. On top of the basic annuity, Dana also has her Thrift Savings Plan balance and her Social Security benefit, the other two legs of the system.

Pros

• Combines a guaranteed pension, Social Security, and a low-cost retirement account, spreading risk across three sources.
• The Thrift Savings Plan is portable and receives automatic and matching agency contributions.
• The 1.1 percent enhanced multiplier rewards staying to age 62 with 20 or more years of service.

Cons and cautions

• The FERS basic annuity multiplier is modest (1 percent for most), so the system leans on the Thrift Savings Plan and Social Security to reach adequate income.
• Retirement eligibility depends on age-and-service combinations that are easy to misjudge, including the minimum retirement age.
• It should not be confused with the older CSRS, which pays a larger annuity but lacks Social Security coverage.