A FERS disability retirement is one of the most consequential federal benefits available to an employee whose medical condition prevents them from continuing their job. It is also one of the most frequently misunderstood and frequently denied. Most applications fail not because the employee isn’t disabled, but because the application doesn’t connect the disability to the specific standard OPM applies.

Here is what OPM actually requires.

The three eligibility tests.

To qualify for FERS disability retirement under 5 U.S.C. § 8451, an employee must satisfy all three of the following:

  1. Service test. The employee must have at least 18 months of creditable FERS service (for employees who become disabled in the line of duty, the 18-month requirement is waived).
  2. Disability test. The employee must have a physical or mental disability that prevents them from performing useful and efficient service in their current position (or in a position of similar grade and pay within their agency, commuting area).
  3. Duration test. The disability must be expected to continue for at least one year from the date the disability application is filed.

Each test is a discrete hurdle. Failing any one of them means no disability retirement.

What “useful and efficient service” actually means.

This is the test most applications fail. The phrase sounds generic, but OPM has decades of case law behind it. The determination is not whether the employee can do some job. It is whether the employee can do their current job(or a vacant, existing position of similar grade and pay within their agency’s commuting area).

A few important consequences:

  • Light-duty or accommodated work counts. If an employee can perform the essential functions of their current position with reasonable accommodation, they are not eligible for disability retirement. The accommodation analysis happens under the Rehabilitation Act, not under FERS.
  • Other federal positions are considered. OPM (and OPM’s reviewing authority, the Merit Systems Protection Board) considers whether the employee could perform an existing vacant position at the same grade and pay. This is sometimes called the vacant-position inquiry.
  • Private-sector work is not considered. OPM does not consider whether the employee could work in private industry. The standard is federal useful and efficient service in a position of similar grade and pay.

The most common denial reason I see in case files: medical documentation that establishes a diagnosis but doesn’t connect the diagnosis to the specific duties of the employee’s position. A physician’s letter that says “patient is disabled and cannot work” is not enough. A letter that says “patient cannot sit for more than 30 minutes at a time, cannot concentrate for more than 15 minutes, and cannot interact with the public” is the kind of documentation that supports a denial — because it makes the inability to do the specific job concrete.

The two pathways to apply.

FERS disability applications can be filed in one of two ways:

  • Through the agency. The employee applies to their agency’s human resources office, which reviews the application, may offer accommodation or reassignment, and forwards the application to OPM with a recommendation.
  • Directly to OPM. The employee can apply directly to OPM, which may result in the application being returned to the agency for initial review. In practice, the agency is involved either way.

The application packet is substantial: SF 3112 (the application form), medical documentation, employing agency documentation, and a statement of disability. The packet is the case. Most denials turn on what the packet does or doesn’t contain.

What happens after approval.

A FERS disability annuity is calculated as the lesser of:

  • 40% of the employee’s high-3 average salary, or
  • The regular FERS annuity the employee would have earned at their actual age and service.

The 40% floor means a FERS disability retiree will always receive at least 40% of their high-3, regardless of how few years of service they had. The annuity may be reduced if the employee also qualifies for Social Security disability benefits (the FERS-Social Security disability offset).

Disability retirees must undergo periodic medical reexamination until age 60, after which the annuity continues for life. The reexamination is not optional.