The FERCCA allows OPM, in its sole discretion, to compensate you for a monetary loss that is a direct and proximate result of your retirement coverage error.
Monetary losses include payments of additional Social Security taxes, payment of additional retirement deductions, and other out-of-pocket expenses that you incurred because of a retirement coverage error.
You must substantiate your claim for losses with any evidence that supports your request.
OPM cannot pay you for:
Claimed losses related to forgone contributions and earnings under the TSP, other than lost earnings on make-up contributions to the TSP as provided in subpart J of this part; and
Claimed losses related to any other investment opportunities.