FERS employees receive an "Agency Automatic Contribution" of 1% of base pay (this includes any locality pay adjustment and/or shift differential but does not include overtime or bonus pay) from the first day of employment, even if the employee does not contribute to the TSP.
Additional matching contributions are made dollar-per-dollar for up to 3% of base pay, then at fifty-cents-per-dollar for each additional percent up to 5% [REF].