Upon returning, employees are generally treated as though they had never left. This means that time spent in the uniformed services counts for seniority, within-grade increases, completion of probation, career tenure, retirement, and leave rate accrual. Employees do not earn sick or annual leave for that time, however.
To receive civil service retirement credit for military service, a deposit to the retirement fund is usually required to cover the period of military service.
Employees who perform uniformed service may make up any contributions to the Thrift Savings Plan they missed because of such service. In addition, members of the Ready Reserve or National Guard serving on active duty and in any military pay status can contribute to the TSP through a uniformed services TSP account.