FERS employees earning more than $92,302 would exceed the 2003 $12,000 dollar cap by investing in the TSP at 13 percent of salary. Employees earning above that amount might want to designate their TSP contributions in dollar amounts rather than in percentage amounts. The exact dollar figure would depend on how many pays the individual will receive during the year. In most cases it would be 26, but payroll cycles vary among agencies; employees should check with their payroll offices.