Employees who are age 50 or above, or will be before the end of the year, and who have already hit the dollar limit of $17,500 or are on an investing pace to do so by the end of the year, may wish to investigate making TSP "catch-up contribution" investments. Those investments are above the normal dollar limit but must be elected separately and carry no matching government contributions for FERS employees. Unlike regular TSP investing, catch-up elections do not carry over from one year to another, so eligible persons who made such investments last year have to submit a new election for this year. The maximum this year is $5,500; that similarly is a combined total for those who invest in both traditional and Roth balances. An election for a catch-up can be made at any time, but the farther into the year an investor waits, the larger the biweekly amount would have to be in order to reach the maximum.