Q. I currently make 5 percent contributions to my TSP per pay period. Is it possible for me to make a lump sum contribution at the end of the year equivalent to 10 percent to bring me up to the allowable 15 percent annual contribution? I would not exceed the maximum allowable annual contribution amount.
A. There are only two ways you may contribute to your TSP account: 1. Through payroll deferral and 2. By transferring money in from an eligible retirement plan account. You may be able to increase your payroll deferral rate near the end of the year to accomplish this goal, but you’ll need to work with your payroll department to navigate the logistics. You can’t just write a check.