Q. I am under FERS. I want to purchase a Thrift Savings Plan annuity. After I retire, is it possible for me to add funds to my TSP savings to increase my monthly TSP annuity?
A. The only way to add funds to your TSP account after you retire is to transfer money in from a qualified IRA or employer-sponsored retirement plan. This will have no effect on a TSP annuity that has already been purchased, however.