Federal employees can use a new Thrift Savings Plan tool to weigh the tax costs and retirement advantages of moving traditional balances to Roth.

Thrift Savings Plan participants need to carefully weigh the advantages and potential tax pratfalls of moving their balances to an after-tax investment strategy.

One of the biggest things that we like to remind people is that when you hit retirement you have to start managing your money in reverse," Thiago Glieger said.