"...The Roth TSP option will allow you make deferrals of after-tax dollars from your paycheck into the plan. If you meet the requirements, which include being at least age 59½ and having held the Roth for at least five years, you may withdraw both your contributions and any earnings, free from federal income tax. Traditional TSP contributions are made with pre-tax payroll deferrals, which are taxed, along with any earnings, when they are later withdrawn..."
Read more at federaltimes.com
