The opt-in deadline for the Blended Retirement System (BRS) is December 31, 2018. The BRS gives service members a chance to save their money in a portable Thrift Savings Plan while also receiving matching government funds. Troops should make their decision knowing only they can determine which system is best for them, and understand that if they opt into BRS, it is irrevocable. Utilize the BRS comparison calculator on the Military Compensation website before making an appointment with your base financial counselor. For more information, visit this Military.com section on BRS.