"SmarTrip cards are available for purchase at Montgomery County Division of Treasury at 255 Rockville Pike, Suite L-15, Rockville, MD (M-F from 8:00 AM - 4:00 PM) and TRiPS Commuter stores located 8404 Colesville Road, Level 2 of the Paul Sarbanes Transit Center, SIlver Spring (M-F 7:00 AM-5:00 PM) and 17 Wisconsin Circle, Chevy Chase (M-F 11 AM-7 PM). Riders may also load fare value on a SmarTrip card using the bus farebox or online.
Purchasing a SmarTrip card is easy and can be completed online using Visa, Mastercard or Discover. A SmarTrip card can also be purchased at all Metrorail stations or at Metro sales offices, retail outlets such as specific CVS and Giant stores and commuter stores. Not all of these locations are capable of loading value and riders should refer to the link below for additional information.
A reduced fare SmarTrip card is available for senior citizens and people with disabilities. To purchase a Senior SmarTrip card, proof of age must be provided. People with disabilities must have a valid Metro Disability ID card to purchase the reduced fare SmarTrip card."