No. https://www.wmata.com/fares/smartrip/smartrip_qanda.cfm#multiple_users Can more than one person use a SmarTrip® card for the same ride? No, you cannot share a SmarTrip® card; each rider must have his or her own card. However, you do not need a SmarTrip® card to ride. There are other ways to pay your fare, and this can be done once you get to the station or board the bus; however, most non-SmarTrip® fare options have surcharges. For more information on other ways to pay your fare, please see our Metro Pass and Farecard Options or call Metro Customer Service at 202-637-7000.
https://www.wmata.com/fares/smartrip/smartrip_qanda.cfm#multiple_users
Can more than one person use a SmarTrip® card for the same ride?
No, you cannot share a SmarTrip® card; each rider must have his or
her own card. However, you do not need a SmarTrip® card to ride. There
are other ways to pay your fare, and this can be done once you get to
the station or board the bus; however, most non-SmarTrip® fare options
have surcharges. For more information on other ways to pay your fare,
please see our Metro Pass and Farecard Options or call Metro Customer Service at 202-637-7000.