Is there a minimum load amount? April 12, 2019 20:43 There is a $5 minimum when loading money on your Hop card, except at the TriMet Ticket Office at Pioneer Courthouse Square. Related articles What are the fares for each transit service? How do I load money on my card? How does reloading a plastic Hop card work? Is there a reduced fare available for low-income riders? What if my battery dies? Will I still be able to ride? Would a fare inspector give me a citation?