Some riders could soon get refunds, the company said.
Uber said an internal error caused the company to wrongly charge riders the city's congestion fee after 10 p.m., when it's supposed to end.
The congestion pricing took affect in January and it is is supposed to run a $1.50 for rides between 6 a.m. and 10 p.m.
"These overcharges were remitted to the City," Uber said in a statement. "We are actively identifying all affected customers and will issue refunds accordingly."
SEE ALSO | FTC sues Uber, alleging it signed up Uber One subscribers without their permission
There is no word yet on how many riders were affected.
No further information about the refunds was immediately available.