To pay US tolls from Canada, you have to voluntarily mail the money to the concerned toll authority or pay it online on their website. The toll authority can also send you an invoice with a penalty (depending on if your province shares plate owner’s information with them).

In case you don’t know how much tolls you owe or cannot pay online, it’s advised to contact the concerned toll authority and explain the situation.    US Toll Calculator

The calculator also shows toll plazas on map with details of toll payment method, toll rate, discount for each of them.

Note: Most cross-border bridge tolls between the US and Canada can be paid in either U.S. or Canadian dollars.

See also

• How to pay toll in the US?

• How do you pay tolls in Canada?