noun / verb
surcharge
SER-charj/ˈsɜːrtʃɑːrdʒ/
An extra fee added to a usual price or charge.
The receipt shows a surcharge below the usual charge.

Etymology
A surcharge was originally an additional or excessive load. As a charge became a financial burden or price, surcharge came to mean an extra amount added to the usual payment.
In context
possible one percent tax surcharge and how it would be used
More examples
- The airline adds a fuel surcharge to each ticket.
- Delivery surcharges vary by location.
- The hotel surcharges guests who check out late.
Forms
surcharge · surcharges · surcharged · surcharging