noun, noun or participle which takes 'suru', transitive verb
adding on top; extra charge; surcharge
Used for adding an extra amount, fee, or surcharge on top of a base amount. Common in financial and business contexts.
料金にサービス料を上乗せする。
They add a service charge on top of the fee.
運賃に燃料
A fuel surcharge was added on top of the fare.