Refers to an extra fee added to a cost.
En la tienda de electrónica, se aplicó un recargo por el uso de tarjeta de crédito, lo que me sorprendió.
In the electronics store, a surcharge was applied for using a credit card, which surprised me.
El recargo por el servicio de entrega era inesperado, pero valió la pena por la rapidez.
The surcharge for the delivery service was unexpected, but it was worth it for the speed.