How to Say "extra fee" in Spanish
The Spanish word for “extra fee” is “suplemento” — A2 level. This is a very common word in everyday Spanish.

Examples
Hay un suplemento de diez euros por la maleta extra.
There is a ten-euro surcharge for the extra suitcase.
Me gusta leer el suplemento dominical del periódico.
I like reading the Sunday supplement of the newspaper.
Este libro tiene un suplemento con mapas detallados.
This book has a supplement with detailed maps.
Always Masculine
Even though it refers to things that might seem feminine (like a 'dieta' or 'revista'), the word 'suplemento' always uses 'el' or 'un' because it ends in 'o'.
Using 'de' for detail
To specify what the extra is for, simply use 'de' right after the word, like 'suplemento de equipaje' (luggage supplement).
Don't confuse with 'complemento'
Mistake: “Tengo un complemento de diez euros.”
Correction: Tengo un suplemento de diez euros.
Related Translations
Learn Spanish with Inklingo
Interactive stories, personalized learning, and more.