How to Say "surplus" in Spanish
The Spanish word for “surplus” is “exceso” — B1 level. This is a very common word in everyday Spanish.

Examples
Condujo con exceso de velocidad y le pusieron una multa.
He drove with excessive speed and was given a ticket.
Hay un exceso de azúcar en esta receta, es demasiado dulce.
There is an excess of sugar in this recipe; it's too sweet.
Debemos evitar el exceso de trabajo para cuidar nuestra salud.
We must avoid overworking (an excess of work) to take care of our health.
Using 'de' with Exceso
You almost always use the little connecting word 'de' (of) after 'exceso' to show what there is too much of: 'exceso de sal' (excess of salt).
Translating 'Too much'
Mistake: “Using 'demasiado' directly as a noun: 'Hay demasiado en la mesa.'”
Correction: Use 'exceso' when talking about the quantity itself: 'Hay un exceso de cosas en la mesa.' ('Demasiado' is usually an adjective or adverb.)
Related Translations
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