How to Say "expense" in Spanish
The Spanish word for “expense” is “costo” — A1 level. This is a very common word in everyday Spanish.
English → SpanishA1
nounA1
money spent

Examples
El costo del billete de avión es muy alto.
The cost of the plane ticket is very high.
Necesitamos reducir los costos operativos.
We need to reduce the operating costs.
Masculine Noun
Since 'costo' is masculine, always use 'el' or 'un' before it: 'el costo' (the cost), 'un costo' (a cost).
Confusing 'costo' and 'costa'
Mistake: “Using 'la costo' (incorrect gender).”
Correction: Always use 'el costo' (the price/expense). 'La costa' means 'the coast' or 'the shore'.
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