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

Examples
Tengo que pagar el alquiler mensual hoy.
I have to pay the monthly rent today.
La revista mensual tiene artículos muy interesantes.
The monthly magazine has very interesting articles.
El equipo tiene una reunión mensual para revisar los objetivos.
The team has a monthly meeting to review the goals.
One Form for Everything
Unlike many Spanish words that change their ending for masculine or feminine items, 'mensual' stays exactly the same. You can use it for 'el pago' (masculine) or 'la revista' (feminine).
Word Order
In English, 'monthly' usually comes before the noun. In Spanish, it almost always comes after, like 'pago mensual' (payment monthly).
Avoid adding -a
Mistake: “La cuota mensuala.”
Correction: La cuota mensual. Words ending in -l don't need an -a to become feminine.
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