Expires within six months

[mwtzzz]

"My license expires within six months."
"Mi licensia se vence dentro de seis meses."

Is "dentro de" the preferred way to say it?

[AngelicaDeAlquezar]

Yes; also (although more colloquial) "mi licencia se vence en seis meses".

[poli]

Could you use caducar instead of vencer in this case?

[AngelicaDeAlquezar]

Hmmm... I wouldn't. We use "caducar" more for foods or substances that get spoiled over time.

- Este medicamento caduca en mayo.
- No me había dado cuenta de que la pasta de dientes ya está caduca.
- No uses esa pimienta; ya caducó.