Fecha límite vs. fecha tope vs. plazo

In Spanish, the words 'fecha límite', 'fecha tope', and 'plazo' all relate to the concept of a deadline but have slightly different nuances and uses. Let's explore their meanings and usage through various examples.

Fecha límite

'Fecha límite' refers to the latest date by which a task must be completed. It is used to emphasize the point beyond which something cannot be done or accepted.
La fecha límite para entregar el informe es el 10 de diciembre.
(The deadline to submit the report is December 10.)
Tienes hasta la fecha límite para solicitar el reembolso.
(You have until the deadline to request a refund.)

Fecha tope

'Fecha tope' indicates a maximum date or a cut-off point. It often implies that beyond this date, nothing more will be considered or allowed.
La fecha tope para inscribirse en el curso es el 5 de noviembre.
(The final date to enroll in the course is November 5.)
Hemos fijado una fecha tope para terminar las negociaciones.
(We have set a final date for concluding the negotiations.)

Plazo

'Plazo' refers to a time period within which something must be done, often specifying both the start and end points. It can be translated as 'period' or 'term'.
El plazo para enviar las solicitudes es del 1 al 15 de agosto.
(The period for submitting applications is from August 1 to 15.)
Tenemos un plazo de dos semanas para completar el proyecto.
(We have two weeks to complete the project.)

Summary

In summary, while 'fecha límite' and 'fecha tope' both convey a clear end-point for an action or event, 'fecha límite' tends to emphasize its urgency and obligatory nature, whereas 'fecha tope' serves as a definitive cut-off point. On the other hand, 'plazo' involves a specified duration within which an action should take place, naming both starting and ending points.