El permiso no retribuido es posible.

Because Spanish often uses the definite article to talk about something in a general or abstract sense.

So El permiso no retribuido es posible means something like Unpaid leave is possible or Unpaid leave is an option in general.

If you said Un permiso no retribuido es posible, it would sound more like An unpaid leave request is possible in a more specific or less natural way here.

Here, permiso means leave or authorised time off, especially in a work context.

It does not mean permission in the everyday English sense here, even though the words are related.

In Spain, permiso is commonly used for:

• permiso retribuido = paid leave
• permiso no retribuido = unpaid leave

So in this sentence, permiso is a workplace/HR term.

Because retribuido agrees with permiso, and permiso is masculine singular.

Agreement:

• permiso → masculine singular
• therefore retribuido → masculine singular

If the noun were feminine, the adjective would change:

• la licencia no retribuida

So the ending -o matches permiso.

Retribuido is an adjective meaning paid or remunerated.

It comes from the verb retribuir = to remunerate / to pay for work or services.

In this sentence:

• retribuido = paid
• no retribuido = unpaid

This is quite formal and common in administrative or employment language in Spain.

Yes, especially in formal, HR, or legal Spanish in Spain.

Very common expressions are:

• permiso no retribuido
• baja no retribuida
• excedencia no retribuida

In more everyday language, people might also say:

• sin sueldo
• sin paga

But no retribuido sounds more official and professional.

Because in Spanish, adjectives often come after the noun, especially when they classify or describe it in a factual way.

So:

• permiso no retribuido = unpaid leave

This is the normal order for this kind of expression.

Putting the adjective before the noun is usually either:

• impossible,
• less natural,
• or changes the tone/meaning.

So retribuido permiso would not be correct here.

Es posible means is possible.

The structure is:

• El permiso no retribuido = the unpaid leave
• es posible = is possible

This is a very standard way to say that something is allowed, feasible, or an option.

In context, it can imply:

• unpaid leave can be granted
• unpaid leave is available
• unpaid leave is possible under the rules

Yes, but the meaning and style shift a bit.

• El permiso no retribuido es posible
  = Unpaid leave is possible / available
  Very neutral, formal, policy-like.

• Se permite el permiso no retribuido
  = Unpaid leave is allowed
  More directly about permission.

• Se puede pedir un permiso no retribuido
  = You can request unpaid leave
  More practical and natural in everyday communication.

So the original sentence sounds a bit like something from a policy document or HR explanation.

Yes. Posible is an adjective, and here it works with ser:

• es posible = is possible

It describes el permiso no retribuido.

A useful detail: posible does not change for masculine/feminine in the singular:

• El permiso es posible
• La opción es posible

But in the plural it becomes:

• Los permisos son posibles
• Las opciones son posibles

Because Spanish normally uses ser posible, not estar posible, for this meaning.

• ser posible = to be possible
• estar posible is not the normal expression

This is because posible here describes a general condition or status, not a temporary physical state.

So:

• Es posible = correct
• Está posible = not natural/incorrect in standard Spanish

Yes, it is grammatical and understandable, especially in a formal or administrative context.

That said, in everyday conversation, a Spanish speaker might more naturally say:

• Se puede pedir un permiso no retribuido.
• Es posible pedir un permiso no retribuido.
• Existe la posibilidad de pedir un permiso no retribuido.

So the given sentence is fine, but it sounds a bit institutional or policy-based.

They are not the same.

• vacaciones = holidays / vacation time
• permiso = leave / authorised absence

A permiso is usually for a specific reason or request, such as:

• family matters
• medical appointments
• personal reasons
• administrative procedures

So permiso no retribuido is not the same as taking regular paid holiday.

Yes, depending on the context.

Some related expressions are:

• permiso sin sueldo
• licencia no retribuida
• excedencia (not exactly the same; usually a different legal category and often longer-term)

In Spain, permiso no retribuido is a very standard and clear term in employment contexts, especially when talking about a temporary period of unpaid authorised leave.