Pysäköintilupa vanhentuu huomenna.

Pysäköintilupa is a compound noun:

• pysäköinti = parking
• lupa = permit, permission

So pysäköintilupa means parking permit.

This is very common in Finnish: two nouns are joined together into one word. The final part, lupa, is the main word, so the whole compound is a type of permit.

Because Finnish normally writes compound nouns as a single word.

So where English says parking permit as two words, Finnish says pysäköintilupa as one word.

This is something English speakers often need to get used to, because Finnish compounds are very productive and very common.

It is in the nominative singular.

In this sentence, pysäköintilupa is the subject:

• Pysäköintilupa = the parking permit
• vanhentuu = expires
• huomenna = tomorrow

So this is the basic subject form of the noun.

Finnish does not have articles like English a/an and the.

So pysäköintilupa can mean:

• a parking permit
• the parking permit

Which one is meant depends on context. In a sentence like this, English often uses the if a specific permit is meant, but Finnish does not need a separate word for that.

Vanhentuu comes from the verb vanhentua.

Its basic idea is to become old/outdated, and depending on context it can mean:

• expires
• becomes invalid
• goes out of date
• becomes obsolete

With pysäköintilupa, the most natural English translation is expires.

So the sentence means that the parking permit stops being valid tomorrow.

Because the verb is vanhentua, and its 3rd person singular present form is vanhentuu.

Finnish verbs belong to different conjugation types, so the present-tense ending is not always formed in the same way. With vanhentua, the correct form is:

• minä vanhenen / vanhennun? no, for this verb the common pattern learners focus on here is
• se vanhentuu = it expires / becomes outdated

So in this sentence:

• pysäköintilupa vanhentuu = the parking permit expires

A useful thing to remember is that Finnish 3rd person singular often ends in a doubled vowel, as in -uu here.

It is active, not passive.

Even though English often uses a more passive-sounding idea like is expired in some contexts, Finnish here uses an active verb:

• Pysäköintilupa vanhentuu = the parking permit expires

The subject is the thing undergoing the change. Finnish does this very naturally with many verbs of change, like becoming old, breaking, opening, closing, expiring, and so on.

Because huomenna is the normal adverb meaning tomorrow.

Compare:

• huomenna = tomorrow
• huominen = tomorrow / tomorrow’s, usually as a noun or adjective in other structures

In this sentence, you need the adverb of time, so huomenna is correct:

• Pysäköintilupa vanhentuu huomenna. = The parking permit expires tomorrow.

Historically, huomenna contains the old -na/-nä essive ending, but for learners it is best to remember it simply as the standard word for tomorrow.

Yes. Finnish word order is more flexible than English word order.

The neutral order here is:

• Pysäköintilupa vanhentuu huomenna.

But you could also say:

• Huomenna pysäköintilupa vanhentuu.

That version puts more emphasis on tomorrow.

Because Finnish marks grammatical roles in other ways, word order is often used to show emphasis, topic, or what is new information.

You would say:

Pysäköintilupa ei vanhene huomenna.

Notice two things:

• Finnish uses the negative verb ei
• the main verb changes form: vanhentuu → vanhene

So:

• vanhentuu = expires
• ei vanhene = does not expire

This change is very typical in Finnish negatives.

It sounds neutral and natural. It would work well in:

• everyday speech
• notices
• official messages
• apps or websites
• written reminders

It is a very normal way to say that a permit expires tomorrow. If anything, it sounds slightly more matter-of-fact than conversational, but not unusually formal.