A kiszállási díjat holnap fizetem.

Because díjat is the direct object of the verb fizetem.

In Hungarian, a definite direct object usually gets the accusative ending -t:

• díj = fee
• díjat = fee (as the object)

The extra vowel in díjat is just there to make the word pronounceable. So it is not simply díj + t, but díj + at.

Because Hungarian has two main present-tense conjugation patterns:

• indefinite conjugation
• definite conjugation

Here the object is definite: a kiszállási díjat = the fee.
When the object is definite, Hungarian normally uses the definite conjugation:

• fizetek = I pay / I am paying (something non-specific)
• fizetem = I pay it / I am paying the specific one

So fizetem matches the definite object.

Kiszállási is an adjective formed from kiszállás.

Breakdown:

• ki = out
• száll = to get out / to go out / to go somewhere
• kiszállás = going out, dispatch, on-site visit, delivery, call-out
• kiszállási = related to that going out / delivery / call-out

The ending -i often turns a noun into an adjective meaning related to.

So kiszállási díj is a set phrase meaning something like:

• call-out fee
• delivery fee
• on-site service fee

The exact English wording depends on context.

Because the speaker is talking about a specific fee, not just any fee.

• egy díjat = a fee
• a díjat = the fee

Hungarian uses articles much like English does, although the details are not always identical. Here a shows definiteness, and that is also why the verb appears in the definite form fizetem.

Because Hungarian very often uses the present tense for future meaning when a time word makes the future clear.

So:

• Holnap fizetem. = I’ll pay it tomorrow.

This is completely normal Hungarian.

Hungarian can also form a more explicit future, for example:

• Holnap fogom fizetni.

But the simple present with a future time word is often more natural.

Hungarian word order is flexible, and it often reflects emphasis or information structure rather than strict grammar rules.

This sentence suggests something like:

• As for the call-out fee, I’m paying it tomorrow.
• or with emphasis on tomorrow: It’s tomorrow that I’m paying the call-out fee.

A useful way to think about it:

• A kiszállási díjat is the topic: what the sentence is about
• holnap is in a prominent position before the verb, so it gets attention

So the sentence is not just about what happens, but also about what information is being highlighted.

Yes. That is also correct and very natural.

Both are grammatical, but they feel slightly different:

• Holnap fizetem a kiszállási díjat.
  More straightforward, often closer to neutral I’ll pay the call-out fee tomorrow.

• A kiszállási díjat holnap fizetem.
  More likely to frame the call-out fee as the topic and highlight tomorrow.

So the difference is mainly about emphasis and discourse, not basic meaning.

Because Hungarian usually leaves subject pronouns out when the verb ending already shows who the subject is.

Here:

• fizetem already means I pay / I am paying

So én is unnecessary unless you want extra emphasis or contrast:

• Én fizetem. = I’m the one paying it.

This is very common in Hungarian.

Holnap is an adverb meaning tomorrow.

It does not need a separate preposition or case ending here. Hungarian has several time adverbs that work this way:

• ma = today
• tegnap = yesterday
• holnap = tomorrow

So holnap fizetem is simply I’ll pay tomorrow.

Not in Hungarian, because they do different jobs:

• a marks definiteness: the
• -t marks grammatical role: direct object

So in a kiszállási díjat:

• a tells you it is a specific fee
• -t tells you it is what gets paid

Hungarian often marks both things at the same time.

Hungarian stress normally falls on the first syllable of each word.

So roughly:

• A
• KI-szál-lá-shi
• DÍ-jat
• HOL-nap
• FI-ze-tem

A few useful pronunciation points:

• sz sounds like English s
• s sounds like English sh
• j sounds like English y
• á and í are long vowels

So díjat sounds roughly like DEE-yat, and kiszállási roughly like KEE-saal-laa-shee.

Yes, very much so.

It is a common noun phrase in Hungarian for a fee connected with coming out to the customer, delivering something, or providing on-site service. Depending on the situation, English might translate it differently:

• delivery fee
• call-out fee
• service call fee
• on-site fee

So even if the Hungarian phrase stays the same, the best English translation may change with context.