Wieczorem podsumuję wydatki.

Wieczorem means in the evening, this evening, or sometimes tonight, depending on context.

The basic noun is wieczór = evening.
In this sentence, Polish uses wieczorem as a time expression meaning during the evening. So:

• wieczór = evening
• wieczorem = in the evening

Podsumuję is the 1st person singular form of the verb podsumować.

It means:

• I will summarize
• I will total up
• I will review/sum up

The ending -ę tells you the subject is I, so Polish does not need a separate word for I here.

Because podsumować is a perfective verb.

In Polish, perfective verbs do not normally have a true present tense for ongoing actions. Their “present-looking” forms usually refer to the future.

So:

• podsumuję = I will sum up
• not I sum up in the present

This is a very common feature of Polish verbs.

Polish often leaves out subject pronouns because the verb ending already shows who is doing the action.

Here, podsumuję already means I will sum up, so ja is unnecessary.

You could say:

• Ja wieczorem podsumuję wydatki.

But that would usually add emphasis, like:

• I will sum up the expenses this evening.

The dictionary form is wydatek, which means expense or expenditure.

In the sentence, wydatki is the plural form:

• wydatek = expense
• wydatki = expenses

So the sentence is talking about more than one expense.

Here wydatki is in the accusative plural, because it is the direct object of the verb podsumuję.

You are summing up what?
→ wydatki

A useful detail: for many inanimate nouns in the plural, the nominative and accusative forms are the same, which is why wydatki looks the way it does here.

Because Polish forms the future differently depending on whether the verb is perfective or imperfective.

With a perfective verb like podsumować, Polish uses a simple future:

• podsumuję = I will sum up

With an imperfective verb, Polish uses będę + infinitive or będę + past-like form:

• będę podsumowywać = I will be summing up / I will sum up (with an imperfective nuance)

So będę podsumować is not correct.

It suggests a completed result.

So Wieczorem podsumuję wydatki means that by doing this action, the speaker intends to finish summing up the expenses.

It sounds like:

• I’ll get the expense summary done this evening.

If you used an imperfective verb instead, the focus would be more on the process, repetition, or duration rather than the completed result.

Yes. Polish word order is flexible, and changing it can shift emphasis.

This version:

• Wieczorem podsumuję wydatki.

is natural and puts the time frame first: In the evening / This evening, I’ll sum up the expenses.

Other possible orders:

• Podsumuję wydatki wieczorem.
  More neutral in some contexts; the action comes first.

• Wydatki podsumuję wieczorem.
  Emphasizes the expenses, perhaps in contrast to something else.

So the meaning stays similar, but the focus changes.

It can mean any of those, depending on context.

Polish often does not force the same distinction that English does. So:

• wieczorem can be a general time expression: in the evening
• in context, it can also mean this evening
• sometimes English would naturally translate it as tonight

The surrounding conversation usually makes the exact meaning clear.

Any of those are possible, because Polish has no articles like a or the.

So wydatki could mean:

• expenses
• the expenses
• my expenses
• the expenditures

Context tells you which one is meant. In a natural everyday context, this sentence often suggests something like:

• I’ll go over my expenses this evening.

A rough pronunciation guide:

• Wieczorem → vye-CHO-rem
• podsumuję → pot-soo-MOO-yeh
• wydatki → vih-DAT-kee

Stress in Polish is usually on the second-to-last syllable:

• wieczoREM
• podsuMUJĘ
• wyDATki

The final ę in podsumuję is a nasal vowel, though in normal speech its pronunciation can vary somewhat depending on the sound environment.