Zapłacę dziewięć rachunków.

Zapłacę is the 1st person singular form of the verb zapłacić.

So it means:

• I will pay
• I’ll pay

A key point is that zapłacić is perfective, so this form refers to the future, not the present. In Polish, perfective verbs do not normally have a true present-tense meaning.

Because Polish often omits subject pronouns when they are clear from the verb ending.

The ending -ę in zapłacę already tells you the subject is I.

So:

• Zapłacę dziewięć rachunków = I will pay nine bills
• Ja zapłacę dziewięć rachunków = also correct, but now ja adds emphasis, like I will pay them

English usually needs the pronoun, but Polish often does not.

Because after numerals 5 and higher, the counted noun usually goes into the genitive plural.

So:

• jeden rachunek
• dwa rachunki
• trzy rachunki
• cztery rachunki
• pięć rachunków
• dziewięć rachunków

That is why nine bills is dziewięć rachunków, not dziewięć rachunki.

This is one of the most important number patterns in Polish.

Here, dziewięć is the correct basic counting form.

You use dziewięć with non-person nouns like rachunki in this kind of sentence.

Dziewięciu appears in other grammatical environments, especially with masculine personal nouns or in other cases. For example:

• dziewięciu studentów = nine male/mixed students

But with bills, you say:

• dziewięć rachunków

So the choice depends on both case and what kind of noun follows.

That is because Polish verbs have aspect.

• zapłacić is perfective
• perfective verbs use forms like zapłacę, zapłacisz, zapłaci to talk about a completed future action

So:

• zapłacę = I will pay
• not I am paying

Compare:

• płacę = I am paying / I pay
• będę płacić = I will be paying or I will pay with a more ongoing/process meaning
• zapłacę = I will pay it off / I will get it paid, with a sense of completion

In this sentence, the perfective form makes sense because paying the bills is seen as a completed result.

Yes. Polish word order is fairly flexible.

Zapłacę dziewięć rachunków is a normal, neutral way to say it.

You could also say:

• Dziewięć rachunków zapłacę
• Rachunków zapłacę dziewięć

But these alternative orders usually add emphasis, contrast, or depend on the context.

For a learner, the safest neutral version is:

• Zapłacę dziewięć rachunków

Because Polish uses two different patterns:

• zapłacić coś = to pay something, especially a bill, fine, debt, invoice
• zapłacić za coś = to pay for something

So:

• zapłacić rachunek = pay a bill
• zapłacić za kawę = pay for the coffee

That is why Zapłacę dziewięć rachunków is natural: the bills themselves are the direct object.

A rough pronunciation guide is:

• Zapłacę ≈ za-PWA-tseh with a nasal ending
• dziewięć ≈ JEV-yench
• rachunków ≈ ra-HOON-koof

A few sound notes:

• ł sounds like English w
• ch sounds like the ch in German Bach or Scottish loch
• ó sounds like u
• ę is a nasal vowel

Stress is usually on the next-to-last syllable:

• za-PŁA-cę
• DZIE-więć
• ra-CHUN-ków

So the whole sentence is roughly:

za-PWA-tseh JEV-yench ra-HOON-koof