Wij betalen nul euro.

Yes. Wij and we both mean we.

• wij is the fuller, more emphatic form
• we is the more common everyday form in speech and informal writing

So this sentence can also be:

• We betalen nul euro.

Using wij can sound a bit more deliberate or contrastive, as if you are stressing we.

Because the subject is wij (we), and in the present tense Dutch uses betalen for plural subjects.

Present tense of betalen:

• ik betaal = I pay
• jij betaalt = you pay
• hij/zij betaalt = he/she pays
• wij betalen = we pay
• jullie betalen = you all pay
• zij betalen = they pay

So Wij betalen is the correct form.

Yes. Wij betalen nul euro is in the simple present tense.

Depending on context, the Dutch present tense can mean:

• something happening now
• something habitual
• sometimes even a future situation

For example, it could mean:

• we are paying zero euros
• we pay zero euros
• we will pay zero euros

The exact time usually depends on context.

In Dutch, after an exact number, amounts of money are usually written with the currency name in an unchanged form:

• één euro
• twee euro
• tien euro
• nul euro

So nul euro is correct.

You may still see euro's when people are talking about euros more generally, not as a fixed counted amount, for example:

• Ik heb nog wat euro's. = I still have some euros.

But with a specific amount, euro is the normal form.

Because Dutch normally uses a number directly before the noun, without an article.

Compare:

• een boek = one book
• drie boeken = three books
• nul euro = zero euro

So you do not add een or de/het before nul euro in this kind of sentence.

Yes, and it is very natural. But there is a small difference in focus.

• Wij betalen nul euro = we pay exactly zero euros
• Wij betalen geen euro = we do not pay any euro / we pay nothing

nul euro sounds more exact, numerical, or factual. geen euro sounds a bit more natural in many everyday situations.

Both are correct, but the nuance is slightly different.

Yes. In a normal Dutch main clause, the usual order is:

subject + verb + rest

So:

• Wij betalen nul euro.

That is the basic word order.

If you move another element to the front, the verb must still stay in second position:

• Vandaag betalen wij nul euro. = Today we pay zero euros.

And in a yes/no question, the verb comes first:

• Betalen wij nul euro? = Are we paying zero euros?

A rough guide is:

• wij ≈ like English why, but with a Dutch w/v-like sound
• betalen ≈ buh-TAA-luh(n)
• nul ≈ a short sound that does not exist exactly in English; roughly nül
• euro ≈ YUR-oh or more accurately YOO-roh with rounded lips

A very rough full approximation: vye buh-TAA-luh(n) nül YOO-roh

The hardest parts for English speakers are usually:

• wij
• the vowel in nul
• the first sound of euro

Normally, no. Dutch usually needs an explicit subject in a sentence like this.

So you say:

• Wij betalen nul euro.

Not:

• Betalen nul euro.

You can leave out the subject only in special cases, such as commands, notes, headlines, or very informal shorthand. In a normal full sentence, the subject should be there.