Premi dibayar setiap bulan.

Because dibayar is the passive form of bayar.

• membayar = to pay, to be paying, pays
  
  • active: the subject does the action
• dibayar = to be paid, is paid
  
  • passive: the focus is on the thing receiving the action

So in Premi dibayar setiap bulan, the focus is on premi (the premium), not on who pays it.

Compare:

• Nasabah membayar premi setiap bulan. = The customer pays the premium every month.
• Premi dibayar setiap bulan. = The premium is paid every month.

Yes. It is a passive sentence.

The pattern is:

• Premi = the thing affected by the action
• dibayar = is paid
• setiap bulan = every month

So the structure is basically:

[thing] + [passive verb] + [time expression]

This is very common in Indonesian, especially in formal writing and general statements.

By itself, dibayar does not show tense the way English does.

Indonesian verbs usually do not change form for present, past, or future. The time is understood from context or from time words.

So Premi dibayar setiap bulan is understood as:

• is paid every month
• or more naturally in English, the premium is paid monthly

Because setiap bulan shows a repeated/habitual action, English usually uses the present habitual meaning.

If you wanted to make time clearer, Indonesian could add words like:

• sudah = already
• akan = will
• sedang = in the process of

But in this sentence, setiap bulan already makes the meaning clear.

In this sentence, premi most commonly means an insurance premium or another regular premium payment.

So Premi dibayar setiap bulan would usually mean something like:

• The premium is paid every month
• Insurance premiums are paid monthly

In other contexts, premi can sometimes have related meanings such as a premium, bonus, or surcharge, depending on the topic. But with dibayar setiap bulan, the insurance/payment meaning is the most likely one.

Setiap bulan means every month.

• setiap = every, each
• bulan = month

It functions as a time expression and usually comes after the verb or after the main part of the sentence.

So:

• Premi dibayar setiap bulan. = The premium is paid every month.

You can think of it as giving the frequency of the action.

Because Indonesian usually does not use a verb like English to be in this kind of sentence.

English needs:

• The premium is paid every month.

Indonesian simply says:

• Premi dibayar setiap bulan.

That is completely normal. Indonesian often leaves out words equivalent to is / am / are unless a different structure specifically requires something else.

The sentence does not say.

That is one reason passive is used here: the person or party doing the action is either:

• unknown,
• obvious from context,
• or not important.

So Premi dibayar setiap bulan focuses on the fact that the premium gets paid every month, not on who pays it.

If you wanted to mention the payer, Indonesian could say something like:

• Premi dibayar oleh nasabah setiap bulan. = The premium is paid by the customer every month.

Here oleh means by in a passive sentence.

Yes. Indonesian nouns usually do not change form for singular and plural.

So premi can mean:

• the premium
• a premium
• premiums

The exact meaning depends on context.

In a general statement like Premi dibayar setiap bulan, English might translate it as:

• The premium is paid every month, if talking about one policy
• Premiums are paid every month, if talking generally

Both are possible depending on the situation.

Usually Premi dibayar setiap bulan is the simpler and more common choice.

Both dibayar and dibayarkan can appear, but they are not always exactly the same in feel.

• dibayar = is paid
• dibayarkan = is paid out / is paid, sometimes with a slightly more formal or transactional nuance

In many everyday cases, dibayar is the most straightforward form and sounds natural.

Yes. tiap and setiap both mean every/each.

So these are both correct:

• Premi dibayar setiap bulan.
• Premi dibayar tiap bulan.

The version with setiap may sound a little more formal or neutral, while tiap is slightly shorter and often feels a bit more conversational.

The basic sentence order here is very natural:

• Premi dibayar setiap bulan.

You can change the order for emphasis, but the original order is the most standard.

For example:

• Setiap bulan, premi dibayar.

This is possible, but it sounds more marked or literary because it emphasizes the time first.

So for learners, the safest pattern is:

noun + passive verb + time expression

Yes, slightly.

• Premi dibayar setiap bulan. = Premium is paid every month / The premium is paid every month / Premiums are paid every month
• Premi itu dibayar setiap bulan. = That premium / the premium is paid every month

Adding itu makes the noun more specific and definite. It often means that or the depending on context.

So premi itu refers to a particular premium already known in the conversation.

It sounds neutral to somewhat formal, and it is very natural in contexts like:

• insurance documents
• billing information
• financial explanations
• general written statements

It is not slangy or unusually stiff. It is a standard kind of Indonesian sentence, especially because passive forms are very common in formal and informational language.