Nedbetalingsplanen har et terminbeløp hver måned.

Because Norwegian usually writes compound nouns as a single word.

So:

• nedbetaling = repayment / paying off debt
• plan = plan

Together they form nedbetalingsplan = repayment plan.

Then the definite ending is added:

• nedbetalingsplan = a repayment plan
• nedbetalingsplanen = the repayment plan

This is very normal in Norwegian. Where English often uses several words, Norwegian often combines them into one.

The -s- is a linking sound/letter used in many Norwegian compounds. It does not mean possession here.

So this is:

• nedbetaling
  • s
    • plan → nedbetalingsplan

You can think of it as a glue letter that makes the compound sound more natural. English learners often mistake it for an apostrophe-s, but it is not like English possession.

The ending -en marks the definite form of the noun.

• en plan = a plan
• planen = the plan

Since nedbetalingsplan is built around plan, it behaves like a noun of the same gender:

• en nedbetalingsplan = a repayment plan
• nedbetalingsplanen = the repayment plan

Norwegian often puts the at the end of the noun instead of using a separate word like English.

Yes. Har is the present tense of å ha = to have.

In this sentence, har means something like:

• has
• contains
• includes

So the sentence is saying that the repayment plan includes a certain payment amount every month.

This may sound slightly different from the most natural English phrasing, but it is completely normal Norwegian.

Terminbeløp is a financial term. It usually means the amount due for each payment period, often an installment amount.

It is made up of:

• termin = installment period / due period
• beløp = amount

So terminbeløp is the amount you pay for each term or installment.

In loan language, this is often the regular amount due each month, though the exact meaning can depend on the financial context.

Because beløp is a neuter noun in Norwegian, so it takes et.

• et beløp = an amount
• et terminbeløp = an installment amount

In compounds, the last part usually determines the gender. Since the head noun is beløp, the whole compound is neuter too.

That is why it is:

• et terminbeløp
• not en terminbeløp

Hver måned means every month or each month.

Norwegian uses hver with a singular noun:

• hver dag = every day
• hver uke = every week
• hver måned = every month

So even though the meaning is repeated time, the noun stays singular after hver.

Because hver måned works directly as a time expression, much like every month in English.

You do not need a preposition such as i here.

Compare:

• hver måned = every month
• hver uke = every week

This is normal Norwegian usage.

The sentence has a very standard Norwegian word order:

• Nedbetalingsplanen = subject
• har = verb
• et terminbeløp = object
• hver måned = time expression

So it follows the basic pattern:

Subject + verb + object + time

Nothing unusual is happening here. It is a good example of a straightforward Norwegian main clause.

Yes, it sounds somewhat financial or administrative because of words like nedbetalingsplan and terminbeløp.

In everyday speech, people might say something simpler, depending on context, such as:

• Nedbetalingsplanen har en fast betaling hver måned.
• Du betaler et fast beløp hver måned.

But the original sentence is perfectly natural in banking, loan, or contract contexts.

Yes, often it could.

For example:

• Nedbetalingsplanen har et månedlig terminbeløp.

That would mean something like The repayment plan has a monthly installment amount.

The difference is mostly stylistic:

• hver måned focuses on repetition in time
• månedlig is a more compact adjective meaning monthly

Both are possible, but hver måned is very clear and easy to understand.