Reiseformålet står i reiseregningen.

Because Norwegian very often forms compound nouns as single words.

• reise + formål = reiseformål
• reise + regning = reiseregning

In these compounds, the last part is the main noun, and the first part describes it.

So:

• reiseformål = trip/travel purpose
• reiseregning = travel expense report / travel claim

This is much more normal in Norwegian than writing them as separate words.

The ending -et is the definite singular ending for a neuter noun.

The main noun here is formål, and formål is neuter:

• et formål = a purpose
• formålet = the purpose

Since the compound takes its gender from the last element, you get:

• et reiseformål = a travel purpose
• reiseformålet = the travel purpose / the purpose of the trip

So -et here is basically the Norwegian way of saying the.

Because regning is a common-gender noun, not a neuter noun.

Its forms are:

• en regning = a bill/account/report
• regningen = the bill/account/report

So in the compound:

• en reiseregning = a travel expense report
• reiseregningen = the travel expense report

Again, the compound gets its gender from the final noun, regning.

In Norwegian, the definite article is usually attached to the end of the noun.

So instead of a separate word like English the, Norwegian often uses endings:

• formålet = the purpose
• regningen = the report/bill

That is why you do not see a separate article before the noun.

A separate word such as den/det is usually added when there is an adjective, for example:

• det viktige reiseformålet = the important travel purpose

Yes, literally står means stands, but in Norwegian it is also commonly used about text or information.

So står i reiseregningen does not mean that something is physically standing inside it. It means:

• is written in
• appears in
• is stated in

This is a very common usage in Norwegian.

Examples:

• Det står i boka. = It says so in the book.
• Hva står det her? = What does it say here?

Here i means in, and it is used because the information is understood as being contained within the document.

So:

• står i reiseregningen = is written in the travel expense report

This is natural Norwegian when talking about information in a document, text, report, law, letter, and so on.

This is the normal Norwegian word order for a main clause:

subject + verb + other elements

So here:

• Reiseformålet = subject
• står = verb
• i reiseregningen = prepositional phrase

Norwegian main clauses follow the verb-second rule, often called V2. That means the finite verb usually comes in the second position.

If you move another element to the front, the verb still stays second:

• I reiseregningen står reiseformålet.

That is also correct, but now the sentence starts with the prepositional phrase.

Yes. Both are possible.

• reiseformålet = a compact compound noun
• formålet med reisen = the purpose of the trip/journey

The compound version often sounds more official, administrative, or concise. That is why it fits well in formal contexts such as forms, reports, and work-related language.

So these are similar in meaning, but reiseformålet is the more compressed, bureaucratic-style version.

It usually refers to a travel expense report or expense claim—a document where someone lists costs from a trip, especially a work trip, so they can be reimbursed.

So it is not just any random bill for travel. In many contexts, it means the formal document used to report travel expenses.

That is why the sentence sounds like office or administrative language.

The key forms are:

• å reise = to travel
• et formål = a purpose
• en regning = a bill / account / report

And the compounds are:

• et reiseformål = a travel purpose
• en reiseregning = a travel expense report

In the sentence, both compound nouns are in the definite singular:

• reiseformålet
• reiseregningen