Den onödiga utgiften står på kontoutdraget.

This is a very common feature of Swedish called double definiteness.

When a noun is definite and has an adjective before it, Swedish usually marks definiteness twice:

• with a definite article: den
• and with the definite ending on the noun: utgiften

So:

• utgift = expense
• utgiften = the expense
• den onödiga utgiften = the unnecessary expense

In English, you only need the, but Swedish normally needs both parts in this kind of phrase.

Because the adjective is in a definite noun phrase.

Compare:

• en onödig utgift = an unnecessary expense
• den onödiga utgiften = the unnecessary expense

In Swedish, adjectives often change form depending on the noun phrase. In a definite phrase, the adjective usually takes -a:

• onödig → onödiga

So onödiga here does not mean plural by itself; it is the normal form used with a definite noun phrase.

The base form is utgift, which means expense.

Then:

• utgift = expense
• utgiften = the expense

This noun is a common gender noun in Swedish, so its definite singular ending is -en.

The base form is kontoutdrag, meaning bank statement or account statement.

Then:

• kontoutdrag = a bank statement
• kontoutdraget = the bank statement

This noun is a neuter gender noun, so the definite singular ending is -et.

Because Swedish nouns belong to different grammatical genders.

The two main genders are:

• common gender (often called en-words)
• neuter gender (often called ett-words)

Here:

• utgift is an en-word → utgiften
• kontoutdrag is an ett-word → kontoutdraget

So the different endings show the noun class.

Literally, yes: står is from stå, meaning to stand.

But in Swedish, stå is also often used for text or information that appears somewhere, especially on paper, signs, screens, labels, or documents.

So:

• Det står på skylten = It says so on the sign
• Det står i mejlet = It says so in the email
• Den onödiga utgiften står på kontoutdraget = The unnecessary expense appears/is listed on the bank statement

So in this sentence, står is best understood as is shown, appears, or is listed.

Because Swedish often uses på for information shown on a surface or document.

Examples:

• på en lista = on a list
• på en sida = on a page
• på kvittot = on the receipt
• på kontoutdraget = on the bank statement

Even when English might sometimes say in or on depending on context, Swedish often prefers på for written information visible on a document.

Yes. Swedish very often forms long compound nouns.

Here:

• konto = account
• utdrag = extract, statement

Together:

• kontoutdrag = account statement / bank statement

This is very normal in Swedish. English often writes these as two words, but Swedish usually writes them as one.

The sentence follows normal Swedish main-clause word order:

• Den onödiga utgiften = subject
• står = verb
• på kontoutdraget = adverbial/prepositional phrase

So the structure is:

Subject + Verb + Other information

This is the standard pattern in simple Swedish statements.

Yes. A word-for-word translation might sound slightly odd in English.

Natural English translations could be:

• The unnecessary expense appears on the bank statement.
• The unnecessary expense is listed on the bank statement.
• The unnecessary expense shows up on the bank statement.

That is because Swedish står på is often more idiomatic than a literal English stands on.

Because Swedish usually puts definiteness at the end of the noun:

• kontoutdrag = bank statement
• kontoutdraget = the bank statement

Unlike English, Swedish does not usually need a separate word like the if there is no adjective before the noun.

So:

• på kontoutdraget = on the bank statement

But with an adjective, Swedish often uses double definiteness, as in:

• det nya kontoutdraget = the new bank statement

Yes. Onödig usually means unnecessary, but depending on context it can also feel like:

• needless
• pointless
• avoidable
• not needed

So den onödiga utgiften could mean an expense that should not have happened or was not worth it.

The indefinite version would be:

En onödig utgift står på ett kontoutdrag.

That means:

An unnecessary expense appears on a bank statement.

Compare the forms:

• en onödig utgift = an unnecessary expense
• den onödiga utgiften = the unnecessary expense

and

• ett kontoutdrag = a bank statement
• kontoutdraget = the bank statement

This is a useful way to see how the article, adjective, and noun endings change.