Beregningsgrunnlaget er høyt.

Because Norwegian usually writes compound nouns as a single word.

Here, beregningsgrunnlaget is built from:

• beregning = calculation
• -s- = a linking element
• grunnlag = basis/foundation
• -et = the definite singular ending

So the core noun is grunnlag, and the whole compound behaves like one noun. This is very normal in Norwegian, even when English would often use several words.

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

So beregning + grunnlag becomes beregningsgrunnlag. You just have to learn these case by case, because some compounds use a linking sound and some do not.

The ending -et marks the noun as definite singular.

Compare:

• et beregningsgrunnlag = a calculation basis
• beregningsgrunnlaget = the calculation basis

Since grunnlag is a neuter noun, its definite singular ending is -et. In simple noun phrases, Norwegian usually attaches definiteness to the noun itself instead of using a separate word like English the.

Because høyt is the neuter singular form of the adjective høy.

The noun beregningsgrunnlag is neuter because the head word grunnlag is neuter:

• et grunnlag
• therefore et beregningsgrunnlag

When an adjective is used after er as a predicative adjective, it agrees with the noun in gender and number:

• grunnlaget er høyt
• satsen er høy
• tallene er høye

A very important point: even though beregningsgrunnlaget is definite, the adjective stays høyt, not høye, because predicative adjectives do not show definiteness the way attributive adjectives do.

Because this is a full sentence with a linking verb:

• Beregningsgrunnlaget er høyt.

Here, høyt comes after er because it is describing the subject through the verb to be.

If you put the adjective before the noun, you get a noun phrase instead:

• et høyt beregningsgrunnlag = a high calculation basis
• det høye beregningsgrunnlaget = the high calculation basis

So:

• Beregningsgrunnlaget er høyt = a complete sentence
• det høye beregningsgrunnlaget = just a noun phrase

Er is the present tense of å være, meaning to be.

So:

• er = is / am / are, depending on context

In this sentence, it simply means is:

• Beregningsgrunnlaget er høyt = The calculation basis is high

Yes. This is the standard pattern:

• Subject + verb + complement
• Beregningsgrunnlaget + er + høyt

That is completely normal Norwegian word order. Norwegian also follows the V2 rule, which means the finite verb is usually in the second position in main clauses. For example:

• I år er beregningsgrunnlaget høyt.

Here I år comes first, so er still stays in second position.

Not usually. It sounds fairly formal and technical.

You are likely to see it in contexts such as:

• finance
• tax
• insurance
• payroll
• benefits
• legal or administrative texts

So the grammar is ordinary, but the noun itself belongs more to official or professional language than casual conversation.

The main forms are:

• et beregningsgrunnlag = indefinite singular
• beregningsgrunnlaget = definite singular
• beregningsgrunnlag = indefinite plural
• beregningsgrunnlagene = definite plural

You can also see the adjective change in the plural:

• Beregningsgrunnlagene er høye.

By itself, høyt just means high. It does not automatically mean too high.

If you want to say too high, Norwegian normally uses:

• for høyt

So:

• Beregningsgrunnlaget er høyt. = The calculation basis is high.
• Beregningsgrunnlaget er for høyt. = The calculation basis is too high.