Die Grundgebühr ist niedrig.

Because Grundgebühr is a feminine noun in German. Its basic dictionary form is die Grundgebühr.

That means:

• die Grundgebühr = the basic fee / base charge
• in the nominative singular, feminine nouns take die

In this sentence, Grundgebühr is the subject, so nominative is used:

• Die Grundgebühr ist niedrig.

Grundgebühr usually means a basic fee, base charge, or fixed monthly charge, depending on context.

It is common in areas like:

• phone contracts
• internet plans
• utilities
• insurance
• banking

So it refers to the fee you pay as a standard charge, often regardless of usage.

In a normal German main clause, the finite verb usually comes in second position.

Here the sentence is:

• Die Grundgebühr = subject
• ist = verb
• niedrig = predicate adjective

So the structure is:

• Subject + verb + adjective

This is very similar to English:

• The basic fee is low.

Because niedrig is used after the verb ist, where it functions as a predicate adjective. In that position, German adjectives do not take endings.

So:

• Die Grundgebühr ist niedrig. = correct

But when an adjective comes before a noun, it usually does take an ending:

• die niedrige Grundgebühr = the low basic fee

So compare:

• Die Grundgebühr ist niedrig.
• Das ist eine niedrige Grundgebühr.

Yes. Niedrig is a very natural word for prices, fees, rates, levels, temperatures, and similar things.

Examples:

• Die Preise sind niedrig. = The prices are low.
• Die Zinsen sind niedrig. = Interest rates are low.

For fees, niedrig sounds normal and idiomatic.

Sometimes, but it is not exactly the same.

• niedrig means low in an objective sense
• billig usually means cheap

With a fee or charge, niedrig is often the better choice because it focuses on the amount itself.

Compare:

• Die Grundgebühr ist niedrig. = The basic fee is low.
• Das ist billig. = That is cheap.

Also, billig can sometimes sound slightly negative, like cheap in quality, depending on context. Niedrig is more neutral here.

Because all nouns are capitalized in German.

So:

• die Grundgebühr → noun, capitalized
• niedrig → adjective, not capitalized unless it starts the sentence

This is one of the most important spelling rules in German.

A rough guide is:

• Grund sounds somewhat like groont but with a shorter vowel
• Gebühr sounds roughly like guh-BYOOR, with the stress on the second part

A few pronunciation points:

• ü is a front rounded vowel that English does not really have
• Gebühr is stressed on -bühr
• Grundgebühr is a compound noun, so you can hear the parts Grund + Gebühr

A rough English-style approximation would be:

• GROONT-guh-BYOOR

Not perfect, but helpful as a start.

Yes. It is made up of:

• Grund = basic, base, foundation
• Gebühr = fee

German often combines words into one longer noun. The last part usually tells you the core meaning:

• Gebühr is the main noun
• Grund- modifies it

So Grundgebühr literally means something like base fee or basic fee.

Normally, no. In standard German, singular countable nouns usually need an article or another determiner.

So the normal sentence is:

• Die Grundgebühr ist niedrig.

Without the article, it sounds incomplete in most contexts.

You might omit the article only in special styles such as headlines, notes, or very telegraphic language:

• Grundgebühr niedrig But that is not normal full-sentence German.

It is nominative, because it is the subject of the sentence.

You can see the structure like this:

• Die Grundgebühr = subject
• ist = verb
• niedrig = description of the subject

Since the subject is nominative, the feminine article is die.

Yes, that is possible. Gering can also mean low or small in amount.

However, there is a slight difference in feel:

• niedrig is the most straightforward and common word for low
• gering can sound a bit more formal or abstract

So:

• Die Grundgebühr ist niedrig. = very natural, everyday
• Die Grundgebühr ist gering. = also correct, a bit more formal

You would usually put the verb first:

• Ist die Grundgebühr niedrig? = Is the basic fee low?

This is a standard yes/no question pattern in German:

• statement: Die Grundgebühr ist niedrig.
• question: Ist die Grundgebühr niedrig?

Yes, but the verb still has to stay in second position in a normal statement.

For example:

• Die Grundgebühr ist niedrig. = normal
• Niedrig ist die Grundgebühr. = possible, but marked and unusual; it emphasizes niedrig

The neutral version is the original one. German allows some flexibility, but not all word orders sound equally natural.

The plural is:

• die Grundgebühren

Example:

• Die Grundgebühren sind niedrig. = The basic fees are low.

Notice:

• singular: die Grundgebühr ist niedrig
• plural: die Grundgebühren sind niedrig

The verb changes from ist to sind in the plural.