Die Firma zieht Lohnsteuer und Sozialversicherungsbeitrag vom Bruttogehalt ab.

Because the verb here is abziehen, which is a separable verb.

• infinitive: abziehen
• in a main clause: zieht ... ab

So:

• Die Firma zieht ... ab.

This is a very common German pattern. The main part of the verb is conjugated and stays in the usual verb position, while the prefix goes to the end.

Compare:

• Ich rufe dich an. = I call you up / I’m calling you
• Er kauft Brot ein. = He shops for / buys groceries
• Die Firma zieht Steuern ab.

In this context, abziehen means to deduct or to withhold.

A useful pattern is:

• etwas von etwas abziehen = to deduct something from something

So the structure is:

• Lohnsteuer und Sozialversicherungsbeitrag = the things being deducted
• vom Bruttogehalt = from the gross salary

In other contexts, abziehen can also mean other things, such as to pull off, to remove, or even to leave/depart in certain situations. But in payroll or finance, deduct is the right meaning.

Because vom is a contraction of von dem:

• von dem → vom

Also, the preposition von takes the dative case, so das Bruttogehalt becomes dem Bruttogehalt.

So:

• von dem Bruttogehalt
• contracted: vom Bruttogehalt

This contraction is very common and usually preferred in normal German.

Because it follows the preposition von, and von always takes the dative.

The phrase is:

• etwas von etwas abziehen

Here:

• vom Bruttogehalt = from the gross salary

Case breakdown:

• Die Firma = nominative subject
• Lohnsteuer und Sozialversicherungsbeitrag = accusative object
• vom Bruttogehalt = dative after von

German often omits articles with abstract, uncountable, or category-type nouns, especially in formal or technical language.

So Lohnsteuer can appear without an article when speaking generally about that type of deduction.

The sentence sounds somewhat like a payroll statement or official explanation.

That said, in more natural everyday phrasing, many speakers might also say:

• die Lohnsteuer
• den Sozialversicherungsbeitrag
• or more commonly die Sozialversicherungsbeiträge

So the article omission is not impossible, but it gives the sentence a slightly formal or list-like feel.

That is a very reasonable question. In real-life German, Sozialversicherungsbeiträge in the plural is often more idiomatic, because social insurance usually includes several contributions.

So many native speakers would find this more natural:

• Die Firma zieht Lohnsteuer und Sozialversicherungsbeiträge vom Bruttogehalt ab.

The singular Sozialversicherungsbeitrag can still appear if the speaker is treating it as a single category or bundle, but the plural is often more common in practice.

So if this sentence sounds a little unusual to you, you are not imagining it.

They are in the accusative, because they are the direct object of abziehen.

What is being deducted?

• Lohnsteuer
• Sozialversicherungsbeitrag

In this sentence, you cannot see a special article ending that clearly marks the accusative, because there is no article before them. But syntactically, they function as accusative objects.

Because the subject is singular:

• Die Firma = the company

So the verb must agree with die Firma, not with the things being deducted.

• Die Firma zieht ... ab.

If the subject were plural, the verb would change:

• Die Firmen ziehen ... ab.

It is a classic German compound noun. You can break it down like this:

• Sozial = social
• Versicherung = insurance
• Beitrag = contribution/payment

Together:

• Sozialversicherungsbeitrag = social insurance contribution

German forms long nouns by combining smaller nouns very freely. The last part is the core noun, so here the main word is:

• Beitrag = contribution

Everything before it describes what kind of contribution it is.

The same applies to:

• Lohnsteuer = wage tax / payroll tax
• Bruttogehalt = gross salary

This is a good vocabulary question because both relate to pay.

Very roughly:

• Lohn traditionally refers more to wages, often linked to hourly or manual work
• Gehalt usually refers to a salary, often fixed monthly pay

But in compounds, older or established forms remain common, so:

• Lohnsteuer is the standard term for wage/payroll tax
• Bruttogehalt is a standard term for gross salary

So even though both are pay-related words, they appear in different set expressions.

Because in a main clause, German usually places the finite verb in the second position, and with a separable verb, the prefix goes to the end.

Structure:

1. Die Firma = position 1
2. zieht = finite verb in position 2
3. middle part of the sentence
4. ab = separable prefix at the end

So:

• Die Firma zieht Lohnsteuer und Sozialversicherungsbeitrag vom Bruttogehalt ab.

If you used an infinitive or participle, the parts would come together again:

• Die Firma muss Lohnsteuer abziehen.
• Die Firma hat Lohnsteuer abgezogen.

Yes. Von dem Bruttogehalt is grammatically correct.

But in normal German, vom is much more natural and much more common.

So both are correct:

• vom Bruttogehalt
• von dem Bruttogehalt

In most everyday and written usage, native speakers would strongly prefer vom.

Yes.

• Bruttogehalt = gross salary, before deductions
• Nettogehalt = net salary, after deductions

This sentence uses Bruttogehalt because taxes and contributions are typically deducted from the gross amount before you get the net amount.

So the sentence structure reflects a very common payroll idea:

• gross pay
• minus tax and insurance contributions
• equals net pay

Yes, very easily. The pattern is:

• Jemand zieht etwas von etwas ab.

Examples:

• Die Bank zieht Gebühren vom Konto ab.
• Der Arbeitgeber zieht Steuern vom Lohn ab.
• Man zieht Rabatte vom Preis ab.

So this sentence is useful not just for payroll vocabulary, but also for learning a very common grammar pattern with abziehen.