Согласно решению страховщика, страховую выплату сделают завтра.

Because согласно normally takes the dative case in modern Russian.

• решение = nominative
• решению = dative

So:

• согласно решению = according to the decision

This is one of those case patterns you simply have to learn with the word:

• согласно закону = according to the law
• согласно договору = according to the contract
• согласно правилам = according to the rules

Because страховщика shows possession or relationship: the insurer’s decision / the decision of the insurer.

The noun решение is followed by a dependent noun in the genitive case:

• решение кого? = decision of whom?
• страховщика = of the insurer

So:

• решение страховщика = the insurer’s decision

This is very common in Russian:

• книга студента = the student’s book
• ответ учителя = the teacher’s answer

It is in the accusative case because it is the direct object of the verb сделают.

Ask:

• сделают что? = will do/make what?
• страховую выплату = the insurance payment / payout

Here the noun выплата is feminine, singular, inanimate:

• nominative: страховая выплата
• accusative: страховую выплату

So the ending changes because the phrase is the object of the action.

Because adjectives must agree with the noun they describe in gender, number, and case.

The noun is выплату, which is:

• feminine
• singular
• accusative

So the adjective must match it:

• nominative: страховая выплата
• accusative: страховую выплату

This is normal adjective agreement in Russian.

Сделают is 3rd person plural future of сделать.

Literally, it means they will do/make. But in Russian, 3rd person plural is often used when the specific people are not named or not important. In English, we might translate it more impersonally:

• The insurance payment will be made tomorrow.
• or They will make the insurance payment tomorrow.

So the sentence does not focus on exactly who will do it. It just means that the payment is expected to happen.

Yes. Russian often uses сделать in a broad, practical sense: to do, to make, to carry out.

So страховую выплату сделают means something like:

• they will make the insurance payout
• they will carry out the payment

In more formal or bureaucratic Russian, you might also see:

• страховую выплату произведут
• выплата будет произведена

Those sound more official. Сделают is understandable and natural, though a bit less formal.

Because завтра shows that the action will happen in the future.

The verb сделать is perfective. Perfective verbs form the simple future directly:

• сделаю = I will do
• сделаешь = you will do
• сделают = they will do

This is different from imperfective verbs, which use быть + infinitive for future:

• будут делать = they will be doing / they will do

Here сделают suggests a completed result: the payment will get done.

Because сделают focuses on the action as a completed event/result, which fits well with a one-time payment.

Compare:

• сделают = they will do it, and it will be completed
• будут делать = they will be doing it / will be in the process of doing it

For a single insurance payout, Russian strongly prefers the perfective сделают.

Here согласно means according to.

So:

• Согласно решению страховщика = According to the insurer’s decision

It introduces the basis or authority for what follows.

Be careful not to confuse it with similar English structures. In Russian, согласно is typically followed by the dative:

• согласно плану = according to the plan
• согласно приказу = according to the order

Because Согласно решению страховщика is an introductory prepositional phrase at the beginning of the sentence.

Russian often separates such introductory circumstances with a comma, especially when they are placed before the main clause:

• Согласно решению страховщика, ...

The main statement is:

• страховую выплату сделают завтра

The opening phrase gives the basis/reason/source, so the comma helps mark that structure clearly.

Yes. Russian word order is flexible, though each version may sound slightly different in emphasis.

Original:

• Согласно решению страховщика, страховую выплату сделают завтра.

Other possible versions:

• Страховую выплату согласно решению страховщика сделают завтра.
• Завтра страховую выплату сделают согласно решению страховщика.

The original is very natural because it first gives the official basis, then the main information.

Putting завтра at the end gives it a natural informational focus: the important new detail is when the payment will be made.

Russian often places newer or more important information later in the sentence.

So this order feels natural:

• According to the insurer’s decision, the insurance payment will be made tomorrow.

If you move завтра earlier, the meaning stays the same, but the emphasis changes.

No, they are different insurance terms.

• страховщик = insurer, insurance company/provider
• страхователь = policyholder, the person or entity that takes out the insurance

So in this sentence, решение страховщика means the decision made by the insurer, not by the insured person.

It is grammatically active in Russian because the verb is сделают = they will do/make.

But in meaning, it often works like an impersonal/passive-style statement in English:

• The insurance payment will be made tomorrow.

Russian often uses this kind of active 3rd person plural instead of a passive construction.

A more explicitly passive Russian version would be:

• Страховая выплата будет сделана завтра.
• Страховая выплата будет произведена завтра.

All of these can express a similar idea, though the style differs.