Страховую выплату сделают завтра.

Because страховую выплату is the direct object of the verb сделают.

The dictionary form is:

• страховая выплата = nominative singular

In this sentence, Russian needs the accusative singular:

• страховая → страховую
• выплата → выплату

So:

• nominative: страховая выплата
• accusative: страховую выплату

Both the adjective and the noun change to match each other.

Сделают is the 3rd person plural future form of сделать.

So grammatically it means:

• they will do / they will make

In this sentence, it refers to carrying out or issuing the payment. Russian often uses сделать in business or official language where English might prefer something like make, process, or issue a payment.

Because сделать is perfective, the future is a simple future form:

• сделают = they will complete it / get it done

Russian often leaves out the subject when it is:

• unknown
• obvious from context
• unimportant

So сделают here means something like:

• they’ll do it
• the company will do it
• the relevant people will do it

This is a very common Russian pattern: a 3rd person plural verb with no expressed subject. English often translates it more naturally as a passive:

• The insurance payment will be made tomorrow.

So the Russian sentence is active in form, but English may prefer a passive translation.

It is plural because the implied subject is they.

Even though no subject is written, the verb ending tells you it is 3rd person plural:

• сделает = he/she/it will do
• сделают = they will do

Russian uses this plural form very often for an unspecified group of people, especially in situations like offices, companies, services, administration, and so on.

It could be passive, but Russian often prefers the active plural-with-no-subject pattern.

Compare:

• Страховую выплату сделают завтра.
• Страховая выплата будет сделана завтра.

Both can mean the same thing.

The difference is mostly stylistic:

• сделают завтра = more natural, lighter, common in everyday/business speech
• будет сделана завтра = more formal, heavier, more bureaucratic or written

So the original sentence sounds quite normal and natural.

This is a question of aspect.

• сделать = perfective
• делать = imperfective

Here the speaker means a completed future action: the payment will be made tomorrow. For that, Russian normally uses the perfective future:

• сделают завтра

If you said будут делать, it would suggest:

• an ongoing process
• repeated action
• focus on the activity rather than the result

That sounds much less natural here, because a payment is usually seen as a single completed event.

Yes, сделать выплату is possible, especially in formal, business, or administrative language.

But Russian can also use other verbs, for example:

• выплатить = to pay out
• перечислить = to transfer
• произвести выплату = to make/execute a payment very formally

So depending on style, you might also hear:

• Страховую выплату выплатят завтра.
• Страховую выплату перечислят завтра.
• Страховую выплату произведут завтра.

The original sentence is understandable and natural, though a bit official in tone.

Russian word order is flexible. The sentence puts завтра at the end to give it a natural focus.

This word order often feels like:

• the payment will be made — tomorrow

Other word orders are possible, for example:

• Завтра сделают страховую выплату.
• Сделают страховую выплату завтра.

They all mean roughly the same thing, but the emphasis shifts a little.

The original version is very natural if the payment is already the topic, and the new information is when it will happen.

They are:

• страховой = insurance, insured
• выплата = payment, payout
• сделать = to do, to make, to carry out
• завтра = tomorrow

In the sentence, they appear as:

• страховую = accusative singular feminine of страховой
• выплату = accusative singular of выплата
• сделают = 3rd person plural future of сделать
• завтра = unchanged adverb

It sounds neutral to somewhat official.

The phrase страховая выплата itself is a standard administrative/insurance term, so the whole sentence feels like something you might hear:

• from an insurance company
• in customer service
• in business correspondence
• in official conversation

It is not overly stiff, but it is not especially casual either.

A more everyday version might depend on context, for example if people are talking less formally about money arriving.