Взнос можно оплатить завтра.

Взнос means a payment, fee, contribution, or installment, depending on context.

Common possibilities:

• membership fee
• down payment
• monthly installment
• contribution to a fund or organization

So in this sentence, it is the thing being paid.

Можно is an impersonal word meaning it is possible, one can, or sometimes it is allowed.

So:

• можно оплатить = it is possible to pay / one can pay
• может оплатить = he/she/it can pay

That means the sentence is not talking about a specific person. It is making a general statement: the payment can be made tomorrow.

After можно, Russian usually uses the infinitive.

Pattern:

• можно + infinitive

Examples:

• можно прийти = one can come
• можно купить = one can buy
• можно оплатить = one can pay

So оплатить is there because it follows можно.

Оплатить is perfective, while оплачивать is imperfective.

Here, оплатить is used because the sentence refers to a single completed payment: paying the fee tomorrow as one finished action.

Compare:

• Взнос можно оплатить завтра.
  = The fee can be paid tomorrow.
  Focus on completing the payment.

• Взнос можно оплачивать частями.
  = The fee can be paid in parts.
  Focus on the process/repeated action.

So the perfective verb fits best here.

It is in the accusative case, because it is the direct object of оплатить.

However, взнос is an inanimate masculine noun, so its accusative singular looks exactly like the nominative singular:

• nominative: взнос
• accusative: взнос

So even though the form does not change, the grammatical role does.

Russian often leaves out the person when the meaning is general or impersonal.

This sentence does not mean:

• I can pay it tomorrow
• you can pay it tomorrow

Instead, it means something more general like:

• the fee can be paid tomorrow
• it is possible to pay the fee tomorrow

That is why there is no explicit subject.

It can suggest either, depending on context.

Можно can mean:

• it is possible
• one can
• it is allowed

So Взнос можно оплатить завтра could mean:

• it is possible to pay the fee tomorrow
• it is permitted/acceptable to pay the fee tomorrow

Usually the surrounding context tells you which nuance is intended.

Not normally. The more natural verb here is оплатить.

A very important Russian pattern is:

• оплатить что?
  = to pay for something directly
  Example: оплатить взнос, оплатить счёт

• заплатить за что?
  = to pay for something with за + accusative
  Example: заплатить за билет, заплатить за обучение

So:

• оплатить взнос = correct
• заплатить за взнос = usually not the natural choice here
• заплатить взнос does exist in some contexts, but оплатить взнос is the safer and more standard phrasing for learners

Yes, you can move it. Russian word order is flexible.

These are all possible:

• Взнос можно оплатить завтра.
• Завтра можно оплатить взнос.
• Взнос завтра можно оплатить.

The basic meaning stays similar, but the emphasis changes:

• Взнос можно оплатить завтра.
  Neutral; tomorrow comes as the final piece of information.

• Завтра можно оплатить взнос.
  Emphasizes tomorrow more strongly.

Word order in Russian often reflects information structure and emphasis, not just grammar.

The stress is:

• взно́с
• мо́жно
• оплати́ть
• за́втра

A rough pronunciation guide:

• взнос ≈ vznohs
• можно ≈ MOZH-na
• оплатить ≈ uh-pla-TEET’
• завтра ≈ ZAF-tra / ZAV-tra depending on how closely you imitate connected speech

A learner often finds взн- difficult because of the consonant cluster at the start.

It is neutral and perfectly natural in many everyday administrative or service contexts.

You might see or hear it in places like:

• payment instructions
• websites
• office communication
• school or membership notices

It sounds standard and not especially emotional, casual, or literary.

Yes. Because Russian often uses impersonal structures where English may prefer a passive, several translations are possible:

• The fee can be paid tomorrow.
• It is possible to pay the fee tomorrow.
• You can pay the fee tomorrow.

All can match the Russian sentence, depending on context and style. The Russian original does not force one single English structure.