Расхождение означает ошибку в начислении.

Because расхождение is in the nominative singular and it is the thing that performs the action of the verb означает.

So the structure is:

расхождение → subject
означает → verb
ошибку → direct object
в начислении → prepositional phrase modifying ошибку

In very literal terms, the sentence is built like:

A discrepancy indicates an error in the calculation/accrual.

Because the subject расхождение is singular.

• расхождение = one discrepancy
• расхождения = discrepancies

So:

• Расхождение означает... = A discrepancy means/indicates...
• Расхождения означают... = Discrepancies mean/indicate...

Note that in the present tense, Russian verbs show person and number, but not gender. So означает is singular because the subject is singular, not because it is neuter.

Because ошибку is the direct object of означает.

The verb означать normally takes what it means or indicates in the accusative:

• означать ошибку
• означать проблему
• означать риск

The dictionary form is ошибка, but in the accusative singular it becomes ошибку.

So:

• nominative: ошибка
• accusative: ошибку

Because after в meaning in / within / in the area of, Russian uses the prepositional case.

The noun is начисление. In the prepositional singular, it becomes начислении.

So:

• dictionary form: начисление
• after в in this meaning: в начислении

Here в начислении does not mean physical location. It means something like in the calculation / in the billing / in the accrual as an abstract area or process.

It specifies where the error is or what kind of error it is.

So ошибку в начислении means:

• an error in the calculation
• an error in the accrual
• an error in the billing/charge

The exact English wording depends on context, especially in finance, payroll, utilities, or accounting.

Grammatically, в начислении modifies ошибку, not the verb означает.

They are similar, but not always identical in tone.

• означает is a bit more formal, precise, and neutral
• значит is often more common in speech

In a technical or official sentence like this, означает sounds very natural.

For example:

• Это означает ошибку в начислении. = This indicates an error in the billing/calculation.
• Это значит, что в начислении есть ошибка. = This means that there is an error in the billing/calculation.

Also, значит often has other uses in conversation, such as so or that means, while означает is more strictly lexical.

Yes. A very natural alternative is:

Расхождение означает, что в начислении есть ошибка.

This version may feel clearer to English speakers because it spells out the idea as a full clause:

The discrepancy means that there is an error in the calculation/accrual.

The original sentence is more compact:

Расхождение означает ошибку в начислении.

Both are grammatical. The original sounds a little more concise and formal.

Not quite, because the meaning changes.

• Расхождение означает ошибку в начислении = The discrepancy indicates an error in the calculation/accrual.
• Расхождение — это ошибка в начислении = The discrepancy is an error in the calculation/accrual.

The original sentence is about evidence or indication.
The version with это makes the two things more directly equivalent.

So if you want to keep the idea of signaling or pointing to an error, означает is better.

Yes, it is fairly formal and very common in technical, administrative, financial, and official contexts.

It is often used for:

• discrepancies in numbers
• mismatches in records
• differences between expected and actual values
• inconsistencies in data

In everyday casual speech, people might sometimes choose other words depending on context, such as:

• разница = difference
• несовпадение = mismatch / non-coincidence

But расхождение is very natural when talking about reports, bills, payroll, accounting, or system data.

Because Russian has no articles.

English needs to choose between:

• a discrepancy
• the discrepancy
• an error
• the error

Russian does not mark that directly with articles. The context tells you whether the meaning is definite or indefinite.

So Расхождение означает ошибку в начислении could be understood in English as:

• A discrepancy indicates an error in the calculation
• The discrepancy indicates an error in the calculation

depending on context.

The standard stresses are:

• расхождЕние
• означАет
• ошИбку
• в начислЕнии

So the whole sentence is pronounced approximately as:

расхождЕние означАет ошИбку в начислЕнии

For learners, the two most useful ones to remember are probably расхождЕние and начислЕние / начислЕнии, since those are less predictable.

It is a neuter noun ending in -ие.

Its dictionary form is расхождение. Nouns of this type are very often abstract nouns, and many are related to verbs.

Here it comes historically from the idea of diverging / not matching.

Because it is neuter and singular, its past-tense agreement would show neuter:

• Расхождение означало проблему.

But in the present tense, as in your sentence, Russian only shows singular vs. plural on the verb:

• Расхождение означает
• Расхождения означают