Расчётный период указан правильно.

Расчётный is an adjective meaning something like calculation-related, billing, or settlement depending on context. In расчётный период, it usually means billing period, accounting period, or calculation period.

It comes from the noun расчёт (calculation, settlement, payment) plus the adjective-forming suffix -н- and ending -ый.

So:

• расчёт = calculation / settlement
• расчётный = relating to calculation or settlement

In many real-life contexts, расчётный период is a fixed phrase.

Here период is the subject of the sentence, so it is in the nominative singular.

The structure is:

• Расчётный период = the billing/calculation period
• указан правильно = is indicated correctly

So the whole sentence means literally:

• The billing period is indicated correctly.

Because период is masculine singular nominative, the adjective расчётный also appears in masculine singular nominative to agree with it.

Указан is the short-form passive participle of the verb указать (to indicate, to specify, to point out).

So:

• указать = to indicate / specify
• указанный = indicated / specified (full form participle/adjective)
• указан = indicated / has been specified (short form)

In this sentence, указан works very much like the predicate in English is indicated or has been specified.

Russian often uses the short form of passive participles when they are part of the predicate.

Compare:

• Указанный период = the indicated/specified period
  Here указанный is a full form and describes the noun directly.

• Период указан = The period is indicated
  Here указан is the short form and acts as part of the statement about the subject.

So in Расчётный период указан правильно, the sentence is not saying the indicated billing period. It is saying the billing period is indicated correctly. That is why the short form указан is used.

In the present tense, Russian usually does not use a verb meaning to be in ordinary statements.

So English:

• The billing period is indicated correctly

becomes Russian:

• Расчётный период указан правильно.

This is completely normal. Russian often just puts the subject and predicate together without a present-tense is.

Because it modifies how something is indicated.

• правильный = correct (adjective)
• правильно = correctly (adverb)

Here the sentence means:

• the period is indicated correctly

So we need the adverb правильно, because it describes the action/result expressed by указан.

If you said правильный here, it would not fit the grammar of the sentence.

It is still nominative, because it is the subject, not an object.

In English, passive sentences can make this less obvious:

• The period is indicated correctly.

Russian works similarly here. The thing being talked about, расчётный период, is the grammatical subject of the sentence, so it stays in the nominative:

• расчётный период

That ending shows the short-form masculine singular of the passive participle.

The short-form endings are commonly:

• masculine: often zero ending or forms like -ан, -ен, etc.
• feminine: -а
• neuter: -о
• plural: -ы or -и

For указать, the short passive forms are:

• указан — masculine singular
• указана — feminine singular
• указано — neuter singular
• указаны — plural

Since период is masculine singular, we get указан.

Yes, Russian word order is flexible, and Правильно указан расчётный период is grammatically possible.

But the usual neutral version is:

• Расчётный период указан правильно.

This puts the topic first and sounds natural in many contexts, especially in interfaces, forms, or status messages.

Changing the order can shift emphasis:

• Правильно указан расчётный период.
  Emphasis on correctly
• Расчётный период правильно указан.
  Also possible, slightly different rhythm/emphasis

So the original sentence is a natural, neutral way to say it.

It can feel like either, depending on context.

Because указан comes from the perfective verb указать, it often suggests a completed result:

• has been indicated
• is specified
• is shown

In many practical contexts, especially UI or administrative language, English might translate it simply as:

• The billing period is indicated correctly.

But the Russian form often carries the idea that the correct indication/specification has already been done.

The standard spelling is расчётный, with ё, because it comes from расчёт.

However, in real texts, Russian often replaces ё with е, so you may also see:

• расчетный период указан правильно

This is very common in everyday writing, forms, websites, and official texts. Native speakers usually understand it immediately.

Still, for learners, it is useful to know that the correct pronunciation and dictionary form use ё:

• расчёт
• расчётный

A helpful pronunciation guide is:

• расчётный пери́од указан пра́вильно

Approximate pronunciation:

• rasch-YOT-nyy peh-REE-uht oo-kah-ZAHN PRAH-vil'-nah

Main stresses:

• расчЁтный
• перИод
• указАн
• прАвильно

A couple of useful notes:

• ё is always stressed
• правильно has stress on the first syllable: прА-

Yes. It sounds especially natural in formal, technical, administrative, or interface language.

For example, it could appear in:

• an online form
• tax software
• accounting software
• a utility bill or banking system
• a validation message

It has a slightly formal, impersonal tone, which is very common in Russian system messages and official wording.