As horas extras estão no contracheque.

As is the feminine plural definite article, meaning the.

It has to match horas, which is a feminine plural noun:

• a hora = the hour
• as horas = the hours

So as horas extras means the overtime hours or the overtime in this context.

Portuguese often expresses overtime as overtime hours, so it commonly uses the plural form horas extras.

That is different from English, where overtime is often treated as an uncountable noun. In Portuguese, the idea is more concrete and countable:

• 1 hora extra = 1 overtime hour
• 2 horas extras = 2 overtime hours

So even if the English translation uses singular overtime, the Portuguese phrase is often plural.

Because extra is agreeing with horas in number.

In this expression:

• hora extra = singular
• horas extras = plural

So when the noun becomes plural, extra also becomes plural in standard usage here.

In Portuguese, adjectives often come after the noun, and extra does here too.

So the normal order is:

• hora extra
• horas extras

English often puts modifiers before the noun, but Portuguese very often places them after.

Because the subject is plural: as horas extras.

The verb estar must agree with the subject:

• a hora extra está
• as horas extras estão

So estão is the correct plural form.

Because estar is used here to show location or presence: the overtime is on/in the pay stub.

Portuguese commonly uses estar when something appears in a place, including a document:

• Os dados estão no sistema
• O nome está na lista
• As horas extras estão no contracheque

Using ser here would sound wrong, because this is not about identity or definition.

No is a contraction of:

• em + o = no

So no contracheque literally means in the contracheque.

In English, you would often say on the pay stub or on the payslip, but Portuguese commonly uses em for this kind of document context.

Because contracheque is a masculine noun in Portuguese:

• o contracheque
• no contracheque
• do contracheque

So the masculine article o is what contracts with em to form no.

In Brazil, contracheque usually means pay stub, payslip, or salary statement.

It does not usually mean the salary itself. It refers to the document that shows things like:

• salary
• deductions
• taxes
• bonuses
• overtime

Depending on the region or company, you may also hear holerite or demonstrativo de pagamento.

You can, but it sounds less natural in an ordinary sentence.

As horas extras estão no contracheque sounds more complete and natural when talking about specific overtime that both speakers understand.

Without the article, horas extras can sound more general, more like a headline, or slightly more telegraphic.

The usual, neutral order is:

As horas extras estão no contracheque.

But Portuguese word order can change for emphasis. For example:

No contracheque estão as horas extras.

That version is grammatical, but it sounds more marked or emphatic. The original sentence is the most natural everyday order.

Yes, but the structure changes.

• As horas extras estão no contracheque = The overtime is on the pay stub
• O contracheque tem horas extras = The pay stub has overtime

Both can be natural, but they focus on different things:

• estão focuses on where the overtime appears
• tem focuses on what the pay stub contains

A rough English-style approximation is:

az OR-as EKS-tras es-TOW noo kon-tra-SHE-kee

A few notes:

• as often sounds like az before a voiced sound
• estão has a nasal ending
• contracheque is commonly pronounced with cheque sounding roughly like SHE-kee

The natural stress is mainly on:

• hoRAs
• EXtras
• esTÃO
• contraCHEque