Mesmo que a despesa fixa aumente, pago a prestação.

Mesmo que means even if or even though, depending on context. In this sentence, it introduces a concession: something may happen, but the result in the main clause still remains true.

So:

• Mesmo que a despesa fixa aumente = Even if the fixed expense increases
• pago a prestação = I pay the instalment

A very common pattern is:

• mesmo que + subjunctive

It is used when the speaker is saying that the main action still happens regardless of that condition.

Because mesmo que normally requires the subjunctive.

• aumenta = present indicative
• aumente = present subjunctive

Portuguese uses the subjunctive after expressions like mesmo que because the increase is presented as a possibility, condition, or hypothetical situation, not simply as a stated fact.

Compare:

• Se a despesa fixa aumenta, pago a prestação.
  This sounds more like a general factual pattern.
• Mesmo que a despesa fixa aumente, pago a prestação.
  This means even if it increases, I still pay.

So the subjunctive is triggered by the concessive expression mesmo que.

Pago is the 1st person singular present indicative of pagar: I pay.

It is in the indicative because this is the main statement the speaker is asserting as real or true. The sentence means something like:

• Even if that happens, I do pay / I still pay the instalment.

In Portuguese, the main clause here stays in the indicative, while the clause introduced by mesmo que takes the subjunctive.

Yes. Portuguese often omits subject pronouns when the verb ending already makes the subject clear.

• pago already tells you the subject is eu = I

So:

• Pago a prestação = I pay the instalment
• Eu pago a prestação = also correct, but more explicit or emphatic

If you include eu, it can sound more contrastive:

• Mesmo que a despesa fixa aumente, eu pago a prestação.
  = Even if the fixed expense increases, I’m the one who pays / I still pay it.

Despesa fixa means fixed expense or fixed cost.

• despesa = expense, expenditure
• fixa = fixed

It usually refers to a regular expense that does not vary much from month to month, such as rent, insurance, a loan payment, or a subscription.

In everyday financial language, a Portuguese speaker would understand despesa fixa as one of your regular recurring costs.

Here, prestação most likely means an instalment payment.

In European Portuguese, prestação is very commonly used for:

• a loan instalment
• a mortgage payment
• a payment for something bought in instalments

So pago a prestação often suggests:

• I pay the monthly instalment
• I keep up with the payment

Depending on context, prestação can also have other meanings, but in financial sentences like this one, instalment/payment due is the most likely meaning.

Because both nouns are being treated as specific or identifiable items.

• a despesa fixa = the fixed expense
• a prestação = the instalment

Portuguese uses definite articles more often than English does. In many contexts where English might say something more general, Portuguese still naturally uses o / a / os / as.

So even if English translation might sometimes sound smoother without the, Portuguese often keeps the article.

Sometimes learners try that because of English even if, but in standard Portuguese, mesmo que is the normal and safest choice here.

• Mesmo que a despesa fixa aumente... = natural
• Mesmo se... = much less standard in this kind of sentence

For a learner, it is best to remember:

• even if → mesmo que

That is the standard structure you should actively use.

Yes. Portuguese allows some flexibility.

For example:

• Mesmo que a despesa fixa aumente, pago a prestação.
• Pago a prestação, mesmo que a despesa fixa aumente.

Both are correct.

The version with mesmo que first puts more emphasis on the obstacle or condition. The version with pago a prestação first puts more emphasis on the action the speaker takes.

The meaning stays essentially the same.

Yes. A close alternative is ainda que, which also means even if / although in many contexts.

• Ainda que a despesa fixa aumente, pago a prestação.

This is grammatical and fairly formal or careful in tone.

Another possible structure is embora:

• Embora a despesa fixa aumente, pago a prestação.

But embora is often closer to although, and the nuance can feel slightly different. For a direct equivalent of even if, mesmo que is usually the best match.

It can suggest a general commitment, a present attitude, or even a future possibility, depending on context.

That is very common in Portuguese. The present tense often covers ideas that English may express in several ways:

• I pay the instalment
• I still pay the instalment
• I’ll pay the instalment anyway
• I keep paying the instalment

So the sentence does not have to be strictly about right now. It can mean that, regardless of a possible increase, the speaker intends or manages to continue making the payment.

It can be understood in Brazil, but usage may differ.

In European Portuguese, prestação is very common for an instalment payment. In Brazilian Portuguese, people may also use prestação, but parcela is extremely common in everyday speech for an instalment.

So:

• European Portuguese: pagar a prestação
• Brazilian Portuguese: often pagar a parcela

Since your sentence is in Portuguese from Portugal, prestação sounds perfectly natural.

In European Portuguese, several unstressed vowels are reduced, so the sentence may sound less fully pronounced than an English speaker expects.

Roughly:

• Mesmo que → something like MEZH-mu k(ə)
• despesa fixa → d(ə)sh-PE-zuh FEEK-suh
• aumente → ow-MEN-t(ə)
• pago a prestação → PA-gu uh pres-tu-SOUNG

A few important points:

• s in mesmo sounds like z
• unstressed e often becomes a very weak sound, almost like uh or disappears
• ão in prestação is nasal

If you are learning European Portuguese pronunciation, reduced vowels are one of the biggest differences from Brazilian Portuguese.

A very useful pattern is:

• Mesmo que + present subjunctive, + present indicative

Example from your sentence:

• Mesmo que a despesa fixa aumente, pago a prestação.

You can build many similar sentences with it:

• Mesmo que chova, vou sair.
  Even if it rains, I’m going out.
• Mesmo que seja difícil, tento.
  Even if it’s difficult, I try.
• Mesmo que ele não venha, começamos.
  Even if he doesn’t come, we start.

So the key lesson is:

• mesmo que introduces the hypothetical/concessive idea
• the verb after it goes in the subjunctive