A bandeira tarifária não é cobrança indevida.

In Brazil, bandeira tarifária is a specific term used for the electricity tariff flag system. It indicates whether electricity is being billed under normal conditions or with an extra surcharge because generation costs are higher.

So this is not just any flag in a literal sense. Here, bandeira is part of an official billing term.

• bandeira = flag
• tarifária = related to rates or tariffs

Together, bandeira tarifária is best understood as a fixed expression, not translated word by word in everyday use.

A is the feminine singular definite article, meaning the.

It is used because bandeira is:

• singular
• feminine

So:

• a bandeira = the flag
• o bandeira would be wrong

In Portuguese, nouns usually need an article more often than in English, especially in formal statements like this one.

Because tarifária is an adjective describing bandeira, and adjectives in Portuguese usually agree with the noun in gender and number.

Since bandeira is:

• feminine
• singular

the adjective must also be:

• feminine
• singular

So:

• bandeira tarifária = correct
• bandeira tarifário = incorrect

This kind of agreement is very common in Portuguese.

In Portuguese, the normal way to make a sentence negative is to put não before the verb.

So:

• é = is
• não é = is not

This is the standard pattern:

• Ele é médico. = He is a doctor.
• Ele não é médico. = He is not a doctor.

So in your sentence:

• A bandeira tarifária não é... = The tariff flag is not...

É with an accent is the verb ser in the third person singular:

• é = is

Without the accent, e means:

• and

So these are two different words:

• é = is
• e = and

That accent is important because it changes both the pronunciation and the meaning.

Portuguese often leaves out the indefinite article in this kind of sentence, especially when the speaker is classifying or defining something.

So:

• não é cobrança indevida = is not improper billing / is not an undue charge
• não é uma cobrança indevida = is not an improper charge

Both can be possible, but they feel slightly different.

Without uma, the sentence sounds a bit more general, formal, or categorical.
With uma, it can sound a bit more like you are referring to an instance of improper charging.

In legal, administrative, or formal language, dropping the article is very common.

Cobrança can have a few related meanings depending on context, including:

• charge
• billing
• collection
• demand for payment

In this sentence, it most likely means something like:

• charge
• billing practice
• amount being charged

So cobrança indevida means something like:

• improper charge
• undue billing
• wrongful charge

It does not necessarily mean collection in the sense of debt collectors here.

Indevida means something like:

• improper
• undue
• unwarranted
• not justified

It often appears in formal, legal, consumer, or administrative language.

So cobrança indevida is a common expression meaning a charge that should not have been made, or that is considered improper.

It is not always exactly the same as illegal, although in some contexts it may overlap.
Indevida focuses more on the idea that something is not appropriate, not justified, or not rightfully due.

Because indevida is describing cobrança, and cobrança is a feminine singular noun.

So the adjective has to agree:

• cobrança = feminine singular
• indevida = feminine singular adjective

Compare:

• pagamento indevido = improper payment
• cobrança indevida = improper charge

The ending changes to match the noun.

Yes, very much so. Cobrança indevida is a very common expression in Brazil, especially in:

• consumer law
• banking
• utility bills
• customer service
• legal complaints

A Brazilian would immediately recognize it as a standard formal phrase meaning an improper or unjustified charge.

So this sentence sounds natural and realistic in administrative or legal contexts.

A rough pronunciation guide in Brazilian Portuguese would be:

ah ban-DAY-rah tah-ree-FAH-ryah nao eh koh-BRAN-sah in-jeh-VEE-dah

A few notes:

• A at the beginning sounds like ah
• bandeira sounds roughly like ban-DAY-ra, often with a light glide
• tarifária has stress on fá
• não is nasal, not a plain now
• é is like eh
• cobrança has stress on bran
• indevida has stress on vi

The exact pronunciation varies a little by region, but this is a good Brazil-focused approximation.

Yes, that is a reasonable close translation.

However, in natural English, depending on context, you might also say:

• The tariff flag does not constitute improper billing.
• The tariff flag is not an undue charge.
• The tariff flag is not an improper fee.

The best version depends on the context in which the sentence appears, especially whether it is legal, technical, or customer-facing language.

Yes, it sounds fairly formal and somewhat administrative or legal.

Clues include:

• bandeira tarifária as a technical term
• cobrança indevida as a formal set expression
• the overall structure with não é

In casual conversation, people might explain the same idea in a less formal way, but this sentence itself sounds like something you might see in:

• a notice from a utility company
• a legal explanation
• a customer service FAQ
• a regulatory document