Se sbaglio il PIN tre volte, la banca blocca la carta fino a domani.

In Italian, after se for a real, possible condition, the present tense is very often used, just like in everyday English sentences such as If I make a mistake, ...

So:

• Se sbaglio il PIN tre volte, ... = If I enter the PIN wrong three times, ...

Italian usually does not use the future tense after se in this kind of sentence.
So se sbaglierò would sound wrong here.

A very common pattern is:

• Se + present, present
• Se + present, future

For example:

• Se piove, resto a casa.
• Se piove, resterò a casa.

In your sentence, both parts are in the present because it expresses a general rule.

Sbaglio comes from sbagliare, which means to make a mistake, to get something wrong, or to enter something incorrectly, depending on context.

Here, sbaglio il PIN means something like:

• I get the PIN wrong
• I enter the wrong PIN
• I make a mistake with the PIN

It does not mean that the PIN itself is wrong in general. It means I am the one making the mistake.

Italian usually uses articles more often than English does.

So even with abbreviations or technical words, Italian often says:

• il PIN
• la password
• il telefono
• la carta

In English, we often say just PIN, but in Italian il PIN sounds natural because the noun is treated like a normal masculine singular noun.

Because Italian usually drops subject pronouns when they are not needed.

The ending of the verb already tells you the subject:

• sbaglio = I make a mistake / I get wrong
• sbagli = you get wrong
• sbaglia = he/she gets wrong

So io is unnecessary unless you want emphasis or contrast.

Compare:

• Se sbaglio il PIN... = neutral, normal
• Se io sbaglio il PIN... = more emphatic, like if I’m the one who gets it wrong...

Tre volte is the normal way to say three times in Italian.

So:

• una volta = once
• due volte = twice / two times
• tre volte = three times

You do not need per here.

• Sbaglio il PIN tre volte = I enter the PIN wrong three times

Using per tre volte would sound unnatural in this sentence.

Because the sentence describes a general consequence or rule.

• Se sbaglio il PIN tre volte, la banca blocca la carta.

This is like saying:

• If you heat water to 100°C, it boils.
• If I press this button, the machine stops.

Italian often uses the present tense for rules, instructions, and predictable results.

So blocca here means blocks in a general sense: that is what happens.

Italian often prefers a direct, active structure when it is clear and simple.

So:

• la banca blocca la carta = the bank blocks the card

This is straightforward and natural.

A passive version is possible:

• la carta viene bloccata dalla banca

But it is heavier and less direct. In everyday language, the active version is usually preferred unless there is a specific reason to focus on the card rather than the bank.

Again, Italian uses articles very regularly.

• la banca = the bank
• la carta = the card

Even when English might say something more general like the bank or just your card depending on context, Italian often keeps the definite article.

In this sentence:

• la banca means the bank involved in the situation
• la carta means the card being used

This sounds completely natural in Italian.

Yes. Carta literally means card, but in context it commonly refers to a payment or bank card.

Depending on context, Italian can say:

• carta di credito = credit card
• carta di debito = debit card
• carta bancomat = ATM/debit card in everyday usage

Here, just la carta is enough because the context with PIN and bank makes it clear.

Fino a domani means until tomorrow.

• fino a = until / up to
• domani = tomorrow

So the idea is that the card remains blocked up to tomorrow.

Other examples:

• Aspetto fino a domani. = I’ll wait until tomorrow.
• Il negozio è chiuso fino a lunedì. = The shop is closed until Monday.

Yes. Fino a domani gives the general endpoint until tomorrow, but it does not by itself specify the exact time.

Depending on context, it could mean:

• until some point tomorrow
• until tomorrow morning
• until the next day, according to the bank’s system or policy

If someone wanted to be more precise, they could say:

• fino a domani mattina = until tomorrow morning
• fino alle 9 di domani = until 9 tomorrow
• fino a domani sera = until tomorrow evening

So the phrase itself is clear, but not ultra-specific.

Yes, that is also correct.

You can put the se-clause first or second:

• Se sbaglio il PIN tre volte, la banca blocca la carta.
• La banca blocca la carta se sbaglio il PIN tre volte.

Both mean the same thing.

When the se-clause comes first, Italian normally uses a comma.
When it comes second, a comma is usually not needed.

Starting with Se sbaglio... puts a little more focus on the condition.

It is most naturally understood as a general rule.

That is because of the structure:

• se + present
• present

This often describes something that normally happens whenever the condition is met.

So the sentence is not mainly saying I know for sure this will happen to me tomorrow.
It is saying something like:

• Whenever/if I enter the PIN wrong three times, the bank blocks the card until tomorrow.

Yes, you could, but the tone changes slightly.

For example:

• Se inserisco male il PIN tre volte... = If I enter the PIN incorrectly three times...
• Se digito il PIN sbagliato tre volte... = If I type the wrong PIN three times...

These are all possible, but sbaglio il PIN is concise and natural in everyday Italian.

It is a very common Italian habit to use sbagliare directly with the thing you get wrong:

• sbagliare numero = dial the wrong number
• sbagliare indirizzo = get the address wrong
• sbagliare PIN = enter the wrong PIN

So this construction is worth learning.