La transferència bancària arriba demà.

Because transferència is a feminine noun in Catalan, so the article and adjective must agree with it:

• la = feminine singular the
• transferència = transfer
• bancària = banking / bank-related, feminine singular

So the whole noun phrase has feminine singular agreement:

• la transferència bancària

If the noun were masculine, you would use el and a masculine adjective form.

It shows feminine singular adjective agreement.

The adjective comes from bancari / bancària:

• bancari = masculine singular
• bancària = feminine singular
• bancaris = masculine plural
• bancàries = feminine plural

Since transferència is feminine singular, the adjective must be bancària.

In Catalan, as in Spanish and many Romance languages, adjectives often come after the noun.

So:

• transferència bancària = bank transfer / banking transfer

This is the normal order here. Putting the adjective before the noun would sound unusual or change the style.

Catalan usually uses the definite article more often than English does.

So La transferència bancària arriba demà is the natural way to say:

• The bank transfer arrives tomorrow or, depending on context,
• The bank transfer will arrive tomorrow

Leaving out la would usually sound incomplete unless you were speaking in a very special context, like headings or notes.

Catalan often uses the present tense to talk about a future event when the time is clear from context.

Here:

• arriba = literally arrives
• demà = tomorrow

Because demà already shows that the event is in the future, arriba can naturally mean:

• arrives tomorrow
• is arriving tomorrow
• will arrive tomorrow

A true future form is also possible in Catalan:

• La transferència bancària arribarà demà.

That sounds slightly more explicitly future, but the present tense version is very common and natural.

Arriba is the third person singular present of arribar = to arrive.

It agrees with the subject la transferència bancària, which is singular.

So:

• jo arribo = I arrive
• tu arribes = you arrive
• ell/ella arriba = he/she/it arrives

In this sentence, the subject is a thing, so English uses it arrives.

Yes. Catalan uses arribar for things as well as people when something arrives, comes in, or is received.

So a transfer, package, letter, payment, or message can all arribar depending on context.

In this sentence, it means the bank transfer will come through / arrive / be received tomorrow.

Demà means tomorrow and functions as a time expression.

Putting it at the end is very natural:

• La transferència bancària arriba demà.

You could also move it for emphasis:

• Demà arriba la transferència bancària.

Both are grammatical, but the original word order is neutral and common.

The accent in transferència shows the stressed syllable and helps mark the correct pronunciation.

Catalan uses written accents more systematically than English. Here, the accent tells you the stress falls on the syllable containing è.

Likewise, bancària and demà also have accent marks for stress:

• transferència
• bancària
• demà

These accents are part of the correct spelling and should not be omitted in standard writing.

A rough guide is:

• La ≈ luh
• transferència ≈ trahnss-fuh-REN-see-uh
• bancària ≈ bahn-KAH-ree-uh
• arriba ≈ uh-REE-buh
• demà ≈ duh-MAH

A few useful points:

• rr in arriba is a rolled or trilled r
• the accented syllables are strong: -rèn-, -cà-, -mà
• final unstressed vowels are usually clearly pronounced

Pronunciation varies somewhat by dialect, but this will give you a good starting point.

Yes, if the context already makes it clear that you mean a bank transfer.

• La transferència arriba demà. = The transfer arrives tomorrow.

Adding bancària makes it more specific:

• La transferència bancària arriba demà.

So the adjective is helpful when you want to avoid ambiguity.

It can correspond to either in English, depending on context.

Catalan present tense often covers both ideas when a future time is stated:

• arrives tomorrow
• will arrive tomorrow

In natural English, many people would probably translate it as:

• The bank transfer will arrive tomorrow or
• The bank transfer should come through tomorrow

But grammatically, the Catalan form is present tense.

Yes, but the meaning or emphasis may shift slightly.

Neutral order:

• La transferència bancària arriba demà.

Other possible orders:

• Demà arriba la transferència bancària. → emphasizes tomorrow
• Arriba demà, la transferència bancària. → more marked, often spoken emphasis

For learners, the original sentence is the safest and most natural pattern to copy.