Hraðbankinn sýnir að inneignin mín er lægri eftir stóra úttekt í gær.

Because Icelandic usually puts the definite article on the end of the noun.

• hraðbanki = an ATM
• hraðbankinn = the ATM

Here, hraðbankinn is the subject of the sentence, so it appears in the nominative singular.

Sýnir is the 3rd-person singular present tense of sýna, meaning to show.

So:

• ég sýni = I show
• þú sýnir = you show
• hann/hún/það sýnir = he/she/it shows

Since hraðbankinn is singular, Icelandic uses the singular verb form: hraðbankinn sýnir.

Að here means that and introduces a subordinate clause.

So:

• Hraðbankinn sýnir = the ATM shows
• að inneignin mín er lægri ... = that my balance is lower ...

English sometimes leaves out that, but Icelandic usually keeps að in this kind of sentence.

In Icelandic, a possessive often comes after the noun when the noun is definite.

So:

• inneignin mín = my balance
• literally: the balance my

This is very normal Icelandic word order. English speakers often expect the possessive first, but Icelandic frequently prefers noun + possessive in expressions like this.

Because the sentence is referring to a specific balance: the speaker’s own balance.

Icelandic commonly uses the definite form in combinations like:

• bókin mín = my book
• bíllinn minn = my car
• inneignin mín = my balance

So the definite article is not unusual here at all.

Inneign means something like credit, funds on account, or balance available.

In this sentence, it is best understood as the speaker’s account balance or available funds. It is a common banking word, even though it does not match English balance perfectly in every context.

Lægri means lower. It is the comparative form of lágur.

So:

• lágur = low
• lægri = lower

The sentence says the balance is lower, not just low. That is why the comparative form is used.

Because the preposition eftir requires the accusative here, and úttekt is feminine singular.

That means the adjective and noun must both appear in the correct form:

• nominative: stór úttekt
• accusative: stóra úttekt

So eftir stóra úttekt means after a large withdrawal.

Here, úttekt means a withdrawal, especially a bank withdrawal or cash withdrawal.

So:

• stór úttekt = a large withdrawal

The word can mean other things in other contexts, but in a banking sentence like this, withdrawal is the natural meaning.

The most natural reading is that í gær refers to the withdrawal.

So the sentence is understood as:

• there was a large withdrawal yesterday
• and now the ATM shows that the balance is lower after that withdrawal

In other words, í gær most naturally goes with stóra úttekt.

Because í gær is simply the normal Icelandic expression for yesterday. It is best learned as a fixed phrase.

Even though í often means in, you should not translate it word-for-word here. Just treat í gær as the standard expression meaning yesterday.

Because after að, Icelandic uses subordinate-clause word order.

So the clause stays in the normal pattern:

• inneignin mín = subject
• er = verb
• lægri = complement

English speakers sometimes look for a different order, but this is the normal Icelandic structure after að.