Ég þarf reiðufé, svo ég fer í hraðbankann eftir vinnu.

Þurfa is the infinitive, meaning to need. After ég (I), Icelandic uses the 1st person singular present form þarf.

So:

• að þurfa = to need
• ég þarf = I need
• þú þarft = you need
• hann/hún/það þarf = he/she/it needs

This is just normal verb conjugation.

Reiðufé means cash or ready money. It usually refers to physical money, especially in contrast with paying by card or electronically.

It is a fairly standard, natural word, and it is often treated like a mass noun, much like English cash.

Because the sentence means cash in general, not some specific cash already mentioned.

That is very similar to English:

• I need cash = general
• I need the cash = specific cash

In Icelandic, reiðufé here is being used in that general sense, so no definite article is needed.

Here svo means so, linking the first clause to the result in the second clause:

• Ég þarf reiðufé = I need cash
• svo ég fer í hraðbankann = so I’m going to the ATM

Depending on context, svo can also mean things like then or and then, but in this sentence it is clearly the so/result meaning.

Because Icelandic often uses the present tense for a planned or near-future action, just like English does.

Compare English:

• I’m going to the ATM after work

That is present in form, but future in meaning. Icelandic does the same:

• ég fer = literally I go, but often naturally understood as I’m going / I’ll go

So this is normal and idiomatic.

Hraðbanki means ATM or cash machine. In the sentence, it appears as hraðbankann, which is the definite singular accusative form: the ATM.

The important point is that Icelandic uses í with the accusative when there is motion toward a place:

• fer í hraðbankann = go to the ATM

So even though English says to the ATM, Icelandic naturally says í hraðbankann.

Not in the strange literal English sense of climbing inside the machine.

In Icelandic, í is often used where English would use to for movement toward a place. So:

• í hraðbankann = to the ATM

This is just normal Icelandic usage. The case helps show the idea of movement.

In this sentence, svo is acting as a conjunction joining two clauses, so the second clause keeps normal main-clause order:

• ég fer = subject + verb

So:

• Ég þarf reiðufé, svo ég fer í hraðbankann...

If a different kind of sentence opener were placed first inside the clause, Icelandic often would put the verb second. But here, with svo connecting the clauses, svo ég fer is the natural pattern.

Eftir vinnu is the usual way to say after work in a general, routine sense.

It works a lot like English:

• after work = general part of your daily schedule

Using vinnuna would make it sound more specific, like after the work or after that particular work period/task. In everyday speech, eftir vinnu is very common and natural.

Yes. That is also very natural Icelandic.

The difference is roughly:

• Ég þarf reiðufé = I need cash
• Mig vantar reiðufé = I’m lacking cash / I need cash

Both can work in everyday speech. The main thing learners notice is the grammar:

• ég þarf
• mig vantar

So with vanta, Icelandic uses mig rather than ég.

A useful basic rule is:

• þ sounds like the th in thin
• ð sounds like the th in this

So in this sentence:

• þarf begins with the thin sound
• hraðbankann contains the this sound

These are separate letters in Icelandic, and English speakers usually want to learn them early because they appear all the time.