Leigan er áttatíu þúsund krónur á mánuði.

Leiga is the indefinite form, while leigan is the definite form, meaning the rent.

In Icelandic, the definite article is usually added to the end of the noun instead of being a separate word like English the.

• leiga = rent
• leigan = the rent

Also, leiga is a feminine noun.

Here, leigan refers to the rent amount you pay, not the act of renting in general.

Depending on context, leiga can relate to:

• rent as a payment
• a rental
• a lease/rental arrangement

In this sentence, because it is followed by a price and á mánuði, it clearly means the monthly rent.

Er is the present tense of að vera, the verb to be.

So:

• ég er = I am
• þú ert = you are
• hann/hún/það er = he/she/it is

Here, Leigan er ... simply means The rent is ...

Áttatíu þúsund means eighty thousand.

It is built very much like English:

• áttatíu = eighty
• þúsund = thousand

So:

• áttatíu þúsund krónur = eighty thousand krónur

In everyday Icelandic, þúsund behaves like a number word here and stays the same in this kind of phrase.

Because the amount is plural: 80,000 crowns, not 1 crown.

• króna = one krona
• krónur = kronur, crowns

So:

• ein króna
• tvær krónur
• áttatíu þúsund krónur

The noun after the number is plural because the amount is more than one.

Because Icelandic does not need one here.

English sometimes uses structures like thousands of dollars, but with exact amounts both English and Icelandic usually go straight from the number to the noun:

• eighty thousand dollars
• áttatíu þúsund krónur

So þúsund krónur is the normal pattern.

Here, á mánuði means per month.

This is a very common Icelandic way to express a rate or repeated time unit:

• price per month
• salary per month
• cost per year, etc.

So even though á often means on, you should not translate it too literally here. In this sentence, the whole phrase functions like per month.

Because mánuði is a case form of mánuður.

The basic forms are:

• mánuður = month
• mánuð = month, accusative singular
• mánuði = month, dative singular

In the fixed expression á mánuði, Icelandic uses this dative form. This is a good example of something learners often just memorize as a phrase:

• á mánuði = per month

Yes. This is a very normal, neutral Icelandic sentence pattern:

• Leigan = subject
• er = verb
• áttatíu þúsund krónur = complement
• á mánuði = rate/time phrase

So the structure is basically:

subject + verb + amount + rate phrase

You can move parts around for emphasis, but this version is the most straightforward.

A very rough English-style approximation is:

LAY-ghan er OW-tah-tee-u THOO-sund KROH-nur ow MOW-nu-thi

A few helpful points:

• ei in Leigan sounds roughly like ay
• á sounds roughly like ow in cow
• þ sounds like th in thing
• ð sounds like th in this
• stress usually falls on the first syllable in Icelandic words

This is only an approximation, but it is a useful starting point.

Yes. You can write:

Leigan er 80.000 krónur á mánuði.

You may also see:

• 80 000
• sometimes other formatting styles depending on context

A useful thing to remember is that Icelandic often uses a comma for decimals, so number punctuation may look different from English conventions.

In casual conversation, sometimes yes, if everyone already knows you are talking about Icelandic currency.

For example, someone might say just:

• Leigan er áttatíu þúsund á mánuði.

But the full, clear version is:

• Leigan er áttatíu þúsund krónur á mánuði.

For learners, it is better to keep krónur in the sentence until the pattern feels natural.

Yes. The pattern is very useful.

For example:

• á viku = per week
• á mánuði = per month
• á ári = per year

So once you know this structure, you can reuse it with other time expressions. Just remember that the noun after á may change form depending on its case.