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Cost in Irish (Costas): Meaning, Pronunciation, Usage

‘costas’ also means: costs

The Irish for cost is costas, a masculine noun (plural costais).
Updated October 2026Report a mistake

How to say “cost” in Irish

Irish:
costas
English:
cost, costs
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“KOS-tus”  /ˈkɔst̪ˠəsˠ/
Various forms
Plural:
costais (costs)
Genitive singular:
costais, an chostais (e.g. méid an chostais, the amount of the cost)
Genitive plural:
costas, na gcostas (e.g. laghdú na gcostas, the reduction of costs)

What does “costas” mean?

“Costas” has two alternative meanings. The most common comes first.

cost
The amount of money needed to buy, do or make something.Also: expense, price, outlay.
1 other meaning: costs
2costs
In the plural, expenses incurred, especially legal costs awarded in a court case.Also: legal costs, expenses.

Other Irish words for cost: praghas (price)

“Costas” with the article

The plural of cost in Irish is costais. Here is costas after the article (an t-alt), in the singular and the plural.

an costas
the cost
No change after an
na costais
the costs
Plural: no change after na

“Costas” in a sentence: Irish examples

Common Irish sentences using costas, the Irish word for cost.

Beidh orainn costas na sochraide a íoc.
We will have to pay the funeral costs.
Cén costas atá ar an ticéad?
What does the ticket cost?
Thairg siad a chostais taistil a íoc.
They offered to pay his travel expenses.
Tá costais mhaireachtála ag ardú gach bliain.
Living costs are rising every year.
Rinneadh an obair gan mórán costais.
The work was done without much cost.
Bhí costas an lóistín níos airde ná mar a cheapamar.
The accommodation cost more than we thought.
Caithfimid gearradh siar ar ár gcuid costas.
We must cut down on our expenses.

Other nouns in Irish

More everyday Irish nouns to learn next.

Cost in Irish: frequently asked questions

What is the Irish for cost?

The Irish for cost is costas (pronounced “KOS-tus”). It’s a masculine noun and the plural is costais. Depending on context it can also mean costs.

How do you pronounce costas in Irish?

Costas is said like “KOS-tus” (IPA /ˈkɔst̪ˠəsˠ/).

What is the plural of cost in Irish?

The plural of costas is costais; with the article, na costais means “the costs”. The genitive plural is costas, as in laghdú na gcostas (the reduction of costs).

Does costas have more than one meaning?

Yes. Costas can mean cost or costs, depending on context; the first is the most common.

Why does costas change to chostas or gcostas?

Irish changes the start of some words after certain words. After mo (my) costas becomes mo chostas (lenition), and after ár (our) or i (in) it becomes ár gcostas (eclipsis).

What is the difference between 'costas' and 'praghas'?

'Praghas' is the price asked for something, while 'costas' is the cost or expense involved, e.g. 'costas maireachtála', cost of living.

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