Region: General | Usage example: The repair costs an arm and a leg, so we are getting a second opinion.

Costs an arm and a leg

Meaning

Very expensive.

Used to describe high prices or fees.

Origin notes can vary by region and source; this page gives the commonly reported explanation and usage context.

Possibly refers to the value of limbs in portrait painting commissions.

Became common in American speech during the mid-20th century.