on the house

Idioms  

1. At the expense of the establishment, as in This hotel serves an afternoon tea that's on the house. This idiom uses house in the sense of “an inn, tavern, or other building serving the public.” [Late 1800s]

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Example Sentences

Subramanyam, who sits on the House Oversight Committee, added that he was also "concerned" over the level of redactions that protect names of lawyers and people who are not victims.

From BBC

Rivas, who said she’s been working with Benjamin’s family throughout the ordeal, announced his release on the House floor.

From Los Angeles Times

“I’m glad that Benjamin is home and I hope he and his family can begin the healing process,” Rivas said on the House floor.

From Los Angeles Times

"How much did Santa's sleigh cost? Nothing, it was on the house."

From BBC

A vote on the House measure is expected in January, after the subsidies have already expired.

From Los Angeles Times