Sin's Pay Day is a 1932 American pre-Code crime film directed by George B. Seitz and starring Lloyd Whitlock, Dorothy Revier and Mickey Rooney.

[2] It was later reissued under the alternative title Slums of New York with advertising material devoting greater attention to child actor Rooney, who had since emerged as a star at MGM.

Attorney Robert Webb makes a good living as a defense lawyer for gangsters.

After getting a notorious mob leader acquitted on a technicality, Webb develops a conscience and turns to alcohol letting his practice collapse.

When the boy is then killed by a bullet fired from a gangster's gun, Webb goes undercover to pose as a defense lawyer once more while secretly recording the incriminating conversation, which he turns over to the police.