You Can't Buy Luck is a 1937 American murder mystery film directed by Lew Landers and starring Onslow Stevens, Helen Mack and Vinton Hayworth.

Superstitious New York gambler Joe Baldwin (Onslow Stevens), owner of the thoroughbred racing horse Sarcasm, believes that luck can be bought with charitable deeds.

He also gives his old friend Frank Brent cash to save his cab business and visits an orphanage in Louisville with his sister, where he meets Betty McKay (Helen Mack), a pretty teacher who scoffs at his philosophy.

She scolds him for wishing for rain on the day of the Derby to aid his horse, who runs best on a muddy track, because the orphans plan an outdoor party.

In an attempt to repair the damage before the Preakness, Joe throws the orphans a lavish party, hiring clowns and other entertainment.