$40 a Day was a Food Network show hosted by Rachael Ray. In each episode, Ray takes a one-day trip to an American, Canadian, or European city with only $40 US, to spend on food. While touring the city, she finds restaurants to go to (often based on local recommendations), and usually manages to fit three meals and some sort of snack or after-dinner drink into her small budget.

The show premiered on April 1, 2002, five months after the debut of 30 Minute Meals, making it her second show on the Food Network. Some clips are sometimes used in Ray's later series, Rachael Ray's Tasty Travels. Another Food Network series, Giada's Weekend Getaways starring Giada De Laurentiis, is similar in format, as noted by Anthony Bourdain. In 2010, The Travel Channel began airing reruns of the show. As of 2013, the show is no longer in reruns on the Travel Channel.