Marc Wilkinson, 55, the owner of Pure Pizza in Morningside, said he had been planning a big altruistic act to help people struggling with the cost of living crisis.
He said it would also give his part-time staff more work.
"I'm very happy with my plan because it's a win, win, win for everyone," he said.
"The customers benefit, the suppliers benefit and my team of chefs benefit as it gives them more hours of work.
"I keep hearing about how the cost of living is affecting so many people and I just thought that my ovens are running all day anyway, so they may as well be working at full capacity all day if it helps people.
"Altruism is something that really interests me so I wanted to try it."