Chili's is Celebrating its Birthday Next Week with $3 Margaritas The Tex-Mex food chain is turning 43 next Tuesday, March 13, and will be selling its President Margaritas for $3.13. The margaritas, which are normally $7.80, come in multiple flavors, including strawberry and mango. If the fruity Presidente Margarita doesn't float your boat, Chili's also has a Jameson whiskey margarita available for the month of March. This is the first time Chili's has done a promotion for its birthday but here's hoping they make it a tradition.