As of June 5, 2022, twenty-nine states currently charge sales tax on diapers. This diaper tax can be as low as 4% or as high as 7% in Mississippi and Tennessee. In many states, cities and counties can add additional tax. Children require at least 50 diaper changes per week or 200 diaper changes per month. By reducing the sales tax, families can buy 2 additional diapers for every percentage point reduction in the sales tax for the same money they would have used to buy 200 diapers with tax.