When could you get change back from your dollar at mcdonalds?

You could get change back from your dollar at McDonald's when you purchase an item that costs less than a dollar. Many McDonald's locations offer value items, like certain drinks or snacks, for 99 cents or less, allowing you to receive change. Additionally, any promotional item or limited-time offer priced under a dollar would also qualify for change back. However, prices can vary by location and over time, so it's best to check the current menu.