You know (or should know) that the IRS changes the business milage rate each year (sometimes every six months) as well as the medical milage rate. But maybe you don’t know that the charitable milage rate never changes. I think it has been at 14 cents a mile since I was in high school (actually it has been the same since 1997). It is set by law and until Congress votes to change it, it will stay at 14 cents. Don’t hold your breath waiting for it to change.