Prohibited transactions are a list of things that you cannot do with your retirement account. In fact, they are one of the worst things you can do with a retirement account. When a prohibited transaction occurs, your entire IRA is deemed distributed as of January 1 of the year you made the prohibited transaction. This can lead to any number of negative consequences, the least of which include massive taxation and penalties. Since the prohibited transaction rules are so important, the basic information can be readily found in IRS publications and other places on the web, but here are 3 things most people don’t know about them.