If you don't pay your taxes in the U.S, depending on severity, you either get fined, jail time,  or they can put a lien on all of your assets including your house, car, etc. Not to mention, just about anything can drop from your credit report after like 7 years, or whatever the amount of time is. Bankruptcy, missed bills, late payments. But IRS issues stay on for life. So I suppose that means no more loans, or if you can find them, they are the high interest ones you see on sleazy T.V commercials.