Less than you might think, if you're a business traveler, that is. According to hotel-online: Audit of Hotel Invoices Turns up Overcharges that May Add up to Millions for Business Travelers
May Add up to Millions for Business Travelers. Better warn attendees to check their bills:
If the rest of Corporate America is seeing the same amount of glitches, U.S. companies are giving hotels an extra $500 million a year, the study said.
They're not intentionally trying to rip people off, the article says. These are just mistakes. I believe that, and yet it's a peculiar coincidence that the average error winded up being in the hotel's favor...