Topaz International, a corporate travel auditor, conducted a study this year in which it looked at 5,572 itineraries booked via corporate travel programs, of which 81 percent could be replicated, with the same routing, on public internet sites. Of those, only 6 percent could be booked online cheaper than with a travel agent. Small businesses generally make the switch from DIY to travel pro when they reach 25 to 50 employees and spend $50,000 to $100,000 annually on airfare, according to Anita Salvatore, executive vice president of global account services for Travizon. The Woburn, Mass., company turns out reports that help identify where a firm can leverage spending by, for example, negotiating with an airline for corporate rates. “If you’re planning on going public, you have to have these financial controls in place,” Salvatore says. Tim Hentschel, CEO of West Palm Beach, Fla.-based HotelPlanner, which specializes in group meetings, concurs. “Once your travel budget gets above $100,000 per year, it’s time to look at what you can do with a travel partner,” he says, noting that small businesses hitting that mark may be able to negotiate lower rates. Get the full story at Entrepreneur Read also "Travel agents report record use of GDS"