DIXON – Mumford & Sons management will have to pony up ahead of time and pay in full for the Aug. 18 concert, Dixon police officials said Monday.

The Dixon Police Department is calculating how much extra overtime it and other departments it will bring in will incur because of the concert, which is expected to practically double the population of the town overnight, Police Chief Danny Langloss said.

“We have to have total compensation [up front] to get the necessary police officers to provide for the security,” he said. “We’re just not financially in a position to do it any other way.”