Quoted film budgets are usually about half the actual budget as a rule of thumb, because they don't mention the half spent on marketing.

That's why films are often known as flops even when they make their "budgets" back. You're not in the money until you double the budget.

edit: Also, considering the vast majority of that marketing money is spent before the film comes out these days, and all the sales are made within a month - as much is spent on convincing people that a film that nobody has seen is going to be good as is spent on the film.