Overall, Americans plan to spend about $8.4 billion on Halloween, up from $6.9 billion last year, with those buying costumes expecting to spend about $46 on average, according to the retail federation's survey. Spirit will be opening more than 1,200 seasonal stores in the U.S. and Canada, up from 1,165 last year, Lombardo said. Chicago Costume also has three pop-up stores — fewer than in some years, as it's hard to find good locations at affordable rents, Hickey said.