Croatia have a two-legged play-off against Iceland standing between themselves and a berth in Brazil next year.
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The first leg is in Reykjavik on Friday with the return match in Zagreb on Tuesday.
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The prize is to be divided among the players, the federation's spokesman Tomislav Pacak said.
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The former Yugoslav republic finished their qualifying campaign a distant second behind Belgium in Group.
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A after taking just one point from their last four games, leaving them in the play-offs.
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Their best result at a World Cup was third place in 1998 in France but they missed out on the last edition in South Africa.