It's "Congratulations ON" — Never "FOR"!

[00:00:00]You just won $456,000.

[00:00:03][screaming] Congratulations on winning.

[00:00:07]>> Congratulations on winning. Here's the pattern. The word congratulations, then the preposition on, then a verb ending in ing, like congratulations on getting the job. And remember, we always use on and never for.