Congratulations For, To or On?
Which preposition should be used with 'Congratulations', and what is the difference?

Thank You in advance!

Question

Congratulations For, To or On?
Which preposition should be used with 'Congratulations', and what is the difference?

Thank You in advance!

Answer

It depends on the context. Here are some examples from my experience:
Congratulations for/on + (-ing) 
e.g. "Congratulations for/on finishing your degree"
Congratulations to + (person)
e.g. "Congratulations to you for finishing your degree"
Congratulations on + (noun)
e.g. "Congratulations on your degree" 
Hope that helps!

Answer

Congratulations on the birth of your baby/ graduating with honors.

Congratulations for being selected for the program.

Please convey my congratulations to your dad for completing the marathon.

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