Is "بابت" similar to the preposition "برای" ?
For example, can we say either of the following sentences?

ممنون بابت کمکتون
ممنون برای کمکتون

Question

Is "بابت" similar to the preposition "برای" ?
For example, can we say either of the following sentences?

ممنون بابت کمکتون 
ممنون برای کمکتون

Answer

you can use "بابت"  in official and polite way. and  "ّبرای"  is also ok. both of them are common.

Answer

yes

Answer

بله. تقریبا رسمی است. در موارد غیر رسمی «به خاطر» یا «برای» هم می تونه به کار برده بشه.

Answer

Yes. it has the same menaing.

Answer

Yes,
Casual talks : Mersi bara komaket 
مرسی برا کمکت