I was recently wondering if I am saying the bracha on my tallit katan at the right time (I'm not married and don't wear a tallit gadol). When should the bracha on the tallit katan be said? Before it is put on? After you are fully dressed? At the beginning of davening?
The blessing is said immediately before putting on the Talit Katan. Code of Jewish Law Siman 9:8:
In a case where one puts it on when he can't recite the blessing (at night, or his hands are unclean), he says the blessing when he can. Code of Jewish Law Siman 9:9:
Also one should put on the Talit Katan and say the blessing only when he's not naked. Code of Jewish Law Siman 5:17: