I don't remember exactly how long it takes -- but I wasn't irked by the wait. I am pretty sure it was 2-4 weeks. The info they send after their analysis is quite thorough -- with specific recommendations for whatever you are trying to plant in the soil you sampled. It's definitely worth the wait! Not that I have yet acted on it... But I was truly astonished to learn that my soil is rather alkaline -- which explains why my blueberries have been unhappy.
Good luck!