The length of TABC certification varies from one website to another. There are tons of accredited websites by TABC where you can get the certification. Usually, an online course would last from 3 to 6 hours depending on the website and how fast you are in reading the course material and taking the exam. On the other hand, if you take the certification through a certification class where you will listen to an instructor, this class normally takes about 4 hours. This is like a classroom-setting discussion where you will be with other business owners who are wishing to get the certification. But if you get the certification through an onsite certification, this will also last for about 4 hours because there will also be an instructor that will hold the class. The examination will also be given during that time. And if you pass, you will also get the certification right then and there.