How long will I be out of work after surgery for an anal fistula?

Really depends. Erika - there are several surgeries for anal fistula. Your recovery really depends on not only what exact procedure you have, but also your tolerance for pain, and how important it is for you to be back at work. I've seen a range from the same afternoon to three to four weeks.
Varies. Time off of work is variable depending on the method of fistula surgery used, the individual patient and the type of work you do, it can be anywhere from 2-3 day up to 10-14 days and is often case specific.