I look at what the minimum I would make in an hour of teaching, sometimes add in drive time too- my private lessons are pretty pricey, but some folks have opted for a small group lesson to split the cost. basically, I don't have time to do private lessons unless you really make it worth my while. & I don't think my prices are too terribly high since we are paying $25 per half hour violin lessons for my son...& we have to go to the teacher's place. Also, if you are renting a studio, consider billing the studio rental fees separately/in addition to your lesson fees so they know where the $ is going.

my prices are here:
www.alaskaawalim.com
on the 'classes' page

I charge the same amount for private sessions whether it's one or four. I've been thinking about changing this, but up to now it's worked well. And yes definitely add in travel costs if you are going to them. Above four, I would work out of per person rate. At that point, you're basically teaching a full class.

When you go to their house, you are in their territory, so lay down the rules up front. What happens if they cancel a lesson? What happens if they are not there when you arrive? Is it okay for them to invite their friends to split the cost or do you expect extra? Is there easy-access parking?

House calls for private lessons should be expensive. Like a gig, you are hauling yourself and stuff to a place under someone else's control. The kind of person who 'can't make any of the lessons in the area' and who cannot get herself to a private lesson MAY turn out to be a very self-centered person who doesn't care much about anyone's else convenience. So think through several scenerios and stick to your guns, even if you end up being buddies.

I charge $75/hour for private in-home ballroom dance lessons. It's a different market, but thought I'd throw in my 2 cents.

around here groups are 3 a person, 5 a person or 10 a person. pvt lessons..cheapest ive seen is 25/hrly at their house, the average seems to be about 65 a hr though in my area, the more known dancers like ariellah etc. charge about 100 hrly whether that is in person OR online