Three lengths, three different lessons. The most expensive one isn't the best one for most people.
Thirty minutes: $50
Right for young beginners and for anyone whose practice week is short. Thirty focused minutes is about as long as a nine-year-old can concentrate meaningfully, and a shorter lesson every week beats a longer one every two weeks by a wide margin. It's also the right choice when a student isn't yet practicing enough to fill an hour with material.
Forty-five minutes: $75
The most useful length for most students past the first year. There's time to cover technique, work on repertoire, and still deal with whatever went wrong during the week, without the last stretch turning into fatigue. If you're unsure, this is usually the answer.
Sixty minutes: $100
Right when there's a real hour of work: an audition or exam being prepared, a student doing theory or composition alongside playing, or an adult who practices seriously and arrives with questions. It's also the right length for improvisation work, which needs room to play rather than being squeezed in at the end.
How to tell you're on the wrong one
The lesson keeps running out before the thing you came to work on. That's a signal to go longer. Or the last ten minutes are visibly tired and nothing lands. That's a signal to go shorter, and it isn't a failure. A student on the right length improves faster than one on a longer one they can't sustain.
Changing
The length isn't a contract. Young students frequently start at thirty and move to forty-five after a year, and adults preparing for something specific often go up for a few months and back down afterwards. Say so and it changes from the next lesson.
In person around Cincinnati, Covington and Newport, or online, and online is a real lesson rather than a fallback. For theory, composition and transcription it's often the better one. The rest of the numbers are on the pricing page.