Lesson time
Teacher experience
Teacher continuing education and professional memberships
Scheduling and planning for lessons, classes, and recitals
Maintaining student records and studio information
Selecting and purchasing music and other supplies
Researching, preparing, printing supplemental handouts
Incentives and recital expenses
Piano tuning and related equipment costs
Computer, printer, ink, iPad, apps, software
Teacher retirement
. . . and of course . . .
Taxes!