Whether you are a concert pianist who needs their instrument tuned every performance or a novice piano player on the ol' Joanna out in the basement your tuning needs will depend on the regularity of use. But more importantly, on what will maintain the instrument in good working condition which is the best value in the long run. Pianos are designed to last and develop 'memory' through the twisting of the strings and ageing and must be maintained at pitch to prevent costly remedial work over time. A good rule of thumb is a regular annual 'check-up' at the same time each year when the technician will know to contact you automatically.