Answer:  Tuning & servicing your piano is a normal part of piano ownership. The main reasons a piano goes out of tune, are the atmospheric variations (temperature changes) and the nature of a piano's construction. If the piano is new or newly repinned, it should be tuned 3 or 4 times in the first year.

A good rule of thumb for the average household in a moderate climate is to tune the piano when the heat goes on in the Fall, and again when the heat goes off in Spring. If you're sensitive to tuning or if you live in a very dry or humid climate, your may want your piano tuned  3 times or more each year.

To put the matter of tuning into perspective, remember that a concert piano is tuned before every performance and as the concert hall fills up, the temperature goes up, so it's usually tuned again at intermission.  A piano in a professional recording studio, where it is in constant use, is tuned 3 or 4 times each week as a matter of course.
If you leave your piano for years without tuning, moisture will collect on the strings, consequently they rust and lose their tone.

Depending on where you live, piano tuning can cost anywhere from $60.00 to $150.00 a tuning.  With one of our tuning kits, you can learn how to tune your piano yourself, or just 'Sweeten' some sour notes in between regular tunings.  It's a great way to make extra money too!