Every piano manufacturer states that a piano should be tuned twice a year—although many technicians, myself included, generally say once per year is sufficient for many pianos. While that is a good rule of thumb, there are several variables that might alter that schedule for your individual situation.
Quick Summary: Does your piano need tuning?
New Pianos: 2+ times per year (to stretch new strings).
Average Home Pianos: Once per year is usually sufficient.
Professional/Heavy Use: 2 to 4 times per year.
The “Golden Rule”: Never go more than 2 years, or you’ll likely need a “pitch adjustment.”
1. The Age of the Piano
New pianos should absolutely be tuned at least twice per year in their first couple of years. New strings will stretch during this period, and it is important they are “trained” to bend at the correct place as they cross the bridge. Diligence now means a more stable piano for the rest of its life.
2. The Quality of the Instrument
Just like you might expect a Mercedes S-Class to outlast and perform better than a Ford Fiesta, the quality of a piano affects how well it stays in tune. The quality of wood used in the pinblock, soundboard, and bridges makes a significant difference in stability.
3. Current Condition
As pianos age, wood naturally dries out. If a pinblock loses moisture, the holes holding the tuning pins enlarge, reducing the friction that grips them. Loose pins mean more frequent tuning is necessary—especially for pianos near working fireplaces or in unusually dry environments.
4. Consistency of the Environment
This is the #1 factor affecting tuning stability. Humidity and temperature swings cause the soundboard to swell and contract. Ideally, a piano should live at about 72 degrees with a relative humidity in the low 40s. Avoid outside walls, windows, doors, and air vents!
5. Frequency of Use
Pianos used heavily—such as those belonging to teachers, serious students, or churches—should be tuned at least twice per year. Prominent venues often have their pianos tuned before every single performance.
6. The Size of the Piano
Larger pianos (grands and tall uprights) have soundboards with more surface area. This means they expand and contract even more with weather changes. Surprisingly, these larger instruments often require more frequent tuning than smaller models.
7. The Time of Year
If you tune once per year, stick with the same month so atmospheric conditions are similar each time. If you tune twice per year, I recommend Spring and Fall. I do not recommend Winter and Summer, as the humidity extremes are too different.
8. Your Own Standards
Everyone has different tolerances. At a university, I knew a Piano Professor who rarely requested tuning, while a Trumpet Professor was driven crazy if his piano wasn’t tuned every two weeks. Your individual “ear” plays a big role in your schedule.
Summary
If your piano is new, heavily used, older, or in an inconsistent environment, aim for two or more times per year. For most home pianos, once per year is sufficient. Just don’t go past the two-year mark, or your next tuning will be much more difficult (and expensive) due to the need for a pitch adjustment.
In the St. Louis area? I would love to be your piano tuner. Use my Tuning Frequency Calculator to see a customized recommendation for your specific instrument!