$150 for a tuning.
If your piano hasn't been tuned in a few years,
you might consider a pitch raise as well, which is $75 additional.
How often should I have my piano tuned?
Every manufacturer recommends that you tune your piano at least twice a year.
In many cases, that is not necessary or practical unless you hear big differences in your piano between seasons.
More importantly, if you tune your piano only once a year,
try and tune it around the same time each year.
Some pianos go quite sharp or high in pitch in the summer months
and then very flat in the winter when the heat comes on.
Several factors contribute to that problem.
The piano may be subjected to direct sunlight or direct heat from a floor register,
or the piano could be subjected to a swamp cooler, which is also harmful.
The piano may be of poor quality with a weak structure that cannot withstand
the relative humidity changes that occur each season.