This is a question that we often hear, but the answer is broad and wide.
There are questions that must be asked, such as:
Do you want walls only painted? What about the ceiling? What about trim, doors and windows? Do you have crown moulding? Is there chair rail or wainscoting? Do you want good paint that will last for years to come or is your focus more cost economical?
As you can see, there are many factors (a few named above) that can affect the price of an interior painting estimate or price.