Have you recently wondered whether it would be worthwhile to have your teeth professionally whitened? Well, let's take a look at this. The lowest possible price per session for teeth whitening in a dental office is about $250, though some places charge more than $1,000. The type of surface stain, whether it be caused brought on by food and beverage consumption, genetics-related, diseases, medical procedures, tooth decay, and any other factor that may affect tooth colour all play a role in pricing.