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How to Add Teeth Whitening to Your Salon: Cost, Licensing, and Profit (2026) Your chair sits empty for fifteen minutes between a color and a blowout. That gap is money you are not making. Adding teeth whitening to your salon turns those fifteen-minute windows into 83 dollars or more in profit, using a service your clients already want and already ask about. This guide walks existing salon and spa owners through exactly how to add teeth whitening to your salon, what it costs, what the licensing r …