Grooming a dog can cost anywhere from $10 to $75 per hour, depending on the size of the pet, the number of rounds of service required, and additional services (i.e. nail clipping). Grooming supplies like shampoo, conditioner, brushes/combs, and towels can run you around $30-$60 per year. So if your dog requires regular grooming (at least twice a month), expect to spend around $100 annually on supplies alone!