Carmel Utilities is excited to offer residents an easy and convenient method to pay their bills by phone with our automated phone service powered by Invoice Cloud. The pay by phone number is (855) 259-5347. There is no fee for the pay by phone service, but transactional fees for processing payments through Invoice Cloud still apply. The transactional fees for Invoice Cloud processing are $.95 for an electronic check and $2.50 for a credit card.