How much does Billy cost? Tom P 01 October 2019 05:49 Updated For Billy pricing information, head here — www.billycare.com/buy-now/ Billy is yours for as long as you want it. And you can cancel, quickly and easily, at any time. Related articles Where can I buy batteries for the Billy sensors? What batteries do the Billy sensors use? Is there any delivery or shipping fees? When does the billing cycle begin after I place my order? How will Billy know if I'm home or away?