Amazon Smart Thermostat drops to $57.99 in early Prime Day sale

Amazon's smart thermostat is back on sale for $57.99, turning a routine home upgrade into a closer look at cooling costs just as summer power use rises. ENERGY STAR says the average American household spends almost half of its annual energy bill on heating and cooling, or more than $900 a year, so even a small cut can matter when electricity bills climb.

The device is designed for homes already using Alexa or looking for basic automation without a larger smart-home overhaul. Amazon says the thermostat can connect with select Alexa devices to adjust heating and cooling based on temperature readings or presence detection, and buyers may get an email with information about thermostat rebates from energy providers in their area. Homes with older HVAC systems, or systems that do not have a power wire, are the ones most likely to need the C-wire accessory, which Amazon also sells as a bundle with the thermostat.

The savings case is strongest in households that already spend heavily on heating and cooling. ENERGY STAR says certified smart thermostats are independently certified based on actual field data, and that they save about $50 a year on average, with homes that have high heating and cooling bills saving up to $100 a year. At those rates, the $57.99 price would be recovered in about 14 months for the average household and in about seven months for higher-bill homes.

Prime Day 2026 runs June 23-26, and Amazon says early offers are already available ahead of the four-day event. For households trying to lower summer cooling costs without a large upfront purchase, the timing gives this thermostat a clearer utility case than a typical gadget discount.