Smart Thermostat Energy Savings Calculator
Find out exactly how much a smart thermostat will save you and how fast it pays for itself. Personalized results for five consensus-rated thermostats based on your energy bill, climate zone, and available rebates.
Step 1: Your Energy Profile
Adjust the inputs below to match your household. Results update instantly.
$50 - $500 / month
ENERGY STAR: heating/cooling is ~50% of a typical US bill
Most US utilities offer $50-$150 for ENERGY STAR thermostats. Check your local rebate
Step 2: Your Personalized Results
Based on $150/mo bill, 50% heating/cooling, Manual (no programming) thermostat, Moderate (CA, NC, TN) climate, $75 rebate.
Ecobee Premium
Best sensors + occupancy detection
Nest Learning
Advanced learning + Nest Renew
Honeywell T9
Room sensors, solid performer
Ecobee3 Lite
Baseline smart thermostat
Amazon Smart
Budget pick, Honeywell internals
5-Year Net Savings Comparison
How we calculate these numbers
Annual heating/cooling spend = monthly bill x 12 x heating/cooling %. Savings percentage depends on your current thermostat type (manual: 15%, programmable: 10%, smart upgrade: 3%) per ENERGY STAR guidelines. Climate multiplier adjusts for regions with higher heating/cooling demand. Per-product multipliers reflect sensor capability and learning algorithms based on manufacturer data and expert testing. Payback = (price - rebate) / monthly savings. Five-year net = (annual savings x 5) - price + rebate.
Ready to buy?
See our full smart thermostat buying guide with expert consensus scores, or read our detailed energy savings analysis.
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