Smart Thermostat Savings Calculator
Estimate annual energy savings, payback period, and long-term ROI from upgrading to a smart thermostat.
Inputs
Results
Annual Savings
$186.00
≈ 12 movie tickets
How to Use This Calculator
- Enter your Monthly Heating Cost and Monthly Cooling Cost from recent utility bills.
- Select your Current Thermostat Type — older manual thermostats show the greatest savings potential.
- Enter Heating Months and Cooling Months per year for your climate to annualize the savings calculation.
- Review Annual Savings and Monthly Savings to see the typical 10–23% reduction a smart thermostat delivers.
- Check Percent Reduction to compare against EPA ENERGY STAR estimates for your thermostat model.
- Use Five Year Savings to compare the cumulative return against the device purchase price and installation cost.
How the result changes with Monthly Heating Cost
| Monthly Heating Cost | Annual Savings |
|---|---|
| 100 | $163.00 |
| 350 | $450.50 |
| 650 | $795.50 |
| 900 | $1,083.00 |
What each input means
- Monthly Heating Cost
- Average monthly heating bill during winter months.
- Monthly Cooling Cost
- Average monthly cooling bill during summer months.
- Current Thermostat Type
- 0 = Manual/dial, 1 = Programmable, 2 = Basic smart thermostat.
- Heating Months per Year
- Number of months you actively heat your home.
- Cooling Months per Year
- Number of months you actively cool your home.
What each result means
- Annual Savings
- Total estimated savings per year from smart scheduling and geofencing.
- Average Monthly Savings
- Annual savings divided by 12 months.
- Payback Period
- Time to recoup the ~$200 smart thermostat investment.
- Energy Cost Reduction
- Percentage reduction in total heating and cooling costs.
- 5-Year Net Savings
- Total savings over five years minus the thermostat purchase cost.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersMonthly Heating Cost = 120, Monthly Cooling Cost = 80, Current Thermostat Type = 0, Heating Months per Year = 5 = 5 input(s) provided
- Calculate Annual SavingsAnnual Savings186 = $186
- Calculate Average Monthly SavingsAverage Monthly Savings15.5 = $15.5
- Calculate Payback PeriodPayback Period13 = 13
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