Home Energy ROI Calculator
Home Energy ROI Calculator
Model your 30-year energy cost savings and return on investment.
Home details
Based on average existing housing stock energy use (EIA data).
Do not include basement or below-grade space.
Select a zone to estimate energy costs from square footage.
Monthly energy bills
Override estimates by entering your actual bills.
Upgrade path
Assumes ~90% reduction in energy costs
Annual utility rate increases
Historical avg: 6.75% · suggested high: 10%
30-year cumulative energy costs
Important disclaimers — please read before making financial decisions.
This calculator is intended for illustrative and educational purposes only. Projections are estimates based on user-provided inputs and modeled assumptions; actual results will vary. This tool does not constitute financial, engineering, or energy advice.
Square footage: Use above-grade finished square footage only. Below-grade and basement spaces are naturally tempered by ground temperatures and contribute minimally to heating and cooling loads; including them will overstate estimated energy costs.
Energy cost estimates: Existing home estimates are derived from U.S. EIA residential energy consumption data reflecting average housing stock. New construction estimates reflect homes built to current energy codes (IECC 2018–2021), approximately 25–30% more efficient than existing stock. Estimates are a starting point — enter your actual bills for greater accuracy.
Climate zone notice: Net Zero Home savings (~90%) and Net Zero Ready savings (~65–70%) reflect performance in heating-dominated climates (IECC Zones 5–7: Upper Midwest, Northeast, Mountain West). Homes in milder climates (Zones 1–4) may see materially different results.
Rate increase assumptions: The historical average of 6.75%/year is based on long-term U.S. residential utility rate trends. Future rates are not guaranteed and may differ materially from projections.
Upgrade cost variability: Actual costs depend on home size, condition, existing systems, contractor pricing, and available incentives including federal tax credits and utility rebates, which are not reflected in this model.