The Utility Savings Estimator measures the financial effect of reducing a recurring utility bill. It compares a current monthly cost with an expected percentage reduction and shows monthly, annual, and multi-year savings.
This tool is useful when evaluating efficiency upgrades, provider changes, conservation plans, or service cancellations. It focuses on gross bill savings; installation costs, financing, maintenance, rebates, and changing utility rates should be considered separately when making an investment decision.
1. Enter the current bill
Use the monthly utility cost affected by the proposed change.
2. Estimate the reduction
Enter the portion of the current bill expected to be avoided.
3. Choose a savings period
Select the number of whole years over which to accumulate savings.
4. Add the upfront cost
Include equipment, installation, cancellation, or switching costs paid at the start.
5. Interpret gross and net results
Gross savings exclude the upfront cost; net savings subtract it once.
The model assumes a constant bill, constant savings rate, and no time value of money.
Annual gross savings is the modeled reduction in utility spending over one full year.
Net savings can be overstated if maintenance, financing, or reduced equipment performance are omitted.
Given: A $280 monthly bill, an 18% reduction, a 5-year period, and an $800 upfront cost.
Calculation: Monthly savings = $280 × 0.18 = $50.40. Annual savings = $604.80. Net five-year savings = $604.80 × 5 − $800 = $2,224. Payback = $800 ÷ $50.40 = 15.9 months.
Result: The change is modeled to save $604.80 per year and $2,224 after the upfront cost over five years.
Enter the net amount you expect to pay after confirmed rebates or incentives. Keep uncertain incentives separate in a second scenario.
No. It holds the current bill and reduction percentage constant, so it is a simple planning model.
It means the modeled gross savings during the selected period do not recover the entered upfront cost.
Yes. Enter a 100% reduction for the portion of the bill that will disappear.
No. Simple payback measures how long gross savings take to recover the upfront cost and ignores financing, discount rates, resale value, and later costs.