Payback & Life Cycle Cost Calculator

Run simple payback, net present value (NPV), internal rate of return (IRR), and savings-to-investment ratio (SIR) for energy conservation measures. Includes NIST energy price escalation rates from Handbook 135 and cumulative cash flow charts.

Enter project cost, annual energy savings, O&M savings, measure life, discount rate, and fuel escalation rate to compare ECMs on a consistent financial basis. Cumulative cash flow chart shows year-by-year returns.

Built for ESCO investment-grade audits and federal life cycle cost analysis per 10 CFR 436.