Energy & Sustainability worked example

ISO 50001 Savings at 61% savings capture share achieved: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop savings capture share achieved to 61%, then walk the calculation through step by step. Estimate ISO 50001 energy management savings from managed energy spend, savings rate, capture share, and program cost.

The inputs for this scenario

  • Managed annual energy spend: 2,400,000 $ (held at the documented default)
  • Expected savings rate per dollar managed: 0.05 $ / $ managed (held at the documented default)
  • Savings capture share achieved: 61 % (the input this scenario stresses; the baseline uses 85)
  • Annual EnMS program cost: 42,000 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Captured ISO 50001 savings = managed annual energy spend × expected savings rate × savings capture share.
  • Net ISO 50001 savings works out to 107,880 $ at these inputs, and this is the headline figure for the scenario.
  • Savings per managed energy dollar works out to 0.04 $ / $ managed at these inputs.
  • Captured energy management savings works out to 65,880 $ at these inputs.
  • Annual ISO 50001 program cost works out to 42,000 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where savings capture share achieved sits at 85% and the headline result is 133,800 $, this scenario comes in 19.37% below the baseline at 107,880 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to savings capture share achieved, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. Captured savings are a planning estimate based on an assumed savings rate and capture share; actual verified savings require metered, weather- and production-normalized measurement under an M&V protocol like IPMVP.

Results at a glance

  • Net ISO 50001 savings: 107,880 $ (headline result)
  • Savings per managed energy dollar: 0.04 $ / $ managed
  • Captured energy management savings: 65,880 $
  • Annual ISO 50001 program cost: 42,000 $

Run it with your numbers

  • To rerun this with your own numbers, open the live ISO 50001 Savings calculator, set savings capture share achieved to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.