For: operators, finance leads and dealers supporting a capital proposal
The decision: Does the proposed equipment justify its cash commitment under supportable assumptions?
60-second answer: Compare incremental cash outlay with attributable net cash benefits over a consistent period. Show uncertain benefits separately, especially retention claims, and test a downside case before relying on a payback figure.
Define the comparison first
Pull the proposed installed quote, existing repair and operating costs, actual usage, program economics, disposal offers and the cost of the alternative. State whether the comparison is replacement versus continued operation, one product versus another, or a new service versus no investment. Benefits that occur in both cases are not incremental benefits of the proposal.
Include acquisition, freight, site work, installation, training, removal and transition costs, less supported proceeds. Use measured consumption or a documented estimate for energy; nameplate maximum power alone is not an annual energy bill. Keep noncash accounting charges distinct from this simple cash comparison.
| Line | Preferred record | Common overstatement |
|---|---|---|
| Initial net outlay | Complete quotes and realizable disposal offer | Ignoring access, commissioning or removal |
| Additional contribution | Observed program demand and incremental delivery cost | Counting gross sales as net benefit |
| Avoided cash cost | Costs that actually cease in the alternative comparison | Claiming staff time that cannot be redeployed or reduced |
| Ongoing expense | Service, software, energy and other incremental costs | Omitting costs because they sit in another budget |
| Retention benefit | Evidence of attributable behavior change | Assigning all retained membership revenue to one machine |
Make the arithmetic inspectable
Simple payback = initial net cash outlay ÷ positive annual net cash benefit. Annual net benefit is the attributable incremental cash benefit less the incremental operating cost. This shortcut assumes a stable annual benefit and ignores the timing of cash within the year, discounting and later replacement. If benefits vary, use a period-by-period cash schedule.
Hypothetical illustration, not a benchmark: an initial net outlay of 42,500 currency units and a stable annual net cash benefit of 8,500 produce a five-year simple payback. Dividing 8,500 by 42,500 gives 20%, a simple annual cash-benefit ratio. It is not an internal rate of return or a complete life-cycle return calculation. Change the assumptions before using the example for a real purchase.
Challenge the benefits before setting the hurdle
- What evidence connects the benefit to this equipment?
- Which costs actually disappear, rather than move to another budget?
- What happens with lower use, delayed opening or higher service cost?
- Is the comparison using consistent financing, tax and residual-value treatment?
Do not add an unsupported retention uplift to make a weak case pass. Report nonfinancial reasons, such as accessibility or a required operating capability, separately with their own evidence. Finance should set the evaluation method and hurdle appropriate to the organization; there is no universal acceptable payback for every machine.
Where financing or leasing is involved, compare consistent cash schedules and obtain qualified financial or tax input for those terms. Avoid counting both the full purchase price and all repayment principal as separate costs in the same case.
Before the capital decision
- Rebuild one proposal from sourced incremental cash flows.
- Show base and downside cases, with retention upside isolated if uncertain.
- Assign a post-installation review using the same measures as the approval case.
Continue with FEX
FEX editorial guidance: the decision tools and operating recommendations in this guide are FEX analysis. They are not manufacturer specifications, contractual entitlements or industry benchmarks.
Editorial update, October 7, 2026: Clarified the illustrative arithmetic, distinguished simple cash ratios from ROI/IRR, and removed nameplate-power and unsupported retention shortcuts.
