What is Cost-Benefit Analysis?
Cost-benefit analysis compares entered costs and benefits on a shared calculation basis. Monthly amounts are multiplied by 12, while annual and one-time amounts are included as entered. ROI is net benefit divided by costs on that basis. These figures are estimates, not a time-phased cash-flow forecast.
When to use it
Use it before committing resources when you can estimate costs and benefits, including tangible and intangible factors.
How the methodology works
List costs and benefits with their timeframes. Monthly amounts are multiplied by 12; annual and one-time amounts are included as entered. Compare the resulting calculation-basis totals and ROI, then review assumptions and non-financial effects.
- Set the decision and enter each cost or benefit with its timeframe and amount.
- The tool multiplies monthly amounts by 12. Annual and one-time amounts pass through unchanged, so keep those assumptions visible when reading the totals.
- ROI is net benefit divided by calculation-basis costs. The simple payback estimate divides total calculation-basis costs by average monthly gross benefits, then rounds up to whole months.
- Review timing, uncertainty, and non-financial effects separately. The calculation does not model dated cash flows, changing values, or discounting.
Example: Replacing a manual scheduling process
Illustrative situation: A hypothetical operations team is considering scheduling software. Subscription and setup costs are weighed against staff time saved and fewer avoidable rescheduling steps.
How to apply it: The team estimates both sides for the same period, records how it valued time saved, and checks whether the case still holds if adoption is slower than expected.
Example limits: This scenario is illustrative, not evidence about a real business. Use evidence relevant to your decision for your own facts, ratings, probabilities, or financial estimates.
How to read the result
Net benefit and ROI use a shared calculation basis: monthly amounts are multiplied by 12, while annual and one-time amounts are included as entered. The simple payback estimate divides entered calculation-basis costs by average monthly gross benefits, assumes benefits arrive evenly, and is not a dated or discounted cash-flow forecast.
Questions about Cost-Benefit Analysis
How should I handle benefits that are hard to price?
Do not invent a precise monetary value. Record the effect and its evidence separately, or show a range with the assumption stated if a defensible estimate is available.
Is a positive net benefit enough to approve a project?
Not on its own. Check cash timing, execution risk, capacity, strategic fit, and effects that are not represented in the financial estimate.
Are ROI and payback forecasts?
No. Monthly amounts are multiplied by 12, and annual and one-time amounts are included as entered. ROI compares net benefit with costs on that shared basis. Simple payback divides those costs by average monthly gross benefits and rounds up, assuming benefits arrive evenly. Neither result models dated cash flows, changing values, or discounting.
Next step
Choose a time horizon and enter costs and benefits on the same basis. Note the assumptions that have the most influence on the result.
Need a printable resource or a step-by-step method? Business decision-making tools. Compare financial estimates with other ways to structure a choice.