Cost-Benefit, Payback & NPV
Compare an improvement investment with annual net cash inflows.
Cost-Benefit, Payback & NPV
Browser-only calculations · No input data saved
Worked example results
- NPV (currency units)
- -52.592036
- Present value of net inflows
- 9,947.407964
- Discounted inflows / investment
- 0.994741
- Simple payback (periods)
- 2.5
- Net ROI over horizon (%)
- 20
- IRR (%) — conventional flows only
- 9.701026
Rounded for display only. Export includes the inputs, results, method and assumptions. Refreshing or leaving the tool clears entered data.
How to use Cost-Benefit, Payback & NPV
- Load the worked example to see the required input format.
- Compare an improvement investment with annual net cash inflows. Use consistent units, periods and definitions.
- Select Calculate, review the assumptions and export the result for your project evidence.
Formula and method
NPV discounts year-end net inflows. Simple payback accumulates undiscounted net inflows until the initial outlay is recovered.
Interpretation and assumptions
Cash flows occur at year-end. Enter net inflows after recurring costs. Currency must be consistent. Simple payback is undiscounted. IRR is reported only for a conventional initial outflow followed by non-negative inflows; it is not a guaranteed return.
Results support professional judgement. They are not a certification of process stability, a financial commitment or a substitute for study design.
Frequently asked questions
How do I use the cost-benefit, payback & npv?
Compare an improvement investment with annual net cash inflows. Load the example first, then replace all inputs with consistent process data and select Calculate. NPV discounts year-end net inflows. Simple payback accumulates undiscounted net inflows until the initial outlay is recovered.
What assumptions matter for cost-benefit, payback & npv?
Cash flows occur at year-end. Enter net inflows after recurring costs. Currency must be consistent. Simple payback is undiscounted. IRR is reported only for a conventional initial outflow followed by non-negative inflows; it is not a guaranteed return.
Are my calculator inputs saved or sent to a server?
These native calculations run in this browser tab. Inputs are not sent to a server or saved by this calculator. Download the result if you need a record; leaving or refreshing clears the form.