This calculator estimates the simple payback timeline for a onshore wind investment from net upfront cost and annual net energy benefit.
Project sponsors can use it for a quick comparison of capital options or incentive scenarios. Because the result ignores the timing of cash flows and changing performance, it should be paired with a discounted financial model before an investment decision.
Include the installed project cost on a consistent currency basis.
Enter the yearly value of useful energy or electricity.
Include recurring operation and maintenance expense.
Enter only incentives received near project start.
Compare recovery time with the project life and financial requirements.
Simple payback (years) = (Capital cost − Upfront incentives) ÷ (Annual energy value − Annual operating cost)
The calculation assumes the annual net benefit remains constant. It is a screening metric, not a discounted financial return.
The main result expresses time for cumulative undiscounted net benefits to recover net cost. Use the supporting values to confirm that the scale and assumptions are internally consistent.
Results are planning estimates based on constant inputs and do not replace site-specific engineering, operational, or financial analysis.
Capital cost is $180,000,000, upfront incentives are $0, annual energy value is $24,000,000, and annual operating cost is $5,200,000.
Net investment = $180,000,000 − $0 = $180,000,000. Annual net benefit = $24,000,000 − $5,200,000 = $18,800,000. Payback = $180,000,000 ÷ $18,800,000 = 9.57 years.
The simple payback period is approximately 9.57 years. Discounted cash flow, financing, taxes, degradation, and residual value are not included.
It represents time for cumulative undiscounted net benefits to recover net cost. It reflects only the values entered and should be interpreted within the stated assumptions.
Use one consistent basis. Do not apply a loss, availability, or cost adjustment twice if it is already embedded in another input.
Use 8,784 hours when the measured period is a full leap year and the calculator includes a period-hours field. For planning estimates, 8,760 hours is the conventional annual basis.
Resource variation, curtailment, downtime, equipment degradation, grid constraints, and measurement boundaries can all change realized results.
Yes, if the inputs use matching definitions and periods. For investment or engineering decisions, compare the underlying assumptions as well as the headline result.