Estimate the internal rate of return for a series of cash flows.
IRR is the discount rate r where: 0 = Σ [Cash flow at time t ÷ (1 + r)^t]The calculator applies the relevant rate-of-change, discounting or return relationship to the entered values and time period. Cash-flow timing, compounding, fees, taxes and inflation must be entered or evaluated separately unless the tool provides a field for them.
IRR Calculator converts the entered starting values, ending values, cash flows or rates into a comparable percentage or financial measure. Estimate the internal rate of return for a series of cash flows. The result is useful for checking assumptions and comparing scenarios on a consistent basis.
It is an estimate generated from the values entered on this page and the calculation method shown in the formula and methodology sections.
The calculator validates the entered values, applies the protected formula shown on the page and then rounds only the displayed result where appropriate.
Use current source values, confirm units and time periods, include every requested cost or measurement, and avoid rounding inputs before the final calculation.
Different calculators may use different assumptions, time periods, rounding rules, reference standards or included costs. Compare the inputs and limitations before comparing answers.
No. Use it for scenario planning, then validate revenue, cost, tax and timing assumptions against current records and qualified professional advice.
Recalculate whenever a material input changes, such as a rate, price, balance, measurement, time period, fee, contribution or project dimension.
Calculate the measure using the expected values, then change the time period, cost or ending value. A second scenario helps show whether the result is driven by performance, timing or the initial amount.