IRR Calculator

Internal rate of return from an initial investment and equal annual cash flows.

IRR Calculator helps you internal rate of return from an initial investment and equal annual cash flows. Enter initial investment, cash coming back each year, and number of years, review the breakdown, and use the guidance below to understand what the number means — and what it does not. What the IRR calculator does IRR Calculator is built for money decisions — loans, savings, payments, and taxes. Internal rate of return from an initial investment and equal annual cash flows. You enter initial investment, cash coming back each year, and number of years, then Simple Calculators computes the result instantly. Rates, fees, and tax rules vary by lender and country, so treat results as planning numbers, not a contract. How the math works Enter the Initial investment, the Cash coming back each year and the Number of years (rounded to whole years). The IRR (internal rate of return) is the yearly rate r where investment = cash ÷ (1 + r) + cash ÷ (1 + r)² + … for every year. The calculator finds r by trying rates between −99% and 500% a year until both sides match. Payback time is how long until the cash back covers the investment; if that does not happen within the years entered, it says s…