TIR (Taxa Interna de Retorno) — Calculadora Online Grátis
Internal Rate of Return for a series of cash flows — investment viability
The IRR Calculator finds the discount rate at which a series of future cash flows has a Net Present Value of exactly zero — in other words, the annualized return the investment earns. If the IRR exceeds your required return or cost of capital, the investment creates value.
Frequently Asked Questions
Sobre Esta Calculadora
Internal Rate of Return (IRR) is the single most useful metric for evaluating the profitability of investments with irregular cash flows. Unlike simple ROI (which ignores timing), IRR accounts for when each cash flow occurs by finding the discount rate that makes the net present value of all flows sum to zero.
In practice, IRR is used by private equity firms, real estate investors, and corporate finance teams to compare projects with different investment amounts, timelines, and cash flow patterns on a single, comparable metric. A real estate development with an IRR of 18% is directly comparable to a bond yielding 5% — the IRR is the annualized return on invested capital.
The calculation requires iterative numerical methods (like Newton-Raphson) because there's no closed-form algebraic solution. This calculator performs those iterations instantly. Important caveat: if a project has multiple sign changes in its cash flow series (e.g., positive then negative then positive), it may have multiple valid IRR values — a known limitation the calculator flags when detected.
A Calculadora de TIR iguala os valores futuros e presentes.
Fórmula
Solve for r where NPV = Σ(CFt / (1+r)^t) = 0 using iterative Newton-Raphson method
Dicas
- IRR above your cost of capital (WACC) means the investment is profitable.