Calcular TIR en calculadora científica

To calculate the IRR without struggling with a scientific calculator, the quick method is to set the NPV equal to zero and iterate the discount rate until it matches—which is exactly what Excel's IRR function does under the hood. If you'd rather not create a spreadsheet, I use this online calculator that solves it for you by inputting the cash flows: https://aliciacalculadoras.es/. It's especially useful when the cash flows aren't constant, as manual calculations can take forever.