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IRR Calculator

Find the periodic rate or rates where the net present value of your entered cash-flow series equals zero.

Enter periodic cash flows

Enter values and select Calculate.

Bounded IRR solver

The solver transforms r with x = ln(1 + r), scans 4,096 deterministic intervals from −99.99% through 10,000%, refines every sign-change bracket by bisection, and deduplicates converged roots.

Multiple or absent roots

Non-conventional cash flows can have multiple IRRs; every supported root is shown. If none is found in the documented range, the tool says so. IRR is per cash-flow period and is not silently annualized or presented as a guaranteed return.

Worked example

The editable values above provide a complete worked example. Select Calculate to see the formula result and, where applicable, its payoff or period-by-period breakdown.

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