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fin.net-present-value-IRR Calculator
Calculates NPV, IRR, and Profitability Index simultaneously from initial investment and annual cash flows. NPV and IRR give consistent accept/reject decisions for independent projects — they diverge for mutually exclusive projects, where NPV is the correct criterion.
Inputs
C0
Upfront cost — the negative cash flow at time zero in NPV/IRR analysis.
Cf1
Net cash in (positive) or out (negative) for the period. Enter negative values for costs, positive for receipts.
Cf2
Net cash in (positive) or out (negative) for the period. Enter negative values for costs, positive for receipts.
Cf3
Net cash in (positive) or out (negative) for the period. Enter negative values for costs, positive for receipts.
R Pct
Rate used to bring future cash flows back to today's value. Higher rates make future money worth less — used in NPV, bond pricing, and valuation.
Results
net present value NPV ($)
Sum of all future cash flows discounted to today's dollars, minus the initial investment. Positive NPV means the project returns more than your cost of capital — the investment adds value. Negative NPV destroys value.
profitability index PI
Net profit after all costs (electricity, pool fees, hardware amortisation). Highly sensitive to coin price and difficulty — re-run frequently.
PV of cash flows ($)
Present value of all future cash flows, discounted at the required rate of return. The foundation of DCF (discounted cash flow) valuation.
IRR estimate (use solver for exact)
IRR (internal rate of return) -- the annualised return rate at which net present value equals zero. If IRR exceeds the hurdle rate, the investment adds value.