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NPV Calculator - Online Net Present Value & IRR

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NPV Calculator

Calculate Net Present Value (NPV) and Internal Rate of Return (IRR) for your investment projects. Free online tool with detailed cash flow analysis and breakdown.

NPV & IRR Tool
Investment Parameters
$
The upfront cost of your investment (positive number).
%
Period Cash Flow ($)
Results
Net Present Value (NPV)
—
Internal Rate of Return (IRR)
—
Total Cash Inflow
—
Payback (Undisc.)
—
Year Cash Flow Discount Factor Present Value
Enter values and calculate to see breakdown

Frequently Asked Questions

What is Net Present Value (NPV)?

Net Present Value (NPV) is a financial metric that calculates the difference between the present value of cash inflows and the present value of cash outflows over a period of time. It uses a discount rate to account for the time value of money — the principle that money today is worth more than the same amount in the future. A positive NPV indicates a profitable investment.

What is Internal Rate of Return (IRR)?

The Internal Rate of Return (IRR) is the discount rate that makes the NPV of all cash flows equal to zero. In other words, it's the expected annual rate of return an investment will generate. IRR is widely used in capital budgeting to compare and rank potential investments. A project is generally considered acceptable if its IRR exceeds the required rate of return (or cost of capital).

How do I interpret a positive vs negative NPV?

Positive NPV: The investment is expected to generate value above the required return. You should accept the project. The higher the NPV, the more value is created.
Negative NPV: The investment is expected to destroy value — returns fall short of the discount rate. You should reject the project.
NPV = 0: The investment breaks even, earning exactly the discount rate. It's a borderline case.

What discount rate should I use?

The discount rate typically reflects the cost of capital, the required rate of return, or the opportunity cost of investing elsewhere. Common choices include the Weighted Average Cost of Capital (WACC), the company's hurdle rate, or a risk-adjusted rate. For personal investments, you might use the rate you could earn in an alternative investment of similar risk (e.g., stock market returns of 8-12%).

What's the difference between NPV and IRR for decision-making?

NPV measures the absolute value created (in dollars), while IRR measures the percentage return. For a single project, both generally lead to the same accept/reject decision. However, when comparing mutually exclusive projects, NPV is considered more reliable because IRR can be misleading when projects differ in scale, timing of cash flows, or have non-conventional cash flow patterns with multiple IRRs.

Can IRR be negative or not exist?

Yes. If all cash flows are negative (or all positive after the initial investment), the IRR does not exist because the NPV never crosses zero. A negative IRR occurs when the sum of all future cash flows is less than the initial investment, meaning the project loses money even at a 0% discount rate. This tool will display "N/A" when IRR cannot be determined.

What are the limitations of NPV and IRR?

NPV limitations: Requires an accurate estimate of the discount rate; doesn't show the return percentage; can be sensitive to long-term cash flow projections.
IRR limitations: May produce multiple values with non-conventional cash flows; assumes reinvestment at the IRR rate (which may be unrealistic); doesn't account for project scale. For best results, use both metrics together alongside payback period and profitability index.

How does the time value of money affect NPV?

The time value of money is the core concept behind NPV. Cash flows received further in the future are discounted more heavily, reducing their present value. This means that projects with earlier cash inflows tend to have higher NPVs (all else being equal). A higher discount rate amplifies this effect, making distant cash flows worth even less today.

What is a good IRR for an investment?

A "good" IRR depends on the context, industry, and risk level. Generally, an IRR above the cost of capital or required rate of return is acceptable. For many businesses, an IRR of 15-25% is considered solid. Venture capital investments may target 30%+ IRRs to compensate for high risk. Always compare IRR against your specific hurdle rate or benchmark.

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