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Capital Budgeting Suite

IRR & NPV Calculator

Analyze the "Time Value of Money". Evaluate investment feasibility through the Net Present Value (NPV) and Internal Rate of Return (IRR) metrics.

Investment Scope

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Capital Budgeting

The Physics of
Value Creation

In corporate finance, NPV and IRR are the dual pillars of decision-making. They allow investors to answer the most fundamental question in business: "Will this project generate more wealth than the cost of the capital required to fund it?"

Net Present Value

NPV calculates the current value of a stream of future cash flows, minus the initial investment. If the NPV is positive, the project is literally "adding value" to the firm.

Internal Rate of Return

IRR is the annualized effective compounded return rate that makes the NPV of all cash flows equal to zero. It represents the "Efficiency" of the capital employed.

The Hurdle Rate

Most companies have a "Hurdle Rate" (Discount Rate). If the IRR doesn't exceed this rate, the project is rejected—even if it's profitable in nominal terms.

The NPV Formula

Net Present Value is calculated by discounting each future cash flow back to Year 0:

NPV = ∑ [ CF_t / (1 + r)^t ] - Initial Investment

Where CF_t is the cash flow at time t, and r is the discount rate.

Why IRR is Deceptive

While IRR is popular because it's expressed as a percentage, it has two major flaws:

  1. The Reinvestment Assumption: IRR assumes that all positive cash flows are reinvested at the same IRR rate. In reality, you might only be able to reinvest them at the much lower WACC (Weighted Average Cost of Capital).
  2. Multiple IRRs: If a project has cash outflows in later years (like a mine that needs to be cleaned up), the IRR formula can have multiple valid answers, making it useless.

Choosing the Right Discount Rate

The "Discount Rate" represents your opportunity cost. If you could invest your money in the stock market for a 10% return, your discount rate should be at least 10%. For businesses, the discount rate is usually the WACC (Weighted Average Cost of Capital).

Investment Decision Matrix:

  • • NPV > 0: Accept (Adds wealth).
  • • NPV < 0: Reject (Destroys wealth).
  • • IRR > Discount Rate: Accept (Exceeds hurdle).
  • • IRR < Discount Rate: Reject (Fails to meet target).

Time Value of Money

The core principle of NPV is that $1 today is worth more than $1 tomorrow. This is because you can invest the dollar today and earn interest. The further in the future a cash flow is, the less it contributes to the NPV.

How to Use This Tool

1. Enter your Initial Investment (outflow).
2. Set your Discount Rate (your target return).
3. List your expected Cash Flows for each year. If a year has an expense rather than a profit, enter it as a negative number.