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Capital Budgeting (NPV & IRR)

Capital budgeting is the process of evaluating long-term investment projects using techniques such as net present value (NPV), internal rate of return (IRR), and payback period.

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Explanation

NPV discounts all expected future cash flows at the required rate of return and subtracts the initial investment — a positive NPV means the project adds value. IRR is the discount rate that makes NPV equal to zero; projects are accepted if IRR exceeds the hurdle rate. The payback period measures how quickly the initial investment is recovered but ignores time value of money. Profitability index (NPV of inflows ÷ initial investment) helps rank mutually exclusive projects. All methods should use after-tax incremental cash flows.

Key Points

  • NPV > 0: accept the project; NPV < 0: reject
  • IRR = discount rate where NPV equals zero
  • Use after-tax incremental cash flows, not accounting income

Exam Tip

When NPV and IRR conflict for mutually exclusive projects, NPV is the preferred method because it measures absolute value added.

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