NPV vs IRR: Key Differences, Pros and Cons for Smarter Investment Decisions

What is Net Present Value (NPV)?

Net Present Value (NPV) measures the difference between the present value of future cash inflows and the initial investment. It helps investors understand whether a project is expected to add value after considering the cost of capital.

• A positive NPV means the investment is expected to create value.
• A negative NPV means the investment may reduce value.
• An NPV of zero means the project is expected to break even.

NPV Formula

NPV = Σ [Cash Flow ÷ (1 + r)^t] − Initial Investment

Example

A company invests ₹1,00,000 and expects cash inflows of ₹40,000 each year for three years. If the discount rate is 10%, the present value of future cash flows is about ₹99,474.

NPV = ₹99,474 − ₹1,00,000 = -₹526

Since the NPV is negative, the investment is unlikely to create value.
 

What is Internal Rate of Return (IRR)?

Internal Rate of Return (IRR) is the discount rate at which the NPV of a project becomes zero. In simple terms, it is the break-even rate of return for an investment.

A project is generally considered acceptable when its IRR is higher than the required rate of return or the company's cost of capital.

IRR Formula

There is no direct formula to calculate IRR. It is found by solving:

NPV = 0

Because the calculation is iterative, most investors use spreadsheet tools such as Excel's =IRR() function or an online calculator.

You can also use the 5paisa NPV Calculator to estimate investment value before comparing it with IRR.
 

Difference Between NPV and IRR

Worked Example: NPV and IRR Calculation

Suppose a business invests ₹5,00,000 in a new project.

Assume the cost of capital is 10%.

• NPV = ₹46,000 (approx.)
• IRR = 15.2% (approx.)

Decision

Since the NPV is positive and the IRR is higher than the cost of capital, the project is financially attractive.

Advantages and Disadvantages of NPV

Advantages and Disadvantages of IRR

Limitations of NPV and IRR

Both methods have limitations.

IRR may produce more than one result when cash flows change direction several times. It also assumes that future cash flows are reinvested at the same IRR, which may not be realistic.

NPV depends heavily on the chosen discount rate. Even small changes in this rate can affect the final result.

In many cases, finance professionals also use the Modified Internal Rate of Return (MIRR), which addresses some of the reinvestment assumptions made by IRR.
 

When Should You Use NPV vs IRR?

When NPV and IRR Conflict: Which Should You Trust?

Sometimes NPV and IRR rank projects differently. This usually happens when projects require different investment amounts or generate cash flows at different times.

For example, one project may deliver a higher percentage return but create less total value. Another project may have a lower IRR but generate a higher NPV.

In such cases, finance professionals generally rely on NPV, especially when choosing between mutually exclusive projects, because it focuses on value creation rather than percentage returns.
 

Conclusion

However, the IRR approach and the NPV approach do not compete against each other. Both the approaches are complementary to each other. The IRR approach makes one aware of the expected rate of return whereas the NPV approach informs one about the possibility of creating value from an investment.

To conclude, whenever you find that the NPV is positive and the IRR is greater than your required rate of return, then you should definitely invest. You may also learn about different investment planning tools available at 5paisa.