How does a change in cost of capital affect the IRR?

The Internal Rate of Return (IRR) is the discount rate that makes the net present value (NPV) of a project zero. A change in the cost of capital does not directly affect the IRR itself, as IRR is a project-specific metric; however, it influences the decision-making process. If the cost of capital rises above the IRR, the project may be deemed less attractive, as it suggests that the project's returns do not meet the required threshold. Conversely, if the cost of capital is below the IRR, the project is generally considered favorable.