2. It ignores the cash flows after the payback period
3. It lacks a decision criterion grounded in economics
2. Initial Development Costs
3. Increase in Net Working Capital (Increase Inventories, Raw Materials, etc.)
2. Incremental Costs
3. Taxes
4. Change in Net Working Capital (change in inventories, raw materials, accounts receivable and payable)
2. In other cases, the IRR may disagree with NPV
2. Shutdown Costs
3. Decrease in Net Working Capital (Decrease in inventories, raw materials, etc)
The Marginal Corporate Tax Rate
2. Project Externalities (Cannibalization)
3. Sunk Costs (Fixed overhead expenses or Past R&D)
4. Adjusting Free Cash Flow (time of CF and Accelerated depreciation)
Accept if the payback period is less than required, Reject if it is greater
- In general, it is dangerous to use the IRR in choosing between projects
- Always rely on NPV