Drill this question with AI
Practice your answer and get instant AI feedback on accuracy and delivery.
Walk me through a DCF analysis.
A DCF values a company by projecting its future free cash flows and discounting them back to present value using WACC. You project FCF for 5-10 years, calculate a terminal value, and discount everything back to get enterprise value.
Why Interviewers Ask This
The DCF is considered the most fundamental valuation methodology because it values a company based on its intrinsic cash flow generation rather than relying on market comparables. Interviewers ask this question to assess your understanding of core finance concepts including time value of money, cost of capital, and cash flow analysis. A strong answer demonstrates you understand how to build a valuation from first principles, which is essential for transaction analysis and client advisory work.
How to Structure Your Answer
Structure your answer in five clear steps: First, explain the concept and why we use DCF. Second, walk through projecting unlevered free cash flow. Third, explain calculating the discount rate (WACC). Fourth, describe terminal value calculation. Fifth, explain how to derive enterprise value and equity value. Keep each section concise but show you understand the key inputs and assumptions at each step.
Key Points to Cover
- Start with historical financials and project revenue growth
- Calculate unlevered free cash flow: EBIT × (1 - Tax Rate) + D&A - CapEx - Change in NWC
- WACC = Cost of Equity × (E/V) + Cost of Debt × (1-T) × (D/V)
- Terminal value via Gordon Growth or Exit Multiple method
- Discount all cash flows back to present value
- Sum of discounted FCFs + discounted TV = Enterprise Value
- Subtract net debt to get equity value
Sample Answer
A DCF, or Discounted Cash Flow analysis, values a company based on the present value of its future free cash flows. The fundamental principle is that a dollar today is worth more than a dollar in the future, so we discount future cash flows back to today's value.
Here's how I'd walk through the process:
First, I'd project the company's unlevered free cash flows, typically for 5-10 years. Unlevered free cash flow equals EBIT times one minus the tax rate, plus depreciation and amortization, minus capital expenditures, minus the change in net working capital. This represents the cash available to all capital providers.
Second, I'd calculate the discount rate, which is the Weighted Average Cost of Capital or WACC. WACC equals the cost of equity times the equity weight, plus the after-tax cost of debt times the debt weight. The cost of equity is typically calculated using CAPM.
Third, I'd calculate the terminal value to capture the company's value beyond the projection period. This can be done using either the Gordon Growth Method, where terminal value equals the final year FCF times one plus the growth rate, divided by WACC minus the growth rate. Or you can use an exit multiple approach.
Finally, I'd discount all the projected free cash flows and the terminal value back to present value using WACC, then sum them up to get enterprise value. To get equity value, I'd subtract net debt from enterprise value.
The key sensitivities in a DCF are the discount rate and terminal value assumptions, since small changes can significantly impact the valuation.
Common Mistakes to Avoid
- Forgetting to discount the terminal value back to present value
- Using levered free cash flow instead of unlevered
- Not matching the terminal growth rate with long-term GDP or inflation expectations
- Confusing enterprise value and equity value
- Not mentioning the key assumptions and sensitivities
Pro Tip
Always mention that DCF is highly sensitive to assumptions, particularly the discount rate and terminal value. This shows you understand the practical limitations of the methodology.
