Skip to main content

    DCF Interview Questions

    The discounted cash flow (DCF) analysis is the most fundamental valuation methodology tested in investment banking interviews. Every IB interview — from first rounds to superdays — will include at least one DCF question. This guide covers the most common DCF questions with detailed answers and the follow-up questions interviewers use to test your depth of understanding. For a step-by-step walkthrough, see our blog post on how to answer 'Walk me through a DCF'.

    What is a DCF and why do bankers use it?

    A DCF values a company based on the present value of its projected future free cash flow. Unlike relative valuation methods (comps, precedent transactions), a DCF is an intrinsic valuation — it values the business based on its own fundamentals rather than what the market is paying for similar companies. Bankers use DCFs because they force you to explicitly state your assumptions about revenue growth, margins, capital expenditure, and the discount rate. This makes it easier to stress-test a valuation and understand what's driving the result. Try our DCF Calculator to practice building one interactively.

    The 5-step DCF framework

    Step 1: Project unlevered free cash flows (UFCF) for 5–10 years. UFCF = EBIT × (1 – tax rate) + D&A – CapEx – changes in net working capital. Step 2: Calculate terminal value using either the perpetuity growth method (TV = final year FCF × (1 + g) / (WACC – g), where g is typically 2–3%) or the exit multiple method (TV = terminal year EBITDA × exit multiple). Step 3: Calculate WACC by blending the cost of equity (via CAPM: risk-free rate + beta × equity risk premium) and after-tax cost of debt, weighted by target capital structure. Step 4: Discount all projected FCFs and terminal value back to present value using WACC. Step 5: Sum the present values to get enterprise value, then subtract net debt and add cash to get equity value, then divide by diluted shares outstanding for implied share price.

    Terminal value: perpetuity growth vs. exit multiple

    Terminal value typically represents 60–80% of total DCF value, making it the single most important assumption. The perpetuity growth method assumes the business grows at a constant rate forever — typically tied to long-term GDP growth (2–3%) to avoid implying the company outgrows the economy. The exit multiple method applies an EV/EBITDA multiple to terminal year EBITDA — this is more commonly used in practice because it's grounded in observable market data. Interviewers will often ask 'Which method do you prefer and why?' — the best answer acknowledges both methods serve as a sanity check on each other.

    Sensitivity analysis and key drivers

    Every DCF should include sensitivity analysis tables on the two most impactful assumptions: WACC and terminal growth rate (or exit multiple). A common interview question: 'What happens to your DCF if WACC increases by 1%?' Answer: the valuation decreases because you're discounting future cash flows at a higher rate, reducing their present value. Similarly, 'What if terminal growth rate increases by 0.5%?' — valuation increases because the terminal value formula (FCF / (WACC – g)) becomes larger as the denominator shrinks.

    Sample Interview Questions & Answers

    QWalk me through a DCF analysis.

    Project 5–10 years of unlevered free cash flows, calculate terminal value (perpetuity growth or exit multiple), determine WACC, discount everything back to present value, sum to get enterprise value, bridge to equity value per share.

    QWhat is unlevered free cash flow and why do we use it?

    UFCF = EBIT × (1 – tax rate) + D&A – CapEx – ΔNWC. We use unlevered (not levered) FCF because the DCF values the entire enterprise, not just equity. The capital structure impact is captured in WACC, not in the cash flows.

    QWhy do we discount cash flows?

    Because of the time value of money — a dollar today is worth more than a dollar in the future due to inflation, opportunity cost, and risk. Discounting converts future cash flows to their present-day equivalent.

    QWhat discount rate do you use in a DCF?

    WACC (weighted average cost of capital) — because we're discounting unlevered free cash flows, which belong to all capital providers. WACC blends the cost of equity and after-tax cost of debt. Use our WACC Calculator to practice.

    QWhat happens to a DCF valuation if you increase the discount rate?

    Valuation decreases. A higher discount rate means future cash flows are worth less in present-value terms. The terminal value — which is the largest component — is especially sensitive to changes in WACC.

    QWhen would a DCF give you a higher valuation than comparable companies?

    When the company's projected growth, margins, or cash flow generation exceed what the market is pricing into comparable companies. This can happen with companies that have underappreciated growth prospects or recent operational improvements not yet reflected in trading multiples.

    Common Mistakes

    • ✗Forgetting to use unlevered (not levered) free cash flow
    • ✗Setting terminal growth rate above long-term GDP growth (implies the company outgrows the economy)
    • ✗Not understanding that terminal value typically drives 60–80% of the total valuation
    • ✗Confusing enterprise value and equity value in the final bridge
    • ✗Using levered beta instead of unlevered beta when calculating WACC for a target capital structure

    Expert Tips

    • Always run sensitivity analysis on WACC and terminal growth rate — interviewers expect it
    • Know why each step matters, not just the mechanics — 'why WACC and not cost of equity?' is a common follow-up
    • Be ready to explain what terminal growth rate you'd use and defend it
    • Practice building a simple DCF from memory in under 10 minutes — some firms give you a modeling test

    Related Concepts

    Discounted Cash Flow (DCF)

    A Discounted Cash Flow (DCF) analysis is an intrinsic valuation method that determines a company's value by projecting its future [free cash flows](https://www.ibflash.com/concepts/free-cash-flow) and discounting them back to present value using the [Weighted Average Cost of Capital (WACC)](https://www.ibflash.com/concepts/wacc).

    Walk Me Through a DCF

    A [discounted cash flow](https://www.ibflash.com/concepts/discounted-cash-flow) (DCF) walkthrough is the single most common technical question in investment banking interviews, asking you to verbally explain how to value a company by projecting its [free cash flow](https://www.ibflash.com/concepts/free-cash-flow), discounting it to present value at [WACC](https://www.ibflash.com/concepts/cost-of-equity), adding a [terminal value](https://www.ibflash.com/concepts/gordon-growth-model), and bridging from [enterprise value](https://www.ibflash.com/concepts/enterprise-value) to [equity value](https://www.ibflash.com/concepts/equity-value). The interviewer is testing whether you understand the logic, not whether you can recite a model.

    Why Is a DCF Sensitive to Terminal Value

    Why Is a DCF Sensitive to Terminal Value refers to the well-known feature of a [discounted cash flow](https://www.ibflash.com/concepts/discounted-cash-flow) analysis in which the terminal value — the lump-sum estimate of all cash flows beyond the explicit forecast — typically represents 60-80% of total enterprise value, so the entire valuation hinges on a handful of long-run assumptions (the [perpetuity growth rate](https://www.ibflash.com/concepts/perpetuity-growth-method), WACC, or exit multiple) rather than on the carefully modeled near-term cash flows. This concentration of value in one estimate is the DCF's biggest practical weakness.

    What's the Biggest Risk to a DCF?

    When an interviewer asks 'What's the biggest risk to a DCF?' they are testing whether you understand where a DCF's value actually comes from and how sensitive the output is to your assumptions. The headline answer: the terminal value, which typically represents 60-80% of total enterprise value, making the DCF extremely sensitive to the terminal growth rate, exit multiple, and discount rate — small changes there swing the valuation enormously.

    Questions to Ask the Interviewer

    'Do you have any questions for me?' closes nearly every banking interview and is a real evaluation — it tests your genuine interest, your research, and your social judgment. The best questions are specific, can't be answered by the firm's website, and invite the interviewer to talk about their own experience, building rapport rather than extracting information.

    Firms That Test This

    Prepare for these firms with our firm-specific interview guides.

    Goldman SachsMorgan StanleyJ.P. MorganBank of AmericaCitigroupBarclaysDeutsche BankUBS

    Practice These Questions with AI Scoring

    Get real-time feedback on your answers — the same evaluation a VP would give you during a live interview.

    Start Free Trial

    More Interview Guides

    Enterprise Value vs. Equity ValueMerger Model & M&A Interview QuestionsLBO Interview QuestionsAccounting Interview QuestionsBehavioral Interview Questions for Investment BankingValuation Methods Interview QuestionsFinancial Modeling Interview QuestionsPrivate Equity Interview QuestionsHedge Fund Interview QuestionsConsulting Case Interview QuestionsRestructuring Interview QuestionsStock Pitch Interview GuideBrain Teasers & Mental Math Interview QuestionsComparable Companies Analysis (Comps) Interview QuestionsPrecedent Transactions Analysis Interview QuestionsEquity Research Interview QuestionsECM & DCM Interview QuestionsComparable Company Analysis Interview QuestionsPrecedent Transaction Analysis Interview QuestionsTerminal Value Interview QuestionsBehavioral Interview Questions for FinanceVenture Capital Interview QuestionsWACC & Discount Rate Interview QuestionsWorking Capital Interview QuestionsFinancial Ratios Interview QuestionsBrainteaser & Market Sizing Interview QuestionsPitch Book Interview QuestionsDebt Structuring & Leveraged Finance Interview QuestionsAdvanced Restructuring Interview QuestionsPaper LBO Interview Questions