Oct 08, 2026 by Offer

Macquarie Interview Questions 2027: NPV and IRR (How to Answer)

Explain NPV as the present value of a project's cash flows minus the initial investment (positive NPV = value-creating), and IRR as the discount rate that makes NPV zero — then compare them: NPV gives an absolute value in currency terms, IRR gives a percentage return, and the two can conflict when projects differ in scale or timing.

What Macquarie Interview Questions Like This Assess

This is a fundamentals check: can you explain the two most common investment metrics clearly and — more importantly — discuss their limitations? Interviewers often follow up with conflict scenarios (a project with higher IRR but lower NPV), so the real test is whether you understand when each metric misleads.

How to Answer Macquarie Interview Questions: The Define-Compare-Conflict Method

NPV: "Net present value discounts all future cash flows at the required rate of return — typically the cost of capital — and subtracts the initial investment. NPV greater than zero means the project creates value; it's measured in absolute currency terms."
IRR: "The internal rate of return is the discount rate at which NPV equals zero — the project's implied breakeven return. You compare it against a hurdle rate: invest if IRR exceeds it."
The comparison and conflicts:
NPV measures absolute value created; IRR measures efficiency of capital (percentage return).
They can conflict: a small project can have a high IRR but low NPV, while a large project shows the reverse. For mutually exclusive projects, NPV is generally the better decision rule because the goal is maximising value.
IRR has technical quirks: multiple IRRs can exist with unconventional cash flow patterns (sign changes), and IRR implicitly assumes reinvestment at the IRR itself, which may be unrealistic.

Sample line: "NPV tells you how much value a project creates in absolute terms; IRR tells you the implied return. When they conflict — say a smaller project with a higher IRR — I'd lean on NPV for mutually exclusive choices, since the objective is maximising value, not the rate."

Common Mistakes

Only giving textbook definitions: The definitions are table stakes. The differentiator is discussing conflicts and limitations.
Forgetting the reinvestment assumption: The IRR reinvestment critique is a classic follow-up — have it ready.
Not mentioning scale: The scale conflict (high IRR, low NPV on small projects) is the most commonly probed scenario.

NPV vs IRR is one of the most classic technical Macquarie interview questions — prepare the conflict scenarios, not just the formulas. This question is commonly reported by candidates.

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FAQ

Which is better, NPV or IRR? For mutually exclusive projects, NPV — it measures absolute value creation. IRR is useful for communicating returns and comparing against hurdle rates.

Can a project have multiple IRRs? Yes, when cash flows change sign more than once (e.g., a project requiring future decommissioning costs), the IRR equation can have multiple solutions.

What discount rate is used for NPV? Typically the project's cost of capital — often WACC for corporate projects or a risk-adjusted required return. The appropriate rate may vary by role and region.

How are NPV and IRR used at Macquarie? Both are standard tools in investment evaluation across infrastructure and energy transactions — confirm how specific teams apply them via the official careers page.

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