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Corporate Finance

Budgeting interview questions

6 budgeting questions of the kind asked in corporate finance interviews. Each carries a model answer, the concepts a complete response must hit, and graded feedback on your own attempt.

1.Budget Versus Forecast

Easy

A common first-round FP&A question testing whether candidates understand the planning cadence.

What is the difference between a budget and a forecast? If revenue is tracking below plan in April, which number should management use to run the business?

Commonly asked at Microsoft, Amazon, Google~7 min
Model answer & graded attempt

2.Building a Headcount Plan

Easy

A core planning exercise because people costs are the largest controllable expense at many companies.

Walk me through how you would build a headcount and compensation plan for the next fiscal year. What errors would make the plan unreliable?

Commonly asked at Microsoft, Amazon, Salesforce~8 min
Model answer & graded attempt

3.Fixed Versus Variable Costs

Easy

A foundational question for explaining operating leverage and building downside scenarios.

Explain fixed, variable and semi-variable costs. Why does the distinction matter when revenue falls below plan?

Commonly asked at McKinsey, Amazon, Delta Air Lines~7 min
Model answer & graded attempt

4.Explaining a Monthly Variance

Medium

The recurring deliverable of an FP&A team, and interviewers ask for the method.

Revenue came in $4m below budget for the month. How do you explain it, and what does a useful explanation contain?

Commonly asked at Amazon, Google, Salesforce~10 min
Model answer & graded attempt

5.Zero-Based vs. Incremental Budgeting

Medium

Common in FP&A and corporate strategy interviews.

Compare zero-based budgeting with incremental budgeting. When would you implement ZBB, and what typically goes wrong?

Commonly asked at Bain, Kraft Heinz, 3G Capital~9 min
Model answer & graded attempt

6.Run a Cost Freeze Without Breaking the Operating Plan

Hard

A business-partnering case for an FP&A candidate asked to preserve a cash target while making real capacity trade-offs across functions.

Mid-year, the CFO needs $12m of incremental cash savings while preserving the product launch scheduled for the fourth quarter. Sales asks to keep all planned hires, product asks to protect contractors, and operations…

Commonly asked at Microsoft, Amazon, Salesforce~15 min
Model answer & graded attempt

Practise these under interview conditions.

Write your answer, get it graded on technical accuracy, completeness and communication, and see exactly which mechanic you missed.

Firm names indicate where a question type is commonly reported in interviews. They are not sourced from, endorsed by, or affiliated with the firms named.

Budgeting interview questions · Prepalyst