Framework for Deciding When a Discount Campaign Is Worth Running
Company: Shopify
Role: Product Manager
Category: Product / Decision Making
Difficulty: medium
Interview Round: Other
How would you decide when a business should run a price promotion? Explain which situations or signals would lead you to discount, how you would judge whether a specific promotion is worth its cost at a given moment, and when you would choose not to run one.
```hint Goal first, then the margin math
A discount is a tool, not a goal. Ask what it is meant to achieve right now, whether price is really what stops people from buying, and how much extra demand a thinner margin has to bring in to pay for itself.
```
### Clarifying Questions
- Whose prices are being cut: a merchant discounting products in its online store, or a commerce platform discounting its own subscription plans for merchants?
- Which goal matters most right now: winning new customers, bringing back lapsed ones, hitting a sales target, clearing stock, or responding to a competitor?
- What data is available to judge a promotion: past promotion results, inventory levels, customer purchase histories, competitor prices?
- Are there limits on margin, or on how often discounts can run without damaging the brand's price position?
### What a Strong Answer Covers
- Promotion triggers tied to an explicit business goal, plus a check that price is the real barrier rather than awareness, product fit or checkout friction.
- The economics: the extra volume needed to break even at a given discount and margin, adjusted for sales that would have happened anyway and for demand pulled forward.
- Timing and targeting choices: demand peaks versus slow periods, inventory age, customer lifecycle moments, discount frequency, and who receives the offer.
- A measurement plan with a holdout that judges incremental profit, with guardrails.
- Risks such as margin erosion, customers learning to wait for sales, and price wars.
### Follow-up Questions
- A promotion raised revenue sharply during its week, but sales in the next two weeks fell below normal. How do you decide whether it worked?
- Would you discount during the busiest shopping weekend of the year, when demand is already high, or in a slow month? Defend your choice.
- How would you design a product feature that tells merchants when a promotion is likely to pay off?
Overview: A Shopify product manager interview question about deciding when a price promotion is worth running. It tests whether a candidate ties discounts to a clear business goal, checks that price is the real barrier, reasons about margin and incremental demand, and plans timing, targeting and measurement.
