Retail & Ecommerce

Retail Buying interview questions

Buying interviews test commercial numeracy before taste. Expect assortment planning, open-to-buy, margin and markdown arithmetic you are asked to do out loud, vendor negotiation, how you form a trend view without guessing, and a direct question about a buy that went wrong. Open-to-buy is the concept that separates practitioners from applicants.

9 questions (1 easy · 5 medium · 3 hard), each with what a strong answer covers and where people lose the point. Free to read, no account.

On this page (9 questions)

1.What is open-to-buy and how do you use it?

Core

What a strong answer covers

  • Open-to-buy is the value of inventory a buyer can still commit to receive in a period without breaking the planned closing stock position.
  • It comes out of the merchandise plan: planned sales and planned closing stock plus planned markdowns, less current stock and orders already placed for that period.
  • It is dynamic, so trading ahead of plan opens capacity and trading behind it closes capacity, and it is recalculated as the season runs rather than set once.
  • Practically it decides what you can chase mid-season, which is why buyers deliberately leave some open rather than committing the whole plan up front.
  • A strong answer says what happens when it is overspent: excess stock leads to forced markdown, damaged achieved margin, and a cash and space problem for the next season. Exact formulas and cadence vary by retailer.

Where people lose the point

  • Describing it as a fixed budget rather than a receipts constraint driven by the stock plan.
  • Forgetting that placed orders consume it before anything arrives.
  • Committing the entire plan pre-season and leaving nothing to chase with.
Link to this question

2.An item costs 40 and retails at 100. What is the margin, and what is the markup?

Warm-up

What a strong answer covers

  • Gross margin is expressed on the selling price: 100 less 40 is 60, over 100, so 60 percent.
  • Markup is expressed on cost: 60 over 40, so 150 percent on cost.
  • State which basis you are using before quoting a number, because the same transaction produces very different-looking figures.
  • A strong answer notes that quoted margin is usually before markdowns and promotions, so the maintained or achieved margin on this item will be lower if any of it sells at a reduced price.

Where people lose the point

  • Quoting 150 percent as the margin.
  • Giving a number without saying whether it is on cost or on retail.
  • Treating initial margin as the margin the business will actually earn.
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3.How do you build a seasonal assortment?

Core

What a strong answer covers

  • Start from the plan and the customer: what the sales and margin targets are, who this range is for, and what the space or digital range capacity actually allows.
  • Review last season by what sold rather than what was liked, looking at sell-through, rate of sale, markdown taken and where the range had gaps or duplication.
  • Build the price architecture first, with defined entry, core and higher price points, so the range covers the customer's willingness to pay without cannibalising itself.
  • Split the range between continuity or core lines, seasonal repeats, and genuinely new or risk-taking product, sizing the risk portion to what the plan can absorb if it fails.
  • A strong answer plans breadth against depth deliberately, sequences deliveries through the season rather than landing everything at once, and holds open-to-buy back to chase what sells.

Where people lose the point

  • Building the range from personal taste and justifying it afterwards.
  • Filling every price point and option until the range duplicates itself.
  • Committing all receipts up front with no capacity to react.
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4.How do you form a view on what will sell next season?

Core

What a strong answer covers

  • Start with your own sales data, because rate of sale, sell-through by attribute and what customers searched for and could not find is the most reliable signal you own.
  • Layer external inputs: supplier and market intelligence, what is happening in comparable markets and adjacent categories, and trade shows or trend services where the business subscribes to them.
  • Separate a direction from a bet: a colour or silhouette direction can be expressed across the range cheaply, while a specific bet needs sizing so a miss is affordable.
  • Test where you can, with a limited buy, a small number of locations or an online-first drop, and set in advance what result would trigger a repeat.
  • A strong answer is explicit that forecasting is probabilistic and manages it through option sizing and reaction speed rather than claiming accuracy.

Where people lose the point

  • Relying entirely on trend services with no reference to the retailer's own data.
  • Backing a trend with depth before any evidence of demand.
  • Describing forecasting as a skill of being right rather than of limiting the cost of being wrong.
Link to this question

5.What do you negotiate with a vendor beyond unit cost?

Core

What a strong answer covers

  • Payment terms, which affect working capital and can be worth more than a small cost reduction.
  • Minimum order quantities and the ability to place smaller repeat orders, which is what makes chasing possible.
  • Lead times and delivery phasing, since a range that lands late is worth less regardless of what it cost.
  • Commercial support such as markdown or damage allowances, marketing contribution, returns of faulty goods, packaging requirements, and exclusivity on a style or colourway where it matters.
  • A strong answer talks about the relationship as a repeated game: pushing a supplier to an unsustainable price tends to reappear as quality problems, deprioritised capacity or a lost supplier at the worst moment. What is available varies significantly by category, market and supplier scale.

Where people lose the point

  • Reducing negotiation to cost price alone.
  • Winning terms the supplier cannot sustain and losing reliability.
  • Ignoring lead time and phasing, which determine whether the range trades at full price.
Link to this question

6.Six weeks into the season a key line is selling at half the rate you planned. What do you do?

Hard

What a strong answer covers

  • Diagnose before discounting: check availability and size or variant breaks, where the product sits in store or in the digital hierarchy, whether it has any marketing support, and whether the issue is the product or its visibility.
  • Compare against the rest of the range and the category, since a whole-category slowdown is a different problem from one line failing.
  • Fix the cheap causes first if they exist, including moving the position, correcting imagery or copy, adding it to a relevant edit, or fixing a stock allocation problem.
  • If the product is genuinely not selling, act early rather than late: a smaller markdown taken now usually clears more units and costs less margin than a deep one taken at the end.
  • A strong answer covers the supply side too, cancelling or delaying outstanding orders where terms allow, and records the miss so the next buy in that area reflects it.

Where people lose the point

  • Marking down immediately without checking availability or visibility.
  • Waiting for the end of season and taking a much deeper markdown.
  • Leaving on-order units in place when the buy has already been proved wrong.
Link to this question

7.Tell me about a buy that went wrong. What happened and what did you change?

Hard

What a strong answer covers

  • Set the decision up honestly: what you bought, why you believed in it at the time, and what evidence you had, so the interviewer can judge the reasoning rather than the outcome alone.
  • Say what actually happened with real figures if you are able to share them, or in proportional terms if not, including the markdown taken and the effect on the category's achieved margin.
  • Separate a bad decision from bad luck. Overbuying depth on an untested style is a process failure, while a supply disruption is not, and interviewers listen for whether you can tell the difference.
  • Describe the actions you took once it was clear, and how quickly, since reaction time is the part of a bad buy a buyer controls.
  • A strong answer ends with the change in practice that followed, whether that is a smaller test buy, holding more open-to-buy, or a different way of sizing a risk option, and shows it applied to a later season.

Where people lose the point

  • Choosing an example where nothing was really lost, which reads as evasion.
  • Blaming the supplier, the weather or the marketing team for all of it.
  • Describing the mistake with no change in practice afterwards.
Link to this question

8.How do you decide when and how deeply to mark down?

Hard

What a strong answer covers

  • Start from the stock position and the remaining selling weeks: how many units are left, at what current rate of sale, and whether they will clear before the season ends without help.
  • Weigh the cost of the markdown against the cost of holding: cash tied up, space that a better-performing line could occupy, and the risk of a deeper cut later.
  • Consider the shape of the reduction: an early modest cut can clear more units at better margin than a late deep one, though which works depends on the category and how price-sensitive the customer is.
  • Take account of anything else running commercially, so the markdown does not collide with a planned promotion or undercut a full-price launch in the same area.
  • A strong answer measures the result against the plan and feeds it back into buy depth for the same period next year rather than treating markdown as a purely reactive act.

Where people lose the point

  • Delaying markdown to protect a reported margin figure while the stock ages.
  • Applying a blanket percentage across a category regardless of individual line performance.
  • Never reviewing whether the markdown achieved what it was meant to.
Link to this question

9.How do you decide between breadth and depth in a range?

Core

What a strong answer covers

  • Breadth gives choice and covers more customer needs, depth commits volume behind fewer options and earns better cost prices and stronger in-stock positions.
  • The right balance follows the category: fashion-led areas with short lifecycles favour breadth with shallow buys and fast reaction, while core replenishable product favours depth and availability.
  • Space and range capacity are a hard constraint, and every option added divides the same demand, so breadth beyond a point simply lowers rate of sale per option.
  • Depth is a bet on a specific option being right, so it belongs on proven core lines and on options that have some evidence behind them rather than on untested newness.
  • A strong answer connects the decision back to open-to-buy, since breadth and depth both consume the same receipts capacity.

Where people lose the point

  • Adding options to make the range look full without checking demand per option.
  • Buying depth on unproven newness.
  • Discussing range shape without reference to space or receipt capacity.
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What is open-to-buy and how do you use it?

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How Retail Buying answers get judged

The weights a Retail Buying interviewer is holding, whether or not they say so out loud. Round Zero scores your practice answers against exactly these, and quotes your own words back as the evidence for each.

Commercial numeracy

35%

Handles margin, markup, markdown, sell-through and inventory maths accurately and out loud. Understands how open-to-buy constrains the season and what happens to margin when a buy is wrong.

Assortment and range judgement

25%

Builds a range that fits the customer, the space and the budget, balancing core and newness, price architecture and breadth against depth. Justifies choices with data and customer logic rather than personal taste.

Vendor negotiation and management

20%

Negotiates terms beyond unit price, builds supplier relationships that survive a bad season, and manages risk on lead times, minimums and exclusivity.

Trading response and ownership

20%

Reads early sales signal, acts on it in time to matter, and owns a bad buy openly including what it cost and what changed afterwards.

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Now say them out loud

You have read what strong Retail Buying answers contain. The next thing that moves the needle is producing one under time, out loud, and finding out where it falls apart.

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  • Flashcards for the ones you keep missing
  • A scored mock that quotes your own answers

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Practising Retail Buying: common questions

What Retail Buying interview questions should I practice?
Start with the core areas Retail Buying interviewers probe: What is open-to-buy and how do you use it; An item costs 40 and retails at 100. What is the margin, and what is the markup; How do you build a seasonal assortment. This page outlines strong answers and common mistakes, and the scored path drills each one with follow-ups.
Is the Retail Buying practice free?
Yes. The Retail Buying path runs free inside Round Zero: lessons, practice questions and flashcards. Drills are unlimited on every plan, free included. So is the full scorecard. Free also covers 3 complete scored interviews, no card.
How is this different from a Retail Buying question list?
A static list gives you questions with no feedback. Round Zero runs a live scored practice that probes your actual answers, rotates difficulty, and tells you exactly what to fix, grounded in a Retail Buying rubric.
How should I prepare for a Retail Buying interview?
Learn the concepts, drill the questions until answers come fast, then prove it in a scored mock. Round Zero sequences all three so you know you are ready, not just that you read about Retail Buying.
How is a Retail Buying answer scored?
Retail Buying answers are scored on commercial numeracy, assortment and range judgement, vendor negotiation and management, trading response and ownership, with evidence quoted from what you actually said, so feedback is specific instead of generic praise.