You would not hire a chef without tasting the food. You would not hire a developer without looking at code. Yet when we hire salespeople, most of us do the equivalent of hiring the chef based on a really good conversation about cooking.
I have done this too. It is seductive, because strong salespeople are, by definition, good at the interview. The interview is a sales call where they are the product. The danger is obvious once you say it out loud: you can end up selecting for the person who interviews best, which is a different skill from the person who sells best.
A pre-employment sales assessment closes that gap. Instead of asking a candidate to describe how they would sell, you ask them to actually do it, in conditions close to the real job, and you score what you see. Done well, it is one of the most predictive things you can put in a hiring process.
Why work samples beat interviews for sales
The reason is not opinion. It is one of the most consistent findings in the entire body of selection research. Decades of meta-analysis place work samples, which measure how someone performs an actual task, among the stronger predictors of job performance, alongside structured interviews and general mental ability (Schmidt & Hunter, 1998; Sackett et al., 2022). An unstructured interview, by contrast, is a weak predictor that we trust far more than it deserves.
The logic is intuitive. A work sample measures the behaviour you are actually buying. When you watch a candidate run a discovery call, handle an objection, or build a short account plan, you are observing the job, not a story about the job. This is the heart of our Final Candidate Review: hire the person who can sell, not the one who interviews well.
To be fair to the humble interview, the answer is not to throw it out. A structured interview, with the same job-relevant questions and a consistent scoring guide for every candidate, is itself a solid predictor (Sackett et al., 2022). The strongest processes stack a structured interview and a scored work sample together. The companion piece on building the sales hiring scorecard covers how to make the interview side structured.
What does a valid sales work sample look like?
A good work sample is realistic, standardised, and scored. A bad one is a vague "sell me this pen" gotcha that tests improv under pressure more than selling. Here is how to build one that predicts the job rather than the moment.
Mirror the real job, not a party trick. If your reps run discovery calls, make the sample a discovery call. If they present to a buying committee, make it a short presentation. Give the candidate a realistic scenario and brief in advance, the way they would prepare for a real meeting. You are testing the job you are hiring for, not their ability to ambush-sell a stranger a pen.
Standardise it across candidates. Every candidate gets the same scenario, the same brief, the same time, and the same "buyer" playing the same role. Standardisation is what makes the comparison fair and the result meaningful. It is also what keeps the exercise defensible.
Score it with a defined rubric, set before you start. Decide in advance what good looks like: did they ask discovery questions, listen, handle the objection, advance the deal, follow up well? Rate each dimension on a simple scale. Scoring against a fixed rubric is what turns "I liked them" into evidence, and it is the same discipline that makes structured methods predictive.
Use more than one trained rater where you can. Two people scoring independently against the same rubric reduces the pull of a single evaluator's gut feeling, which is exactly the bias a work sample is meant to counter. The companion piece on why hiring on gut feeling is the riskiest move in sales recruiting explains why that matters.
Keep it job-relevant and reasonable in scope. Under the Ontario Human Rights Code, any selection method must be tied to the genuine requirements of the job and must not screen out candidates on protected grounds, and you must be ready to accommodate disability-related needs in the process (Ontario Human Rights Commission, n.d.). A 30 to 60 minute role-play tied to the actual role clears that bar far more comfortably than a long, unpaid "sell our product for a week" assignment, which raises both fairness and legal questions. This is general HR information, not legal advice; confirm your specific exercise with an Ontario employment lawyer.
Respect the candidate's time. The best candidates have options and other processes. A tight, well-run, clearly job-relevant sample respects that. An open-ended free-labour assignment signals the opposite and costs you the people you most want.
The honest limit
A work sample is powerful, not perfect. A candidate can have a bad 40 minutes, and nerves in an artificial exercise are not the same as nerves with a real buyer and a commission on the line. So weight it heavily, but do not make it a single pass-fail gate. Combine it with a structured interview and solid reference checks, and let the whole picture decide. No single method, however predictive, should carry a hire on its own.
In short
A pre-employment sales assessment lets you watch the job instead of listening to a story about it, which is why work samples sit among the strongest predictors of performance in the selection research. Build one that mirrors the real role, standardise it across candidates, score it against a rubric you set in advance, keep it job-relevant and reasonable under the Ontario Human Rights Code, and combine it with a structured interview rather than treating it as a single gate.
Key takeaways
Strong salespeople excel at interviews by design, so an interview alone risks selecting the best interviewer rather than the best seller.
Work samples rank among the strongest predictors of job performance, alongside structured interviews and general mental ability (Schmidt & Hunter, 1998; Sackett et al., 2022).
A valid sales work sample is realistic, standardised across candidates, and scored against a rubric set before you begin.
Keep the exercise job-relevant and reasonable under the Ontario Human Rights Code, and be prepared to accommodate; avoid long unpaid assignments.
Weight the work sample heavily but combine it with a structured interview and references; no single method should carry a hire alone.
Frequently asked questions
What is a sales work sample?
It is a short, job-relevant exercise where a candidate actually performs part of the sales role, such as a discovery call, an objection-handling scenario, or a brief presentation, under standardised conditions that you score against a defined rubric. It measures selling behaviour directly rather than a candidate's description of it.
Are sales assessments legal in Ontario?
Generally yes, provided the assessment is tied to the genuine requirements of the job, does not screen out candidates on protected grounds, and accommodates disability-related needs under the Ontario Human Rights Code. Keep it reasonable in scope and confirm your specific exercise with an Ontario employment lawyer.
How long should a sales work sample take?
Long enough to see the relevant skill and short enough to respect a good candidate's time. A focused 30 to 60 minute role-play or presentation tied to the real role is usually enough, and it is far more defensible than an open-ended multi-day unpaid assignment.
References
Ontario Human Rights Commission. (n.d.). Human rights at work 2008 (third edition): Hiring. https://www.ohrc.on.ca/en/human-rights-work-2008-third-edition
Sackett, P. R., Zhang, C., Berry, C. M., & Lievens, F. (2022). Revisiting meta-analytic estimates of validity in personnel selection: Addressing systematic overcorrection for restriction of range. Journal of Applied Psychology, 107(11), 2040-2068. https://doi.org/10.1037/apl0000994
Schmidt, F. L., & Hunter, J. E. (1998). The validity and utility of selection methods in personnel psychology: Practical and theoretical implications of 85 years of research findings. Psychological Bulletin, 124(2), 262-274. https://doi.org/10.1037/0033-2909.124.2.262
This article is general HR information, not legal advice. Selection methods, their job-relevance, and accommodation obligations in Ontario are governed by the Ontario Human Rights Code and related law. Confirm your specific assessment with an Ontario employment lawyer.
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