The short answer
A work sample test is a hiring assessment in which candidates perform a task, or a short set of tasks, that mirrors real work from the job, and are scored on the quality of the output or the way they did it. Examples include writing a customer reply, reconciling a small ledger, or fixing a bug in a sample codebase. It matters in hiring because it measures what candidates can actually do, rather than what they say they can do.
Work sample test explained
The US Office of Personnel Management (OPM) gives a plain example: candidates for an administrative assistant job might be asked to transcribe an internal memo or file a stack of paperwork accurately. Good work samples copy the real work environment as closely as is practical, use the same tools, and are scored either by trained assessors who watch the candidate or by measuring the outcome (for example, the number of errors).
A close cousin is the broader performance exercise, such as a role-play with a trained actor playing an upset customer, which tests problem solving and communication in one go. OPM also notes a key limit: use work samples only when candidates are expected to have the skill on day one. If you will train new hires on the task, testing it up front doesn't make sense.
Example work samples by role
What the research says
OPM reports that work samples have a high degree of content validity, that performance on them relates highly to job performance, and that applicants often see them as very fair. It also reports that generally little or no performance difference is found between men and women or applicants of different races, though that depends on the competencies being assessed. The trade-off is cost: work samples can be expensive to build, may need updating as tools change, and take time to administer and score.
Common mistakes
- Unpaid mini-projects. Keep a work sample to an hour or two. Multi-day take-homes cost candidates a lot and favor people with free time.
- No scoring key. Write down what a strong output looks like before anyone takes the test.
- Testing trainable skills. Test only what the person must do well from the start.
For technical roles, compare coding assessment tools, or see the ready-made Python skills test for an example of what to measure at each level.
Related terms
- Pre-employment assessment: the wider family of hiring tests.
- Technical screen: an early check of core technical skills.
- Situational judgment test: a low-fidelity alternative: judge the task, don't do it.
- Interview rubric: anchors you can reuse to score work samples.
- Cognitive ability test: measures general reasoning rather than job tasks.
Questions
How long should a work sample test take?
Aim for 30 minutes to 2 hours. Shorter tasks get higher completion rates, and a well-chosen task shows most of what you need in that time.
Should candidates be paid for a work sample?
For anything longer than a couple of hours, many employers pay or offer a stipend. Short, focused tasks usually don't need payment.
What is the difference between a work sample and a job knowledge test?
A job knowledge test asks what a candidate knows, usually in multiple choice. A work sample has them do the task, so you see the skill in action.
Want to pair a work sample with a live technical conversation? Book a 20-minute demo.
