Writing Job Descriptions That Recruit and Hold Up Legally

Job descriptions rarely get much attention. They are often copied from an old posting, padded with generic requirements and forgotten once the role is filled. That is a missed opportunity, because a single document serves at least three purposes. It attracts candidates, it sets expectations for the person hired, and it becomes evidence when legal questions arise.

The legal role of a job description

Under the Americans with Disabilities Act, employers must provide reasonable accommodations to qualified individuals with disabilities who can perform the essential functions of a job. Whether a task is essential often decides whether an employer must accommodate a limitation or can treat it as disqualifying.

The EEOC's regulations list several kinds of evidence for determining essential functions. One of them is a written job description prepared before advertising or interviewing applicants. Others include the employer's judgment, the amount of time spent on the function, the consequences of not performing it and the experience of people who have held the job.

A description written in advance, and kept current, carries real weight. A description written after a dispute begins, or one that lists every possible task as essential, carries much less.

Job descriptions also matter for wage and hour law. Exempt status under the Fair Labor Standards Act depends on actual duties, and a clear description helps show that a role meets the executive, administrative or professional tests. We cover those tests in our overtime threshold guide.

In states with pay transparency laws, a posting must also include a pay range. Sixteen states plus Washington, D.C. had statewide disclosure laws in effect by August 2026, as explained in our pay transparency guide.

Separating essential from marginal

The most useful step is to separate essential functions from marginal ones. Essential functions are the fundamental duties the position exists to perform. Marginal functions are tasks the person may occasionally do but that could be reassigned.

Ask a few questions about each task. Does the position exist to perform this function? How many other employees could perform it? How much time does it take? What happens if it does not get done? Is specialized skill required? A forklift operator's essential function is operating a forklift safely. Occasionally covering the front desk is probably marginal.

Physical requirements deserve the same care. Lifting 50 pounds may be essential for a warehouse loader and irrelevant for an office coordinator. Listing it for every role creates problems in accommodation decisions and can discourage qualified candidates from applying.

Writing for candidates

The recruiting purpose is where most descriptions fall short. Candidates want to know what they will do on a typical day, who they will work with, what the schedule looks like, what the job pays and how they could grow. Long lists of adjectives and inflated requirements do not answer those questions.

Requirements deserve scrutiny. Many postings demand degrees or years of experience that the job does not truly require. Those barriers shrink the applicant pool, especially among workers returning to the labor force, which we cover in our report on workers on the sidelines. Ask whether each requirement is needed on day one or could be learned on the job.

Plain language helps. Write in second person, describe the work concretely and avoid internal jargon. A description that reads like a real conversation about the job attracts candidates who understand what they are signing up for, which also reduces early turnover.

Pay belongs in the posting even where the law does not require it. Many candidates skip listings without a range, and a posted range saves recruiters from screening applicants whose expectations are far from the budget. It also signals that the employer has thought carefully about what the role is worth.

Keeping descriptions current

Jobs change. New technology, reorganizations and growth all shift what people actually do. Review job descriptions at least once a year and whenever a role changes significantly. Ask current employees and managers to confirm the essential functions and time estimates.

Store approved descriptions in a central place and use them as the starting point for every posting, interview plan and performance review. A consistent foundation makes hiring faster and evaluations fairer. Our guide to structured interviews shows how to build interview questions directly from the essential functions.

A well-written description is one of the cheapest tools an HR team has. It recruits, it clarifies and it protects, as long as someone keeps it accurate.