Key US Employment Laws Explained
Four federal statutes do most of the day-to-day work in US employment law: the Fair Labor Standards Act (FLSA), the Age Discrimination in Employment Act (ADEA), the Americans with Disabilities Act (ADA), and the Uniformed Services Employment and Reemployment Rights Act (USERRA). Between them they set the floor on pay and hours, forbid several categories of discrimination, and require employers to hold jobs open for people serving in the military. Every HR team in the US needs a working knowledge of what each one requires. Most compliance failures come from misunderstanding one specific test inside one specific law, not from wholesale ignorance.
This guide is written for HR generalists, hiring managers, and small-business owners who want a plain-English rundown of what each of the four statutes says, who it covers, and where the traps are. It is not legal advice; for anything nonstandard, consult an employment attorney licensed in your state.
FLSA meaning and the exempt employee question
The Fair Labor Standards Act of 1938 establishes the federal minimum wage, the 40-hour standard workweek, overtime at 1.5x for hours worked over 40 by non-exempt employees, and standards for youth employment. It is enforced by the Department of Labor's Wage and Hour Division, and it is the source of most of the wage-and-hour litigation US employers face.
The single most consequential concept in the FLSA is the exempt / non-exempt distinction. Non-exempt employees are entitled to minimum wage and overtime; exempt employees are not. To be legally exempt, a worker must meet all three tests: a salary basis test (paid a predetermined salary, not by the hour), a salary level test (currently paid above a threshold the DOL sets and periodically updates), and a duties test (their primary duties fit one of the exemption categories, most commonly executive, administrative, professional, computer, or outside sales).
The job title on someone's business card is irrelevant to exempt status. A "manager" who spends 90 percent of their time on the register is a non-exempt employee, no matter what payroll thinks. Misclassification is a common finding in DOL audits and carries back-pay liability plus penalties.
State law often adds requirements on top of the FLSA. California's daily overtime rule, New York's higher salary threshold, and multiple states' meal-and-rest-break rules are all layered on the federal floor. When there is a conflict, the rule more favourable to the employee applies.
The Age Discrimination in Employment Act (ADEA)
The Age Discrimination in Employment Act of 1967 prohibits discrimination in employment against people aged 40 and older. It applies to private employers with 20 or more employees, state and local governments, employment agencies, and labour unions. It covers every stage of the employment relationship: hiring, promotion, compensation, benefits, layoffs, and termination.
Two commonly-missed features. First, the ADEA protects people 40 and above from discrimination in favour of younger workers, but it does not protect younger workers from discrimination in favour of older ones. Second, mandatory retirement is unlawful for most jobs, though the statute carves out a narrow exception for bona fide executives above certain compensation thresholds.
The specific hiring practice the ADEA most often catches is language in job postings that requires "digital natives," "recent graduates," or a maximum experience cap. Any of these can be evidence of age-based intent. Neutral language that focuses on skills is safer.
The Americans with Disabilities Act (ADA)
The Americans with Disabilities Act of 1990, amended in 2008, prohibits discrimination against qualified individuals with disabilities in employment (Title I), state and local government services (Title II), and public accommodations (Title III). For HR, Title I is the operative section. It applies to employers of 15 or more employees.
The ADA requires two things of covered employers. First, do not discriminate against a qualified individual with a disability in any employment action. Second, provide reasonable accommodations that enable a qualified individual with a disability to perform the essential functions of the job, unless doing so would impose an undue hardship on the business.
"Reasonable accommodation" is intentionally broad. Common examples include making facilities accessible, restructuring a job to remove marginal (non-essential) tasks, allowing flexible scheduling, providing assistive technology or a screen reader, or granting extended leave beyond what other employees receive.
Two frequent employer errors. The first is treating the accommodation request as a bureaucratic form-filling exercise rather than an interactive conversation, which is what the EEOC's guidance requires. The second is applying a blanket policy (for example, a fixed limit on leave) without considering whether extending it in a specific case would be a reasonable accommodation.
USERRA and military service
The Uniformed Services Employment and Reemployment Rights Act protects the civilian employment rights of members of the US military, including active duty, reservists, and National Guard members. It requires most employers, of any size, to reemploy service members returning from qualifying military service, with the seniority, status, and pay they would have earned had they never left, subject to certain conditions.
The mechanics: the employee must give advance notice of service (with limited exceptions for emergencies), the cumulative period of service must be five years or less with the same employer, and the employee must apply for reemployment within a specific window after service ends (which varies by the length of the service period).
USERRA also protects against discrimination in hiring, promotion, and termination based on military service, and requires employers to continue health insurance for up to 24 months during service.
Most HR errors on USERRA are procedural: failing to reinstate to the correct position, calculating seniority incorrectly, or forgetting that the protection extends beyond active-duty deployment to include training obligations for reservists.
| Law | What it does | Employers covered |
|---|---|---|
| FLSA | Minimum wage, overtime, hours, youth work | Nearly all employers |
| ADEA | Prohibits age discrimination (40+) | 20+ employees |
| ADA | Prohibits disability discrimination; requires reasonable accommodation | 15+ employees |
| USERRA | Reemployment rights for military service | Nearly all employers |
Where these laws touch hiring specifically
Every one of these four statutes touches the hiring process. The FLSA affects how you post the role (advertising the correct pay rate) and how you classify the resulting hire. The ADEA affects the language of the job description. The ADA affects whether your online application, video interview platform, and pre-employment tests are accessible to candidates with disabilities. USERRA affects how you treat a returning service member applying for a position, and it affects how you word any "must be available continuously" requirement in a posting.
For a compliant hiring process, the hard part is consistency. Every candidate for a role should get the same interview format, the same questions, and the same scoring criteria; every accommodation request should get the same interactive process. Inconsistency is where discrimination claims tend to have the most legs, because a plaintiff can point at another candidate who was treated differently.
Fabric runs Round 1 interviews with that consistency built in. Every candidate for a given role gets the same role-specific format, scored against the same rubric, with cheating detection built in as a core part of the product, not an add-on. The recruiter or panel then reviews the output and makes the final call. Fabric does not decide who is hired.
*Fabric's technical-depth and eligibility scoring is designed to flag mismatches and surface them to your recruiter. It's a signal for your team to weigh, not an automatic reject.* Accessibility is a design requirement, not an afterthought, and any candidate accommodation request should still be handled by your HR team through your standard ADA process.
Related posts
- Exempt vs. non-exempt employees
- Labor law compliance
- Hostile work environment and whistleblower protections
- Non-compete, arbitration, and collective bargaining
- I-9 vs. W-4 payroll forms
FAQ
What does FLSA mean?
FLSA stands for the Fair Labor Standards Act, the 1938 federal law that establishes the US minimum wage, the 40-hour workweek, overtime pay rules for non-exempt employees, and youth employment standards. It is enforced by the Department of Labor's Wage and Hour Division.
What is an exempt employee?
An exempt employee is one whose job meets the FLSA's tests for being exempt from federal overtime and minimum wage rules, typically because they are paid a salary above a defined threshold and perform executive, administrative, professional, computer, or outside sales duties. Exempt status is about the job, not the title.
What is the difference between exempt and non-exempt?
Non-exempt employees must be paid at least the federal minimum wage and receive overtime for hours worked over 40 per week; exempt employees are paid a salary and do not receive overtime. Misclassifying a non-exempt worker as exempt is one of the most common wage-and-hour violations.
What is the Age Discrimination in Employment Act?
The Age Discrimination in Employment Act (ADEA) of 1967 prohibits employment discrimination against people aged 40 and older by employers with 20 or more employees. It covers hiring, promotion, discharge, compensation, and terms and conditions of employment.
What does the ADA require of employers?
The Americans with Disabilities Act requires employers of 15 or more employees to provide reasonable accommodations to qualified individuals with disabilities, unless doing so would cause undue hardship. It also prohibits discrimination on the basis of disability in hiring, firing, and all other employment terms.
What is USERRA?
The Uniformed Services Employment and Reemployment Rights Act (USERRA) is a federal law that protects the civilian employment rights of members of the US military. It requires most employers to reemploy service members returning from qualifying military service, with the same seniority, status, and pay they would have had if they had never left.