Founders often ask when their company needs HR infrastructure, as if there is one moment the answer changes. There is not. Federal law adds obligations at specific headcount thresholds. State law adds more, often at lower thresholds, in every state where an employee works. Every new hire in a new state resets part of the calculation.
The federal threshold map
1 employee: federal obligations begin
Wage and hour law applies from the first hire. The Fair Labor Standards Act governs minimum wage, overtime, and exempt versus non-exempt classification. Form I-9 employment eligibility verification is required for every new hire. OSHA safety obligations apply regardless of size.
15 employees: Title VII and the ADA
Title VII prohibits discrimination based on race, color, religion, sex, and national origin. The ADA prohibits disability discrimination and requires reasonable accommodation. From here on, your documentation practices, complaint handling, and investigation protocol are the record the EEOC will look at if a charge is filed.
20 employees: the ADEA
The Age Discrimination in Employment Act protects workers 40 and older. Reductions in force need analysis of whether the selection pattern falls more heavily on workers 40 and older. Under the Older Workers Benefit Protection Act, a release of age claims generally requires 21 days to consider (45 days in a group program) and a 7-day revocation period.
50 employees: FMLA and the ACA
The Family and Medical Leave Act covers private employers with 50 or more employees in 20 or more workweeks. An individual employee is eligible after 12 months and 1,250 hours of service, at a worksite with 50 or more employees within 75 miles. Eligible employees can take up to 12 weeks of unpaid, job-protected leave for qualifying reasons. The ACA employer mandate applies at 50 full-time employees, including full-time equivalents.
100 employees: EEO-1 and the WARN Act
Private employers with 100 or more employees file annual EEO-1 Component 1 demographic reports with the EEOC. The WARN Act generally requires 60 days' written notice before a plant closing or mass layoff. Workforce reductions should build WARN analysis into planning before anything is communicated.
Title VII compensatory and punitive damages are capped by employer size: $50,000 for 15 to 100 employees, $100,000 for 101 to 200, $200,000 for 201 to 500, and $300,000 for more than 500. The caps do not cover back pay or front pay, and they do not apply to most state-law claims. In states without a comparable cap, a jury can award far more.
42 U.S.C. 1981a(b)(3); Pollard v. E.I. du Pont de Nemours (2001)State law: the layer most companies miss
Every state where an employee works brings its own employment law, regardless of where the company is headquartered: new-hire paperwork, required postings, paid sick leave, pay frequency, final pay timing, pay transparency, and the state's anti-discrimination statute, which often applies to much smaller employers than federal law.
A company expanding into a second state can cross several new obligations at once. Remote employees are the most common source of unrecognized multi-state exposure for growing companies.