A European technology company opens its first US office through a Delaware LLC structure in the United States and hires a small sales team. Within six months, the company faces a wrongful termination claim, a wage dispute. Additionally. A demand to reclassify independent contractors as employees. each arising from employment rules that differ sharply from anything in its home legal system. The cost of resolving these issues exceeds the entire first-year payroll budget.
Employment law in the United States operates across two parallel regulatory layers: federal legislation that sets a nationwide floor, and state-level employment legislation that frequently imposes stricter obligations on employers. International businesses must comply with both layers simultaneously, and the gap between them can be substantial. An employment contract that satisfies federal requirements may still expose an employer to liability under California, New York, or Massachusetts law.
This page explains the key instruments, procedures. Additionally, pitfalls of US employment law for international business clients. covering termination, collective agreements. Social security obligations, dispute resolution through JAMS and AAA arbitration. Additionally, the cross-border dimensions that arise when US operations connect to Brazil or the European Union.
The regulatory landscape: federal floors and state ceilings
US employment legislation does not follow a single unified code. Federal employment law establishes minimum standards for wages, working time, anti-discrimination protections, family leave, and workplace safety. State employment legislation then adds its own obligations – sometimes far more onerous – for businesses operating in that state.
The at-will employment doctrine is the foundation of the US system. Under US employment legislation, an employer may generally terminate an employee at any time, for any reason or no reason, unless a specific exception applies. Those exceptions are significant. They include terminations that violate anti-discrimination legislation, those that breach an express or implied employment contract, and those that fall within public policy protections recognised by courts in a growing number of states.
International clients from civil law systems – particularly those accustomed to French, German, or Brazilian labour law – consistently underestimate how much protective legislation exists alongside at-will doctrine. Federal law prohibits discrimination based on race, sex, national origin, age, disability, religion, and other protected characteristics. State legislation frequently extends that list. Pregnancy accommodation rules, pay transparency requirements, and predictive scheduling laws now apply in many major business states. An employer that relies on at-will doctrine without understanding these overlaying protections exposes itself to significant liability.
Worker classification is a related pressure point. The federal and state rules for distinguishing an employee from an independent contractor differ substantially across jurisdictions. Several states – notably California – apply a multi-factor test that is far more restrictive than the federal standard. A business that classifies workers as contractors under federal employment legislation may still face misclassification claims under state law, triggering liability for back wages, social security contributions, and civil penalties.
Key instruments: employment contracts, termination procedures, and collective agreements
The employment contract in the United States is not always a written document. In at-will states, the employment relationship may arise informally. Employers should nonetheless use written employment contracts or offer letters that clearly define compensation, classification, at-will status, arbitration provisions, and restrictive covenants. A poorly drafted offer letter that implies duration of employment can inadvertently override at-will status – a non-obvious risk that generates litigation frequently.
Restrictive covenants – including non-compete, non-solicitation, and confidentiality agreements – are governed primarily by state law. Enforceability varies widely. Courts in California generally refuse to enforce non-compete clauses. Courts in New York and Delaware apply a reasonableness standard that examines duration, geographic scope, and the employer's legitimate business interest. The Federal Trade Commission has moved to restrict non-competes at a federal level, and that regulatory direction continues to develop. Employers must therefore tailor restrictive covenants to the governing state – not apply a single template across all US locations.
The dismissal notice and termination procedure for individual employees depend on whether an employment contract, a collective agreement, or statute requires advance notice. Under federal employment legislation, the Worker Adjustment and Retraining Notification rules require employers of a certain size to provide substantial advance notice before mass layoffs or plant closings. Many states impose additional or earlier-triggering notice requirements. Failing to comply with notice obligations exposes the employer to liability for wages and benefits for the full notice period.
Collective agreements govern employment conditions where a workforce has chosen union representation under federal labour legislation. The National Labor Relations Act framework protects employees' rights to organise, bargain collectively, and engage in concerted activity. Employers must bargain in good faith over wages, hours, and terms of employment. Unilateral changes to working conditions covered by a collective agreement – even if commercially sensible from the employer's perspective – constitute unfair labour practices and invite federal labour board intervention. International companies unaccustomed to US labour relations should map union exposure at the outset of any US market entry.
Wage and hour compliance is a persistent source of class-action litigation in the United States. Federal employment legislation sets minimum wage and overtime standards. State legislation frequently sets higher floors. Misclassification of exempt and non-exempt employees – or failure to pay overtime correctly – gives rise to collective and class actions that can involve dozens or hundreds of employees. The economics of these claims are asymmetric: the cost of defence and settlement typically exceeds the underlying wage dispute by a significant multiple.
For a detailed walkthrough of the entity formation decisions that precede employment in the United States, see our guide to company formation in the United States.
To receive an expert assessment of your employment structure and termination procedures in the United States, contact us at info@ferrazwhitmore.com.
Practical insights: what international employers consistently misread
The most common error made by international employers entering the US market is treating the employment relationship as a single federal matter. It is not. A company with offices in New York, Texas, and California is operating under three distinct sets of state employment rules simultaneously – covering termination protections, paid leave, anti-harassment training obligations, and salary history restrictions.
Paid leave is a telling example. Federal employment legislation does not require paid sick leave. However, a growing number of states and municipalities mandate it. An international employer that rolls out a uniform leave policy from its home country may fail to meet local obligations in some US locations and offer excess benefits in others. Both outcomes carry risk – legal non-compliance in one direction, and unintended precedent or equity claims in the other.
Anti-discrimination compliance carries obligations that go beyond avoiding discriminatory decisions. Employers of a certain size must file annual workforce data reports with the Equal Employment Opportunity Commission. Businesses that are federal contractors face additional affirmative action obligations. Missing a reporting deadline or failing to maintain the required documentation does not require a discriminatory act to trigger enforcement action – the procedural failure alone is sufficient.
Arbitration clauses in employment contracts are widely used to channel disputes away from the court system. The enforceability of mandatory arbitration in employment matters has been affirmed by the US Supreme Court in several decisions. However, arbitration clauses that cover sexual harassment and sexual assault claims are now restricted by federal legislation. State legislation continues to develop restrictions in this area as well. An arbitration clause drafted three years ago may no longer be fully enforceable today.
Social security obligations in the United States are shared between employer and employee. Employers must withhold and remit federal payroll taxes covering retirement, disability, and health insurance contributions for employees over a certain earnings threshold. International businesses sometimes overlook the interaction between US social security obligations and the social security treaties – known as totalisation agreements – that the United States maintains with a number of countries. These agreements can prevent double contribution obligations for employees seconded from abroad, but they require affirmative steps to invoke.
Practitioners experienced in US employment litigation note that the period between an employee's departure and the filing of a discrimination or wrongful termination charge is often longer than employers expect. Federal employment legislation allows a charge to be filed with the Equal Employment Opportunity Commission within several months of the alleged violation. The charge filing is a prerequisite to bringing a lawsuit in federal court – including the US District Court. Employers who do not preserve documentation from the time of the employment decision often find themselves unable to reconstruct their reasoning years later.
Cross-border considerations: Brazil, EU employees, and international workforce strategy
International companies operating US employment structures alongside operations in Brazil or EU member states face a specific category of cross-border complexity. The interaction of US employment law with foreign mandatory rules – particularly those governing termination, social insurance, and data privacy – requires deliberate structuring.
Brazilian employees seconded to the United States remain subject to Brazilian labour legislation in important respects. Brazilian employment legislation imposes mandatory severance fund contributions, statutory notice periods, and reinstatement rights that cannot be waived by contract. A secondment arrangement that is governed by US at-will doctrine in its written form may still trigger Brazilian statutory entitlements upon termination if the employment relationship is characterised as Brazilian in substance. Businesses managing cross-border secondments between Brazil and the United States should review both legal systems simultaneously. The firm's analysis of employment law in Brazil provides a detailed account of those obligations.
EU-based employees assigned to the United States bring different complications. EU data protection legislation – specifically the rules governing the transfer of personal data to third countries – applies to employee data processed in the United States. An employer that transfers HR records, payroll data, or performance evaluations from an EU entity to a US parent must have a valid legal basis under EU data protection law for that transfer. The contractual mechanisms used to legitimise those transfers have been subject to legal challenge and regulatory adjustment in recent years, requiring ongoing monitoring.
EU employees seconded to the United States may also retain rights under their home-country employment legislation that are mandatory regardless of choice-of-law clauses. Termination of a long-tenured EU employee based in the United States may give rise to claims in the employee's home jurisdiction if the employment relationship retains a sufficient connection to that jurisdiction. The choice-of-law and forum selection provisions in the employment contract matter, but they do not override mandatory protective legislation in the employee's home state.
For employers using equity compensation – stock options or restricted stock units – cross-border compliance adds further layers. SEC registration exemptions, tax withholding obligations in both jurisdictions, and the interaction of US securities legislation with the employee's home-country tax and social security rules must each be addressed before grants are made.
Dispute resolution is another cross-border decision point. JAMS and AAA arbitration are the dominant private arbitration institutions for US employment disputes. Both offer specialist employment arbitration rules. Arbitration awards in the United States can be confirmed in federal court and, where applicable treaties exist, may be enforceable abroad. However, the enforcement of US arbitration awards in Brazil or EU jurisdictions is not automatic – it requires local recognition proceedings that introduce cost, time, and uncertainty.
For a tailored cross-border employment strategy covering your US, Brazilian, or EU operations, reach out to info@ferrazwhitmore.com.
Self-assessment checklist before structuring US employment
The following checklist is designed for international businesses entering the US market or reviewing existing US employment arrangements. US employment law in this context applies where the business employs or intends to employ individuals in the United States. Engages contractors who may be at risk of reclassification. Alternatively, manages cross-border workforce arrangements with a US dimension.
Before commencing US employment activity, verify the following:
- The state or states in which employees will be based – not just the state of entity formation – because employment obligations are governed by the state of work, not the state of incorporation
- Worker classification for each category of worker – the federal standard and the applicable state standard, which may differ substantially
- Whether any portion of the workforce is unionised or subject to a collective agreement, or whether union organising is underway
- Whether restrictive covenants in offer letters or employment contracts are enforceable in the relevant state – including the current status of non-compete enforceability in that jurisdiction
- Whether the business's size triggers specific federal obligations – including anti-discrimination reporting, family and medical leave coverage, and mass layoff notice requirements
This approach is applicable if one or more of the following conditions is met:
- The business employs US-resident individuals, regardless of the nationality of the employing entity
- The business engages contractors in the United States on a regular or ongoing basis
- A secondment arrangement involves an employee who is a national of, or whose employment originated in, Brazil, an EU member state, or another jurisdiction with mandatory employment protections
- The business is considering a reduction in force, restructuring, or change to compensation arrangements affecting US-based employees
Trigger points for escalating to specialist counsel:
- Any employment termination where the employee has filed, or has indicated an intention to file, a charge with the Equal Employment Opportunity Commission
- Any reclassification of a worker from contractor to employee status, or the reverse
- Any collective bargaining demand or union recognition request
- Any secondment arrangement that spans the United States and a jurisdiction with mandatory employment legislation, including Brazil or EU member states
Frequently asked questions
- How long does a dismissed employee have to bring a claim against a US employer?
- The timeline depends on the type of claim and the applicable jurisdiction. For federal anti-discrimination claims, the employee must file a charge with the Equal Employment Opportunity Commission within a defined period – typically 180 or 300 days – before proceeding to a US District Court. Wage and hour claims under federal employment legislation carry a separate limitations period, and state claims may have longer windows. Employers should treat documentation from the time of the employment decision as litigation-critical from the outset, not only after a claim is filed.
- Does a US employment contract need to provide a notice period before termination?
- Not by default. The at-will doctrine means that, in the absence of a contractual obligation or statutory requirement, neither party must provide advance notice before terminating the employment relationship. In practice, many employers include notice provisions in employment contracts for senior employees or in jurisdictions where statutory requirements apply. The Worker Adjustment and Retraining Notification rules impose mandatory advance notice in mass layoff situations. State legislation in several jurisdictions adds further notice requirements. Engaging a lawyer in the United States with experience in multi-state employment compliance is the most reliable way to map the applicable obligations before they arise.
- Can a US employment arbitration clause cover disputes with employees based in EU countries?
- A US-law arbitration clause can be included in an employment contract with an EU-based employee, but its enforceability depends on the mandatory employment laws of the employee's home jurisdiction. Many EU member states restrict or prohibit mandatory pre-dispute arbitration for individual employment claims, treating such clauses as unenforceable against the employee. Even where arbitration is permissible, EU data protection rules and procedural rights may affect how the process unfolds. A law firm in the United States advising on cross-border employment should coordinate with counsel in the relevant EU jurisdiction before relying on a US arbitration clause for an EU-based workforce.
About Ferraz & Whitmore
Ferraz & Whitmore is an international law firm based in Lisbon, advising business clients across 46 jurisdictions. Our employment law practice supports international employers managing US workforce arrangements, cross-border secondments, and multi-state compliance across all major US business states. We combine English common law expertise with deep familiarity with civil law employment systems in Brazil, Portugal. Additionally. EU member states. enabling us to identify the gaps that arise when a US employment structure interacts with mandatory rules from another legal system. Our attorneys have advised on employment contract design, termination procedures, collective agreement compliance, and dispute resolution through JAMS and AAA arbitration for multinational clients entering or restructuring US operations. As an international law firm working across the Americas and Europe, we support in-house legal teams and management-side clients who need employment counsel that spans more than one legal tradition. To discuss your US employment structure or a specific workforce challenge, contact us at info@ferrazwhitmore.com.
Disclaimer: This publication is provided for informational purposes only and does not constitute legal advice. The information herein should not be relied upon as a substitute for professional legal counsel tailored to your specific circumstances. Ferraz & Whitmore assumes no liability for actions taken or not taken based on the contents of this material. For advice regarding your particular situation, please contact info@ferrazwhitmore.com.