401(k) Plans: A Guide for International Companies Expanding to the US

The American retirement system is one of the most distinctive aspects ofUS employment benefits, with 401(k) plans as its cornerstone. For international companies establishing operations in the United States, understanding and implementing these retirement plans represents a significant compliance obligation and a powerful tool for attracting and retaining talent. The 401(k) plan has become virtually synonymous with retirement planning in America, with over 60 million active participants and more than $7 trillion in assets.

Foreign employers entering the US market face unique challenges when navigating the complex landscape of American retirement benefits. The regulatory framework, tax implications, and administrative requirements can seem daunting, especially when overlaid with cross-border considerations. This guide aims to demystify 401(k) plans for international businesses, providing a roadmap for successful implementation while ensuring compliance with US regulations.

What are 401(k) Plans?

A 401(k) plan is a tax-advantaged, defined-contribution retirement account established by employers for their employees. Named after the Internal Revenue Code section that created it, these plans allow employees to contribute a portion of their pre-tax salary to individual accounts. The funds are then invested in a selection of investment options, typically mutual funds, to grow over time and provide income during retirement.

Several variations of 401(k) plans exist, each with distinct features designed to serve different business needs:

• Traditional 401(k) plans offer the most flexibility in design but must pass annual non-discrimination tests to ensure they don’t disproportionately benefit highly compensated employees. Contributions are made with pre-tax dollars, reducing employees’ taxable income for the year of contribution, with taxes deferred until withdrawal during retirement.

• Roth 401(k) options allow after-tax contributions, meaning employees pay taxes on the money before it enters the account. The significant advantage comes at retirement when qualified withdrawals – including all investment gains – are completely tax-free.
• Safe Harbor 401(k) plans require employers to make certain mandatory contributions for employees but are exempt from the complex non-discrimination testing that traditional plans must undergo. This simplifies administration and ensures highly compensated employees can maximize their contributions.

• SIMPLE 401(k) plans are designed for small businesses with fewer than 100 employees. They feature lower contribution limits and more simple administration requirements but mandate employer contributions.

One of 401(k) plans’ most attractive features is the tax advantages. For 2026, employees can contribute up to $24,500 annually, with an additional $8,000 catch-up contribution for those aged 50 or older ($11,250 for those aged 60 to 63). Employer contributions can bring the total annual additions to an employee’s account to $72,000. These contributions create immediate tax savings for employees, allowing investments to grow tax-deferred for decades.

Legal and Compliance Considerations for Foreign Companies

International companies establishing 401(k) plans must navigate a complex regulatory landscape governed primarily by two key frameworks: the Employee Retirement Income Security Act (ERISA) and the Internal Revenue Code.

ERISA establishes full standards for pension plans in private industry, including fiduciary responsibilities, reporting and disclosure requirements, participation and vesting provisions, and funding obligations. The Department of Labor enforces these regulations to protect plan participants and ensure plan administrators act in their best interests. Foreign employers must understand that ERISA imposes significant personal liability on plan fiduciaries – those who exercise discretionary authority over plan management or assets.

The Internal Revenue Service (IRS) oversees the tax aspects of retirement plans, granting them “qualified” status if they meet specific requirements. This qualification is crucial, as it enables tax-deferred growth for employees and tax deductions for employer contributions. To maintain this status, plans must adhere to numerous requirements, including:

• Non-discrimination rules ensuring benefits don’t favor highly compensated employees Coverage requirements mandating the inclusion of a minimum percentage of the workforce Contribution and compensation limits Minimum participation standards Vesting schedules for employer contributions
  
  
• The SECURE 2.0 Act, passed in late 2022, introduced significant changes to retirement plan regulations, including mandatory auto-enrollment for new plans established after December 29, 2022, increased catch-up contribution limits and provisions for emergency savings accounts within 401(k) plans. International companies must stay current with these evolving requirements.
  
  
• Form 5500, an annual report filed jointly with the IRS and Department of Labor, represents another compliance obligation. This full disclosure document details the plan’s financial condition, investments, and operations. Late or incomplete filings can result in substantial penalties.

Setting Up a 401(k) Plan as an International Employer

Establishing a 401(k) plan involves several key steps and decisions. Foreign companies must establish a US legal entity, typically a subsidiary corporation or limited liability company, to sponsor the plan. Alternatively, companies can utilize an Employer of Record (EOR) service like Foothold America, which allows international businesses to hire US employees without establishing their own legal entity. Through our EOR services, foreign companies can offer competitive 401(k) plans to their U.S. workforce while we handle the legal sponsorship, administration, and compliance obligations.

When evaluating providers, international companies should consider several factors: fee structures (administrative fees and investment expenses), investment options, technology platforms, compliance support, and experience working with foreign-owned businesses. Many providers now offer specialized services for international companies, including multi-language support and guidance on cross-border issues.

Plan design decisions represent the next major step. These include:

• Eligibility requirements – determining which employees can participate based on age, service period, and job classification Contribution structure – whether and how much the employer will match employee contributions or make non-elective contributions Vesting schedule – the timeline for employees to gain ownership of the employer contributions Investment options – the range of funds available to participants Loan provisions – whether employees can borrow from their accounts Hardship withdrawal conditions – circumstances under which employees can access funds before retirement
  
  
• For plans established after December 29, 2022, the SECURE 2.0 Act mandates automatic enrollment at a rate of at least 3% of salary, with automatic annual increases of 1% until reaching at least 10% but no more than 15%. While this represents an additional administrative requirement, research shows that auto-enrollment dramatically increases participation rates.
  
  
• The plan must be formalized through a written document outlining all key provisions and procedures. This legal document is the foundation for plan operation and must be carefully drafted to ensure compliance with all applicable regulations. Many providers offer standardized documents that can be customized to meet specific needs.
  
  
• Finally, the plan must be communicated to employees through summary plan descriptions and enrollment materials. Providing these materials in multiple languages for international companies with diverse workforces can improve understanding and participation.

Eligibility of Foreign Nationals and Non-US Residents

The participation of foreign nationals in US 401(k) plans presents unique considerations. Eligibility generally depends on US income tax status rather than citizenship.

US citizens and permanent residents (green card holders) can fully participate in 401(k) plans without special restrictions. Foreign nationals working in the US on temporary US work authorisation are also typically eligible if they receive US source income reported on Form W-2 and are subject to US income taxation. However, their participation may be complicated by time limits on their US stay and uncertainty about long-term US employment.

The situation becomes more complex for non-resident aliens – individuals who aren’t US citizens or permanent residents and don’t meet the substantial presence test. While technically eligible if they have US source income subject to US income tax, their participation raises additional considerations:

• Tax treaties between the US and their home countries may affect taxation of contributions and distributions Withdrawals may be subject to special withholding requirements Investment gains might face taxation in both countries. Future distributions could create tax complications if the individual has returned to their home country

• For employees who split their time between the US and other countries, determining eligibility requires careful analysis of their tax residency status and the source of their compensation. In some cases, employees may be eligible for retirement plans in multiple countries, raising questions about coordinating benefits and potential tax advantages.
  
  

International companies must also consider the implications of controlled group rules, which may require related entities to be treated as a single employer for retirement plan purposes. This can unexpectedly bring foreign employees under US non-discrimination testing requirements.

Challenges and Solutions for Cross-Border Benefits

International companies operating retirement plans in multiple countries face several distinct challenges. The interaction between different retirement systems, tax regimes, and regulatory frameworks creates complexity that purely domestic employers don’t encounter.

One significant challenge involves controlled group testing. US retirement plan rules often require related employers – including foreign affiliates under common control – to be considered together when applying non-discrimination tests. This can create situations where highly compensated employees in the US have their contributions limited due to low participation rates among employees of foreign affiliates who aren’t even eligible for the US plan.

Several strategies can address this issue:

• Establishing a separate plan for the US entity designed to satisfy the Safe Harbor requirements, thus exempting it from non-discrimination testing. Structuring the ownership of the US entity to potentially break controlled group status. Implementing non-qualified deferred compensation arrangements for highly compensated employees who face limitations

• Another common challenge involves employees who transfer between countries. When US employees transfer to foreign affiliates or foreign employees transfer to the US, questions arise about ongoing participation in retirement plans, vesting of benefits, and tax treatment of contributions and distributions.

• Currency fluctuations present another consideration. Exchange rate volatility can affect budget predictability for foreign companies making contributions to US plans. Some companies address this through hedging strategies or establishing US dollar reserves for benefit funding.

• Finally, coordinating a global benefits philosophy across countries requires thoughtful planning. Some international companies strive for relative parity in total retirement benefits across countries, while others adopt a market-by-market approach based on local practices. Either strategy requires careful analysis of the value of benefits in different jurisdictions, accounting for government-provided benefits, tax treatment, and investment options.

Best Practices from Foothold America

Based on our extensive experience helping international companies establish and manage US operations, we’ve developed several best practices for implementing 401(k) plans.

Start Early

Begin planning your retirement benefits strategy at least four months before your US launch. This provides adequate time to evaluate providers, design your plan, and implement necessary administrative systems.

Align with Company Culture

Your 401(k) plan should reflect your global company values while adapting to US norms. If your organization emphasizes employee financial security globally, structure your US retirement benefits accordingly.

Consider Your Growth Trajectory

Design your initial plan with scalability in mind. A plan that works for 10 employees may become administratively burdensome or cost-inefficient as you grow to 100 or more. We recommend building flexibility into early plan documents.

Educate Your Non-US Leadership

Many foreign executives are unfamiliar with defined contribution systems and their fiduciary responsibilities. We provide executive education to ensure your global leadership understands their obligations and the strategic importance of the 401(k) benefit.

Implement Strong Governance

Establish a retirement plan committee with clearly defined roles and documented decision-making processes. This governance structure protects the company and plan fiduciaries while ensuring consistent plan management.

Leverage Technology

Modern 401(k) platforms offer multilingual interfaces, mobile access, and integration with other HR systems. These features can significantly improve the employee experience and reduce administrative burden.

Invest in Financial Education

Many foreign nationals in your US operations may be unfamiliar with self-directed retirement planning. Full financial education programs increase participation rates and improve retirement outcomes.

Conduct Regular Benchmarking

The 401(k) landscape evolves continuously. To ensure ongoing competitiveness, we recommend annual reviews of your plan against industry standards for fees, services, and investment options.

Document Everything

Maintain meticulous records of all plan decisions, participant communications, and compliance activities. This documentation proves invaluable during Department of Labor audits or employee inquiries.

At Foothold America, we guide our clients through these best practices while handling the implementation details. This allows you to focus on your core business while we ensure your retirement benefits support your overall US strategy.

Conclusion

Navigating the complexities of 401(k) plans represents one of many challenges international companies face when expanding into the US market. While retirement benefits form a critical component of American employment packages, they exist within a broader ecosystem of employment practices, regulations, and expectations that foreign employers must understand.

At Foothold America, we help businesses with many areas of US employment, including 401(k) plans, payroll administration, healthcare benefits, employment compliance, HR support, and workforce management. Our full approach ensures international companies can build strong foundations for their American operations while minimizing risk and maximizing competitiveness in US talent markets.

For international companies establishing US operations, we recommend viewing 401(k) implementation as part of a holistic employment strategy. This approach includes aligning retirement benefits with the overall compensation philosophy, integrating them with other benefits offerings, and ensuring they support broader business objectives in the American market.

The success of your US expansion depends on building employment systems that work smoothly together, comply with all applicable regulations, and meet the expectations of American workers. With the right partner guiding your journey, the complexity becomes manageable, and the opportunities become accessible. Foothold America stands ready to provide that partnership, bringing decades of experience helping international businesses establish successful US employment operations.

Disclaimer: This blog is intended for informational purposes only and does not constitute legal, tax, financial, or investment advice. The information provided is general and may not apply to all situations. International companies should consult with qualified professionals, including attorneys, accountants, and benefits consultants, regarding their specific circumstances before implementing a 401(k) plan or making related decisions. Foothold America does not guarantee this information’s completeness, reliability, or accuracy. Tax laws and regulations change frequently and may have changed since the publication of this article. Foothold America is not a law firm, accounting firm, or registered investment advisor.