Equity income is a key compensation component as organizations seek to attract, motivate, and retain talent. Stock options, restricted stock units, and other equity-based awards are designed to align employee interests with long-term business performance and are increasingly offered to a broad range of roles and geographies.
At the same time, the way (and where) employees work has changed. Remote and hybrid arrangements, short-term business travel, and cross-border assignments mean that equity awards are often no longer easily attributable to a single location. This creates employer and employee challenges.
For mobile employees, equity income can create complex tax, payroll, and reporting obligations that span multiple states and countries, often over several years between the grant, vest, and exercise.
This results in compliance risks for employers if mobility is not tracked and managed carefully. Reporting and withholding obligations may arise in jurisdictions where an employee worked months or years earlier, and issues often only arise when awards vest or are exercised. In many jurisdictions, tax authorities expect employers to have contemporaneous support for equity sourcing methodologies, increasing the importance of integrated mobility and equity tracking systems.
Understanding these risks is critical to preserving the value of an equity program and avoiding unexpected tax exposure, potential penalties, and employee dissatisfaction.
Below we outline income tax, legal, and regulatory considerations for companies providing equity income to mobile employees, with a focus on global and US compliance challenges. By understanding how mobility affects equity taxation and administration, employers can take a proactive approach to managing risk while supporting effective compensation strategies.
Mobile employees create unique global and domestic payroll challenges for employers when they are eligible for equity-based compensation. Equity awards often vest or are exercised over several years, during which time employees may work across several jurisdictions. As a result, employers may be required to report and withhold taxes in more than one jurisdiction for a single equity transaction.
From an employer perspective, payroll reporting obligations are impacted by:
These requirements can create significant compliance risk if work locations are not tracked accurately or if payroll systems are not equipped to handle multi‑jurisdictional reporting and withholding. In many cases, reporting obligations arise in jurisdictions where the employee no longer works, increasing the likelihood of inaccurate reporting.
Similarly, the employee may be required to report income to the various jurisdictions in which they have worked on their annual income tax returns. Reporting may be based on residency status or the location of workdays during the earnings period for the equity award.
A misalignment between the employer payroll reporting and employee tax return filings can potentially result in tax notices, audits, penalties, and employee dissatisfaction. Clear processes and communication around income tax reporting and withholding responsibilities are essential to managing risk for both the employer and the employee.
Equity compensation plans are often designed based primarily on a single Home country tax framework. However, employee mobility can trigger tax, payroll, and reporting obligations for both employers and employees across multiple jurisdictions. Furthermore, US-based equity compensation plans often face inconsistent tax treatment in other countries, which can unintentionally reduce the incentive value of awards. Accordingly, it is critical for companies to take a global approach to managing equity programs and assessing how mobility impacts reporting, withholding, and compliance obligations worldwide.
Common global equity-related tax and payroll challenges include:
To manage these risks, employers should review their equity plans and assess how local tax, payroll, and social security rules apply to mobile participants on a country-by-country basis. Employee communications should clearly outline both employer and employee responsibilities for reporting and withholding, especially in cases where equity income may be taxable in multiple jurisdictions or subject to different timing rules.
Employee relocations or employees working across multiple states can create compliance burdens. Employers may need to report and withhold state individual income tax for the employee’s resident state and any nonresident state(s) where income is earned, depending on applicable state rules, reciprocity agreements, and sourcing requirements. This requires accurate tracking of tax residency and work locations.
Companies must understand both the technical state tax laws and the practical payroll implications. For example, many companies may have challenges with reporting income to multiple states and may need to evaluate whether payroll system enhancements are necessary to manage nonresident state reporting and withholding requirements.
For both global and US domestic tax purposes, employers should communicate their reporting and withholding practices to their company-sponsored mobility tax provider. It is also important to recognize that employer payroll obligations and employee income tax return reporting may not always be aligned. This can create potential mismatches between employer reporting and employee tax filings if mobility and work location data are not coordinated carefully. Communication can help minimize risk and avoid surprises for both employers and employees.
For example, New York presents significant challenges due to employer payroll reporting and complex nonresident sourcing rules, which require employees to track and report New York workdays on their nonresident New York tax returns.
Tax authorities have increased focus on high-income individuals with significant equity compensation, as their workdays in nonresident states may result in tax liabilities during the applicable sourcing or vesting period.
Additionally, continued legislative discussion around mobile workforce withholding (e.g., proposed federal simplification efforts) underscores how challenging current compliance is for employers under existing rules.
Mobility professionals should work closely with payroll and stock administration teams to:
Companies should consult legal counsel if they have, or plan to have, global participants in their stock plans. Potential legal considerations include:
The above is not an exhaustive list but provides a foundation for discussions with legal counsel.
As stock-based compensation grows in popularity, global authorities are increasingly focused on compliance. Withholding and reporting practices, especially for mobile employees, are under greater scrutiny, creating challenges for employers with global and multi-state workforces.
Recent legislative and regulatory developments reflect heightened scrutiny and growing complexity in employer withholding and reporting obligations for mobile employees.
These developments underscore the growing expectation that employers maintain accurate mobility tracking, payroll processes, and supporting data to ensure compliance across jurisdictions.
It is important for companies to understand their obligations and collaborate with internal mobility, payroll, and stock teams, and external vendors to establish clear policies and processes for global equity programs. Proactively addressing these requirements helps manage risk, maintain compliance, and preserve the incentive value of equity awards while supporting compensation packages that attract, motivate, and retain top talent.
As workforce mobility continues to evolve, organizations should regularly review their equity processes, so that they remain compliant, scalable, and aligned with the business’s objectives. Managing equity compliance helps companies to manage risk while continuing to use equity compensation as an effective tool to attract, motivate, and retain top talent.
If your company needs support managing equity plans, our team is ready to help. Schedule a call to discuss your needs.
The information provided in this article is for general guidance only and should not be utilized in lieu of obtaining professional tax and/or legal advice.