GTN Mobility Tax Blog

Global mobility is constantly evolving, and HR and mobility leaders often find themselves balancing competing priorities all at once. Tax compliance, payroll coordination, executive travel, equity issues, and remote work oversight all demand attention. And each comes with its own layer of complexity. Amid all the chaos, certain questions consistently rise to the surface as teams look for clarity, alignment, and practical direction.

In this article, we’ve highlighted the top 10 questions HR and mobility professionals asked most often in 2025, along with clear explanations and resources to help guide your planning for the year ahead.

Whether you manage business travelers, short-term international employees, or remote workers, you have no doubt heard about the "183-day rule."

This commonly referenced rule is part of many international income tax treaties and generally states that an individual may be exempt from income tax in a Host country if they are present in that country for fewer than 183 days within a defined period – often a calendar year or rolling 12-month period. However, this threshold is just one of several conditions that must be met for the exemption to apply.

Globally, many tax jurisdictions expect an employer (as well as the employee) to track and report business travel outside of their Home location. However, simply applying a “183-day” threshold does not always work to ensure tax compliance. On that basis we will take a deeper dive into the impact of income tax treaties on the tax cost of business travel, short-term assignments, and remote work scenarios.