GTN Mobility Tax Blog

Compensation collection for international assignments comes with many moving parts, and payroll and mobility teams often run into the same core questions. From coordinating global data to navigating split payroll, per diems, and year-end reporting, each step has its own requirements and potential pitfalls.

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.

An offer to take on an international assignment is often seen by employees as both a vote of confidence from their employer and a valuable opportunity for career growth. Though both are true, it’s also important to look beyond the professional benefits and consider the logistical, financial, and regulatory implications involved—particularly around immigration, tax compliance, and compensation across both the Home and Host countries.

The modern workforce is a mobile one and has expanded beyond the traditional short- or long-term assignment. Today, mobility includes a variety of work arrangements such as remote and hybrid work, as well as short-term business travel. This shift has provided greater flexibility in how and where employees work, allowing organizations to access a wider talent pool and operate more efficiently across different locations. However, with increased flexibility comes the challenge of navigating complex reporting and filing requirements to avoid financial, legal, and reputational risks.

On 30 October 2024, Chancelor Rachel Reeves presented the UK budget, which included significant changes to the tax regime for non-domiciled individuals. Specifically, the budget proposed the abolishment of non-domicile status and creation of a new residence-based test known as the Foreign Income and Gains Regime (FIG). As outlined, the new FIG regime will be effective 6 April 2025, greatly impacting the tax situations for individuals moving to or from the UK.

Global mobility programs are a win-win solution for both your company and your mobile employees.

In today’s rapidly evolving global economy, technology has made it easier to work across different time zones and borders. This connectivity allows seamless collaboration with colleagues worldwide. However, it also means that tax and immigration authorities can more effectively monitor and enforce compliance.