Global Mobility

Global mobility is the program an employer uses to move existing employees across borders for work. It covers the policies, budgets, approvals and vendors behind every international assignment, transfer or rotation.

Think of it as the umbrella: HR sets the rules and each assignment follows them.

How Does a Global Mobility Program Work?

A program turns one-off moves into a repeatable process. A manager requests an assignment, the business case is approved, and the employee moves under a written policy.

Without one, costs drift and two people in the same role may receive very different packages.

Global mobility is different from international hiring. Mobility moves people you already employ, while our guide on how to hire international employees covers recruiting new staff abroad.

What Types of Assignments Does a Mobility Program Cover?

Most programs define a few assignment types and attach a package to each. Terms vary by employer, but these six appear most often.

Match the type to the business need. Overlong packages waste money, and underbuilt ones cause tax and retention problems.

Who Owns Global Mobility Inside a Company?

In most mid-market companies, HR owns the program and coordinates everyone else. No single function can run it alone.

• HR sets policy, approves packages and supports employees and families.
• Tax reviews each move for personal and corporate tax exposure.
• Legal handles work authorization, contracts and local employment law.
• Finance sets budgets and tracks the total cost of each assignment.
• The business sponsors the assignment and defines what it must deliver.

Name one accountable owner. Shared ownership without a lead leaves gaps.

What Are the Main Cost and Compliance Levers?

Tax drives much of the cost. A U.S. citizen working abroad may use the foreign earned income exclusion, which requires a tax home in a foreign country and either bona fide residence or 330 full days abroad in a 12-month period.

The IRS also notes that the foreign tax credit generally cannot be claimed on income you exclude. Tax Equalization and Shadow Payroll, covered in their own entries, manage who bears these costs and how payroll reports them.

Relocation benefits are another lever. Under IRS Publication 15-B, the exclusion for moving expense reimbursements is permanently eliminated, except for active-duty military and certain intelligence community employees. Most employer-paid moves are therefore taxable wages.

Social Security is the third lever. A totalization agreement can prevent paying into two systems. Ongoing duties such as global payroll compliance also sit here.

How Do You Build a Global Mobility Policy?

Start with the business reasons people move, then work down to the details. These steps keep the policy usable:

• Define each assignment type, its length and who qualifies.
• Set an approval path with a written business case and a cost estimate.
• Choose a compensation approach and state which benefits are taxable.
• Assign owners for tax, immigration and payroll for each move.
• Link the policy to your wider HR compliance controls and review it every year.

Expatriate Management covers the assignment lifecycle, and Repatriation covers the return. For arrivals, see our global employee onboarding guide.

HR Cloud keeps employee records in one place through its HRIS software, so assignment details stay with the employee file.

Discover how our HR solutions streamline onboarding, boost employee engagement, and simplify HR management

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Frequently Asked Questions

Q: When does a company need a formal global mobility program?

A: Usually when assignments become recurring instead of rare exceptions.

Q: Does global mobility include inbound assignments to the United States?

A: Yes. Foreign employees sent to a U.S. office need work authorization and the correct tax setup, so most programs cover both directions.

Q: Should HR outsource mobility to a relocation or tax provider?

A: Many employers use specialists for tax, immigration and moving logistics. HR should still own the policy and the decisions.

Q: How do you measure whether a mobility program works?

A: Track actual cost against budget, the share of assignments completed, and how many assignees stay with the company after returning.

Q: Is an employee who relocates abroad on their own part of the program?

A: Most employers treat these as separate requests. A self-initiated move can still create tax and legal exposure, so review each one before approving.

Q: Who pays for the family's costs on an assignment?

A: That depends on the policy. Long-term packages often cover family support, while short-term ones often do not.