The hidden tax and visa compliance risks when employees work abroad

While debates over the future of globalisation continue, the practical reality for many businesses is that international operations remain central to their growth ambitions. Recent coverage in Accountancy Today has rightly addressed the financial and strategic considerations of international expansion. But there’s another critical dimension that often gets overlooked: the people side of doing business globally.

When staff travel abroad for work, attend overseas client meetings, or fully relocate to take on international assignments, businesses become exposed to a complex web of compliance obligations spanning tax, immigration, social security and labour law. The consequences of getting this wrong can be severe.

Take the high-profile raid on a Hyundai-LG Energy facility in Georgia as a cautionary tale. While this case centred on work authorisation violations, it highlights how authorities worldwide are intensifying scrutiny of cross-border workforce movements. At the very least, in the current climate, countries want to ensure that everyone working within their borders is paying the appropriate taxes. What might seem like routine business travel can quickly escalate into compliance nightmares with financial penalties, reputational damage and operational disruption.

When business trips become tax events

Seemingly innocent business activities can trigger significant compliance obligations and, therefore, direct corporate risk. A senior partner travelling to Munich to pitch for new business? That could create Permanent Establishment (PE) exposure. An architect spending three months at a client’s Paris office? Potential tax residency implications and Posted Worker notification requirements.

When a company sends an employee abroad to work, the employer usually takes primary responsibility for managing tax arrangements, including determining where income is taxable, handling payroll and social security obligations, and often applying tax equalisation policies to keep the employee’s net pay consistent. However, the employee remains legally responsible for ensuring their personal tax filings are accurate and complete in all relevant countries. These things are complex to manage, which is why companies typically rely on global mobility or tax specialists to ensure compliance and fairness for both parties. 

One issue is that different jurisdictions have wildly varying thresholds. In some countries, just 60 days of presence can trigger tax residency. Others monitor cumulative days across multiple visits. France’s €1 billion settlement with Google over permanent establishment disputes demonstrates how high the stakes can be.

Even short-term business travel can trigger a cascade of compliance issues, including work authorisation requirements, tax withholding obligations, the need for social security certificates, Posted Worker registrations and wider immigration compliance issues.

The digital surveillance factor

Compliance risks are intensifying as governments deploy sophisticated digital border systems. The EU’s new Entry/Exit System (EES) and European Travel Information and Authorisation System (ETIAS) will create unprecedented audit trails of cross-border movements

These systems automatically capture entry and exit data, providing tax authorities with ready-made evidence of employee presence in their jurisdictions. What you don’t track internally, revenue services can now verify independently. If your firm can’t demonstrate robust monitoring of international activities, you’re vulnerable to investigations and penalties based on data you never even knew existed.

Payroll becomes exponentially complex

International assignments complicate payroll dramatically. You may need to operate split payrolls across multiple countries, each with different tax rates, social security systems, and reporting requirements. Miss a filing deadline or withhold the wrong amount, and you’re facing penalties, interest charges and potential personal liability for directors. The administrative burden compounds quickly. 

Practical steps to take control

The good news is these risks are manageable with the right approach:

• Implement travel compliance monitoring – Implement and maintain a set of rules for each of the countries where employees will be working, to track employee international movements systematically. Monitor cumulative days of presence against tax and visa thresholds. 
• Define what constitutes business travel – Establish clear policies distinguishing between business trips, remote work and assignment work. Apply these definitions consistently across all jurisdictions.
• Budget for compliance – Factor mobility compliance costs into project planning and client pricing. This isn’t optional overhead; it’s essential risk management.
• Invest in the right technology – Manual tracking doesn’t scale. Automated compliance systems pay for themselves by preventing penalties and freeing your team from administrative burden.
• Get expert input – International mobility compliance sits at the intersection of tax, immigration, employment law and social security. It’s a specialism in its own right. Know when to seek advice.

The strategic imperative

The cost of mishandling international employee mobility can far outweigh the investment in getting compliance right. The Hyundai ICE raids and the immigration crackdowns of recent years serve as stark reminders of the risks businesses face when they fall short. Working abroad isn’t going away any time soon. For finance leaders, global mobility presents a strategic risk that deserves the same rigour and oversight as any major financial exposure.