Grant Thornton alerts Northern Ireland Employers about Proposed Changes to EU Social Security Rules for Cross-Border Workers
June 25, 2026 – Grant Thornton has warned that Northern Ireland employers with staff travelling regularly to the Republic of Ireland or elsewhere in the European Union could face increased compliance obligations from as early as October 2026 under proposed reforms to EU Social Security changes.
The European Union has reached a provisional agreement to revise the long-standing rules governing the coordination of social security systems across Member States (Regulation (EC) No. 883/2004). The proposed reforms are designed to modernise rules that govern employees who work across multiple European countries to determine where employer and employee social insurance contributions should be paid and reflect the growing prevalence of remote working, international business travel and cross-border employment.
While the UK is no longer a member of the European Union, the proposed changes remain highly relevant for many Northern Ireland businesses given the number of companies whose employees regularly travel between Northern Ireland, the Republic of Ireland and other EU Member States.
Among the proposed changes are enhanced requirements relating to A1 certificates, which confirm the social security legislation that applies when employees work temporarily in another country. The reforms also introduce tighter conditions around employee postings and seek to strengthen oversight of individuals who work across multiple jurisdictions.
Under the existing regime, many employers retrospectively seek A1 certificates after an employee has commenced duties in an EU State. The proposed reforms place greater emphasis on obtaining A1 certificates before cross-border work begins. While there will be some flexibility introduced, such as limited exemptions for short business trips, employers will need to proactively ensure compliance and ensure appropriate controls are in place to track employee movements.
The changes are expected to have implications for a wide range of sectors across Northern Ireland, including construction, manufacturing, professional services, technology and life sciences, where employees frequently travel across borders for projects, client work and business development activities.
Commenting on the proposed changes, Clare Fitzgerald, Director - Employer Solutions, Grant Thornton, said:
"Northern Ireland occupies a unique position because many organisations operate seamlessly across both UK and EU markets. While these reforms are being driven by the European Union, businesses here cannot afford to assume they are unaffected.
"How and where people work has changed significantly in recent years. Employees are increasingly travelling internationally, working remotely while abroad and supporting projects across multiple jurisdictions. The proposed reforms reflect a growing desire among authorities to have greater visibility of these arrangements and ensure the correct social security rules are being applied.
"Employers might view these proposals as something for the future, but the reality is that a final vote is expected in the European Parliament in July and the new rules could be in force as early as October 2026. At the same time, employers are already navigating a more complex environment following Brexit, with UK and EU social security arrangements continuing to evolve separately.
"For Northern Ireland businesses, the challenge is not simply understanding one set of rules but understanding how different UK and EU frameworks interact. Organisations with employees travelling across borders need to ensure they have robust processes in place to manage that complexity.
"Many business leaders will understandably be focused on day-to-day priorities over the coming months, but delaying preparations could prove costly. Northern Ireland's economy depends on cross-border trade and mobility, and employers need to be ready for a world where regulators increasingly expect to know exactly where employees are working and when."
ENDS