• Insights

The Importance of A1 Certificates

May 24, 2024

The Importance of A1 Certificates

Countries / Territories

  • European UnionEuropean Union
  • BelgiumBelgium
  • United KingdomUnited Kingdom

Related contacts

Photo of Harry Goldstraw

Harry Goldstraw

Senior Manager

London, United Kingdom

Email

[email protected]

T:+44 (0)207 090 9299

Related offices

  • Brussels
  • London

Share

  • Twitter
  • Facebook
  • LinkedIn

Share

  • Twitter
  • Facebook
  • LinkedIn

Related contacts

Photo of Harry Goldstraw

Harry Goldstraw

Senior Manager

London, United Kingdom

Email

[email protected]

T:+44 (0)207 090 9299

Related offices

  • Brussels
  • London

Share

  • Twitter
  • Facebook
  • LinkedIn

Share

  • Twitter
  • Facebook
  • LinkedIn

Related contacts

Photo of Harry Goldstraw

Harry Goldstraw

Senior Manager

London, United Kingdom

Email

[email protected]

T:+44 (0)207 090 9299

Related offices

  • Brussels
  • London

Share

  • Twitter
  • Facebook
  • LinkedIn

Share

  • Twitter
  • Facebook
  • LinkedIn

By: Harry Goldstraw, Victoria Barber, Marina Ocariz

What is an A1 certificate?

With an increasing number of employees working abroad, either temporarily or permanently, attention needs to be paid not only to immigration requirements but also to compliance regarding social security.

Social security can be broadly defined as the financial contributions from work paid to national schemes that protect social events or interests, i.e., state pensions, health insurance, unemployment benefits, family benefits, etc. Each country has its own scope and conditions and offers benefits of its social security systems.

The general rule for payment of social security is that you ‘pay where you work,’ contributing to the government system of the country in which you are employed. When an employee travels abroad for business or is temporarily posted to another country, the question arises – where and how is social security paid?

The EU has introduced protections for workers to allow them to maintain social security benefits in their home country, as well as ensuring they are only subject to the social security of one member state if temporarily working abroad.

Within the EU, the ‘home’ employing country can issue an A1 certificate to evidence the employee’s social security contributions and exempt them from paying it in the ‘host’ country where the employee is temporarily working. Outside of the EU, a Certificate of Coverage (CoC) may be issued where a (bilateral) social security agreement is in place.

A1 certificates and CoCs are required for a variety of workers including business travellers, employees and the self-employed on assignments or travelling for work. Depending on the agreement, these certificates can be valid for 12-60 months, after which employees may need to transfer to the host social security system.

Why is an A1 certificate important?

If a worker is posted to another member state, their employer can request an A1 certificate from the authorities in the employing country. Although it is possible to obtain A1 certificates retroactively, it is strongly recommended the A1 application is filed before the posting, as social security, immigration and posted worker notification compliance are closely connected.

The A1 certificate acts as proof of where the employee’s social security contributions are paid. For some EU countries, an A1 certificate is required for immigration filings. In Austria, immigration applications outside the EU as well as Van Der Elst permits require an A1 certificate. In Germany, a strict approach is taken by the national authorities (who are known to exchange information) which would even require someone working abroad for a few hours to have an A1 certificate in place.

Even where no immigration permit is required, a posted worker notification (PWN) may still be required for the assignment. A PWN is often required when an employee is temporarily working in an EU country.

There is a strong link between social security and PWN compliance, as most EU countries require an A1 or CoC as part of the mandatory documents to be kept on the employee’s file with their PWN. Some countries, such as Luxembourg, even require the A1/CoC to be submitted during the PWN application, so obtaining the A1 ahead of the assignment is crucial.

Significant financial penalties for failure to comply with this can be imposed. In France, for example, penalties for non-compliance with document retention requirements are up to 4,000 EUR per employee and 8,000 EUR for repeat offences (failure to file another notification within the next two years) up to a total of 500,000 EUR. Additionally, there is joint liability between the home (sending) and host (receiving) companies.

The need for A1 compliance is further highlighted by the increase in information sharing between different national labour, immigration and social security authorities. Although this data exchange is not formally regulated, it occurs always more often and non-compliance in one area can trigger inspections in other areas. We have seen during Spanish PWN inspections that the authorities have specifically asked for evidence of A1 compliance, on a very short-term basis.

The real-life impact of non-compliance can be severe. In some situations, employees may be denied access to the host entity or client worksite without an A1 certificate or PWN. This can have a knock-on effect not only on the employees themselves but also on businesses if they cannot deliver on client contracts or work deadlines.

The future of A1 compliance

The EU is currently working on modernising social security coordination through digitalisation.

This will be implemented at two levels: first, increasing data sharing between national authorities through the Electronic Exchange of Social Security Information (EESSI).

Second, streamlining procedures for citizens and businesses through the European Social Security Pass (ESSPASS) project. This will provide a simplified, digital solution to verify social security entitlements throughout the EU reducing administrative burdens for companies when sending their employees to temporarily work abroad.

How can Fragomen help?

The Fragomen Social Security team, thanks to a strong government strategies approach, is prepared to guide clients to optimise their social security programmes and ensure that A1 certificates are requested in accordance with the requirements of the EU Regulations, and make sure your company is compliant in immigration, posted workers and social security. This strategic approach will help you plan and ensure social security compliance from day one.

Need to know more?

For questions regarding A1/CoC compliance, please contact the Fragomen Social Security team at [email protected].

This blog was published on 24 May 2024, and due to the circumstances, there are frequent changes. To keep up to date with all the latest updates on global immigration, please subscribe to our alerts and follow us on LinkedIn, X, Facebook and Instagram.

Countries / Territories

  • European UnionEuropean Union
  • BelgiumBelgium
  • United KingdomUnited Kingdom

Related contacts

Photo of Harry Goldstraw

Harry Goldstraw

Senior Manager

London, United Kingdom

Email

[email protected]

T:+44 (0)207 090 9299

Related offices

  • Brussels
  • London

Share

  • Twitter
  • Facebook
  • LinkedIn

Share

  • Twitter
  • Facebook
  • LinkedIn

Related contacts

Photo of Harry Goldstraw

Harry Goldstraw

Senior Manager

London, United Kingdom

Email

[email protected]

T:+44 (0)207 090 9299

Related offices

  • Brussels
  • London

Share

  • Twitter
  • Facebook
  • LinkedIn

Share

  • Twitter
  • Facebook
  • LinkedIn

Related contacts

Photo of Harry Goldstraw

Harry Goldstraw

Senior Manager

London, United Kingdom

Email

[email protected]

T:+44 (0)207 090 9299

Related offices

  • Brussels
  • London

Share

  • Twitter
  • Facebook
  • LinkedIn

Share

  • Twitter
  • Facebook
  • LinkedIn

Explore more at Fragomen

Generic Insights

Blog post

2026 Immigration Regulatory Changes: What Academic Medical Centers Need to Know

In this blog, Counsel Christopher Wendt examines four developments AMCs should have on their radar and why preparing for them may require coordination across immigration, GME, research administration, HR, benefits, finance and more.

Learn more

Blog post

Five Questions to Consider Before Seeking Residence or Citizenship in Europe

Senior Manager Andreia Florina Ghimis and Manager Pierangelo D’Errico outline five key questions to ask before seeking residency in Europe.

Learn more

Awards

Fragomen Receives Brandon Hall Group™ Gold HCM Excellence Award® for Leadership Development

Fragomen received a Brandon Hall Group™ Gold HCM Excellence Award® in the Best Leadership Development Program category for The Leadership Lifecycle.

Learn more

Media mentions

People Management: Unpacking the New Overseas Talent ‘Concierge’ Service

Partner Charlotte Wills and Senior Manager Harry Goldstraw discuss the UK’s new overseas talent “concierge” service and what it means for high-growth businesses recruiting international talent.

Learn more

Blog post

A1-Bescheinigung oder Certificate of Coverage (CoC): Welches Dokument wird wann benötigt?

In this blog, Senior Manager Katharina Vorländer explains when A1 certificates and Certificates of Coverage (CoCs) may be required, the key differences between the two documents and what employers should consider before managing international assignments.

Learn more

Awards

Fragomen Attorneys Recognized in the 2027 Edition of The Best Lawyers in America™

Fragomen attorneys are recognized in the 2027 editions of The Best Lawyers in America™ and Best Lawyers: Ones to Watch® in America, including Partner Matthew Phillips and Senior Counsel Mitch Wexler as Lawyer of the Year recipients.

Learn more

Media mentions

Times of India: Trump’s New H-1B Visa Reality for Indians: Unpredictable Costs, Tougher Odds and Greater Risks

Partner K. Edward Raleigh discusses evolving H-1B policies and the importance of long-term immigration planning for Indian professionals and US employers.

Learn more
Generic Insights

Blog post

Die Niederlassungserlaubnis nach § 9 Abs. 3a AufenthG: Ein richtiger Schritt zur schnelleren und dauerhaften Integration von Ehegatten von Fachkräften

In unserem aktuellen Blog erläutert Ruben Fiedler, wer von der Regelung profitieren kann, welche Voraussetzungen gelten und was sie für Fachkräfte und ihre Familien in Deutschland bedeutet.

Learn more

Media mentions

EB5 Investors: Brazil Emerges as One of EB-5’s Fastest-Growing Markets Amid Economic Strain

Partner Gustavo Kanashiro discusses the factors driving Brazilian families’ growing interest in the EB-5 program, including wealth planning and long-term mobility.

Learn more

Blog post

Africa’s Growing Investment Ambitions Are Reshaping Immigration Policy

Partner Lunga Mani discusses how Africa’s growing investment ambitions are reshaping immigration policy, creating new mobility opportunities alongside increasing compliance and localisation requirements.

Learn more

Blog post

Healthcare Horizons: What Healthcare Employers Should Watch in the 2026 Immigration Regulatory Agenda

Counsel Christopher Wendt looks at the 2026 immigration regulatory agenda and three developments that could have a significant impact on healthcare organizations, from hospitals to research institutions and other clinical employers. 

Learn more

Podcast

Immigration in South Africa

Partner Lunga Mani and Director Johannes Kgotso Tiba discuss South Africa’s evolving immigration landscape and key considerations for employers, foreign nationals and global mobility teams.

Learn more
Generic Insights

Blog post

2026 Immigration Regulatory Changes: What Academic Medical Centers Need to Know

In this blog, Counsel Christopher Wendt examines four developments AMCs should have on their radar and why preparing for them may require coordination across immigration, GME, research administration, HR, benefits, finance and more.

Learn more

Blog post

Five Questions to Consider Before Seeking Residence or Citizenship in Europe

Senior Manager Andreia Florina Ghimis and Manager Pierangelo D’Errico outline five key questions to ask before seeking residency in Europe.

Learn more

Awards

Fragomen Receives Brandon Hall Group™ Gold HCM Excellence Award® for Leadership Development

Fragomen received a Brandon Hall Group™ Gold HCM Excellence Award® in the Best Leadership Development Program category for The Leadership Lifecycle.

Learn more

Media mentions

People Management: Unpacking the New Overseas Talent ‘Concierge’ Service

Partner Charlotte Wills and Senior Manager Harry Goldstraw discuss the UK’s new overseas talent “concierge” service and what it means for high-growth businesses recruiting international talent.

Learn more

Blog post

A1-Bescheinigung oder Certificate of Coverage (CoC): Welches Dokument wird wann benötigt?

In this blog, Senior Manager Katharina Vorländer explains when A1 certificates and Certificates of Coverage (CoCs) may be required, the key differences between the two documents and what employers should consider before managing international assignments.

Learn more

Awards

Fragomen Attorneys Recognized in the 2027 Edition of The Best Lawyers in America™

Fragomen attorneys are recognized in the 2027 editions of The Best Lawyers in America™ and Best Lawyers: Ones to Watch® in America, including Partner Matthew Phillips and Senior Counsel Mitch Wexler as Lawyer of the Year recipients.

Learn more

Media mentions

Times of India: Trump’s New H-1B Visa Reality for Indians: Unpredictable Costs, Tougher Odds and Greater Risks

Partner K. Edward Raleigh discusses evolving H-1B policies and the importance of long-term immigration planning for Indian professionals and US employers.

Learn more
Generic Insights

Blog post

Die Niederlassungserlaubnis nach § 9 Abs. 3a AufenthG: Ein richtiger Schritt zur schnelleren und dauerhaften Integration von Ehegatten von Fachkräften

In unserem aktuellen Blog erläutert Ruben Fiedler, wer von der Regelung profitieren kann, welche Voraussetzungen gelten und was sie für Fachkräfte und ihre Familien in Deutschland bedeutet.

Learn more

Media mentions

EB5 Investors: Brazil Emerges as One of EB-5’s Fastest-Growing Markets Amid Economic Strain

Partner Gustavo Kanashiro discusses the factors driving Brazilian families’ growing interest in the EB-5 program, including wealth planning and long-term mobility.

Learn more

Blog post

Africa’s Growing Investment Ambitions Are Reshaping Immigration Policy

Partner Lunga Mani discusses how Africa’s growing investment ambitions are reshaping immigration policy, creating new mobility opportunities alongside increasing compliance and localisation requirements.

Learn more

Blog post

Healthcare Horizons: What Healthcare Employers Should Watch in the 2026 Immigration Regulatory Agenda

Counsel Christopher Wendt looks at the 2026 immigration regulatory agenda and three developments that could have a significant impact on healthcare organizations, from hospitals to research institutions and other clinical employers. 

Learn more

Podcast

Immigration in South Africa

Partner Lunga Mani and Director Johannes Kgotso Tiba discuss South Africa’s evolving immigration landscape and key considerations for employers, foreign nationals and global mobility teams.

Learn more
Fragomen.com home
Select Language
  • English
  • French
  • French - Canadian
  • German

Select Language

  • English
  • French
  • French - Canadian
  • German
ContactCareersMediaClient Portal
Search Fragomen.com
  • Our Services
    For EmployersFor IndividualsBy IndustryCase Studies
  • Our Tech & Innovation
  • Our People
  • Our Insights
    Worldwide Immigration Trends ReportsMagellan SeriesImmigration AlertsEventsMedia MentionsFragomen NewsBlogsPodcasts & Videos
  • Spotlights
    Travel and Mobility Considerations: Situation in the Middle EastNavigating Immigration Under the Second Trump AdministrationImmigration Matters: Your U.S. Compliance RoadmapCenter for Strategy and Applied InsightsVietnamese ImmigrationView More
  • About Us
    About FragomenOfficesResponsible Business PracticesFirm GovernanceRecognition

Our Services

  • For Employers
  • For Individuals
  • By Industry
  • Case Studies

Our Tech & Innovation

  • Our Approach

Our People

  • Overview / Directory

Our Insights

  • Worldwide Immigration Trends Reports
  • Magellan Series
  • Immigration Alerts
  • Events
  • Media Mentions
  • Fragomen News
  • Blogs
  • Podcasts & Videos

Spotlights

  • Travel and Mobility Considerations: Situation in the Middle East
  • Navigating Immigration Under the Second Trump Administration
  • Immigration Matters: Your U.S. Compliance Roadmap
  • Center for Strategy and Applied Insights
  • Vietnamese Immigration
  • View More

About Us

  • About Fragomen
  • Offices
  • Responsible Business Practices
  • Firm Governance
  • Recognition
Select Language
  • English
  • French
  • French - Canadian
  • German

Select Language

  • English
  • French
  • French - Canadian
  • German
ContactCareersMediaClient Portal
Important Updates
Important Updates
August 24, 2026 | United StatesUnited States: Federal District Court Vacates State Department’s 75-Country Immigrant Visa Ban
August 24, 2026 | United StatesFragomen Receives Brandon Hall Group™ Gold HCM Excellence Award® for Leadership Development
August 24, 2026 | NamibiaNamibia: New Investor and Business Owner Permit Introduced
August 24, 2026 | United KingdomPeople Management: Unpacking the New Overseas Talent ‘Concierge’ Service
August 24, 2026 | Saudi ArabiaSaudi Arabia: Saudization Requirements Announced for Several Activities and Professions
August 24, 2026 | United StatesUnited States: Federal District Court Vacates State Department’s 75-Country Immigrant Visa Ban
August 24, 2026 | United StatesFragomen Receives Brandon Hall Group™ Gold HCM Excellence Award® for Leadership Development
August 24, 2026 | NamibiaNamibia: New Investor and Business Owner Permit Introduced
August 24, 2026 | United KingdomPeople Management: Unpacking the New Overseas Talent ‘Concierge’ Service
August 24, 2026 | Saudi ArabiaSaudi Arabia: Saudization Requirements Announced for Several Activities and Professions
August 24, 2026 | United StatesUnited States: Federal District Court Vacates State Department’s 75-Country Immigrant Visa Ban
Subscribe

Stay in touch

Subscribe to receive our latest immigration alerts

Subscribe

Our firm

  • About
  • Careers
  • Firm Governance
  • Media Inquiries
  • Recognition

Information

  • Attorney Advertising
  • Legal Notices
  • Privacy Policies
  • AI Transparency Statement
  • UK Regulatory Requirements

Our firm

  • About
  • Careers
  • Firm Governance
  • Media Inquiries
  • Recognition

Information

  • Attorney Advertising
  • Legal Notices
  • Privacy Policies
  • AI Transparency Statement
  • UK Regulatory Requirements

Have a question?

Contact Us
  • LinkedIn
  • Youtube
  • Instagram
  • Facebook
  • TikTok
  • Twitter

© 2026 Fragomen, Del Rey, Bernsen & Loewy, LLP, Fragomen Global LLP and affiliates. All Rights Reserved.

Please note that the content made available on this site is not intended for visitors / customers located in the province of Quebec, and the information provided is not applicable to the Quebec market. To access relevant information that applies to the Quebec market, please click here.