Travel Compliance Knowledge Base

183 Day Rule

The 183-day rule helps to clarify tax liability abroad — comply with local requirements.

A1 certification (automation)

An automated A1 certification saves time and reduces errors.

A1 Certification Basics

The A1 certificate regulates social security abroad and avoids double contributions.

Business travelComplianceWorkation

Apply for A1 certification

A1 certificate: Apply online quickly and easily.

Business travelWorkation

A1 certificate via SV-Meldeportal

A1 certificate: Simply apply online via app.sv-meldeportal.de.

A1 certification: When is it necessary?

Proof of social security for EU business trips — mandatory for workers abroad

A1 certificate summary

The A1 certificate avoids double contributions and protects against heavy fines abroad.

Business travel

A1 certificates for Business Trips

All important information about the A1 certificate for business trips.

Workation

A1 certificates for workations

All information about A1 certificates for remote work abroad.

Labor Law

Labor law protects employees and regulates fair conditions.

WorkationCompliance

Permanent Establishments & Payroll Tax

When does a permanent establishment arise? And how can companies detect and manage the risks?

Establishment risk

Why international activities can lead to tax liability and the solution for this.

WorkationCompliance

Permanent Establishment Risk on Workations

Workation and Permanent Establishment Risk: When does foreign tax liability arise?

Business travelCompliance

Business Visa vs. Work Permit

Learn everything about Business Visa vs. Work Permit

WorkationBusiness travel

Digital Nomad Visa

Work and travel: Digital Nomad visas make it possible to work in different countries.

Double Taxation Agreement (DTA)

DBAs prevent double taxation and encourage international investment.

ComplianceBusiness travelWorkation

U.S. Entry Requirements 2025

Learn about the current entry requirements in the USA.

Business travelComplianceWorkation

Electronic Travel Authorisation (ETA)

Everything you need to know about entering the UK.

Business travelWorkation

Electronic A1 certificate for cross-border workers

The electronic A1 certificate has been valid for cross-border commuters since February 1, 2025.

Posted WorkersBusiness travel

Posting vs. Business Trip

What is a posting? Understand the difference to business travel, A1 certificate rules & more.

Posting to Greece

Dispatch to Greece: Legally compliant and seamless.

Posting to Denmark

Posting to Finland

Reporting to the Regional State Administrative Agency Finland — simple and legally secure.

Posting to Hungary

Business travelCompliance

EU EES & ETIAS

Find out more about the new EU entry requirements from 2025/26.

EU Posted Workers Directive

PWD made easy: Automated solutions for quick and accurate EU secondment notifications.

Posted WorkersBusiness travel

EU eDeclaration Portal

The European Union has announced the launch of a central EU eDeclaration Portal.

Compliance

G35 Examination

Find out more about the G35 preventive examination.

OECD model agreement

The OECD model agreement makes it easier to avoid double taxation

Business travelPosted WorkersCompliance

Posted Workers Directive and Equal Pay

The Posting of Workers Directive ensures equal working conditions in the EU.

ComplianceBusiness travel

Travel and Health Protection on International Postings

Everything about the duty of care and international health insurance for assignments abroad.

Social security agreement

Agreement secures social benefits for international employment.

Business travel

Tax Residency in Cross-Border Postings

How to avoid double taxation abroad: Tax residency