Certificate of Coverage (CoC)
What is Certificate of Coverage (CoC)?
A document issued by a home country's social security authority confirming that a worker on assignment abroad remains covered under the home country system, preventing dual social security contributions.
A Certificate of Coverage is essential when an employee is sent to work in a country that has a social security totalization agreement with the home country. Without a CoC, the employee and employer may be required to pay social security contributions in both the home and host countries simultaneously.
The CoC confirms that the worker remains subject to the social security legislation of the home country for the duration of the assignment, typically up to five years depending on the bilateral agreement. Employers must apply for the CoC before the assignment begins or shortly after arrival in the host country.
Failure to obtain a CoC can result in significant financial penalties, retroactive contributions, and compliance risks. Mobility teams should work closely with social security authorities and tax advisors to ensure timely issuance and renewal of certificates.
Related Terms
Social Security Totalization Agreement
A bilateral treaty between two countries that eliminates dual social security taxation and ensures workers qualify for benefits from one, and only one, country's social security system during an assignment.
Immigration Compliance
The process of ensuring that employees working abroad hold the correct visas, work permits, and authorizations required by host country law, and that all documentation remains current.
Shadow Payroll
A payroll run in the host country solely for tax and social security compliance purposes, without actually paying the employee through that payroll. The employee continues to receive their salary via home country payroll.