Registering a foreign worker for social insurance in Serbia through CROSO

A foreign worker holding a single permit is registered for mandatory social insurance exactly like a Serbian employee. The single registration is filed electronically with the Central Registry of Mandatory Social Insurance, on the M form, no later than the day before work starts. Without it the work is unlawful even though the permit exists.

That gap between permit and registration is the most common defect in the files we see. The permit grants the right to work; the registration with the Central Registry grants insured status. Inspection findings are built in the space between those two dates.

One filing, three insurances

The Central Registry of Mandatory Social Insurance combines pension and disability insurance, health insurance and unemployment insurance. Instead of three separate files with the Pension and Disability Insurance Fund, the Health Insurance Fund and the National Employment Service, the employer submits one registration through the registry portal.

The deadline allows no margin: registration no later than the day before work starts. Deregistration follows the end of the employment relationship, and the employer hands the confirmation of registration to the employee. For a foreign worker the registration is tied to the identification data from the permit, so in practice the file cannot be closed until the permit has been issued.

Posted workers sit differently. Where a social security agreement exists between Serbia and the country of the foreign employer, the worker can remain in the home country system, and the Social Insurance Institute is Serbia's liaison body for applying those agreements. Serbia applies them with roughly 30 states, among them Germany, Austria, Croatia, Turkey and Russia, so every corridor needs that check before anyone assumes contributions are due in Serbia.

Serbia holds no such agreement with Nepal, India, Bangladesh or the Philippines. For workers from those countries contributions fall due in Serbia under the general regime, with no posting exemption and no transfer of service back home. That is also the answer to the question candidates ask before departure: years worked in Serbia count towards Serbian pension service and are not aggregated with service in the country of origin until an agreement exists.

What it costs the employer

The rates are set by Article 44 of the Law on Contributions for Mandatory Social Insurance and they are identical for domestic and foreign employees. Payroll tax is 10 percent, and for 2026 the non taxable amount of salary is 34,221 dinars a month under the adjusted figures published by the Ministry of Finance.

Contributions are calculated on gross pay, and the non taxable amount affects only the tax. Employers who price an hour from the net figure agreed with a worker in Kathmandu or Delhi routinely understate the true cost, because the employer share never enters that conversation. The full arithmetic, fees and arrival costs included, sits in the cost of hiring a foreign worker in Serbia.

Three defects that repeat

The first is the date. A registration filed on the day work starts is late, because the law requires the day before. When a worker walks onto site in the morning and the filing lands at noon, the finding reads as work without registration and is treated as undeclared work.

The second is health cover before registration. Between entering Serbia and being registered, a foreign worker is not covered by domestic health insurance. Employers close that window with travel health insurance, and it has to be bought before departure rather than on arrival. The parallel duty to register the address of stay is set out in worker accommodation and employer obligations.

The third is a change of employer. When a worker moves, the previous employer files a deregistration and the new one files a fresh registration. A missing deregistration leaves double insurance and blocks the new filing, which keeps the worker out of the records for days. The permit side of that move is covered in changing employer on a Serbian single permit.

Registration is the last step an employer fully controls and the only one that cannot be repaired backwards. When the registration date sits one day ahead of the first shift for every worker in the cohort, the rest of the payroll file follows. For groups arriving from several countries at once, our employer desk builds the registration calendar against the arrival dates.