Finnish Work Requirements
In general citizens of the vast majority of EU/EEA member states do not need any special permit in order to undertake paid employment in Finland, although citizens of newer members of the EU (generally states that joined in 2004 onwards) must register with an employment office. If the duration of employment is longer than three months, EEU/EEA citizens must only register their right to reside in Finland at a local police station. This does not mean they require a special residence or work permit.
The right to reside in Finland is valid until further notice. After five years of continuous residence in Finland, the employee is entitled to apply for permanent right of residence.
Working in Finland with a permit granted by another country is usually not allowed. Especially if the duration of the job is longer than 90 days.
When is a residence permit not necessary?
In particular cases it is sufficient, that a residence permit or a visa is granted by another Schengen country, or it is allowed to reside in Finland without a visa. In these situations, the right to work is limited to certain jobs, and it generally applies for a maximum of 90 days, yet no longer than your visa is valid.
Which permits include a right to work?
In case of another type of a residence permit granted by the state of Finland, you may have the right to work. In such case, you do not need any other residence permit to be allowed to work. Check from your residence permit and the residence permit decision whether you have the right to work in Finland.