Conscription in Finland is part of a general compulsion for national military service for all adult males (Finnish: maanpuolustusvelvollisuus; Swedish: totalförsvarsplikt) defined in the 127§ of the Constitution of Finland.
Conscription can take the form of military or of civilian service. According to Finnish Defence Forces 2011 data slightly under 80% of Finnish males turned 30 had entered and finished the military service. The number of female volunteers to annually enter armed service had stabilised at approximately 300. The service period is 165, 255 or 347 days for the rank and file conscripts and 347 days for conscripts trained as NCOs or reserve officers. The length of civilian service is always twelve months. Those electing to serve unarmed in duties where unarmed service is possible serve either nine or twelve months, depending on their training.
Any Finnish citizen who refuses to perform both military and civilian service faces a penalty of 173 days in prison, minus any served days. Such sentences are usually served fully in prison, with no parole. Jehovah's Witnesses are exempted in that they may be granted a deferment of service for 3 years upon presentation of a certificate from their congregation's minister showing they are an active member of that religious community. Providing they are still an active member 3 years later, there is nothing to stop them getting a further certificate and deferment. The inhabitants of the demilitarized Åland Islands are exempt from military service. By the Conscription Act of 1951, they are, however, required to serve a time at a local institution, like the coast guard. However, until such service has been arranged, they are freed from service obligation. The non-military service of Åland islands has not been arranged since the introduction of the act, and there are no plans to institute it. The inhabitants of Åland islands can also volunteer for military service on the mainland. As of 1995, women are permitted to serve on a voluntary basis and pursue careers in the military after their initial voluntary military service.
The military service takes place in Finnish Defence Forces or in the Finnish Border Guard. All services of the Finnish Defence Forces train conscripts. However, the Border Guard trains conscripts only in land-based units, not in coast guard detachments or in the Border Guard Air Wing. Civilian service may take place in the Civilian Service Center in Lapinjärvi or in an accepted non-profit organization of educational, social or medical nature.
The Finnish Defence Forces is based on a universal male conscription. All men above 18 years of age are liable to serve either 165, 255 or 347 days. Yearly about 27,000 conscripts are trained. About 80% of Finnish male citizens complete the service. Thus, Finland has one of the highest rates of conscription, along with such countries as Israel, Armenia, South Korea, Turkey, Estonia, and North Korea. The conscripts first receive basic training (8 weeks), after which they are assigned to various units for special training. Privates who are trained for tasks not requiring special skills serve for five and half months. In technically demanding tasks the time of service is eight and half or (in some cases, such as those selected for NCO or officer training) eleven and half months.