Finnish citizenship: the language requirement and the YKI test

To become a Finnish citizen by naturalisation you must show satisfactory oral and written skills in Finnish or Swedish. A common way to prove it is the YKI test for Finnish citizenship — the National Certificate of Language Proficiency at intermediate level, grade 3. This guide explains the rule as Finland's Citizenship Act and the Finnish National Agency for Education (OPH) set it out today, what changes on 1 January 2027, and how to prepare. To see where you stand, take the free Finnish level test — it checks A1 to B2 in a few minutes.

Updated November 7, 2026 · 6 min read

What the law asks for

Section 13 of the Citizenship Act (359/2003) lists the general requirements for naturalisation. You must be at least 18, have lived in Finland permanently for the past eight years, meet the integrity and financial requirements, and have satisfactory oral and written skills in the Finnish or Swedish language — or equivalent skills in Finnish Sign Language or Finland-Swedish Sign Language. You choose which of the two national languages you prove: Swedish counts exactly as much as Finnish. If Swedish is your stronger language, our free Swedish level test shows your level too.

Eight ways to prove your Finnish or Swedish

Section 17 of the Act lists what counts as proof. You need one of them:

1. The YKI test (National Certificate of Language Proficiency) at proficiency level 3.
2. The public administration language examination showing satisfactory oral and written skills.
3. Finnish basic education (primary and lower secondary) with Finnish or Swedish as mother tongue or second language.
4. Finnish general upper secondary education with Finnish or Swedish as mother tongue or second language.
5. The Finnish matriculation examination in Finnish or Swedish.
6. An initial vocational qualification completed in Finnish or Swedish.
7. A further or specialist vocational qualification completed in Finnish or Swedish.
8. Language studies or a maturity test in Finnish or Swedish at a Finnish university or university of applied sciences.

The YKI test in short

According to OPH, the YKI is a language test for adults with four subtests — listening, speaking, reading and writing — and a separate grade for each. It is offered in nine languages, but only the Finnish and Swedish certificates count for a citizenship or permanent-residence application. OPH says that taking the test at intermediate level, grade 3 or higher is enough for citizenship.

You choose the level when you register and you are only graded within that level, as the test-day page explains. So for citizenship you normally take the intermediate test: grade 3 corresponds to B1, grade 4 to B2. Below 3 means you did not reach the level in that subtest — not that the whole test is void, as OPH's results page puts it. The law asks for oral and written skills, so look at your speaking and writing grades in particular.

Fees

OPH's registration page lists €165 for a basic test, €190 for intermediate and €216 for advanced. On the special Finnish and Swedish intermediate days where you take only some subtests, listening costs €43, speaking €84, reading €43 and writing €70. Registration is binding: you get a refund only if you fall ill, cancel by 8 a.m. on the test day and apply within two weeks.

Dates and registration

You register online during a registration period of roughly two months before the test, from 10:00 on the first day; OPH warns that Finnish intermediate places often go quickly. From spring 2027 all Finnish and Swedish YKI tests are taken digitally. In spring 2027 the full Finnish intermediate test is on 16 January, 13 February and 10 April, with intermediate days for only some subtests on 10 March, 12 May and 2 June — check the exact level and registration window for each date on OPH's page. The certificate arrives about two months after the test; for tests from April 2026 it can be digital, in My Studyinfo.

From 1 January 2027: a citizenship test as well

Act 552/2026 adds a new requirement that enters into force on 1 January 2027: sufficient knowledge of Finnish society. According to sections 17b and 25a of the Act, it is shown by passing a citizenship test, by the matriculation examination in Finnish or Swedish in Finland, or by a university degree completed in Finnish or Swedish in Finland. The test is multiple choice, taken electronically in Finnish or Swedish, and based on publicly available learning materials covering Finnish law, fundamental and human rights, equality, history and culture. You pass when most of your answers are correct. It does not apply to people under 18 or aged 65 and over.

Shorter residence if you already speak the language

Section 18a lets an applicant who meets the language requirement and has strong ties to Finland apply after five years instead of eight. Days abroad also count: up to 365 days in the whole period, but at most 90 in the year before the decision (section 16). A stay abroad of more than five years in one go restarts the count.

Exemptions from the language requirement

Section 18b allows citizenship without the language proof in limited cases: when it is unreasonably hard to do your permanent full-time work without Finnish citizenship; when you are 65 or older and have refugee, subsidiary or humanitarian protection; when your health or a sensory or speech disability prevents it; or for other very serious reasons. People who cannot read and write, or who are 65 or older, may be exempted if they have elementary spoken skills or have studied Finnish or Swedish regularly — shown by a certificate from their teacher.

A realistic way to prepare

• Measure first. The Finnish level test or the Swedish level test tells you whether you are near B1 or still at A2.
• Book early. Registration opens about two months before each test and Finnish intermediate dates fill fast; the result takes another two months.
• Practise speaking and writing. These are the oral and written skills the law names — record yourself, write short e-mails and messages about everyday matters.
• Get used to the digital format before spring 2027, when every Finnish and Swedish test moves on screen.
• From 2027, plan for the citizenship test too and read its official learning materials when they are published.

How other countries compare

Finland's B1 sits in the middle of Europe's citizenship rules. Spain asks for DELE A2 plus the CCSE, Portugal for A2 Portuguese, Italy for B1 Italian, the Netherlands for A2 Dutch and a naturalisation test, Belgium for A2 in one national language and Luxembourg for spoken Luxembourgish.

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