Membership fee for 2024 is 1.2% of your monthly salary but at least 35 € and a maximum of 38 € per month.
This fee includes the organization (Tietoala), the Union (Insinööriliitto ) and the unemployment insurance fund (KOKO) membership fee.
Please note that if you are a student, currently unemployed or retired, you can have certain discounts from the full fee.
You can find more details about the fees from here.