Key rules
Russia
The procedure is set by Federal Law No. 138-FZ (in force since 26 October 2023). You apply to the Ministry of Internal Affairs (МВД, MVD); the state fee for applications from 26 July 2026 is 50,000 ₽ (previously 4,200 ₽). Citizens of Belarus and Kazakhstan, as a rule, can use a simplified procedure without 5 years on a residence permit (ВНЖ, VNZh). The rules change, so check the MVD website and Gosuslugi (Госуслуги).
Sources: Ministry of Internal Affairs of Russia («МВД России», мвд.рф): migration services, Gosuslugi («Госуслуги»)