Finland finishes 200 kilometres of fence on the NATO border with Russia

Finland completed 200 kilometres of barrier fence on its border with Russia on Monday, 7 September, the Finnish Border Guard said at a briefing near the Nuijamaa crossing in the southeast. Interior Minister Mari Rantanen stood at the site and said the country may later decide that more fence is needed.

The finished works are not a single wall. They are dozens of sections along a 1,340-kilometre frontier, the longest border any European Union or NATO member shares with Russia. About 140 kilometres sit in the southeast. Another 35 kilometres run through North Karelia. Roughly 25 kilometres cross Kainuu and reach Finnish Lapland. The fence passes through 17 municipalities and over land owned by about 1,000 people. The state paid those owners some €3 million.

Each section is a 4.5-metre metal fence with cameras, lights and loudspeakers, a patrol road, and a 25-metre cleared strip. The Border Guard put the bill at €356 million, €22 million under the original budget. Meduza, citing Yle, said yearly upkeep is expected to run about €1.5 million. Construction finished slightly ahead of schedule.

Why the fence exists

Finnish parties agreed in October 2022 to back a barrier after Russia announced mobilisation and nearly 17,000 Russians entered Finland in a single weekend. A pilot went in at Pelkola, near Imatra, in April 2023. Main building ran from 2024 to 2026. In autumn 2023 Finland closed crossing points after a surge of third-country nationals arriving from the Russian side, a flow Helsinki called directed migration.

The official purpose is to stop irregular crossings and to give officers a physical line they can watch with sensors. It is not designed to stop an army. A 4.5-metre fence on 200 kilometres of a 1,340-kilometre forest and lake border is a migration and policing tool. Rantanen said it is part of a wider surveillance system and that it also serves the EU’s external border. She asked for EU money for eastern member states that build similar works.

Russia has called the project a hostile gesture. Finland joined NATO in 2023 and closed most practical cross-border traffic. The fence is the built form of that political break. It does not reopen the crossings. It makes unofficial ones harder in the places Helsinki judged busiest and cheapest to fence.

What 200 kilometres does not cover

More than 1,100 kilometres of border still have no fence. Those stretches are forest, swamp and water. The Border Guard said it fenced ground where operational need was highest and construction made financial sense. Rantanen left the door open to more sections. That would take another budget fight and more land deals.

Critics inside Finland have asked whether €356 million would have bought more if spent on officers, drones and radar rather than steel. The government’s answer is that a fence channels people to official roads and slows anyone who tries the woods. The 2023 spike is the exhibit. Once crossings closed and physical barriers went up on the busy stretches, the flow fell.

For NATO planners the Finnish border is now the alliance’s longest edge with Russia. The fence does not change that geometry. It changes the daily work of the Border Guard on the roads where people actually walk. Maintenance at €1.5 million a year is the standing cost of that choice. The political cost sits in Moscow and in the towns that used to live off cross-border shopping.

Monday’s ceremony at Nuijamaa closed the construction file. The operational file stays open every night the sensors run.