IKN stands for Ibu Kota Nusantara, "Nusantara Capital City", Indonesia's new national capital, under construction in East Kalimantan on the island of Borneo. It's intended to eventually replace Jakarta as the seat of Indonesia's government.

The idea was announced by President Joko Widodo in 2019, and became law in January 2022 through Law No. 3 of 2022, which gave the relocation its formal legal foundation. Two goals drive the project. First, relieving Jakarta, a city that's carried the weight of being Indonesia's capital for over a century and now deals with severe overcrowding, traffic congestion, and land that's literally sinking in places. Second, shifting some of Indonesia's economic center of gravity away from Java, where growth has concentrated for decades, toward the less-developed eastern regions of the country.

Nusantara is designed around a "smart forest city" concept, meaning a large share of its total area is deliberately kept as green space rather than built environment, a different approach from how most capitals have grown historically.

Here's where the picture gets more specific than a simple "moving day." Under President Prabowo Subianto, Presidential Regulation No. 79 of 2025 sets a target for IKN to become Indonesia's political capital, meaning the center of executive, legislative, and judicial decision-making, by 2028. That target involves an initial 1,700 to 4,100 civil servants relocating, a meaningful first step but a small fraction of Indonesia's full civil service. Legislative and judicial buildings are targeted for completion in 2027, ahead of that milestone. President Prabowo's own office move is targeted for August 17, 2028, Indonesia's Independence Day, with officials noting 2029 as a possible fallback.

One important legal detail: Jakarta remains Indonesia's constitutional capital until the president signs a separate Presidential Decree formally transferring that status, something that hasn't happened yet. Indonesia's Constitutional Court addressed this directly in May 2026, rejecting a legal challenge and confirming that Jakarta's current "transitional capital" status doesn't block IKN's ongoing development or preparation, but the formal transfer still depends on that future decree.

Funding hasn't moved in a straight line either. IKN's 2026 budget was set at roughly Rp 6.3 trillion, down from about Rp 12.5 to 13 trillion the year before, a reminder that the 2028 target, while official policy, still depends on sustained investment to be met.