Rank #54 · Europe
Bulgaria crossed NATO's 2% of GDP defence spending target in 2024-2025, driven largely by the transformative F-16 Block 70 fighter acquisition — its first Western combat aircraft — and pressure from Russia's war in Ukraine on its eastern flank. The Bulgarian Armed Forces are undergoing a generational platform transition from Soviet-era equipment to NATO-standard systems, though political instability has repeatedly delayed key procurement decisions.
Bulgaria's defence budget of approximately BGN 5.8 billion for 2025 reflects a sharp nominal increase over 2022 levels — roughly doubling in three years — as political consensus around NATO obligations solidified under the Russia-Ukraine war backdrop. The largest single cost item is the F-16 Block 70 programme: eight aircraft were contracted in 2019 for ~$1.67 billion, with deliveries running 2025-2026 and a second batch of eight under discussion. Additional capital items include Stryker infantry fighting vehicles (183 contracted from General Dynamics in 2022), Airbus H145M light helicopters, and 155mm ammunition stockpile replenishment after large transfers to Ukraine. Personnel accounts are constrained by demographic decline and emigration-driven recruitment difficulties.
The Bulgarian Armed Forces comprise the Bulgarian Land Forces (~18,000), Bulgarian Air Force (~6,700), and Bulgarian Navy (~3,500), totalling ~27,000 active duty — one of NATO's smallest by headcount. The Land Forces are transitioning from Soviet BMP-1 IFVs and T-72 tanks to Stryker wheeled vehicles, with Leopard 2 main battle tanks under consideration. The Air Force retired its MiG-29 fleet in 2023 and stands up the F-16 Block 70 squadron at Graf Ignatievo — a symbolic milestone as Bulgaria's first Western fighter. The Black Sea Navy operates frigates (Wielingen-class from Belgium) and mine countermeasure vessels, with NATO rotational presence at Varna and Burgas.
Bulgaria retains a legacy Soviet-era defence industry — one of the largest arms exporters in Eastern Europe by volume — centred on Thrace ammunition plants, VMZ-Sopot (rockets, artillery shells), and Arsenal AD (small arms). This capacity proved valuable: Bulgaria transferred significant stocks of 152mm artillery ammunition and BMP-1 vehicles to Ukraine in 2022-2023, becoming one of Ukraine's major early equipment suppliers (often via third countries). Domestically, the industry lacks capacity to produce major platforms and is heavily dependent on imports for fighters, helicopters, and armoured vehicles. EU defence industrial programmes (EDIP, ASAP) offer funding for Bulgarian ammunition factories to expand.
Bulgaria borders NATO ally Romania, non-NATO partner Moldova, and is across the Black Sea from the active Ukraine war. Russian naval activity in the Black Sea — and the wreck hazard from mines drifting toward Bulgarian waters — keeps the Navy on elevated alert. Bulgaria contributed to NATO's enhanced Forward Presence in Romania and hosts NATO airspace policing rotations. Domestically, Bulgaria faces hybrid threats: Russian intelligence services have been linked to multiple sabotage plots and assassination attempts against Bulgarian officials since 2022 — the largest such disclosed operation in NATO Europe. Political instability (seven elections since 2021) has complicated sustained defence planning.
Bulgaria received the first two F-16 Block 70 fighters at Graf Ignatievo in October 2025, completing the initial training detachment in the United States. The Bulgarian parliament approved a second batch of eight F-16 Block 70s in December 2025, bringing the total programme to 16 aircraft. Stryker ICV deliveries began in mid-2025 with 40 vehicles received. NATO's April 2026 force model assigned Bulgaria primary responsibility for a new Baltic Sea coast sector reaction force, increasing pressure to accelerate reserve recruitment. The SIPRI April 2026 report noted Bulgaria's 2025 spend crossed 2% of GDP for the first time since the post-Cold War drawdown.
Yes, Bulgaria crossed the 2% of GDP threshold in 2024 and sustained it through 2025, driven by F-16 Block 70 payment schedules and Stryker IFV procurement. This followed years of lagging below 1.5%; Russia's 2022 invasion was the political catalyst for sustained increases.
Bulgaria contracted for eight F-16 Block 70 fighters from Lockheed Martin in 2019 for ~$1.67 billion — its first Western combat aircraft, replacing Soviet-era MiG-29s. Deliveries began in late 2025. A second batch of eight was approved in December 2025, bringing the total to 16.
Yes — Bulgaria was one of Ukraine's largest early suppliers, transferring Soviet-compatible 152mm artillery ammunition, BMP-1 infantry fighting vehicles, and T-72 spare parts, often via intermediary countries to maintain political deniability. This significantly drew down Bulgarian stockpiles.
Approximately 27,000 active duty personnel across Army, Air Force, and Navy. This is among NATO's smallest by headcount. Recruitment is structurally constrained by Bulgaria's shrinking and ageing population — the EU country with the fastest demographic decline.