Around 500,000 Russian troops have been killed since Moscow launched its full-scale invasion of Ukraine, according to Britain’s chief of defence, underscoring the mounting human and economic costs of the Kremlin’s war.
Sir Richard Knighton, the UK’s Chief of the Defence Staff, said in a prepared statement to journalists on Thursday that Russia’s total casualties — including killed, wounded and missing — were estimated at about 1.5mn since February 2022.
“I think these numbers illustrate clearly the senseless and futile waste of human life for such little progress, and against such an illegitimate aim of President (Vladimir) Putin,” Knighton said.
The majority of Russian losses have occurred since January 2023, according to Knighton. Over that period, Moscow has captured only about 2 per cent of Ukrainian territory, highlighting the high cost of its incremental battlefield gains.
Anne Keast-Butler, head of the UK’s intelligence, cyber and security agency, previously said that “new intelligence” indicated that almost 500,000 Russian troops had been killed by late May.
The latest estimate of total Russian casualties broadly corresponds with figures published by Ukraine’s General Staff, which said on September 11 that Russian losses had exceeded 1.5mn. Ukraine estimated that Russian forces had suffered a further 1,490 casualties over the preceding 24 hours.
The Ukrainian military said the Kremlin’s cumulative personnel losses now exceeded the combined toll suffered by Russian and Soviet forces in all wars and armed conflicts during the second half of the 20th century and the early 21st century.
The scale of the losses is also beginning to weigh on Russia’s economy, Knighton said, as the Kremlin attempts to sustain its military campaign while absorbing the demographic and fiscal consequences of prolonged mobilisation.
The deaths have “resulted in slowing growth in Russia, weakening consumer demand and stubbornly high inflation, and the cost of Russia’s economy and its people’s prosperity and prospects are enormous,” Knighton said.
Economic pressure has been compounded by Ukrainian attacks on Russian energy infrastructure. Heightened inflation risks following strikes on oil facilities contributed to the Russian Central Bank’s decision on September 11 to hold its key interest rate at 14 per cent.
The decision marked the first time the central bank had opted against cutting rates since mid-June 2025, reflecting the challenge policymakers face in balancing military spending and economic activity against persistent inflation.
Independent estimates also point to substantial Ukrainian losses. A June 2026 report by the Center for Strategic and International Studies estimated that Ukraine had suffered between 525,000 and 625,000 casualties from February 2022 to June 2026, including between 125,000 and 150,000 deaths in action.
The competing casualty estimates cannot be independently verified in full, but they underline the extraordinary human cost of a war that has entered its fifth year, with neither side showing signs of abandoning its core objectives.
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