Kiev is "in a state of default" regarding its obligations toward Moscow and legal proceedings would ensue, the ministry said.
"Russia's finance ministry (...) has initiated procedures required for an immediate lawsuit against Ukraine," the statement said, adding that the lawsuit would be heard in a British court.
Ukraine announced last month it would not make the payment on its debt to Moscow after Putin vowed to sue Kiev if it failed to pay by the end of 2015.
Ukrainian authorities say it is not a sovereign loan by one state to another but rather a transaction made via the financial markets that is subject to terms agreed with other creditors.
Kiev reached a restructuring deal in August with its private creditors, including major banks and investment funds, which agreed to reduce their claims by 20 per cent.
Moscow however maintains that the loan cannot be considered private debt and has refused such conditions.
"Ukraine preferred defaulting on its debt obligations to holding honest negotiations," the finance ministry said, adding that the legal proceedings "do not preclude constructive dialogue to reach an acceptable settlement of the debt."
The dispute has been hampering the International Monetary Fund's USD 17.5-billion rescue plan for Ukraine, which restricts Kiev's ability to restructure billions of dollars in debt.
The Ukrainian parliament last week adopted its 2016 budget with a deficit of 3.7 per cent of GDP, a crucial step for unlocking much-needed aid from the IMF and Western countries.
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