The IMF granted Ukraine a second loan in 2010 but froze payments in March when Ukrainian officials wouldn't raise tariffs for household gas as a way to trim a budget deficit. In December, the government said it could get relief if Russian energy company Gazprom lowered the prices it charges for Ukraine.
Barbara Nestor, a market strategist at Commerzbank in London, told Bloomberg News that Ukraine needs to take action as its economy slows.
"To get through the year, the government must agree on a lower gas price, sell assets or do a deal with the IMF," she was quoted as saying.
Last week, the Ukrainian government said it needs to get a better deal from Russia or meet IMF demands for a 30 percent hike in domestic tariffs.
If it can't get an IMF deal, "the government will have to continue depleting its limited foreign-currency reserves to meet its external debt obligations," said Liza Ermolenko, an emerging-markets economist at Capital Economics Ltd. in London.