However, with Gazprom yet to receive the money, the three sides agreed to meet again on Monday – just one day before the Russian state-controlled company had threatened to reduce supplies if Ukraine left its debts unpaid.
Günther Oettinger, EU energy commissioner, said he hoped a deal could be struck before Tuesday. "We have not yet reached a breakthrough but we have made progress," he said. "What is needed now is patience and a functioning bank in New York. Then the payment will be received on Monday morning."
The negotiations are being watched in Europe, where memories of supply disruptions in previous gas crises in 2006 and 2009 are still fresh. About 15 per cent of Europe's gas supplies are delivered via Ukraine.
Read MoreEU to Ukraine: Pay Russia for gas at a fair price
Moscow has softened its position in recent weeks, indicating it would be ready to lower prices to Ukraine from the $485 per thousand cubic metres announced by Gazprom in April. Ukraine disputes that price, which was nearly double the previous rate of $268.
However, the negotiations are set to go down to the wire. Alexei Miller, Gazprom's chief executive, this week again stated that the company's plan was to move Ukraine to a system of prepayment – with supplies being cut on Tuesday morning if no payment was made by Monday night.