David Cameron faces more months of tough negotiations as he tries to secure a seven-year freeze in the European Union budget after this week's summit broke up without a deal.
The prime minister warned Europe it must live in the "real world" after talks at the Brussels gathering collapsed and said the offer on the table was "just not good enough", the Press Association reported.
Another summit will now be held in the New Year, by which time the EU's 27 members will hope to have narrowed their differences enough to strike an agreement in January or February.
At a post-summit press conference on Friday, Mr Cameron hit out at eurocrats for failing to come up with even a "single euro" in savings from their own pay and perks regime.
The EU's leaders abandoned their talks on the second day in Brussels when it became clear that the gaps between national demands over spending priorities were too wide.
But Mr Cameron was far from isolated in seeking "at worst a freeze, at best a cut" in the EU's spending levels for 2014-2020.
As the talks began, the leaders were looking at a seven-year budget "envelope" of £756 billion for 2014-2020 - a reduction of £48bn in what the European Commission wanted.
It was also nearly £3.8bn lower than the budget ceiling in the previous 2007-2013 seven-year spending deal.
But Downing Street said that previous ceiling was never reached, so the "cut" is in real terms, not a saving.
Mr Cameron wanted to see another €25bn or more shaved off the total, but a revised compromise on Friday kept the same total but shuffled spending figures around within it.
Rebuffed on the size of the budget, unable to win even symbolic reduction in eurocrats' salaries and pensions, and still facing a threat to the UK's rebate from proposed changes, Mr Cameron joined German chancellor Angela Merkel in preferring to call time on the talks rather than sit in Brussels all weekend getting nowhere.
Others agreed, although poorer central European countries benefiting most from a bigger budget were prepared to stay on, judging that a postponement will almost certainly mean a budget adjustment downwards when the talks resume.
Asked about France defending higher agriculture subsidies - the farm vote is crucial in France - Mr Cameron said: "I don't think it is particularly helpful to point the finger of blame at countries coming here to defend their national interests.
"One of the problems has been: who is here to stand up for taxpayers? Which institution is there to say: where's the money coming from? Who is going to pay for it?"
He insisted the UK was being listened to, and he rejected Labour claims that he was isolated in Europe.
He said: "Any attempts there might have been to put Britain in a box and do a deal without them didn't work."
Summit chairman Herman Van Rompuy insisted after the talks broke up that the negotiations had been constructive and that there had been "a sufficient degree of potential convergence" to make an agreement possible early next year.
European Commission president Jose Manuel Barroso said the talks had been "extraordinarily complex and difficult" but also constructive.
He said: "For the first time ever in the EU's history we are discussing real cuts, and not an increase in the budget.
"Apart from discussing the quantity, the overall amounts and other matters, it is important also to focus on quality - the quality of the finished product."
He said the "overriding goal" was to modernise the EU budget to increase its impact on creating growth and jobs.
"We will continue to defend the rationale of our approach. We need a budget that will allow the EU to live up to its responsibilities at home and abroad for the next seven years," he said.
"Of course, we also know that in the end everyone needs to compromise, so that everyone can find themselves in the deal.
"I believe that in the coming weeks, progress can be achieved and of course we will work to build the bridges needed to get an agreement in time."