With Eurostat figures also showing euro zone unemployment at a record 11.7 percent of the working population in December, the ECB appears to have room to lower rates again to stimulate an economy that has slipped into its second recession since 2009.
"Inflation is non-existent," said Thomas Costerg, an economist at Standard Chartered in London. "Now with German inflation decelerating, that will fuel debate about how the ECB will ease policy," he said, forecasting a cut in the ECB's main refinancing rate in the second quarter.
For the past year, inflation has been driven by oil prices and tax increases, but stripping out those factors, annual consumer price rises are around 1 percent, reflecting the weakness of the economy.
The ECB's governing council kept rates at 0.75 percent at its January meeting and will discuss rate policy again on Feb. 7. The decision to keep policy on hold was unanimous last month, but economists are still divided over the ECB's future moves.
Thirty-eight out of 73 analysts polled in January by Reuters said the ECB will remain on hold in the first quarter. None expected a rate cut next week.
A stronger euro, which rose to a 14-month peak on Friday, could also dampen the export-led economic recovery and potentially support the case for a rate cut.
"You have to wonder whether this will lead to a reaction from the ECB next week," said Nick Kounis, a senior economist at ABN AMRO in Amsterdam.
An third consecutive improvement in euro zone business morale in January and better factory output suggest the bloc has passed the worst of its recession, however, meaning further ECB stimulus in the form of lower borrowing costs may not be needed.
The ECB's task is also complicated by a divide between wealthier, northern countries which are showing signs of emerging from the euro zone's three-year-old debt crisis, and countries such as Spain and Italy that are in deep recession.
Stark differences between euro zone countries' ability to borrow also raises questions about the value of a rate cut. ECB President Mario Draghi said late last year that monetary policy is already "very accommodative."
Growing Job Lines
The divergence in fortunes of euro zone economies is evident not just in their ability to fund themselves, but in the rates of joblessness seen across the bloc of 330 million people.
Highlighting the human cost of a debt crisis that began in 2009 in Greece and spread to the euro zone's biggest economies, some 18.7 million people were out of work in December, an unemployment rate of 11.7 percent. That figure has risen from below 8 percent in early 2008, just before the full effects of the global financial crisis were fully felt, and is well above 11.3 percent forecast by the European Commission for end-2012.
Unemployment held steady at just 5.3 percent in Germany, the euro zone's biggest economy, however but rose again in Portugal and Cyprus, to 16.5 percent and 14.7 percent respectively.
Greece holds the record in both the euro zone and the wider European Union for worklessness, with a rate of 26.8 percent in October, the latest figure available. The unemployment rate in Spain fell slightly to 26.1 percent in December.
Even as the economy appears to have hit bottom, the number of those out of work is expected to rise in coming months, employment expectations in the latest Commission survey suggest.
"We would still expect the jobless rate to breach 12 percent later this year," said Martin van Vliet, an economist at ING.