The figure was revealed as the country unveiled its budget for next year.
But it said debt should fall back in 2015, and repeated its aim to bring the public deficit below 3% that year, the EU’s deadline for doing so.
The government also said there will be some tax increases for households, but other tax reductions for businesses.
In addition, the budget focuses on tightening public spending, with some 15bn euros (£12.6bn) in savings planned, as part of a plan to cut some 18bn euros off the deficit.
But debt servicing costs will rise to 46.7bn euros, compared with 45bn euros in 2013.
The 2014 budget is based on a growth forecast of 0.9%, lowered from a previous 1.2% forecast, with just 0.1% in growth forecast for this year.
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