Germany is sticking with a cautious economic growth forecast of 0.7% according to reports.
It expects the rate, however, to more than double to 1.6% in 2013, according to a government source quoted by the Reuters news agency.
Economy Minister Philipp Roesler is due to officially unveil the figures on Wednesday.
The numbers match an outlook published in January in the government's annual economic report and reflect persistent weakness in Germany's euro zone partner countries.
Last week, the country's top economic institutes revised up forecasts for Europe's biggest economy, pencilling in 0.9% growth this year and then 2.0 percent in 2013.
The institutes, which advise the government on economic policy, had previously said Germany would grow 0.8% this year. It was their first forecast for 2013.
