Mortgage credit interest rate, percent in Germany, February, 2019: For that indicator, Deutsche Bundesbank provides data for Germany from 2003 to 2019. The average value for Germany during that period was 3.51 percent with a minumum of 1.62 percent in October 2016 and a maximum of 5.48 percent in August 2008. Click on the following link to see the values of Mortgage credit interest rate, percent around the world.