In general, € 853.00 for every month of your stay are required as a monthly blocked amount. This is the standard sum as required by the general guidelines. Please note that only your local embassy, consulate or the local alien authority can provide you with binding information on the required monthly blocked amount in your individual case.
The "additional basic sum" is an additional amount on your blocked account which only needs to be entered if your local embassy, consulate or alien authority inquires a special request! Please do not enter any "additional basic sum" without the particular request by the embassy. If you have to enter an "additional basic sum" it is just a security for the aforementioned entities. Please keep in mind that this sum remains blocked during your time in Germany.