Annual audits
Auditing annual financial statements and consolidated financial statements
(German Commercial Code, IAS & IFRS) both voluntary and as required by law
Annual audits for public corporations 
Audits in accordance with Section 53, Budgetary Principles Act

Special audits
Formation audits 
System and process audits
Internal audits
Audits of Internal Control System (ICS) 
Credit rating checks 
Subsidy audits
Special audits