Accounting clerks are responsible for reviewing and maintaining accounting records. They enter balances and calculate interest on loans, bank accounts and credit accounts using accounting spreadsheets and databases. They must also review invoices and reconcile account statements, investigate any discrepancies and generate financial reports. Accounting clerks work for all different types of businesses, and their tasks tend to be more specialized with larger companies that employ large accounting departments. Their duties often include providing assistance to a Certified Public.