1. A computer system for administration of payroll-related insurance transactions, comprising: a system access module configured to authenticate a user from a client device; a data access module configured to, responsive to a request from the authenticated user via the client device, accessing from an insurance company database payroll-related insurance data of an employer associated with the authenticated user, said data including cost data at an employee level and occupation codes associated with employee; a processing module configured to identify, based on the accessed employee data, employees lacking an associated occupation classification code; and a presentation module configured to furnish, for display on a client device: insurance cost data at an employee level; an occupation code form listing each of the employees identified as lacking an associated occupation classification code and a user prompt for an occupation classification code, and for receiving classification codes from the user; and a fillable form prompting the user to provide payroll data, the payroll data including employee geographic data, occupation classification and gross amount paid; to receive classification codes and payroll data from the client device, and to furnish received classification codes and payroll data to the processing module; wherein the processing module is further for furnishing received payroll data and classification codes to the insurance company database.