Gross Written Premium (GWP) — the total premium (direct and assumed) written by an insurer before deductions for reinsurance and ceding commissions. In the insurance industry, gross premiums written is the sum of both direct premiums written (see next paragraph) and assumed premiums written, before. Gross net written premium income is the amount of an insurance company's premiums that are used to determine the amount of premiums. 8 days ago · A written premium is an accounting term in the insurance industry used to describe the total amount customers are required to pay for insurance. Visit the QBE Group website for a glossary of insurance terms used in the website , Annual Reports and AGM presentations. The exact definition of GWP “Gross Written Premium” is often shrouded in mystery.