Professional Indemnity insurance protects professionals and organizations from financial losses resulting from claims made by third parties due to negligent acts, errors or omissions. It covers damages, settlements and defense costs. Key components of a PI policy include coverage for the firm arising from professional duties, claims made basis, limits of indemnity, and exclusions. Common professions that purchase PI include accountants, lawyers, consultants, engineers and medical professionals. Underwriting considers factors like revenues, claims history, staff experience and largest contracts to determine risk profile and premium.