Expense Ratio: A measure of profitability used by an insurance company to indicate how well it is performing in its daily operations. The expense ratio is calculated by taking the operating expenses and then dividing them by earned premium. Calculated as: (Total Operating Expenses - Underwriting Losses Total) / Net Premiums Earned

The Hanover Insurance Group, Inc. (THG) had Expense Ratio of 0.33 for the most recently reported fiscal year, ending 2024-12-31.