ALLSTATE CORP

2024 Form 10-KProperty-Liability

Property-Liability Operations

Overview Property-Liability operations consist of two reportable segments: Allstate Protection and Run-off Property-Liability. These segments are consistent with the groupings of financial information that management uses to evaluate performance and to determine the allocation of resources.

We do not allocate Property-Liability investment income, net gains and losses on investments and derivatives, or assets to the Allstate Protection and Run-off Property-Liability segments. Management reviews assets at the Property-Liability level for decision-making purposes.

GAAP operating ratios are used to measure our profitability to enhance an investor’s understanding of our financial results and are calculated as follows:

•Loss ratio: the ratio of claims and claims expense (loss adjustment expenses), to premiums earned. Loss ratios include the impact of catastrophe losses and prior year reserve reestimates.

•Expense ratio: the ratio of amortization of DAC, operating costs and expenses, amortization or impairment of purchased intangibles and restructuring and related charges, less other revenue to premiums earned.

•Combined ratio: the sum of the loss ratio and the expense ratio.

We have also calculated the following impacts of specific items on the GAAP operating ratios because of the volatility of these items between periods. The impacts are calculated by taking the specific items noted below divided by Property-Liability premiums earned:

•Effect of catastrophe losses on combined ratio: includes catastrophe losses and prior year reserve reestimates of catastrophe losses included in claims and claims expense

•Effect of prior year reserve reestimates on combined ratio

•Effect of amortization of purchased intangibles on combined ratio

•Effect of restructuring and related charges on combined ratio

•Effect of Run-off Property-Liability business on combined ratio: includes claims and claims expense, restructuring and related charges and operating costs and expenses in the Run-off Property-Liability segment

Premium measures and statistics are used to analyze our premium trends and are calculated as follows:

•PIF: policy counts are based on items rather than customers. A multi-car customer would generate multiple item (policy) counts, even if all cars were insured under one policy. Lender-placed policies are excluded from policy counts because relationships are with the lenders.

•New issued applications: item counts of automobile or homeowner insurance applications for insurance policies that were issued during the period, regardless of whether the customer was previously insured by another Allstate brand.

•Average premium-gross written (“average premium”): gross premiums written divided by issued item count. Gross premiums written include the impacts from discounts, surcharges and ceded reinsurance premiums and exclude the impacts from mid-term premium adjustments and premium refund accruals. Average premiums represent the appropriate policy term for each line.

•Implemented rate changes: represents the impact in the locations (U.S. states, the District of Columbia or Canadian provinces) where rate changes were implemented during the period as a percentage of total prior year-end premiums written.

The Allstate Corporation 39

2024 Form 10-K Property-Liability

(1)Restructuring and related charges in 2024 primarily relate to the organizational transformation component of the Transformative Growth plan. See Note 15 of the consolidated financial statements for additional details.

(2)Favorable reserve reestimates are shown in parentheses.

(3)Other revenue is deducted from operating costs and expenses in the expense ratio calculation.

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