INTERNATIONAL BANCSHARES CORP
For the period ended Dec 31, 2025. Filed Feb 26, 2026.
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FY2025 · Filed Feb 26, 2026
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EX-13 · Allowance for Credit Losses
Allowance for Credit Losses
As described in Note 4 of the consolidated financial statements, the Company established an allowance for credit losses totaling $159,174,000 as of December 31, 2025. The allowance for credit losses is derived from 1) a loss-rate methodology that measures lifetime losses on loan pools that have similar risk characteristics; and 2) estimated losses on individually evaluated loans that do not have similar risk characteristics. The segmentation of the loan portfolio into pools requires a balancing process between capturing similar risk characteristics and sufficient loss history to provide relevant results. Loan pools are further broken down using a risk-based segmentation based on internal classifications of credit
quality. Within each loan pool, the lifetime historical loss-rate is evaluated and, if needed, is supplemented with peer loss rates through a model risk adjustment. Certain qualitative factors are applied at the loan pool level to incorporate management’s two-year forecast period followed by a reversion to the pool’s average lifetime loss-rate. Those qualitative factors include: (i) trends in portfolio volume and composition, (ii) volume and trends in classified loans, delinquencies, non-accruals and troubled loan modifications (TLM’s), (iii) concentration risk, (iv) trends in underlying collateral value, (v) changes in policies, procedures, and strategies, (vi) economic conditions, and (vii) operational and other risk factors to capture potential losses arising from fraud, natural disasters, pandemics, geopolitical events and large loans.
We identified the qualitative factor component of the allowance for credit losses as a critical audit matter. Auditing management’s estimate of the qualitative factors required a high degree of auditor judgment due to the nature of the adjustments and the subjectivity in judgments applied by management in forming them.
Our audit procedures related to the Company’s qualitative factors included, the following, among others:
| ● | We obtained an understanding of the relevant controls related to the allowance for credit losses, including the qualitative factors, and tested such controls for design and operating effectiveness, including controls related to management’s review of the qualitative factors and approval of the allowance for credit losses calculation. |
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| ● | We evaluated the appropriateness and consistency of management’s methods and assumptions used to determine qualitative factors by (1) evaluating management’s identification and quantification of qualitative factors; (2) testing the completeness and accuracy of data and information used in calculating the components of the qualitative factors; (3) evaluating the reasonableness, directional consistency, and magnitude of the quantification of the qualitative factors; and (4) reviewing subsequent events and considering their impact on judgments applied in forming the qualitative factor component of the allowance for credit losses as of the consolidated balance sheet date. |
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