Everus Construction Group, Inc.

Note 10 –Income Taxes

The Company’s quarterly income tax provision is measured using an estimate of its consolidated annual effective tax rate, adjusted in the current period for discrete income tax items, within the periods presented.

For the three months ended March 31, 2026, income tax expense was $20.3 million, resulting in an effective tax rate of 25.8%. The effective tax rate for the three months ended March 31, 2026 differed from the 2026 statutory tax rate of 21% primarily due to state income taxes, net of federal income taxes, and certain unfavorable permanent book-tax differences due to meals and entertainment expenses and non-deductible employee compensation, partially offset by increased research & development tax credits.

For the three months ended March 31, 2025, income tax expense was $13.6 million, resulting in an effective tax rate of 27.0%. The effective tax rate for the three months ended March 31, 2025 differed from the 2025 statutory tax rate of 21% primarily due to state income taxes, net of federal income taxes, and certain unfavorable permanent book-tax differences due to meals and entertainment expenses and non-deductible employee compensation.

The effective tax rate for the three months ended March 31, 2026 differed from the effective tax rate for the three months ended March 31, 2025 due to changes in the Company’s permanent book-tax differences between those periods, specifically changes in the Company’s state income taxes and increased non-deductible employee compensation, partially offset by a favorable stock compensation book-tax difference.