Tax Receivable Agreement	3 Months Ended
Mar. 31, 2026
Income Tax Disclosure [Abstract]
Tax Receivable Agreement	Tax Receivable Agreement In connection with the IPO and Corporate Reorganization, the Company entered into the Tax Receivable Agreement (“TRA”) with Legence Parent and Legence Parent II (the “TRA Members”), which are related parties. The TRA generally provides for the payment by the Company to the TRA Members of 85% of the net cash tax savings, if any, in U.S. federal, state and local income tax the Company realizes, or is deemed to realize, as a result of the Company’s (i) allocable share of existing tax basis acquired in connection with the IPO and increases to such allocable share of existing tax basis; (ii) the utilization of certain tax attributes of the blocker entities that became subsidiaries of the Company pursuant to the Corporate Reorganization; (iii) increases in tax basis resulting from future redemptions or exchanges (or deemed exchanges in certain circumstances) of Legence Holdings LGN B Units for Class A Common Stock or cash and certain distributions (or deemed distributions) by Legence Holdings pursuant to the Exchange Agreement; and (iv) certain additional tax benefits arising from payments made under the TRA. The annual tax benefits are computed on a with and without basis by calculating the income taxes due including such tax benefits, and the income taxes due without such benefits. The Company retains the benefit of the remaining 15% of these cash savings, if any. Payments under the TRA are not conditioned upon any continued ownership interest in Legence Holdings or the Company. On January 8, 2026, the underwriters fully exercised their 30-day overallotment option related to the secondary offering completed on December 16, 2025. The exchange resulted in an increase to the TRA liability of $9.8 million. The exercise of the overallotment option and the impact on future TRA payments resulted in an increase to net deferred tax assets of $4.7 million. The net impact is a decrease to Additional paid-in capital of $5.1 million. Refer to “Note 10—Stockholders' Equity” for additional information. The TRA liability is classified as current or long term based on the expected date of payment. As of March 31, 2026, the current portion of the TRA liability is $8.2 million and is included in Accrued and other current liabilities on the Condensed Consolidated Balance Sheet.

In connection with the IPO and Corporate Reorganization, the Company entered into the Tax Receivable Agreement (“TRA”) with Legence Parent and Legence Parent II (the “TRA Members”), which are related parties. The TRA generally provides for the payment by the Company to the TRA Members of 85% of the net cash tax savings, if any, in U.S. federal, state and local income tax the Company realizes, or is deemed to realize, as a result of the Company’s (i) allocable share of existing tax basis acquired in connection with the IPO and increases to such allocable share of existing tax basis; (ii) the utilization of certain tax attributes of the blocker entities that became subsidiaries of the Company pursuant to the Corporate Reorganization; (iii) increases in tax basis resulting from future redemptions or exchanges (or deemed exchanges in certain circumstances) of Legence Holdings LGN B Units for Class A Common Stock or cash and certain distributions (or deemed distributions) by Legence Holdings pursuant to the Exchange Agreement; and (iv) certain additional tax benefits arising from payments made under the TRA. The annual tax benefits are computed on a with and without basis by calculating the income taxes due including such tax benefits, and the income taxes due without such benefits. The

On January 8, 2026, the underwriters fully exercised their 30-day overallotment option related to the secondary offering completed on December 16, 2025. The exchange resulted in an increase to the TRA liability of $9.8 million. The exercise of the overallotment option and the impact on future TRA payments resulted in an increase to net deferred tax assets of $4.7 million. The net impact is a decrease to Additional paid-in capital of $5.1 million. Refer to “Note 10—Stockholders' Equity” for additional information.

The TRA liability is classified as current or long term based on the expected date of payment. As of March 31, 2026, the current portion of the TRA liability is $8.2 million and is included in Accrued and other current liabilities on the Condensed Consolidated Balance Sheet.