Summary of Significant Accounting Policies	12 Months Ended
Dec. 31, 2025
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Principles of Consolidation We consolidate variable interest entities (“VIE”), in which we are considered the primary beneficiary. The primary beneficiary is the entity that has (i) the power to direct the activities that most significantly impact the entity’s economic performance, and (ii) the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could be significant to the VIE. As of December 31, 2025 and 2024, the AIR Operating Partnership consolidated four VIE. Please see Note 12 for further discussion regarding our consolidated VIE. Real Estate Acquisitions Upon the acquisition of real estate, we determine whether the purchase qualifies as an asset acquisition or meets the definition of an acquisition of a business. We generally recognize the acquisition of apartment communities or interests in partnerships that own communities at our cost, including the related transaction costs, as asset acquisitions. We allocate the cost of apartment communities acquired based on the relative fair value of the assets acquired and liabilities assumed. The fair value of these assets and liabilities is determined using valuation techniques that rely on Level 2 and Level 3 inputs within the fair value framework. We determine the fair value of tangible assets, such as land, buildings, furniture, fixtures, and equipment using valuation techniques that consider comparable market transactions, replacement costs, and other available information. We determine the fair value of identified intangible assets or liabilities, which typically relate to in-place leases, using valuation techniques that consider the terms of the in-place leases, current market data for comparable leases, and our experience in leasing similar communities. The intangible assets or liabilities related to in-place leases are comprised of: (a) the value of the above- and below-market leases in-place, measured over the period, including probable lease renewals for below-market leases, that the leases are expected to remain in effect; (b) the estimated unamortized portion of avoided leasing commissions and other costs that ordinarily would be incurred to originate the in-place leases; and (c) the value associated with leased apartment homes during an estimated absorption period, which estimates rental revenue that would not have been earned had leased apartment homes been vacant at the time of acquisition, assuming lease-up periods based on market demand and stabilized occupancy levels. The above- and below-market lease intangibles are amortized to rental revenue over the expected remaining terms of the associated leases, which include reasonably assured renewal periods. Other intangible assets related to in-place leases are amortized to depreciation and amortization over the expected remaining terms of the associated leases. Capital Additions We capitalize costs incurred in connection with our capital additions activities, such as tangible improvements to an apartment community and replacements of existing apartment community components. Certain indirect costs related to these activities are also capitalized. Routine repairs, maintenance, and resident turnover costs are expensed as incurred and recorded in property operating expenses. For the years ended December 31, 2025, 2024, and 2023, we capitalized to buildings and improvements $6.7 million, $13.3 million, and $16.2 million of indirect costs, respectively. Dispositions A property is classified as held for sale when all of the following criteria for a plan of sale have been met: (i) management, having the authority to approve the action, commits to a plan to sell the asset or disposal group; (ii) the asset or disposal group is available for immediate sale in its present condition, subject only to terms that are usual and customary; (iii) an active program to locate a buyer and other actions required to complete the plan to sell the asset or disposal group have been initiated; (iv) the sale of the asset or disposal group is probable and is expected to be completed within one year; (v) the asset or disposal group is being actively marketed for sale at a price that is reasonable in relation to its current fair value; and (vi) actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn, which is typically indicated by receipt of all non-refundable deposits from the buyer pursuant to a sales contract. Depreciation of assets ceases upon designation of a property as held for sale. For sales of real estate, we evaluate whether the disposition represents a strategic shift that has, or will have, a major effect on our operations and financial results. If so, it is classified as discontinued operations in our consolidated financial statements for all periods presented. If not, it is presented in continuing operations in our consolidated financial statements. The disposal of an individual property generally will not represent a strategic shift that has a major effect, and therefore will typically not meet the criteria for classification as a discontinued operations. Gain or loss on real estate dispositions are recognized when we no longer hold a controlling financial interest in the real estate and sufficient consideration has been received. Upon disposition, the related assets and liabilities are derecognized, and the gain or loss on disposition is recognized as the difference between the carrying amount of those assets and liabilities and the value of consideration received. Impairment Real estate and other long-lived assets to be held and used are individually evaluated for impairment when conditions exist that may indicate the carrying amount of a long-lived asset may not be recoverable. We use the held for sale impairment model for properties classified as held for sale, whereby an impairment charge is recognized if the carrying amount of the long-lived asset classified as held for sale exceeds its fair value less cost to sell. If an impairment indicator exists, we compare the asset’s expected future undiscounted cash flows to its current carrying value to assess whether impairment measurement is necessary. Upon determination that an impairment has occurred, we recognize an impairment loss to the extent the carrying amount exceeds the estimated fair value of the real estate and other long-lived assets. The measurement of impairment is based on the fair value of the community and incorporates various estimates, assumptions, and market data, the most significant being rental rates, operating expense assumptions, expected hold period, capitalization rate, and purchase and sale agreements. We project future rental revenue growth rates using forecasted rates from third-party market research analytics. Property expense growth rates and capitalization rates are based on the apartment communities’ historical, current, and expected future operating results, existing operating expense assumptions, and operational strategies. These projections are adjusted to reflect current economic conditions and require considerable management judgment. We did not recognize any such impairment during the years ended December 31, 2025 and 2024. During 2023, we recognized a non-cash impairment loss on real estate of $23.6 million. Cash and Cash Equivalents We classify highly liquid investments with an original maturity of three months or less as cash equivalents. We maintain cash equivalents in financial institutions in excess of insured limits. We have not experienced any losses in these accounts in the past and believe that we are not exposed to significant credit risk because our accounts are deposited with major financial institutions. Restricted Cash As of December 31, 2025 and 2024, restricted cash primarily consists of capital replacement reserves, real estate tax and insurance escrow accounts held by lenders, and resident security deposits. Goodwill As of December 31, 2025 and 2024, goodwill associated with our reportable segment totaled $32.3 million. We perform an impairment test of goodwill annually, or when an interim triggering event occurs, by evaluating qualitative and quantitative factors, if necessary, to determine the likelihood that goodwill may be impaired. As a result of our annual impairment test, we determined that our goodwill was not impaired during the years ended December 31, 2025, 2024, and 2023. Investment in Unconsolidated Real Estate Partnerships We may own general and limited partner interests in partnerships that either directly, or through interests in other real estate partnerships, own apartment communities. We account for investments in real estate partnerships that we do not consolidate under the equity method. Under the equity method, we recognize our share of the earnings or losses of the entity for the periods presented, inclusive of our share of any impairments and disposition gains or losses recognized by and related to such entities, and we present such amounts within loss from unconsolidated real estate partnerships in our consolidated statements of operations. Investment in unconsolidated real estate partnerships is included as a separate line item in our consolidated balance sheets. Investments in unconsolidated real estate partnerships are reviewed for impairments. An impairment loss is recorded when there is a decline in the fair value below the carrying value and we conclude such decline is other-than-temporary. An impairment loss is measured based on the excess of the carrying amount of an investment over its estimated fair value. We determine the fair value of investments in unconsolidated real estate partnerships using valuation techniques that consider the terms of the in-place leases, current market data for comparable leases, our experience in leasing similar communities, and current plans. We recognized no such impairments for the years ended December 31, 2025, 2024, and 2023. The excess of our cost of the acquired partnership interests over our share of the partners’ equity or deficit are included as a part of our investments in unconsolidated real estate partnerships. We amortize the excess cost over the term of the joint venture agreement. The amortization is recorded as an adjustment of the amounts of earnings or losses we recognize from such unconsolidated real estate partnerships. Please see Note 6 for further discussion regarding our investment in unconsolidated real estate partnerships. Noncontrolling Interests in Consolidated Real Estate Partnerships We report unaffiliated partners’ interests in the net assets of consolidated real estate partnerships as noncontrolling interests within the consolidated statements of partners’ capital (deficit). If a partnership includes redemption rights outside the AIR Operating Partnership’s control, the related noncontrolling interest is classified as temporary equity. Assets of consolidated partnerships must first be used to settle their own liabilities, and creditors of these partnerships have no recourse to the general credit of the AIR Operating Partnership. Noncontrolling interests in consolidated real estate partnerships primarily represent equity held by limited partners in partnerships with finite lives. We allocate income or loss to noncontrolling interests based on their proportionate share of partnership results, including losses that may create a deficit balance in partners’ capital (deficit). Partnership agreements generally require liquidation after the sale of the underlying real estate. As general partner, we typically control the timing of sales and other events that trigger liquidation, redemption, or settlement of noncontrolling interests. Changes in our ownership interest generally result from purchasing additional interests or selling all or part of our interest in a consolidated partnership. Purchases during the years ended December 31, 2025, 2024, and 2023, are reflected in the consolidated statements of partners’ capital (deficit), while sales and related real estate dispositions are reported as gains or losses in the consolidated statements of operations, with corresponding allocations to us and noncontrolling interests. Upon deconsolidation, whether through sale of our interest or liquidation following a property sale, we remove any remaining noncontrolling interest from our consolidated balance sheets. Noncontrolling Interests in the AIR Operating Partnership Noncontrolling interests in the AIR Operating Partnership consist of common OP Units held by limited partners and preferred OP Units. Holders of preferred OP Units participate in the AIR Operating Partnership’s income or loss only to the extent of their preferred distributions. The AIR Operating Partnership’s income or loss is allocated to the holders of common OP Units based on the weighted-average number of common OP Units outstanding during the period. During the years ended December 31, 2025, 2024, and 2023, common OP Units held by limited partners had a weighted-average economic ownership interest in the AIR Operating Partnership of 4.66%, 6.14%, and 6.37%, respectively. Please refer to Note 8 for further information regarding the items comprising noncontrolling interests in the AIR Operating Partnership. Revenue from Leases We are a lessor primarily for residential leases. Our operating leases with residents may also provide that the resident reimburse us for certain costs, primarily the resident’s share of utilities expenses, incurred by the apartment community. These reimbursements represent revenue attributable to nonlease components for which the timing and pattern of recognition is the same as the revenue for the lease components. We use the practical expedient that allows us to account for the lease and nonlease components as a single component. Reimbursement and related expense are presented on a gross basis in our consolidated statements of operations, with the reimbursement included in rental and other property revenues attributable to real estate in our consolidated statements of operations. We recognize rental revenue attributed to lease components, net of any concessions, on a straight-line basis over the term of the lease. Insurance We believe our insurance programs provide adequate coverage for our apartment communities against risks of loss from fire, earthquake, hurricane, tornado, flood, and other perils. In addition, we maintain third-party insurance coverage (after self-insured retentions) that defray the costs of large workers’ compensation, health, and general liability exposures. We accrue losses based upon our estimates of the aggregate liability for uninsured losses incurred using certain actuarial assumptions followed in the insurance industry and based on historical experience. Depreciation and Amortization Depreciation for all tangible assets is calculated using the straight-line method over their estimated useful life. Acquired buildings and improvements are depreciated over a useful life based on the age, condition, and other physical characteristics of the asset. Furniture, fixtures, and equipment are generally depreciated over five years. We depreciate capitalized costs using the straight-line method over the estimated useful life of the related improvement, which is generally 5, 15, or 30 years. Purchased software and other costs related to software purchased or developed for internal use are capitalized during the application development stage and are amortized using the straight-line method over the estimated useful life of the software, generally three to ten years. Purchased equipment is recognized at cost and depreciated using the straight-line method over the estimated useful life of the asset, which is generally five years. Leasehold improvements are also recorded at cost and depreciated on a straight-line basis over the shorter of the asset’s estimated useful life or the term of the related lease. Certain homogeneous items that are purchased in bulk on a recurring basis, such as appliances, are depreciated using group methods that reflect the average estimated useful life of the items in each group. Normal replacements of apartment community components are considered in determining estimated useful life under composite and group depreciation method; therefore, we generally do not recognize losses upon replacement. Exceptions occur in casualty events, where the net book value of the lost asset is written off in the determination of casualty gains or losses. Share-Based Compensation As a result of the Merger, we no longer issue share-based compensation. As of December 31, 2025, there are 2,562,284 vested LTIP II units outstanding at a weighted-average grant date fair value of $9.51 per unit. Related Party Transactions Commencing in 2025, the AIR Operating Partnership began to provide property management and corporate services to apartment communities affiliated with Blackstone. For the year ended December 31, 2025, we recognized approximately $2.5 million in Other revenues for property management services provided to these affiliates. Corporate services consist of administrative expenses incurred by AIR that are billed back to affiliated managed properties. For the year ended December 31, 2025, we recouped $2.1 million of corporate services in General and administrative expenses. As of December 31, 2025, $2.3 million represents amounts due from affiliates presented within Other assets, net in our consolidated balance sheet. Income Taxes The AIR Operating Partnership is a partnership for federal income tax purposes and as such is not subject to federal income tax. The state and local tax laws may not conform to the United States federal income tax treatment, and AIR Operating Partnership may be subject to state or local taxation in various state or local jurisdictions, including those in which we transact business. Any taxes imposed on us reduce our operating cash flow and net income (loss). Certain operations, including certain property management and risk management activities, are conducted through taxable REIT subsidiaries, which are subsidiaries of the AIR Operating Partnership, and each of which we refer to as a TRS. A TRS is a corporate subsidiary that has elected to be a TRS instead of a REIT and, as such, is subject to United States federal corporate income tax. We use TRS entities to facilitate our ability to offer certain services and activities to our residents and investment partners that cannot be offered directly by a REIT. For TRS entities, deferred income taxes arise from temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts reported for United States federal income tax purposes, and are measured using the enacted tax rates and laws that are expected to be in effect when the differences reverse. We reduce deferred tax assets by recording a valuation allowance when we determine, based on available evidence, that it is more likely than not that the assets will not be realized. We recognize the tax consequences associated with intercompany transfers between the AIR Operating Partnership and TRS entities when such transactions occur. No material deferred tax assets or liabilities have been recognized as of the balance sheet date, and detailed tabular disclosures are not presented due to the insignificance of reported tax expense. Earnings per Unit We calculate earnings per unit based on the weighted-average number of common OP Units, common unit equivalents, and dilutive convertible securities outstanding during the period. The AIR Operating Partnership considers both common OP Units and equivalents, which have identical rights to distributions and undistributed earnings, to be common units for purposes of the earnings per unit computations. Please refer to Note 9 for further information regarding earnings per unit computations. Use of Estimates The preparation of our consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts included in the consolidated financial statements and accompanying notes thereto. Actual results could differ from those estimates. Accounting Pronouncements Recently Issued Accounting standards that have been issued by the Financial Accounting Standards Board, or other standards-setting bodies, that are not yet effective are not expected to have a material impact on our consolidated financial statements upon adoption.

We consolidate variable interest entities (“VIE”), in which we are considered the primary beneficiary. The primary beneficiary is the entity that has (i) the power to direct the activities that most significantly impact the entity’s economic performance, and (ii) the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could be significant to the VIE. As of December 31, 2025 and 2024, the AIR Operating Partnership consolidated four VIE. Please see Note 12 for further discussion regarding our consolidated VIE.

Upon the acquisition of real estate, we determine whether the purchase qualifies as an asset acquisition or meets the definition of an acquisition of a business. We generally recognize the acquisition of apartment communities or interests in partnerships that own communities at our cost, including the related transaction costs, as asset acquisitions.

We allocate the cost of apartment communities acquired based on the relative fair value of the assets acquired and liabilities assumed. The fair value of these assets and liabilities is determined using valuation techniques that rely on Level 2 and Level 3 inputs within the fair value framework. We determine the fair value of tangible assets, such as land, buildings, furniture, fixtures, and equipment using valuation techniques that consider comparable market transactions, replacement costs, and other available information. We determine the fair value of identified intangible assets or liabilities, which typically relate to in-place leases, using valuation techniques that consider the terms of the in-place leases, current market data for comparable leases, and our experience in leasing similar communities.

The intangible assets or liabilities related to in-place leases are comprised of: (a) the value of the above- and below-market leases in-place, measured over the period, including probable lease renewals for below-market leases, that the leases are expected to remain in effect; (b) the estimated unamortized portion of avoided leasing commissions and other costs that ordinarily would be incurred to originate the in-place leases; and (c) the value associated with leased apartment homes during an estimated absorption period, which estimates rental revenue that would not have been earned had leased apartment homes been vacant at the time of acquisition, assuming lease-up periods based on market demand and stabilized occupancy levels. The above- and below-market lease intangibles are amortized to rental revenue over the expected remaining terms of the associated leases, which include reasonably assured renewal periods. Other intangible assets related to in-place leases are amortized to depreciation and amortization over the expected remaining terms of the associated leases.

We capitalize costs incurred in connection with our capital additions activities, such as tangible improvements to an apartment community and replacements of existing apartment community components. Certain indirect costs related to these activities are also capitalized. Routine repairs, maintenance, and resident turnover costs are expensed as incurred and recorded in property operating expenses.

A property is classified as held for sale when all of the following criteria for a plan of sale have been met: (i) management, having the authority to approve the action, commits to a plan to sell the asset or disposal group; (ii) the asset or disposal group is available for immediate sale in its present condition, subject only to terms that are usual and customary; (iii) an active program to locate a buyer and other actions required to complete the plan to sell the asset or disposal group have been initiated; (iv) the sale of the asset or disposal group is probable and is expected to be completed within one year; (v) the asset or disposal group is being actively marketed for sale at a price that is reasonable in relation to its current fair value; and (vi) actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn, which is typically indicated by receipt of all non-refundable deposits from the buyer pursuant to a sales contract. Depreciation of assets ceases upon designation of a property as held for sale.

For sales of real estate, we evaluate whether the disposition represents a strategic shift that has, or will have, a major effect on our operations and financial results. If so, it is classified as discontinued operations in our consolidated financial statements for all periods presented. If not, it is presented in continuing operations in our consolidated financial statements. The disposal of an individual property generally will not represent a strategic shift that has a major effect, and therefore will typically not meet the criteria for classification as a discontinued operations.

Gain or loss on real estate dispositions are recognized when we no longer hold a controlling financial interest in the real estate and sufficient consideration has been received. Upon disposition, the related assets and liabilities are derecognized, and the gain or loss on disposition is recognized as the difference between the carrying amount of those assets and liabilities and the value of consideration received.

Real estate and other long-lived assets to be held and used are individually evaluated for impairment when conditions exist that may indicate the carrying amount of a long-lived asset may not be recoverable. We use the held for sale impairment model for properties classified as held for sale, whereby an impairment charge is recognized if the carrying amount of the long-lived asset classified as held for sale exceeds its fair value less cost to sell. If an impairment indicator exists, we compare the asset’s expected future undiscounted cash flows to its current carrying value to assess whether impairment measurement is necessary. Upon determination that an impairment has occurred, we recognize an impairment loss to the extent the carrying amount exceeds the estimated fair value of the real estate and other long-lived assets.

The measurement of impairment is based on the fair value of the community and incorporates various estimates, assumptions, and market data, the most significant being rental rates, operating expense assumptions, expected hold period, capitalization rate, and purchase and sale agreements. We project future rental revenue growth rates using forecasted rates from third-party market research analytics. Property expense growth rates and capitalization rates are based on the apartment communities’ historical, current, and expected future operating results, existing operating expense assumptions, and operational strategies. These projections are adjusted to reflect current economic conditions and require considerable management judgment.

We classify highly liquid investments with an original maturity of three months or less as cash equivalents. We maintain cash equivalents in financial institutions in excess of insured limits. We have not experienced any losses in these accounts in the past and believe that we are not exposed to significant credit risk because our accounts are deposited with major financial institutions.

As of December 31, 2025 and 2024, goodwill associated with our reportable segment totaled $32.3 million. We perform an impairment test of goodwill annually, or when an interim triggering event occurs, by evaluating qualitative and quantitative factors, if necessary, to determine the likelihood that goodwill may be impaired. As a result of our annual impairment test, we determined that our goodwill was not impaired during the years ended December 31, 2025, 2024, and 2023.

We may own general and limited partner interests in partnerships that either directly, or through interests in other real estate partnerships, own apartment communities. We account for investments in real estate partnerships that we do not consolidate under the equity method. Under the equity method, we recognize our share of the earnings or losses of the entity for the periods presented, inclusive of our share of any impairments and disposition gains or losses recognized by and related to such entities, and we present such amounts within loss from unconsolidated real estate partnerships in our consolidated statements of operations. Investment in unconsolidated real estate partnerships is included as a separate line item in our consolidated balance sheets.

Investments in unconsolidated real estate partnerships are reviewed for impairments. An impairment loss is recorded when there is a decline in the fair value below the carrying value and we conclude such decline is other-than-temporary. An impairment loss is measured based on the excess of the carrying amount of an investment over its estimated fair value. We determine the fair value of investments in unconsolidated real estate partnerships using valuation techniques that consider the terms of the in-place leases, current market data for comparable leases, our experience in leasing similar communities, and current plans. We recognized no such impairments for the years ended December 31, 2025, 2024, and 2023.

The excess of our cost of the acquired partnership interests over our share of the partners’ equity or deficit are included as a part of our investments in unconsolidated real estate partnerships. We amortize the excess cost over the term of the joint venture agreement. The amortization is recorded as an adjustment of the amounts of earnings or losses we recognize from such unconsolidated real estate partnerships. Please see Note 6 for further discussion regarding our investment in unconsolidated real estate partnerships.

We report unaffiliated partners’ interests in the net assets of consolidated real estate partnerships as noncontrolling interests within the consolidated statements of partners’ capital (deficit). If a partnership includes redemption rights outside the AIR Operating Partnership’s control, the related noncontrolling interest is classified as temporary equity.

Noncontrolling interests in consolidated real estate partnerships primarily represent equity held by limited partners in partnerships with finite lives. We allocate income or loss to noncontrolling interests based on their proportionate share of partnership results, including losses that may create a deficit balance in partners’ capital (deficit).

Partnership agreements generally require liquidation after the sale of the underlying real estate. As general partner, we typically control the timing of sales and other events that trigger liquidation, redemption, or settlement of noncontrolling interests.

Changes in our ownership interest generally result from purchasing additional interests or selling all or part of our interest in a consolidated partnership. Purchases during the years ended December 31, 2025, 2024, and 2023, are reflected in the consolidated statements of partners’ capital (deficit), while sales and related real estate dispositions are reported as gains or losses in the consolidated statements of operations, with corresponding allocations to us and noncontrolling interests. Upon deconsolidation, whether through sale of our interest or liquidation following a property sale, we remove any remaining noncontrolling interest from our consolidated balance sheets.

Noncontrolling interests in the AIR Operating Partnership consist of common OP Units held by limited partners and preferred OP Units. Holders of preferred OP Units participate in the AIR Operating Partnership’s income or loss only to the extent of their preferred distributions. The AIR Operating Partnership’s income or loss is allocated to the holders of common OP Units based on the weighted-average number of common OP Units outstanding during the period. During the years ended December 31, 2025, 2024, and 2023, common OP Units held by limited partners had a weighted-average economic ownership interest in the AIR Operating Partnership of 4.66%, 6.14%, and 6.37%, respectively. Please refer to Note 8 for further information regarding the items comprising noncontrolling interests in the AIR Operating Partnership.

We are a lessor primarily for residential leases. Our operating leases with residents may also provide that the resident reimburse us for certain costs, primarily the resident’s share of utilities expenses, incurred by the apartment community. These reimbursements represent revenue attributable to nonlease components for which the timing and pattern of recognition is the same as the revenue for the lease components. We use the practical expedient that allows us to account for the lease and nonlease components as a single component. Reimbursement and related expense are presented on a gross basis in our consolidated statements of operations, with the reimbursement included in rental and other property revenues attributable to real estate in our consolidated statements of operations. We recognize rental revenue attributed to lease components, net of any concessions, on a straight-line basis over the term of the lease.

We believe our insurance programs provide adequate coverage for our apartment communities against risks of loss from fire, earthquake, hurricane, tornado, flood, and other perils. In addition, we maintain third-party insurance coverage (after self-insured retentions) that defray the costs of large workers’ compensation, health, and general liability exposures. We accrue losses based upon our estimates of the aggregate liability for uninsured losses incurred using certain actuarial assumptions followed in the insurance industry and based on historical experience.

Depreciation for all tangible assets is calculated using the straight-line method over their estimated useful life. Acquired buildings and improvements are depreciated over a useful life based on the age, condition, and other physical characteristics of the asset. Furniture, fixtures, and equipment are generally depreciated over five years.

Purchased software and other costs related to software purchased or developed for internal use are capitalized during the application development stage and are amortized using the straight-line method over the estimated useful life of the software, generally three to ten years. Purchased equipment is recognized at cost and depreciated using the straight-line method over the estimated useful life of the asset, which is generally five years. Leasehold improvements are also recorded at cost and depreciated on a straight-line basis over the shorter of the asset’s estimated useful life or the term of the related lease.

Certain homogeneous items that are purchased in bulk on a recurring basis, such as appliances, are depreciated using group methods that reflect the average estimated useful life of the items in each group. Normal replacements of apartment community components are considered in determining estimated useful life under composite and group depreciation method; therefore, we generally do not recognize losses upon replacement. Exceptions occur in casualty events, where the net book value of the lost asset is written off in the determination of casualty gains or losses.

Commencing in 2025, the AIR Operating Partnership began to provide property management and corporate services to apartment communities affiliated with Blackstone. For the year ended December 31, 2025, we recognized approximately $2.5 million in Other revenues for property management services provided to these affiliates. Corporate services consist of administrative expenses incurred by AIR that are billed back to affiliated managed properties. For the year ended December 31, 2025, we recouped $2.1 million of corporate services in General and administrative expenses.

The AIR Operating Partnership is a partnership for federal income tax purposes and as such is not subject to federal income tax. The state and local tax laws may not conform to the United States federal income tax treatment, and AIR Operating Partnership may be subject to state or local taxation in various state or local jurisdictions, including those in which we transact business. Any taxes imposed on us reduce our operating cash flow and net income (loss).

Certain operations, including certain property management and risk management activities, are conducted through taxable REIT subsidiaries, which are subsidiaries of the AIR Operating Partnership, and each of which we refer to as a TRS. A TRS is a corporate subsidiary that has elected to be a TRS instead of a REIT and, as such, is subject to United States federal corporate income tax. We use TRS entities to facilitate our ability to offer certain services and activities to our residents and investment partners that cannot be offered directly by a REIT.

For TRS entities, deferred income taxes arise from temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts reported for United States federal income tax purposes, and are measured using the enacted tax rates and laws that are expected to be in effect when the differences reverse. We reduce deferred tax assets by recording a valuation allowance when we determine, based on available evidence, that it is more likely than not that the assets will not be realized. We recognize the tax consequences associated with intercompany transfers between the AIR Operating Partnership and TRS entities when such transactions occur. No material deferred tax assets or liabilities have been recognized as of the balance sheet date, and detailed tabular disclosures are not presented due to the insignificance of reported tax expense.

We calculate earnings per unit based on the weighted-average number of common OP Units, common unit equivalents, and dilutive convertible securities outstanding during the period. The AIR Operating Partnership considers both common OP Units and equivalents, which have identical rights to distributions and undistributed earnings, to be common units for purposes of the earnings per unit computations. Please refer to Note 9 for further information regarding earnings per unit computations.

The preparation of our consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts included in the consolidated financial statements and accompanying notes thereto. Actual results could differ from those estimates.

Accounting standards that have been issued by the Financial Accounting Standards Board, or other standards-setting bodies, that are not yet effective are not expected to have a material impact on our consolidated financial statements upon adoption.