Tax Legal Services · Primary-source case analysis

Detroit Edison: Customer-Funded Utility Extensions Did Not Create Depreciable Cost Basis

By Aneeta Mishra and Timothy Chan

Published August 25, 2026

Detroit Edison Co. v. Commissioner concerned payments required from customers when the expected revenue did not justify the utility’s cost of extending service facilities.

The customers paid to obtain service

The transfers were the price of securing line extensions to their premises, not disinterested contributions made to enlarge the utility’s capital.

Depreciation follows the taxpayer’s own capital investment

Although the utility owned the completed facilities, it had not borne the customer-funded portion of their cost and could not recover that amount through depreciation deductions.

Ownership alone did not establish tax basis

Legal title to an asset does not necessarily show that the taxpayer has depreciable cost in every dollar spent to construct it.

Modern contribution rules require current-law analysis

Congress later enacted and amended provisions governing contributions to corporate capital and regulated utilities. Sections 118 and 362 and the transaction date now control.

Key takeaways

• Trace who economically funded each construction component.
• Distinguish service payments from capital contributions.
• Reconcile book cost with federal tax basis.
• Apply the current versions of sections 118 and 362.