The lede. On June 27, 2025, the Supreme Court settled the constitutional threat to the Universal Service Fund, ruling 6-3 in FCC v. Consumers' Research that Congress didn't unlawfully hand its taxing power to the FCC (and the FCC didn't unlawfully hand it to USAC). The $9-billion-a-year subsidy machine survives. But surviving isn't the same as being fixed — and the mechanism now churning in plain sight is the real money story: the USF "contribution factor," the surcharge carriers pay on interstate long-distance and wireless revenue to fund Lifeline, E-Rate, Rural Health Care, and High-Cost support, has been on a straight-line march upward — 37.6% in Q1 2026, 37.0% in Q2, a proposed 38.8% in Q3, with USAC and industry groups now projecting a run at 42%+ as the assessable revenue base keeps shrinking. Every point of that climb is a direct tax on the same shrinking pool of legacy voice revenue at AT&T, Verizon, and T-Mobile — while a live Senate push (the Lowering Broadband Costs for Consumers Act) would finally force broadband and "edge provider" revenue into the base. Whoever wins that fight decides who eats the bill next.

Who cashes in. AMT (American Tower) sits outside the contribution fight entirely and profits from the programs USF money funds — High-Cost support and BEAD-adjacent rural buildout both mean more fiber-fed rural towers and more carrier capex flowing through AMT's lease book, with none of the contribution-factor exposure that hits the carriers directly. TMUS is the structural winner among carriers: T-Mobile's all-wireless, high-growth revenue mix and lighter reliance on the shrinking legacy interstate toll-revenue base it must assess means each contribution-factor hike bites a smaller, more diluted share of total revenue than it does for AT&T's copper-legacy book. CHTR and CMCSA, as predominantly non-telecom cable/broadband providers with comparatively small regulated interstate telecom revenue, currently sit largely outside the assessable base — meaning if the broadband-provider-pays reform actually lands, they gain a large, currently-untaxed new revenue category to defend, but until then they're simply not writing the checks AT&T and Verizon write.