Which income groups benefited most from the enhanced premium tax credits between 2023 and 2025?

1. Who gained the largest percent‑of‑income relief: lowest‑income enrollees

The clearest winners were people at the bottom of the income scale: the enhanced PTCs were structured to cover the full cost of a benchmark silver plan for those at or below about 150% of the federal poverty level, delivering the largest percentage reductions in premium burden and the deepest financial relief ^{[1] [4]}.

2. Who gained the most in absolute enrollment and dollars: millions across income tiers

Policy analysts report large absolute gains that span income levels: roughly 13–15 million people saw average annual premium savings near $800 in 2023, enrollment in the marketplaces rose from about 12 million in 2021 to over 24 million in 2025, and nearly all enrollees (about 93%) receive PTCs that substantially lower monthly costs ^{[2] [5] [1]}. These figures show that while the poorest gained the largest proportional relief, the program also produced large aggregate dollar benefits for middle‑income households because it expanded eligibility and lowered premiums broadly ^{[2] [1]}.

3. Middle and formerly ineligible higher‑income households: an important secondary beneficiary group

A defining feature of the 2021–2025 enhancements was elimination of the 400% FPL eligibility cap, which made people with incomes above 400% of FPL newly eligible for credits if their benchmark premium would exceed 8.5% of income; that change extended subsidies into middle and some higher income brackets, increasing affordability for those families and contributing to enrollment growth ^{[3] [6] [7]}. Urban Institute projections indicate the expanded rules led to several million more people receiving subsidized coverage in 2025 compared with pre‑enhancement law (7.2 million more subsidized in 2025 under enhanced PTCs, per Urban) ^[8].

4. Geographic and market effects: who benefited beyond household income

Rural residents and enrollees in states with previously fragile nongroup markets saw outsized gains because lower benchmark premiums and more entrants improved choice and risk pools; analysts point to rural benchmark premiums being about 10% higher than urban ones, meaning rural households benefited relatively more from the subsidy generosity, and some states (Florida, Georgia, Mississippi, Tennessee, Texas) experienced the largest enrollment increases ^{[2] [5]}. Moreover, even people not eligible for subsidies saw lower premiums due to improved market risk pools as subsidized enrollment rose ^[8].

5. Tradeoffs, integrity concerns, and contested measurements of “who benefitted most”

There is an important counterpoint: while low‑income households captured the largest proportional subsidy, the expansion into higher incomes concentrated sizable nominal dollar support among middle earners because there are simply more people in those bands; furthermore, federal analysts flagged integrity issues — the Congressional Budget Office estimated millions of improper claims or unusual income reporting patterns in 2023 and 2025 — which complicates precise accounting of benefits by income group and may overstate some gains ^{[9] [6]}. Policy groups and think tanks differ on emphasis: advocates (Commonwealth, CBPP, HealthAffairs) stress coverage and savings for the poorest and newly eligible, while some commentaries highlight the fiscal and administrative questions tied to rapid eligibility expansion and reconciliation practices ^{[2] [1] [5]}.

6. Bottom line — who benefited most between 2023–2025

Measured by percent reduction in premium burden and by direct targeting, the lowest‑income enrollees (roughly at or below 150% FPL) benefited the most; measured by aggregate dollars and increased numbers of people covered, the policy delivered large benefits across middle and some higher incomes because of the removal of the 400% cap and the sheer scale of enrollment growth, producing a broad but graduated pattern of gains ^{[1] [2] [3] [8]}.