If you look at the actual legislative text of the final version of the Patient Protection & Affordable Care Act (PPACA, or simply ACA), the table describing the applicable maximum percentage of income that exchange-based enrollees have to pay for their premiums looks like the table below:
(Notably missing is the lower-bound 100% FPL subsidy eligibility cut-off; there's a separate section of the law which notes the 100% threshold but makes an exception for certain lawfully-present immigrants who earn less than 100% FPL but who aren't eligible for Medicaid for various reasons and are given an exception).
UPDATE: Everything below refers to HR 369, but the American Rescue Plan, HR 1319, contains a virtually identical expansion of ACA subsidies...if only for two years.
Note that under HR 1319 (AmRescuePlan), the first year would be retroactive, meaning that current ACA enrollees should receive additional subsidies dating back to January 2021, though I don't know what form that will take...rebate checks, credit towards future premiums or an extra tax refund next spring.
Over the past couple of years, one of the things I've become known for is my obsessive fixation on visually displaying how much various households would save on healthcare premiums if various ACA subsidy-boosting bills were passed compared with the current ACA subsidy structure.
