The second, and potentially far more important, change that the American Rescue Plan Act of 2021 makes to the ACA is eliminating the “subsidy cliff.”
Under the original law, if your MAGI exceeds 400% of the FPL, you lose premium subsidies completely. Earning a single dollar of additional income at the 400%-of-FPL threshold could result in paying thousands of dollars in additional health-insurance premiums. Your subsidies would drop to zero.
With the change in the new law, the maximum anyone will pay for health-insurance premiums is 8.5% of their income. If your income exceeds 400% of FPL, you won’t lose thousands of dollars in premium subsidies. Instead, you will pay $8.50 more per year in premiums for every $100 of extra income you earn.