The American Health Care Act, which narrowly won passage in the House on Thursday, could transform the nation’s health insurance system and create a new slate of winners and losers.

While the Senate will probably demand changes, this bill, if it becomes law in its current form, will repeal and replace large portions of the Affordable Care Act (Obamacare). It will change the rules and subsidies for people who buy their own insurance coverage, and make major cuts to the Medicaid program, which funds care for the poor and disabled.

Any sizable change in our complex health care system leaves some people and businesses better or worse off. For some, insurance will become more affordable — or their taxes will be lower. Others will lose out on financial support or health care coverage. You can see how you might be affected in our summary of winners and losers.

Winners

High-income earners: The bill eliminates two taxes on individuals earning more than $200,000 or couples earning more than $250,000: a 0.9 percent increase on the Medicare payroll tax, and a 3.8 percent tax on investment income. It also allows people to save more money in tax-excluded health savings accounts, a change most useful to people with enough money to have savings.