Congressional proposals health care reform proposals have differed in the premium rating rules that would be applied to non-elderly adults. Some have proposed allowing premiums for the older adults to be as much as 5 times as high as those for younger adults (5:1 rating), while others would limit the highest premiums to be twice that of the lowest (2:1 rating). This analysis uses the Health Insurance Policy Simulation Model (HIPSM) to compare the financial implications of the premium rating choice (5:1, 2:1, and 1:1) for households of different ages, incomes, and sizes.