The Kaiser Family Foundation has come out with a nifty tool to illustrate premiums and government assistance under the types of reform proposals being considered in Congress. The online calculator works for people under age 65 who purchase coverage on their own in an Exchange or Gateway and are not covered through their employer, Medicare or Medicaid.
The tool allows the user to start with the provisions from one of several proposals and examine the impact at different income levels. Advanced settings even allow users to change assumptions to show the effect of different policy choices.
This information is intended to show how people in different circumstances would be affected by the types of reforms under consideration. However, it does not provide estimates of the impact of reform for those with employer or public coverage.
You can check it out at: http://healthreform.kff.org/Subsidycalculator.aspx