Health care spending clearly affects families' ability to make ends meet. In 2007, according to the nationally representative Community Tracking Study, slightly more than 19 percent of families indicated that they had problems paying medical bills. Problems occurred more frequently among uninsured families; however, families with insurance also reported problems.
The proportion of respondents reporting problems in the Community Tracking Study is slightly below that found in a June 2009 survey conducted by the Henry J. Kaiser Family Foundation. During the interviews for the 2009 survey, 26 percent of respondents said that they or a family member had trouble paying a medical bill during the past year (Kaiser, 2009).
Complicating our ability to understand the financial risk that health spending can pose is the variation in metrics and methods used to describe levels of risk. Some studies draw on large public surveys containing information on income, demographics, assets, insurance status and type, health needs, and behaviors in order to determine what proportion of a household's income goes toward health care spending. Other studies depict financial risk in terms of the effect—real or perceived—that health spending has on use of health care services or on medically induced debt.
For example, health care spending has been described as unaffordable in the following ways, among others:
- Shen and McFeeters (2006) characterize out–of–pocket (OOP) health spending (excluding premiums) as unaffordable if it represented more than 5 percent of family income, as does Cunningham (2009).
- Blumberg et al. (2007) propose using a flexible standard based on the proportion of income spent on health care by currently privately insured individuals.
- Waters, Anderson, and Mays (2004) define households as lacking financial protection from health expenses if their out-of-pocket expenses, excluding premiums, exceed $2,000 per family member per year or 10 percent of family income, or if spending, including premiums, exceeds 40 percent of income.
- Another approach calculated the share of "discretionary" spending consumed by health care expenditures, including premiums (Bernard, Banthin, and Encinosa, 2006).
- Some authors have considered health spending unaffordable if family income minus health spending is below the federal poverty level or some variant of that level (Bundorf and Pauly, 2006).
The discussion below draws from literature reflecting many of these definitions.




