Currently, U.S. workers rely primarily on their employers to provide both wages and benefits (such as paid leave, retirement, and health insurance) as part of a total compensation package, with wages comprising approximately 70 percent of total compensation. Of the benefits package employers provide to employees, almost one-third is mandated by law, and includes contributions to programs such as Social Security, Medicare, workers’ compensation, and unemployment insurance, and other programs. The remaining portion of the benefits package is discretionary and typically includes paid leave, retirement income, and health insurance—some of the more costly benefits. Over the last century, employer-sponsored benefits have become an increasingly important part of compensating workers. Prior to the turn of the 20th century, workers relied primarily on their own, their families’, or the communities’ resources in the event of a health or economic emergency. With the advent of the industrial revolution in the United States, unions began to offer disability and death coverage to workers in order to protect them against workplace risks of factory work. The tight labor market of World War II, along with Supreme Court rulings and federal legislation, helped make benefits a legitimate part of collective bargaining and, in part, fueled the offering of employer-sponsored benefits. Outside the benefits that are legally required, those benefits that employers choose to provide serve a number of purposes. From a business perspective voluntary benefits assist employers to attract and retain highly skilled workers. For example, pension plans can be a means of attracting workers, reducing turnover, and encouraging productivity. Defined benefit pension plans, which are typically offered as periodic payments over a specified period beginning at retirement age, can be used to foster a worker’s long-term commitment to his or her employer. Defined contribution pension plans, which are individual accounts to which employers and/or employees make contributions, may be attractive to employees who desire more portable benefits. In deciding to offer benefits, companies must assess the nature of their particular workforce to determine if offering benefits is a necessary employment inducement. Employers may also choose to sponsor benefit plans because of favorable federal tax treatment for certain forms of compensation. To encourage them to establish and maintain pension plans, the federal government provides preferential tax treatment under the Internal Revenue Code for plans that meet certain requirements. A purpose of tax preferences for employer-sponsored pensions is to encourage savings for workers’ retirement. Pension tax preferences are structured to strike a balance between providing incentives for employers to start and maintain voluntary, tax-qualified pension plans and ensuring participants receive an equitable share of the tax-favored benefits. In fiscal year 2004, the federal government was expected to forgo an estimated $95 billion in federal income tax revenue due to the tax exclusion for employer-sponsored pension plans. Tax policies also contain significant tax benefits for employer-sponsored health insurance and medical care. Most notable, the tax exclusion for health care permits the value of employer-paid health insurance premiums to be excluded from employees’ taxable earnings for income taxes. It also excludes the value of the premiums from the calculation of Social Security and Medicare payroll taxes for both employers and employees. The tax exclusion is credited with increasing health coverage for employees. The risk pooling under group health insurance allows employees to obtain insurance at lower costs than the individual insurance market. The federal government was expected to forgo an estimated $153 billion in taxes in fiscal year 2004 due to the exclusion of employer contributions for health care. Recent developments are leading employers to make decisions about the provision of the employer-based benefits system. An aging population with longer life expectancies increases the long-term obligations of companies that provide defined benefit pension plans. Some companies have cited this obligation as a contributing reason for declaring bankruptcy, reorganizing, and terminating large plans of this type. Advances in expensive medical technology, increased use of high-cost services and procedures, and an aging population have contributed to escalating health care costs. Advances in other technologies have stepped up competition from foreign firms by increasing global competition. In response to such competition, U.S. firms have continued to look for ways to reduce their costs, such as offshoring and using contingent workers (many of whom are not offered benefits). In addition to employer-sponsored benefits, multiple federal programs supplement workers’ and retirees’ benefits. For example, Social Security pays monthly cash benefits to more than 36 million eligible retired or disabled workers. Intended to complement retirement incomes, in many cases Social Security may provide the only source of such retirement income. In addition, the federal-state Medicaid program provides health insurance to certain low-income individuals including older Americans in need of long-term care who meet financial eligibility and other requirements. Most recent figures show Medicare provides health insurance to 35 million individuals age 65 years and more than six million disabled individuals under age 65. Private employers’ average cost of total compensation (comprised of wages and benefits) for current workers grew by 12 percent between 1991 and 2005, but benefit costs outpaced wages in the most recent years after controlling for inflation. The increases in average total compensation costs were greater for employers with medium and large establishments, full- time workers, and union workers, than for those with small establishments, part-time workers, and nonunion workers. The overall real costs of benefits grew by 18 percent, while real wages grew by 10 percent. Benefits represented more than a quarter of total compensation costs. On average, overall employers’ inflation-adjusted cost for total compensation rose about 12 percent between 1991 and 2005. Both components of total compensation—wages and benefits—had also grown after adjusting for inflation, but at different rates. By the end of the period, the cost of total benefits grew by approximately 18 percent and wages had increased by 10 percent (see table 1). By 2005, benefits accounted for 29 percent of total compensation while wages made up 71 percent of the workers’ compensation package. Across the 15 years under examination, the cost of wages and benefits generally grew in tandem, albeit at different rates (see fig. 1). The noteworthy exception was after 2002 when benefit costs continued in a steep ascent and wages began to flatten, resulting in an almost 8 percentage point difference between the growth rates of the two. The recent divergence between benefits and wages is not unprecedented; there was a 6 percentage point difference between wage increases and benefit cost increases in 1994. However, what makes the divergence between the growth of wages and benefits after 2002 compelling is that it is preceded by a steady increase for both. The result, therefore, has been a significantly larger real dollar cost to employers—roughly $1,000 more per year in benefit costs for each full-time employee—when comparing 1994 to 2005. As was the case in the aggregate, by 2005, growth in the real cost of benefits outpaced the increase in wages for each type of employer (see table 2). For employers of union workers this effect was even more pronounced; these employers experienced benefit cost increases greater than wage increases over most of the time period and saw several years of no growth in wages. This pattern of benefit growth outpacing wage growth rates was least pronounced for employers of part-time workers, but still true. (See app. II, fig. 5 to 13 for all employers.) While employers uniformly saw average real benefit costs grow more than average real wages, the overall increase in total compensation varied by employer type. Employers at medium (100 to 499 workers) and large establishments (500 or more workers) experienced increases in total compensation costs of roughly 20 percent. In contrast, small establishments did not experience statistically significant increases in total compensation costs. Employers’ total compensation costs for full-time workers increased by 16 percent as compared with the 13 percent increase for part-time workers. Employers of unionized workers saw their total compensation costs grow by 21 percent as compared to the 13 percent increase experienced by employers of nonunion workers. (See app. II, tables 8 to 12 for all employers.) The increase in the cost of a total benefits package from 1991 to 2005 was largely composed of increases in the cost of providing health insurance and retirement income. Paid leave had traditionally been the most costly benefit to employers, but by 2005, the cost of health insurance equaled that of paid leave. Of the three benefits, retirement income was the least costly, even though it grew by an estimated 47 percent in real terms during the period, largely between 2004 and 2005. The increase in the real cost of a total benefits package from 1991 to 2005 was largely composed of increases in the real cost of providing health insurance and retirement income. (See table 3 and fig. 2.) Paid leave had traditionally been the most costly benefit to employers, but by 2005, the cost of health insurance equaled that of paid leave. This occurred, in part, because health insurance costs grew by 28 percent while the costs for paid leave did not show significant growth during the period under study. Of the three benefits, retirement income was the least costly, even though it grew by an estimated 47 percent during the period, largely between 2004 and 2005. In combination with paid leave, these three benefits represented on average almost 60 percent of an employee’s total benefit package and over 80 percent of employers’ costs for voluntary benefits. Expert panelists discussed underlying factors driving trends in real costs for employer-sponsored benefits from 1991 to 2003. Regarding trends in retirement income, an expert noted that employers decreased their contributions to funds for defined benefit plans during the 1990s, which was reflected in a decrease in employer spending for retirement income. According to the Bureau of Labor Statistics, defined-benefit pension plan assets grew rapidly in the middle to late 1990s as the stock market continued to rise, so employers often did not need to contribute funds to defined-benefit pension plans. Stock prices generally fell from April 2000 to February 2003, and interest rates on bonds and other investments remained low, requiring employers to contribute more funding to defined- benefit plans beginning in 2003 to meet minimum funding requirements. Recent increases in employer costs for retirement benefits can be attributed to a similar phenomenon.