Employers remain committed to providing health benefits to their workforce, but not without some changes over the next few years, according to a recent report from Towers Watson and the National Business Group on Health.

The groups surveyed major employers about their health benefit policies and found that 94 percent expect employer-sponsored plans to undergo modest or major changes by 2018. This is the 19th year that the groups have conducted the employer survey. Nearly 20 percent of top-performing companies — those that have maintained a low level of cost increases for four years — plan to adopt policies that hold providers accountable for performance; 10 percent of all respondents plan to do so.