Corporate employers plan to spend an average of $521 per employee on wellness-based incentives in 2013. This marks an increase of 13% from the average of $460 per employee reported in 2011, and double the per-employee average of $260 reported in 2009, according to an employer survey by the nonprofit National Business Group on Health and Fidelity Investments.

Data for the survey were collected in October and November 2012 from a sample of 120 U.S. companies spanning a range of fewer than 2,000 to more than 50,000 employees.