Mercer's Quick Benefit Facts for 2018 contain the annual limits through 2018 for various employee benefit purposes, including figures for 401(k) and 403(b) contributions, annual retirement plan limits, the definition of highly compensated employees, and Social Security taxes and benefits. Review the numbers below and download your own copy.
* Reduced to 4.20% for employees in 2011 and 2012
**High income employees pay additional 0.9%
*** Means testing began in 2007