You may elect to contribute between 1% and 50% (90% if making catch-up contributions) of your pay on a post-tax basis by making Roth elective deferrals. You may choose a contribution percentage in hundredths of a percent (for example, 11.55%).

The tax rules governing Roth elective deferrals are complicated. You may want to consult your tax advisor regarding the financial impact of designating Roth elective deferrals, and how they might fit into your retirement income planning.