A recent survey found that over 80% of 401(k) plans now offer employees the option of making Roth 401(k) employee contributions. More and more employees are now taking advantage of that opportunity. (In this article, I use the term “Roth 401(k) contributions” to also include Roth employees made to 403(b) and municipal 457(b) plans.) Here are five things to keep in mind about Roth 401(k)s if your plan offers them: