Both 401(k) and 403(b) plans can include a Roth component.

No. Unlike Roth IRAs, any employee eligible for the plan can make Roth deferrals regardless of income.

The salary deferral limit is $16,500 for 2010. Roth and pre-tax deferrals are added together for purposes of this limit.

Yes. Catch-up contributions merely represent an increase in the regular deferral limit for those who are catch-up eligible.

Prior to 2010, those above a certain income threshold (generally $120,000 for individuals and $176,000 for married couples) were not permitted to make Roth IRA contributions. Starting this year, that income cap is removed for those who wish to convert non-Roth IRAs into Roth IRA accounts. The amounts converted must be included in taxable income; however, those who convert during 2010 have the option to spread that tax liability equally over two years.

No. The regulations make it very clear that when a participant elects to make pre-tax deferrals, that election is irrevocable. While the participant may change how future contributions are designated, existing contributions cannot be converted within the plan. However, there has been discussion on Capitol Hill about changing the law to allow conversions inside the 401(k) plan similar to the IRA conversions that are allowed beginning in 2010.

Yes. Roth accounts from a qualified plan or 403(b) plan can be rolled into another qualified plan or 403(b) plan that allows Roth contributions. These amounts can also be rolled into a Roth IRA.

No. Roth IRAs can only be rolled into other Roth IRAs.

A participant must complete a so-called five-year period and the distribution must occur on or after attainment of age 59½, death or disability. A tax-free Roth distribution is referred to as a qualified distribution.

The five-year period is generally a holding period a participant must satisfy to take a qualified distribution. It begins on the first day of the first taxable year in which a participant first makes Roth deferrals to the plan. For example, if a participant makes his first Roth deferral on October 1, 2010, the five-year period starts on January 1, 2010.

Plan sponsors and their service providers are required to track the Roth five-year period as well as the amount of basis for each participant. This requirement is likely to present significant record-keeping challenges, especially in takeover situations.

It depends. If the participant rolls over his Roth account to the new plan, the portion of the five-year period already satisfied is transferred to the new plan. However, if the participant does not roll over the Roth account, his five-year period starts over with respect to contributions to the new plan.

No. The two five-year periods are determined independently of one another. Thus, a rollover of a Roth deferral account into a Roth IRA requires the five-year period to be redetermined.

A deemed distribution of a participant loan is never treated as a qualified distribution even if it occurs after the participant has satisfied the five-year period and attained age 59½, died or become disabled. Therefore, the portion of the deemed distribution attributable to Roth is subject to income tax. To avoid confusion in this area, the loan policy can be written to restrict participant loans to non-Roth accounts.

Yes. Roth deferrals are included with pre-tax deferrals for purposes of the ADP test. However, since Roth deferrals are not tax-deductible, lower-paid participants may be unable to defer at the same level as with pre-tax deferrals.

Example: Marge earns $50,000 and has $5,000 available to save for retirement. She is in a combined 25% tax bracket. If Marge makes pre-tax deferrals, she can contribute the full $5,000 to the plan. However, if Marge makes Roth deferrals, she must pay $1,250 (25% of $5,000) in taxes, leaving her with only $3,750 to contribute to the plan. Since Marge is a non-highly compensated employee, her lower deferral percentage would have a negative impact on the ADP test.

Employers may want to consider a safe-harbor 401(k) plan if they are likely to experience this situation.

No. The availability of Roth deferrals is subject to the minimum coverage rules for 401(k) plans and the universal availability rules for 403(b) plans.

Unless plan terms specify otherwise, pre-tax and Roth deferrals are both considered in the employer match calculation. Matching contributions are always treated as tax-deferred regardless of whether Roth deferrals are used in the calculation.

Yes. The regulations specifically provide that Roth deferrals are subject to the required minimum distribution rules. This is in contrast to Roth IRAs which do not require minimum distributions. It appears that a participant may avoid required minimum distributions on Roth deferrals by rolling over these amounts to a Roth IRA prior to the attainment of age 70½.

No. Roth and pre-tax accounts are considered separately for purposes of the automatic rollover rules. Therefore, to the extent the Roth and/or pre-tax portion of a participant's account is less than $1,000, it is not required to be automatically rolled over even though the combined vested account balance may exceed $1,000.

No. Regulations clearly state that a designated Roth account can only be rolled over into another 401(k) or 403(b) plan that has a designated Roth program.

Yes. Employers must report Roth deferrals in box 12 of Form W-2 with code AA for 401(k) plans and BB for 403(b) plans.

Roth distributions must be reported on a separate Form 1099-R using Code B. The non-taxable basis is reported in Box 5, and the beginning of the five-year period is reported in an unnumbered box next to Box 10.

No. The participant is not required to report any additional information with respect to Roth 401(k) or 403(b) contributions. However, a participant rolling over a Roth deferral account into a Roth IRA must keep track of the rollover amounts and the five-year period with respect to the IRA.

The answer to this question depends on each individual's financial situation and is beyond the scope of this article. Factors such as current and future tax brackets, estate planning needs and more will impact the decision, so participants should consult their tax and/or legal advisors for assistance in reviewing all of the relevant facts and circumstances.

While Roth IRAs are enjoying significant publicity due to the change in the conversion rules, it is interesting to note that there has not been significant implementation of the feature in 401(k) plans. According to the Profit Sharing/401(k) Council of America's 52nd Annual Survey, 36.7% of plans allowed Roth contributions in 2008; however, only 15.6% of participants that had the Roth option available elected to take advantage of it.

Plan sponsors who are considering Roth 401(k) deferrals should consult with their advisors and service providers to review the potential advantages and disadvantages that the Roth feature provides.