In the baseline, EBRI found that few scenarios yielded results where the equivalent DB accrual rate was under 1.5%.  In other words, DB plans would typically have to accrue at more-generous rates to “break-even” with auto-enrollment 401(k) plans.

However, when EBRI applied various “stress tests” by reducing rates of return, or by utilizing current annuity prices, auto-enrollment 401(k) plans lost their comparative advantage to DB plans.

Auto-portability: The Great Equalizer

When EBRI's equivalence comparisons incorporated auto-portability, which reduces plan leakage from cashouts, auto-enrollment 401(k) plans delivered substantially better results.

Pairing auto-enrollment 401(k) plans with auto-portability resulted in DB plans having to provide far more generous accrual rates to achieve equivalence vs. baseline.

The impact of auto-portability was particularly impressive among the lowest income quartile, “given their lower account balances and the negative correlation between account balances and cashout activity.”

Additionally, EBRI found auto-portability's results to be “dramatic for males in the lowest income quartile with only 11-20 years of plan eligibility” requiring a 3.1% DB accrual rate to reach equivalency, an increase of 82% over the baseline accrual rate of 1.7%.

Extending the DB vs. DC plan comparisons to millennials

On 2/14/19, as a follow-on to its initial analysis, EBRI released an infographic – How Will Young Millennials Fare With Defined Contribution vs. Defined Benefit Plans? – revealing the beneficial effect of auto-portability on millennials.

When auto-portability was added to 401(k) plans, millennials — both male and female, for all years of eligibility, and for all income quartiles — experienced dramatic improvements in 401(k) plan performance vs. baseline, as measured by break-even DB plan accrual rates.

The growing body of research supporting auto-portability

This analysis adds to a growing body of research from EBRI demonstrating that auto-portability, by reducing cashout leakage, broadly increases retirement security and delivers significant benefits for America's defined contribution system.

Previous EBRI analysis addressing the public policy benefits of auto-portability includes the following:

• Standalone benefits of auto-portability (EBRI Issue Brief, no. 451- May 2018), estimated to be between $1.5 and $2.0 trillion.
• Benefits of auto-portability, when combined with other retirement savings public policy initiatives, such as the Automatic Retirement Plan Act of 2017, or ARPA (EBRI Fast Facts – September 2018), where auto-portability's impact reduced the $4.13 trillion retirement savings shortfall by $645 billion, or 15.6%.
• Significant reductions in the retirement savings shortfall (RSS) for Generation X retirement savings shortfalls, by gender (EBRI Issue Brief, no. 471 – January 2019).

Tom Hawkins is Senior Vice President, Marketing & Research at Retirement Clearinghouse.