What 4% Rule? Morningstar Has a New Number

News December 12, 2024 at 05:56 PM
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What You Need To Know

  • Spending at these rates is meant to provide at least a 90% probability that the saver's portfolio won’t run short of funds during a three-decade retirement.
  • The figure has fallen from prior years thanks to higher equity valuations and slightly lower bond yields.
  • Adding flexibility to the process can boost withdrawals and confidence.
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Morningstar identifies a new “safe” fixed withdrawal rate as one of the key takeaways from its updated annual State of Retirement Income report.

In addition, this year’s report digs into several potential retirement withdrawal strategies that can help savers make the most of their nest egg in retirement.

The new report suggests that investors seeking to maintain a spending rate that is annually adjusted for inflation during a 30-year retirement should start with withdrawals of just 3.7% — a small but meaningful decline from the 4.0% figure reported last year.

The current figure is substantially higher than the 3.3% projection made in 2021 but is lower than the 3.8% figure projected in 2022. The reduction from last year, according to a team of Morningstar researchers led by Christine Benz, is due primarily to higher equity valuations and slightly lower bond yields.

Spending at these rates is meant to provide at least a 90% probability that the saver's portfolio won’t run short of funds during a three-decade retirement period. Notably, retirees who want to maximize their lifetime spending in retirement “can and should explore alternative approaches,” according to the researchers.

The Morningstar team also urges savers and their financial advisors to explore how portfolio-withdrawal strategies can work hand in hand with other ways of increasing lifetime income — namely, delaying Social Security, setting up a laddered portfolio of Treasury inflation-protected securities or purchasing an annuity.

“We found that employing such strategies helps enlarge lifetime income,” Benz explains in a summary of the new report. “Moreover, seeking out stable sources of in-retirement cash flows can help offset the cash flow volatility inherent in flexible spending systems.”

Why 3.7% Withdrawals?

As noted, Morningstar’s lower base case of 3.7% is due primarily to higher equity valuations and slightly lower bond yields.

“The expectations for future portfolio returns fell based on the capital markets assumptions put together by our colleagues in Morningstar Investment Management,” Benz explains. “The anticipated 30-year returns for stocks and bonds were slightly lower in this year’s research compared with the previous year.”

More muted return expectations depress starting safe withdrawal percentages for the base case, which assumes a portfolio equity weighting of between 20% and 50%.

“Because of the higher volatility associated with higher equity weightings, boosting stocks detracts from the starting safe withdrawal percentage rather than adds to it,” Benz notes.

Naturally, savers who retire at older ages and who expect a retirement period shorter than 30 years can plan to spend more, with the projected safe withdrawal rates ranging up to almost 10% in some cases considered in the report.

The Role of Flexibility

As in prior years, the report considers the potential benefits of more flexible spending strategies that see savers make regular adjustments throughout their retirement journey.

“If a retiree is willing to adjust their spending in line with portfolio performance, that allows for higher starting withdrawals and generally higher lifetime withdrawals,” Benz observes.

Ways to introduce such flexibility include forgoing inflation adjustments after the portfolio lost value in the preceding year to more complex systems such as the “guardrails” approach originally developed by financial planner Jonathan Guyton and computer scientist William Klinger.

“All of these systems allowed for higher starting safe withdrawal rates than the fixed real spending rate we used as our base case,” Benz observes.

The Nuts and Bolts of Alternative Methods

Among the alternative spending strategies considered in the report is forgoing inflation adjustments following annual portfolio loss.

The method begins with the base case of fixed real withdrawals throughout a 30-year time horizon. However, to preserve assets after down markets, the retiree skips the inflation adjustment for the year following a year in which the portfolio has declined in value.

This might seem like a modest step, according to the researchers, but the small cuts in real spending are cumulative. Their effects “ripple into the future,” permanently reducing the retiree’s spending pattern. As a result, the initial spending rate can range toward 4% or even 5%, depending on other assumptions.

Another method relies on required minimum distributions to set the withdrawal rate. In its simplest form, the report states, the RMD method is “portfolio value divided by life expectancy.” For life expectancy, the report used the IRS’ Single Life Expectancy Table and assumed a 30-year retirement time horizon, from ages 67 to 97.

This method is designed to ensure that a retiree will never deplete the portfolio — because the withdrawal amount is always a percentage of the remaining balance. The main downside, while changes in life expectancy are gradual, is that the remaining portfolio value can change significantly from year to year, adding volatility to cash flows.

The guardrails approach, meanwhile, attempts to deliver “sufficient but not overly high” raises in upward-trending markets while adjusting downward after market losses.

For example, when the portfolio performs well and the new withdrawal percentage (adjusted for inflation) falls below 20% of its initial level, the withdrawal increases by the inflation adjustment plus another 10%. The guardrails must apply during down markets, too. In this scenario, the retiree cuts spending by 10% if the new withdrawal rate (adjusted for inflation) is 20% above its initial level.

While this approach allows the initial starting withdrawal rate to climb, it requires diligence and discipline to be successful.

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