4% rulemakers reveal new safe retirement withdrawal rates
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In 1994, Bill Bengen published a groundbreaking study that shaped the way retirees approach their income plans. He introduced a 4% rule. This suggests that retirees can safely withdraw 4% of their portfolio in the first year of their retirement and then adjust that amount for inflation.
This strategy is designed to ensure that retirees maintain their savings and keep their money from running out over 30 years of retirement.
Thirty-one years later, Bengen will be releasing his upcoming book, “Enricher Resignation: Enjoy More to Spend More and Enjoy More” to be released later this year. Retirees believe they can safely withdraw 4.7% of their portfolio in their first year of retirement from the first 4% rule and guarantee 30 years of savings.
However, before retirees blindly follow Bengen’s rules of thumb, he outlined eight important factors to consider when developing a retirement income plan in a recent episode of retirement retirement.
“Many people hang right first. What is my number? Is it 4%? Is it 5%?” Bengen said (see the video above or listen below). “And there’s a lot you have to look at before you can reach that point.”
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The first step to developing a personal retirement withdrawal plan is to choose a scheme to withdraw money.
Most people don’t realize that the 4% rule (currently upgraded to 4.7%) is based on a specific mathematical approach to withdrawing retirement money, which is a serious market slump early in retirement, and historically based on periods of high inflation, Bengen said. Under this rule, retirees with a $1 million IRA withdraw 4.7%, or $47,000, in their first year.
Bengen then said that the proportion was no longer used. Instead, withdrawals are adjusted annually based on inflation. Like social security. For example, if inflation is 10%, the withdrawal for the following year will increase by 10%.
Bengen said the method aims to maintain long-term purchasing power for retirees. However, it’s just one of many approaches. Other strategies include withdrawal of fixed percentages of assets, pension use, or front-loading expenditures at early retirement, and reductions in about 10 years. And he said each approach has different financial implications.
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The second factor is determining your “planned horizon,” Bengen said. This is one of the most challenging aspects of the development of a withdrawal plan, as it is directly linked to your life expectancy as an individual and, if applicable, as a couple.
“You don’t necessarily want to plan to use your last dollar in your breath of death, as most of us can’t get the timing down,” he said.
And since it is impossible to accurately predict lifespans, Bengen said it would be wise to build an error that is probably about 30% more than the extra decade or expected lifespan.
Given that many people currently live in over 100, he said it’s better to plan conservatively than risking running out of your 90s money.
“We don’t want to readjust this somewhere in the mid-’90s,” Bengen said. “You’ll want to take care of me when you retire.”
The third important factor is whether they are withdrawing from a taxable portfolio or from an untaxable portfolio. This can have a significant impact on withdrawal rates.
The 4.7% rule assumes non-tax accounts such as IRAs. However, if you borrow taxes on retirement benefits, interest and dividends, the principal will erode and ultimately reduce the sustainable withdrawal rate.
“My methodology assumes that the investment account used to fund a withdrawal during retirement pays all income taxes generated by the realization of investment income, namely profits, dividends and interest,” Bengen explained in his upcoming book. “For tax accounts, these taxes are by definition zero. As this money has left the portfolio, I am not worried about taxing such withdrawals from such accounts. Instead, I focus on what the funds will happen while remaining in the portfolio.”
Because taxable accounts are subject to ongoing tax liabilities, retirees must consider how taxes affect withdrawal tax. “The higher the tax rate, the greater the penalty you pay with taxes,” Bengen said. “So you have to take that into consideration.”
The fourth important factor is whether you want to leave money to your heirs. According to Bengen, the assumption of the 4.7% rule, which is often overlooked, is that your portfolio balance will reach zero by the end of the planning horizon.
If your goal is to leave the substantive inheritance, he said you need to adjust your withdrawal rate accordingly. This often means withdrawing each year, and sometimes significantly less.
“The price to pay to make the heir happy is high, so you have to exchange it for making yourself happy during your retirement,” Bengen pointed out. “It’s a discussion between you and your financial advisor.”
Ultimately, he said, this is a very personal decision.
“It’s very individualistic and everyone has to make that decision for themselves,” he said. “But it’s a decision that has to be decided. You can’t leave it to chance. That will affect your withdrawal rate.”
The way you build your investment portfolio is another important factor that plays a key role in determining your withdrawal rate, Bengen said.
His research suggests that by keeping the stock allocation at around 47% to 75%, the rest will be bonds and cash, with a sustainable withdrawal rate of around 4.7%. However, if you get lost outside of the range with either too little or too much inventory, your withdrawal rate can be reduced.
In his study to develop the 4.7% rule, he used a properly spread portfolio of seven different asset classes assigned in a fixed way during the course of retirement.
He further stated that while many retirees maintain fixed asset allocations, other strategies can actually improve their withdrawal rates, such as rising stock gliding paths that gradually increase with stock exposures lowered. Other methods, including guardrails to adjust withdrawals based on market conditions, also offer an alternative approach to managing portfolio risk at retirement.
“There are so many ways to approach it — fixed allocations, rising glide passes, guardrails — but ultimately, that’s a decision every retiree has to make,” he said.
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Bengen described his sixth key strategy, portfolio rebalancing, as one of the “four free lunches” available to retirees.
At its core, rebalancing involves periodically reverting the portfolio to its original asset allocation after a set period. It is generally best once a year, he said.
In addition to optimizing withdrawals, rebalancing is also a critical risk management tool.
“That’s important because it prevents your portfolio from being over-over and extremely unstable with dangerous assets like inventory and being completely destroyed once you reach the stock-bear market,” Bengen said.
Some experts argue that retirees should reduce their share allocations as they age to reduce portfolio risk, but Bengen’s research suggests that this is not the case. When testing different approaches, he found that reducing inventory exposure during retirement actually lowers sustainable withdrawal rates.
“There are three options: cut, maintain, or increase the stocks,” explained Bengen. “Of the three, the worst case scenario is to reduce inventory allocations.”
In his research, he found that reducing your inventory allocation reduces your withdrawal rate. “That’s one thing you don’t want to do,” Bengen said.
The next best is to maintain your fixed asset allocation during retirement. And a slightly better approach is to start with a slightly lower share distribution, such as 40% stocks and 60% bonds, gradually increase your stock exposure, as this “rising glide pass” can slightly increase your withdrawal rate.
Bengen’s research assumes that retirees are investing in index funds and aiming to acquire market returns for each asset class. For example, if your portfolio includes an S&P 500 (^gspc) components, the goal is simply to match the return of the index, not to beat them.
However, for those who are confident in their investment skills, Bengen offers an analysis in his book on how higher returns affect their withdrawal rates. He calculated how much the withdrawal rate for retirees would increase for each additional percentage return point, but also warned of risk if those expectations were not met.
“Unless you’re an exceptional individual and there’s no one who can win the market, you might want to stick to an index fund,” Bengen said. “If we fail to meet our target, the withdrawal rate will drop, which is a real concern.”
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The last factor is if you want to receive payment.
Many retirees prefer to receive withdrawals on a regular schedule, as well as their pay. In his study, Bengen assumes an even distribution of withdrawals throughout the year, which is consistent with this general practice.
However, he also analyzed the effects of taking withdrawals as a bulk at the beginning or end of the year, finding that this could have a significant impact on sustainable withdrawal rates.
“If you take it all out the last time, or you take it all out first, you’re going to have a different number,” explained Bengen. “It’s very different from the numbers that arise from a 4.7% or evenly distributed separation pattern.”
Ultimately, retirement planning is not a “set it and forget it” process. Continuous monitoring and coordination is required for the course to go well. Over the course of his 30-year retirement, there must be unexpected challenges. How retirees respond is just as important as the initial plan itself.
“The 30-year plan will encounter problems just like anything else,” Bengen emphasized. “And how you deal with them is really important to the success of your withdrawal plan.”