3724: Constant Retirement Withdrawals: Realistic or Not? By Darrow Kirkpatrick of Can I Retire Yet on Safe Withdrawal Rate
Optimal Finance DailyOctober 05, 2026
3724
00:11:27

3724: Constant Retirement Withdrawals: Realistic or Not? By Darrow Kirkpatrick of Can I Retire Yet on Safe Withdrawal Rate

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Episode 3724:

Darrow Kirkpatrick explains why most retirement models rest on a flawed assumption: that you will withdraw the same amount every single year. He lays out three reasons real withdrawals fluctuate, from delayed Social Security to shifting market valuations to household expenses that drop sharply after age 55. His case is for flexible retirement planning and honest safety factors rather than one cookie-cutter number.

Read along with the original article(s) here: https://www.caniretireyet.com/constant-retirement-withdrawals-realistic-or-not/

Quotes to ponder:

"Most retirement analyses assume you'll withdraw the same amount from your nest egg every year."

"Common sense and personal experience indicate that most individuals will adjust their spending based on the perceived size and health of their nest egg, which is likely to fluctuate over a decades-long retirement."

"Avoid a cookie-cutter approach: implement a flexible lifestyle, shun debt and large fixed expenses, add in some part-time work if possible."

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[00:00:56] This is Optimal Finance Daily. Constant Retirement Withdrawals. Realistic or not? By Darrell Kirkpatrick of CanIRetireYet.com. And I'm Justin Malek. I read to you from the best articles online every single day of the year with permission from the authors. So let's continue the tradition as we optimize your life.

[00:01:21] Constant Retirement Withdrawals. Realistic or not? By Darrell Kirkpatrick of CanIRetireYet.com. Quote, A foolish consistency is the hobgoblin of little minds. Ralph Waldo Emerson. There is a fatal flaw in most simple retirement models and rules of thumb.

[00:01:44] For example, the famous 4% rule, which states that you can withdraw 4% from a diversified portfolio adjusted for inflation every year and expect it to last for a 30-year retirement. That rule has a number of problems, but for our current discussion, the glaring error is simply this. You are highly unlikely to spend a constant amount every year in retirement.

[00:02:10] Most retirement analyses assume you'll withdraw the same amount from your nest egg every year. It's the rare financial advisor who will spend hours with clients determining their actual cost of living and how it is likely to change over the years. So a single number is usually chosen. That's accurate enough to get some idea of where you stand for retirement.

[00:02:31] But once you plan your retirement cash flow in detail, or actually retire, you'll realize that this cookie-cutter approach to spending just doesn't cut it. Here are just three of the prominent reasons that your retirement expenses and withdrawals will inevitably fluctuate over time. Number one, pensions or social security may not start immediately.

[00:02:56] If you're fortunate enough to retire early, then it might be 5, 10, or more years before any sort of pension or social security kick in. Even if you aren't retiring early, you might have to wait on a spouse's social security or some other future income stream. Or perhaps you decide to follow the common advice and delay taking social security in order to increase your total payout.

[00:03:20] In any of these scenarios, the withdrawals from your NASDAQ must be larger earlier in retirement to cover expenses until the pension starts. But then those withdrawals can be lowered, possibly substantially, once you have regularly occurring income to cover expenses. Number two, market returns and valuations will fluctuate. Most of us now understand that you can't plan for retirement using historical stock market averages.

[00:03:49] That's because history may not repeat, and just as critically for retirement cash flows, it may not repeat in the same sequence. Stock valuations are now near all-time highs, so we can't expect historical real stock returns anytime soon. But will those conditions prevail forever? Unlikely. But who knows for certain. So what does that mean for your retirement withdrawals?

[00:04:15] Common sense and personal experience indicate that most individuals will adjust their spending based on the perceived size and health of their NASDAQ, which is likely to fluctuate over a decades-long retirement. And number three, your lifestyle will change over time. Data from the U.S. Bureau of Labor Statistics shows a general drop-off in household expenses starting at age 55.

[00:04:42] By age 75, expenses are only 60% of what they were for couples in their 50s. Currently, this is true even though the share of healthcare expenses doubles. For anybody reaching retirement in the empty nest stage of life, this makes intuitive sense. Gone are child and education expenses. Gone are commuting and work-related expenses.

[00:05:05] Sure, travel and recreation expenses may go up, but that can be offset in whole or part by greater flexibility, since you no longer have to visit those prime spots while everyone else is on vacation, and by downsizing in other areas of your life, houses and vehicles, for example. So those are three strong reasons why your retirement expenses and withdrawals won't stay constant, as many retirement models assume.

[00:05:33] But knowing that, what should you do about it? For starters, realize that if you really want to understand and drive your retirement, you'll need to use a more sophisticated model. It's the difference between looking up the mileage between two points on a map to know approximately how long a trip will take, versus actually taking the journey while navigating all the ensuing starts and stops, twists and turns.

[00:06:01] A more sophisticated model can incorporate more realistic estimates for portfolio and annuity performance based on today's valuations and interest rates. It can include the present value of future income, so you understand how pension payments in the future impact your current spending. It can include estimates of how you expect expenses to change as you progress from empty nest to early retirement to the later years.

[00:06:30] And it can even attempt consumption smoothing, an optimal spending plan that allows for a consistent lifestyle amid varying income flows over time. If you don't want to do the work to create a more sophisticated model of your retirement, or find and pay somebody trustworthy to do it for you, then you could instead take the time-tested approach of applying some large safety factors.

[00:06:56] For example, you could ignore those Bureau of Labor Statistics numbers and assume you'll keep spending what you spent in your 50s up into your 80s and 90s. That ought to be a conservative assumption. But it does risk leaving some money on the table when you die with regrets about what that money might have bought. Another safe and simple approach is to guard your principle, spending only income and dividends. Or if you are taking a total return approach,

[00:07:26] to cut back your lifestyle if it appears your nest egg is shrinking over a sufficiently long enough time period. There's a lot of appeal to these super safe approaches, but understand that only a small percent of retirees will have the means to implement them. In today's economic environment, it is very difficult to generate enough income from your investments to cover all your expenses. You will need substantial assets, a tall order for many.

[00:07:55] Bottom line, it is unrealistic to expect your investment returns, your income, your expenses, or your withdrawals to be constant over the course of a 30 to 40-year retirement. Anticipate there will be changes, at least in the first phases of your retirement years, and develop tools for measuring your progress. Avoid a cookie-cutter approach. Implement a flexible lifestyle.

[00:08:23] Shun debt and large fixed expenses. Add in some part-time work if possible, and you will have the options you need for managing change. You just listened to the post titled, Constant Retirement Withdrawals, Realistic or Not? by Darrow Kirkpatrick of CanIRetireYet.com. And I'll be right back with my commentary. I spend my day reading, recording, and keeping information organized.

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[00:10:13] I just don't want keeping track of them to become a second job. I like that it doesn't just show what I've spent, it helps me plan bigger purchases and see whether I'm on track while there's still time to adjust. And the AI weekly recap flags spending spikes and upcoming expenses. It's like having a financial advisor in my pocket, a heads up instead of another spreadsheet to manage. Write your own money story with Monarch. Use code OPTIMAL at monarch.com

[00:10:43] to get your first year of Monarch Core half off at just $50. That's 50% off your first year at monarch.com with code OPTIMAL. Thank you to Darrow. The map versus trip analogy is a good one. I think that's true of almost any plan we make with money, not just retirement. We build the spreadsheet, come up with numbers, and so on. But who knows what happens along the way?

[00:11:10] The part about spending dropping off later in life is interesting too, because it runs against what most of us are afraid of. I think a lot of us assume the costs only go up from here, with health expenses and so on. So we aim higher, work a little longer, and push the data out again. And maybe that is the right call for some of us, but it's worth taking the time to consider. And I agree.

[00:11:38] It's all about staying flexible. Because you really can't predict any of it. Not the market, not your health, not what you'll even want at a certain age. What you can control is a lot of your spending. When the majority of your money is going to fixed things every month, a bad year is, well, really bad. When it isn't, you can adjust. And being able to adjust is a great skill to have.

[00:12:06] So maybe the more useful question isn't whether you have the right number, it's how much of what you spend every month you could actually change if you had to. So thank you to Darrow for the reminder. And thank you, I appreciate you being here and listening every day. Have a great rest of your day, and I'll see you tomorrow, where optimal life awaits.