ESP Income System: Turning a Portfolio into Sustainable Lifelong Spending

Turning a portfolio into a reliable lifelong income stream has always felt a bit murky to me, especially since my household will not have a pension. This post is my attempt to “systematize” that process.

Obviously, there are millions of retirees already doing this, and plenty of literature on the subject. Tools like Boldin and FI Calc do an excellent job of mapping the landscape, but I found myself overwhelmed by all the options.

I’m a simple person who prefers simple rules, so I built a wabi-sabi calculator to guide my annual spending. The calculator appears below. Everything that follows explains the well-researched withdrawal strategies that drive its inputs and outputs.

The calculator is used only once per year and requires just four inputs, all of which should be easy to pull from your brokerage statements.

• Current Total Liquid Portfolio Value as of today
• Total Liquid Portfolio Value on the same day of last year
• Silo Cap (more on what this means later)
• Current Silo Value

Enter the four values and click “Calculate”. That’s it!

Everything that follows explains why I trust this output, and the financial framework that sits inside it.

Principles for Sustainable Spending

Instead of wrestling with complicated retirement calculators, I backed up and defined what I needed my portfolio to actually do. From there, I structured an underlying system that’s easy to remember and even easier to follow.

The portfolio, the income system, and the calculator behind it must satisfy these prinicples:

• Survivability: Provide for my family for the rest of my life, across a wide range of market conditions.
• Income: Support go-go years and no-go years as income needs evolve.
• Purchasing power:  Inflation is the silent killer of wealth, so long-term buying power requires meaningful exposure to growth assets.
• Protection during market stress: I need a structure that lets us draw income without being forced to sell equities at the worst possible time.
• Leave a legacy: Leave a meaningful bequest to our children.
• Wabi-Sabi simplicity: Clear rules that work in euphoric markets and brutal ones, and protect me from my own worst instincts.

After evaluating these criteria, it became clear that the retirement strategies most aligned with my goals were the famous 4%-Rule and the 3-Bucket Strategy.

Many better blogs have already covered the mechanics, so I won’t detail them here. Essentially, the 4%-Rule proposes an upper bound on how much to safely spend, while the 3-Bucket framework addresses where that spending should come from to manage risk and preserve capital.

From Two Retirement Frameworks to One Household System

These two well-tested strategies gave me confidence in the math behind their long-term viability and made safe withdrawal concepts easier for me to grasp. However, the 4%-Rule and 3-Bucket frameworks do NOT respond to how a year actually felt to live through. More importantly, they do not address my own behavior in a crash, which ultimately determines whether any plan survives real market conditions over time.

To manage that behavioral problem, I tied the 4% Rule and the 3-Bucket strategy into a framework that looks at the year that just ended and answers two pragmatic questions::

• Given what just happened, how much is reasonable to spend next year?
• Where should that money come from?

I run the calculator once per year on the same date, around December 15. Internally, it computes Household Return and uses that single number to set reasonable spending limits and determine the source of funds for the year ahead.

What I Mean by “Household Return”

Household Return is the change in our total liquid assets over the past year. It includes everything that financially happened in our household since last December, including the actual spending decisions we made based on the prior year’s rule.

It is net of real life and includes:

• Spending we chose or were required to make, including taxes
• Dividends, interest, capital gains, gifts, and other income
• Cash we reinvested or chose NOT to spend

Household Return is retrospective. It’s not a forecast, and it deliberately excludes illiquid or lifestyle assets like our home or vehicles. This is not a market benchmark like the S&P 500, but a family benchmark. Household Return is my lived, real-world result.

What follows is how I synthesized the 4%-Rule and 3-Bucket strategy into a single Household System that fits my risk profile, my level of net worth, and my personality.

And that begins with the name “3-Bucket“. 

When I hear bucket, I picture a static container, and I hate that. Instead, I needed a mental model that treats the portfolio as a small, self-contained economy, with distinct roles for longevity, protection, and immediate needs.

I call that system ESP, short for ESTATE-SILO-POT.

Estate–Silo–Pot: ESP Income System

It would be cool if ESP was some sixth sense to predict market conditions. Sadly, it’s not. It’s just my attempt at reframing the 3-Bucket system into a more intuitive metaphor: Estate–Silo–Pot.

At its core, the portfolio becomes a self-contained economy with three distinct parts. Each part has a single job. No part is allowed to do more than one job. That constraint is intentional and essential.

I’m a visual person, and this metaphor helps me separate growth, protection, and spending in a way that reflects how money actually behaves in my household over time. Here are the three parts.

ESTATE: Built for Growth & Longevity

I visualize the Estate as productive lands. Equities are the crops growing on it. Most years they’re flourishing. Some years, they’re struggling. But over time, they tend to produce abundance.

The Estate is the equity portion of the portfolio. Its job is to compound. It is not an emergency fund, and it is not a spending account.

Just as a farmer wouldn’t sell off land during a bad harvest, the single most important rule of the ESP system is the same:

Do not sell the Estate during bad market years.

Everything else in the system exists to support that rule.

• Purpose: The engine of future wealth that supports spending and protects purchasing power
• Composition: Diversified Low-cost Equity Funds
• Timeframe: Long term horizon
• Considerations: Volatile year to year, which is why we have a Silo
• Rule: Protect the Estate by never selling in down years

SILO: Built for Storage & Protection

I visualize the Silo as protected storage, holding roughly 10 years of “rice” to feed us during periods when the Estate’s yields are poor. It is not meant for growth. Its job is preservation.

The Silo exists for one reason alone: SURVIVABILITY.

Its sole job is to fund the Pot when markets are down, so the Estate never has to be sold at the worst possible time. Like real silos, it has a designated max capacity or Silo Cap. There is no need or reason to fill it beyond that cap. For me, that cap is $1M, or roughly 10-years of spending. That’s just my number for safety. Your level should reflect your own age and comfort with risk.

And just as you wouldn’t store your rice in a fragile, leaky granary, these funds belong in the strongest storage available. For me, that means U.S. Treasury securities.

• Purpose: Feed the Pot when the Estate has a bad year.
• Composition: U.S. Treasury Bills & Notes
• Timeframe: 10-years of spending as a safeguard against an extended market downturn
• Considerations: Drawn down during bad harvests and refilled during good ones
• Rule: Refill from abundant Estate harvests when conditions improve

POT: Built for Living & Enjoying

I visualize the Pot as the point where we eat. This is where life actually happens. It’s filled annually from either Estate surplus or Silo reserves, and then intentionally consumed over the course of the year.

The Pot is not precious. It exists to be spent and enjoyed, not to be hoarded. It should feel comfortably “not empty”, or maybe about two-thirds full most of the time.

It contains roughly three years of annual spending, but we are deliberately Wabi-Sabi about the precision here. This is money for the present moment, in service to a life well-lived.

• Purpose: To live and enjoy life
• Composition: Cash and Government Money Markets
• Timeframe: The top of the Pot is this year’s spending
• Considerations: The bottom of the Pot (about 5% of net worth) is a buffer for life events
• Rule: Do not hoard this money. Use it!

Deciding How Much to Sustainably Spend Each Year

The Estate, the Silo, and the Pot describe the structure of my retirement system. What they don’t answer is the hardest question in retirement: how much can I safely spend this year without damaging the Estate?

I’ve learned the hard way that I’m not good at answering that question. The 4%-Rule provides reasonable evidence for a safe 30-yr retirement, but I’m much more conservative when I think in terms of the rest of my life. I also know that in a market crash, I will be deeply reluctant to sell 4% of my portfolio just to satisfy a rule.

I needed an impartial way to look back at the year that just happened and let that lived reality set reasonable limits for the year ahead.

To do that, I reduce each year’s condition to a simple label I can remember and respect. That mechanism is what I call the Market Animal Spending System (MASS).

The Market Animal Spending System (MASS)

Each year during the third week of December, I measure our Household Return from December 15th of the previous year to December 15th of the current year. Based on that single number, I assign the year a “Market Animal” and then follow its spending rules deliberately and without second-guessing.

There are four different Market Animals, each representing a different market condition.

Bull Market

We all know and love the Bull, because this is the Market Animal that does triple duty by increasing the Estate, refilling the Silo, and filling the Pot.

Bull years are periods of abundance. Estate yields are plentiful, resilience can be rebuilt, and life can be enjoyed a little more freely. 4.5% of Total Liquid Portfolio Value (TLPV) is harvested and goes to the Pot for spending. If needed, the Silo is refilled with 1% of TLPV or up to its designated cap. The remainder is reseeded into the Estate for future compound growth. I’m aware that this is more than the traditional 4% that has been long advocated. I’m OK with this. My Bull Year spending amount sits comfortably within updated research by William Bengen, but more importantly, the system never lets a good year set permanent expectations.

• Bull Market Definition: Annual Household Return > 6%
• Allowed Spending: 4.5% of Total Liquid Portfolio Value (TLPV)
• Source of funds: Estate harvesting (selling appreciated equities)
• Also Allowed: Refill the Silo 1% of TLPV or up to its designated cap

Lamb Market

Lamb Markets represent normal, sustainable conditions that most retirement plans typically assume will happen forever.

Lamb markets provide steady, adequate income while allowing the Estate to continue growing overall. These are “normal” markets in which 4% Pot spending is completely supported by modest growth in the Estate. In Lamb years, live off the Estate and gradually top up the Silo before reseeding the Estate.

• Lamb Market Definition: Annual Household Return is between 4-6%
• Allowed Spending: 4.0% of total portfolio, reflecting a little caution
• Source of funds: Estate harvesting
• Also Allowed: If Household Return exceeds 4%, the excess may be used to refill the Silo by up to 1% of the portfolio. Any remaining return stays invested in the Estate.

Pig Market

Pig Markets are sluggish and stubborn. Progress is slow and momentum is unreliable. Discipline matters more than optimism.

Pig years are about patience and proper sourcing of funds. The goal is to maintain steady spending without drawing down the Estate during weak or uncertain conditions. Spending levels are reduced to reflect the sluggish nature of the market.

• Pig Market Definition: Annual Household Return is between 0-4%
• Allowed Spending: 3.5% of total portfolio, reflecting caution of a down market
• Source of funds: Mixed based on return strength
• Sourcing Logic:
  • If Household Return is greater than 3.5%, spending is funded entirely through limited Estate harvesting
  • If Household Return is less than 3.5%, Estate harvesting is capped at the Household Return, and the remainder (up to 3.5%) is funded from the Silo
  • No refill of the Silo in Pig years

Bear Markets

We all know the Bear, and though we may not like it, we don’t fear it, for it’s periodically expected. Bear Markets are periods of outright portfolio decline. From a retiree’s perspective, any year in which the portfolio shrinks demands maximum caution.

In Bear years, the Estate is deliberately protected. No harvesting and no exceptions. We draw exclusively from the Silo and give the Estate time to recover. This is not a time to panic. It’s a time to be patient. The Silo gives us that luxury.

• Bear Market Definition: Household return is below 0%
• Allowed Spending: 3.0% of total portfolio, reflecting some belt tightening
• Source of funds: Silo only
• Not allowed: No refilling of the Silo in Bear years

Example: Using MASS ESP to Determine Sustainable Spending

Table 1: MASS Rules Summary

Worked Example Using Assumed Portfolio Values

TLDR: MASS + ESP to Determine Income & Source of Funds

It always helps me to think of our portfolio as its own self-contained economy.

• The ESTATE is the growth engine for longevity and protection against inflation. Harvest only what you need and let it support your life. Protect it in bad years.
• The SILO is for storage, and Estate protection during poor harvest years. You should assign a designated max capacity amount in your Wealth Philosophy Statement. Strive to keep the SILO topped up to this designated cap.
• The POT is simply the upcoming years’ money to be spent without worry, plus some cushion.

Once you know your Market Animal, follow the matching flowchart below.

BULL Market ESP diagram to determine income & source of funds

LAMB Market ESP diagram to determine income & source of funds

PIG Market ESP diagram to determine income & source of funds

BEAR Market ESP diagram to determine income & source of funds

Conclusion

Ultimately, what am I doing here?

Let’s be clear: the MASS ESP Income System is a spending governor. It uses deliberately coarse spending bands that respond to actual household reality. It relies on the retirement research of the 4% Rule and 3-Bucket strategy, while rejecting blind adherence to a static withdrawal rate in favor of contextual spending limits shaped by what the portfolio has actually endured.

In good years, we get a bonus. In bad years, we tighten the belt a little.

This “real life” orientation makes the system more conservative in down markets, so in that sense, it’s also a behavioral governor. This system protects me from my own worst behavior, in a genuflection to Daniel Kahneman’s conclusions about human decisions in economic uncertainty. I have high confidence that the annual spending outputs of this system can be spent freely, without anxiety of running out of money.

For me, the MASS ESP system is best understood as a practical metaphor. It produces actionable information that allows me to live stress free, while remaining mindful of the central importance of maintaining a healthy portfolio. Like all metaphors, it does have limits, but I deliberately accept those limits in service of simplicity and usability.

One such limitation is that the system does not explicitly adjust the Silo Cap value for inflation, which can erode purchasing power over time. I accept this tradeoff in favor of simplicity, trusting that I can absorb this imprecision through a Wabi-Sabi approach rather than false precision.

Another omission is Social Security. I exclude it here not because it is unimportant, but because claiming strategies can be so profoundly personal and complex. For my household, it will function as additional gravy independent of the system, which can be spent (or invested) freely when the time comes. This keeps the ESP System conservative, which aligns with my nature.

A third limitation is that this system does not attempt to address asset allocation or tax location, beyond a very broad separation of equities in the Estate, bonds in the Silo, and cash in the Pot. Those decisions are foundational to portfolio construction, but they are upstream of the spending question this framework is designed to answer. I treat these as related but separate topics, and they will be covered in future posts.

Finally, the system does not describe a tax-optimized withdrawal sequence of the annual harvest. In practice, withdrawals are sourced across taxable, tax-deferred, and tax-free accounts in a way that seeks to minimize lifetime taxes and preserve flexibility. Those mechanics matter, but they are execution details, and sit downstream of the spending decision. These details will be covered in a future post.

MASS ESP is deliberately designed to be a simple system that answers two not-so-simple questions:

• How much is safe to spend this year without putting the Estate at risk?
• Where should that money come from?

By adjusting spending to my household’s lived reality, the system reduces (but doesn’t eliminate) sequence risk, preserves the Estate during stress, and increases the probability that the assets outlive me, with meaningful residuals for my children. I can calculate my entire year’s spending in less than 5 minutes, one time per year.

I’m clear-eyed that MASS ESP is not an optimal system (lots of cash drag here). But it is a simple and safe one.

As long as I can live comfortably within annual bounds set by the system, I can spend with joy rather than fear. For me, that alone is priceless!