Our approach to Retirement Income Planning involves more than just focusing on replacing a paycheck. We’ve built our probabilistic approach on the premise that a Retirement Income Planning system works better when it can support spending amid market swings, inflation, taxes, and a retirement that may last for decades. We need to stop pretending that a reliable retirement income strategy can be built around a single rule or withdrawal percentage. It is built through coordination. A durable plan typically brings together at least the following moving parts:
- Income sources such as Social Security, pensions, or other recurring payments
- A clear, tax-efficient withdrawal approach across different account types
- Cash reserves to manage short-term needs
- Ongoing adjustments as markets and life circumstances change
A truly sustainable and reliable retirement income strategy is one that can adapt over time without forcing disruptive spending decisions at the wrong moments.
Start With the Income Gap You Need the Portfolio to Fill
We have observed that many people just do not like to analyze every single expense item they incur. After all, when you were working for a paycheck, you knew quickly if you were spending too much money on something. You knew what you made. If there was no money left before the month ended, you were spending too much, and you made a budget. This is easier when one side of the equation (your paycheck) is known and somewhat predictable.
When you move from earning a paycheck to replacing a paycheck, your portfolio and other resources now become the primary driver to determine your spending capacity. Many of these resources don’t produce a steady, predictable income like your former employer. An income gap is caused when the income derived from your financial resources is less than what you need to spend. This is obvious, but it is important to first get a good idea of what that income gap will be. It will tell you not only the stress and demand that will be put on those resources early on, but also the sustainability of the financial resources for your lifetime. Start by identifying those reliable income sources and essential spending needs. This would include items such as:
Income – Annuities, Pensions, Social Security, other recurring payments
Expenses – Housing, food, health care, and other family members.
This will better answer the question “How much income must come from my portfolio each year?” At this point, the focus shifts from how much you have saved to how much pressure your portfolio must absorb.
Build the Strategy Around Income Stability, Not Just Account Balances
Our architectural approach to designing a retirement plan is not based so much on the size of the portfolio. We have seen that what matters more is how reliably the portfolio and other resources can generate income over time. The uncomfortable question that most retirees gloss over is how stable and adaptable the income produced from their portfolios can be across different market conditions. We have yet to hear of a retiree who enjoys being told, after 5 years of retirement, that they have to spend less money.
First, recognize that not all dollars in a portfolio serve the same purpose. Some assets are better suited to support near-term spending, while others are intended to grow and support future income needs. When these roles are clearly defined, the portfolio becomes more than a pool of investments; it becomes a layered income system.
A more resilient approach allows for adjustments over time, such as:
- Establishing broader spending “guardrails” that can be tweaked or slightly adjusted along the way.
- Adjusting which accounts are used for income depending on conditions.
- Stress tests of prior market environments ahead of time in order to provide a better understanding of the possible range of future outcomes.
Stability does not mean you can only withdraw an exact amount, to the penny, every month. It is more about staying close to the most likely income withdrawal amount that your resources have the capacity to provide, given historical markets and your sustainability needs. It is about having predefined flexibility so future decisions are not made under pressure.
The nuance that we sometimes forget is that retirement planning should be less about optimizing to a number or specific withdrawal rate and more about designing a system that can continue working when markets and life inevitably change.
Decide How Withdrawals Will Happen in Real Life
A more reliable approach starts by recognizing that not all accounts should be used the same way. Different account types (taxable, tax-deferred, and Roth) each play a distinct role in a retirement income strategy. Rather than drawing from them randomly, withdrawals are more effective when coordinated with a broader plan.
For example:
- Taxable accounts may provide flexibility early in retirement, especially before required distributions begin
- Tax-deferred accounts can be managed to control future tax exposure and required minimum distributions
- Roth assets may serve as a reserve for later years, unexpected expenses, or tax-efficient withdrawals
The goal is not to follow a rigid sequence, but to create a decision framework that adapts to changing conditions in tax brackets, market environments, and future income needs.
Equally important is how withdrawals interact with market behavior. One of the most common risks in retirement is being forced to sell investments during a downturn to meet spending needs. This is where cash reserves or short-term assets play a key role. By setting aside funds for near-term income, retirees can reduce the need to draw from more volatile investments at unfavorable times.
Prepare the Plan for the Risks That Cause Retirement Income Plans to Break Down
A nuance that rarely makes headlines is that most investment plans do not fail because of a single event. More often, a retirement income plan breaks down when multiple risks interact over time, especially when those risks are not fully accounted for in advance.
Some of the most important risks that cause a plan to break down include:
- Sequence-of-returns risk. When withdrawals begin at the same time that markets decline, the impact can be magnified. Losses reduce the portfolio balance, and ongoing withdrawals compound that effect. Even if markets recover later, the portfolio may have less capital remaining to participate in that recovery.
- Inflation over a long retirement horizon. While inflation may seem manageable in any single year, its cumulative effect can be significant. A plan that works well today may gradually lose purchasing power if income does not adjust over time.
- Longevity and healthcare costs. It is important to consider not only your longevity, but the longevity of loved ones who will depend on your resources after you are gone. In addition, healthcare expenses, particularly later in life, can be unpredictable and difficult to fully plan for. These factors require a strategy that maintains flexibility and reserves capacity for future needs.
- Spending shocks and family changes. Supporting family members, changes in housing decisions, widowhood, or shifts in lifestyle can all alter spending patterns. These are not outliers; they are common realities that many retirees face over time.
A reliable income strategy does not attempt to predict each of these risks precisely. Instead, it is designed to withstand them collectively. This may include maintaining flexible withdrawal strategies, holding appropriate reserves, and structuring the portfolio in a way that can adapt as conditions change.
Monitor and Adjust the Strategy Over Time
A retirement income plan is not a one-time decision. It is an ongoing process that evolves as markets change, tax rules shift, and personal circumstances develop over time.
Even a well-designed strategy will drift if left unattended. Investment returns will vary, spending patterns may change, and income sources such as Social Security or required minimum distributions (RMDs) will come into play at different stages. Without periodic review, a plan that once felt aligned can gradually become less effective.
A productive review process looks at:
- Whether withdrawals remain aligned with the portfolio’s current value
- How spending compares to original expectations
- Changes in tax brackets, income sources, or legislation
- Portfolio allocation and whether it still reflects the intended risk level
One practical way to manage this balance is through spending guardrails. Rather than maintaining a fixed withdrawal regardless of conditions, guardrails allow for modest adjustments:
- Reducing discretionary spending during prolonged market declines
- Allowing for increased spending when portfolio performance is strong
- Adjusting withdrawal sources to improve tax efficiency over time
These adjustments are not meant to be frequent or reactive. They are designed to provide structured flexibility, so small changes can be made earlier rather than larger, more disruptive changes later.
Retirement income planning also tends to shift in phases. Early retirement may rely more heavily on portfolio withdrawals. Later, Social Security benefits, pensions, or RMDs may take on a larger role. Spending patterns may also evolve, often declining in some areas while increasing in others, such as healthcare.
In the end, the strength of a retirement income strategy lies not in getting every assumption exactly right, but in having a process that can adjust thoughtfully over time. Small course corrections, made consistently, can help preserve stability and reduce the risk of larger problems emerging later.
Reliable Retirement Income Strategy FAQs
1. How much can I safely withdraw each year in retirement?
There is no single withdrawal rate that works for everyone. The “safe” amount depends on your time horizon, market conditions, spending flexibility, and how your portfolio is structured. Rather than relying on a fixed percentage, a more reliable approach adjusts withdrawals over time based on portfolio performance and evolving needs.
2. Should I take Social Security earlier to reduce pressure on my portfolio?
It depends on your broader financial picture. Taking Social Security earlier can reduce withdrawals from your portfolio in the short term, but it may result in lower lifetime benefits. Delaying benefits can provide a higher guaranteed income later. The decision should consider longevity expectations, income needs, and how it fits within the overall income strategy.
3. Is the 4% rule enough to build a retirement income plan?
The 4% rule can be a useful starting point, but it is not a complete plan. It does not account for taxes, changing market conditions, flexible spending, or multiple income sources. A reliable strategy typically requires a more dynamic approach that adjusts over time rather than relying on a fixed rule.
4. How much cash should I keep in retirement?
Cash reserves are often used to support near-term spending and reduce the need to sell investments during market downturns. The appropriate amount varies, but many strategies include one to several years of expected withdrawals in more stable assets. The goal is to create flexibility, not to eliminate market exposure entirely.
5. Which accounts should I withdraw from first in retirement?
There is no universal order that applies in all situations. In some cases, it may make sense to draw from taxable accounts first, while in others it may be more efficient to manage tax-deferred or Roth accounts strategically. How you decide to withdraw funds should reflect current tax brackets, future required distributions, and long-term tax planning.
6. How often should a retirement income strategy be updated?
A retirement income plan should be reviewed regularly, but not constantly adjusted. Annual reviews, or updates following meaningful life or financial changes, are typically sufficient. The focus should be on maintaining alignment with long-term goals rather than reacting to short-term market movements.
How We Help Build Retirement Income Plans That are Meant to Last
Careful planning of the interactions and inter-dependencies of all your sources of retirement income can create a coordinated income strategy. But all these sources, and their unique risks and trade-offs, should always be evaluated together. We have found that through an ongoing process of monitoring and adjusting as needed, retirees can have more confidence as reality unfolds during their retirement. Reach out to us if you want more confidence in the retirement income plan you’ve designed.
Bob Porter is the President of Porter Investments. Porter Investments is a fiduciary investment management firm based in Houston, Texas, helping self-directed and hybrid investors gain professional guidance and grow their portfolios with tactical strategies. Bob's prior work at Fidelity Investments allowed him the opportunity to advise and study a diverse group of investors.
