A practical way to think about retirement income

If you did everything right—saved consistently, invested wisely, built up a solid portfolio—isn’t it normal to ask to know much you could safely spend from your savings?

That’s the question the 4% rule was designed to answer.

And for decades, it’s been one of the most widely used guidelines in retirement planning.

And like most rules of thumb, it can be helpful.  But it’s not complete.

Where It Came From

In the early 1990s, financial planner William Bengen asked a deceptively simple question: 

  • How much can someone withdraw from their portfolio each year without running out of money?

After analyzing decades of historical market data, his answer became what we now call the 4% rule — withdraw 4% of your portfolio annually, adjust for inflation each year and historically, the portfolio lasts about 30 years – statistically.

Later research, including the widely cited Trinity Study, reached similar conclusions.

And the rule stuck.

Why It’s Useful

The 4% rule gives people something genuinely valuable: a starting point.

It translates a portfolio balance into a rough income estimate in a single step:
A million dollars is roughly $40,000 a year.
Five hundred thousand becomes about $20,000.

That simplicity makes it powerful for answering early planning questions:

  • Am I on track? 
  • How much do I need? 
  • What’s realistic? 

And importantly, it’s grounded in historical data—not guesswork.

What It Doesn’t Solve

The 4% rule is built on history—not on what markets will do going forward.

It shows what worked in the past, but it can’t predict future conditions. And that’s where things can risk breaking down.

Even when two retirees experience the same average return over 30 years, their outcomes can look very different.

Why? Returns don’t arrive evenly over time—and the order matters.

This is known as sequence of returns risk.

When markets perform well early in retirement, a portfolio has time to grow and support withdrawals.  When markets decline early, those same withdrawals come from a shrinking asset base. Shares are sold to cover expenses — and can’t participate in the recovery.

That combination of losses and withdrawals can create lasting damage.

Not because of poor decisions. But because of bad timing.

A retiree who entered retirement around the dot-com crash and then faced 2008 experienced a fundamentally different reality than someone who retired into a strong market cycle.

Same rule. Same math. Very different outcomes

So Does the 4% Rule Still Work?

Yes — as a guideline. But it comes with two important caveats:

First, it’s not a guarantee – the data supporting this rule is historical and reflects a period of U.S. market performance that may not repeat going forward.

Second, it assumes the portfolio does all the work — which means income depends heavily on the timing of market returns, a variable no one can control.

These caveats can be a meaningful source of uncertainty. Even when the numbers look fine on paper, the experience of relying entirely on the portfolio for income can feel precarious.

A Stable Starting Point

Instead of asking “how much can I safely withdraw?” a more practical question is: “how much of my spending can I cover without relying on the market at all”?

That’s the foundation of “baseline income planning”.

The idea is straightforward — use reliable income sources like Social Security, pensions, or structured income to create an income floor to cover essential expenses first, so the portfolio handle growth and flexibility.

When essential expenses are covered by income that doesn’t depend on market performance, the dynamic shifts meaningfully. There’s no longer pressure to sell investments during a downturn. The portfolio has runway to recover. And the impact of sequence risk is significantly reduced.

The framing changes from “my portfolio has to fund everything” to “my income covers what I need, and my portfolio supports what I want.”

That distinction is often worth more than any withdrawal rate.

Where the 4% Rule Fits

The 4% rule still has a place.  It serves as a guideline for a maximum sustainable withdrawal rate, and it works best when applied to assets intended for discretionary spending, not essential income.  

In that context, it remains a useful and historically grounded tool.

But it shouldn’t be asked to do more than it was designed to do.

The Bottom Line

You can’t control what markets do — or when they do it.

But you can control how much your retirement depends on them.

A plan anchored by reliable income—with the portfolio in a supporting role—doesn’t remove uncertainty.


But it does help manage sequence risk, preserves the integrity of growth assets, and introduces a level of income predictability most retirees are looking for.

And that’s often the difference between having a plan… and having confidence in it.

Next Steps

If you’d like to better understand how the 4% rule and sequence risk impacts your retirement:

  • Start a conversation → (Scheduling link) 
  • Reach out directly with questions → (Phone, Email, Social links) 
  • Review our other articles → (Link to blog page)