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America has millions more millionaires than it did a generation ago. But income, lifestyle and wealth are still very different things—and helping clients understand the distinction can lead to better conversations about spending, family and financial independence.
Human nature is funny.
Even when we are doing well financially, many of us remain quietly curious about the people living around us.
How much did the neighbors pay for their house? Are their property taxes higher than ours? How often do they go out to that expensive steakhouse? Did they really just buy another new Land Rover? How are they paying tuition for two children in college? Are they invested in crypto? What could they get for their house if they sold it tomorrow?
And did they actually spend $20,000 on that landscaping project?
We are not necessarily nosy neighbors. We are human.
The problem is that what we see from the curb may tell us remarkably little about the financial condition of the family living inside the house.
The couple with the beautiful home, new SUV, club membership and frequent European vacations may indeed be wealthy. Or they may be spending aggressively to maintain a lifestyle supported by high income, leverage and very little financial margin.
Meanwhile, the neighbor driving the 10-year-old Toyota, mowing his own lawn and quietly running a successful business may be sitting on the stronger balance sheet.
That contrast is at the heart of The Millionaire Next Door, the 1996 personal-finance classic by Thomas J. Stanley and William D. Danko.
Nearly 30 years later, its central idea still resonates: Looking wealthy and being wealthy are not the same thing.
Many truly wealthy families build their financial lives quietly. They accumulate through discipline, restraint, thoughtful investing, tax awareness and a preference for financial independence over displaying financial success.
For wealth advisors, that observation may be even more important today.
There Are A Lot More Millionaires Next Door
America has created a remarkable amount of wealth over the past generation.
BusinessStats estimates that roughly 24 million American adults are millionaires in 2026—about 8.8% of the adult population, or roughly one in every 11 to 12 adults. UBS’s 2025 Global Wealth Report estimates that the United States accounts for nearly 40% of the world’s millionaires and added more than 379,000 millionaires during the previous year—more than 1,000 a day on average.
That is a dramatic change from two decades ago.
Growth of U.S. Millionaires Over the Last 20 Years
Sources: BusinessStats and UBS 2025 Global Wealth Report
But there is an important qualifier. A $1 million net worth does not mean what it did 25 or 30 years ago, especially in high-cost housing markets where a substantial portion of household wealth may be locked inside a primary residence.
Nor does reaching seven figures automatically mean a household has sufficient liquidity, a sustainable retirement income strategy, tax efficiency, appropriate investment diversification or a thoughtful estate plan.
Becoming a millionaire is one financial milestone, staying financially secure is another.
Income Is Not Wealth
One of the most useful concepts in The Millionaire Next Door is the distinction between people who earn well and people who accumulate well.
Stanley and Danko divided households into two broad groups.
Under Accumulators of Wealth, or UAWs, may earn very good incomes but accumulate relatively little because a large portion of those earnings is consumed by lifestyle.
Prodigious Accumulators of Wealth, or PAWs, are unusually effective at converting income into lasting wealth.
They are not necessarily the people earning the most money.
They are frequently the people doing the best job of keeping, investing and stewarding what they earn.
The authors even proposed a simple rule of thumb:
Expected Net Worth = Age × Pre-Tax Annual Income ÷ 10
Someone with twice the expected net worth or more could be considered a Prodigious Accumulator. Someone with less than half might fall into the Under Accumulator category.
It is obviously an imperfect formula.
It does not account well for inherited wealth, geographic cost differences, career interruptions, divorce, major health expenses or the unique economics of business ownership. An advisor would never substitute it for serious planning.
But that is almost beside the point.
Its enduring value is the question underneath it: How much of the financial opportunity created by your income are you converting into durable wealth?
That can be a surprisingly productive discussion with affluent clients.
Five Lessons That Still Matter
1. Play defense as well as offense
High income creates opportunity. But lasting wealth ultimately depends on what remains after spending, taxes and lifestyle costs.
Investment performance certainly matters. But household behavior can determine whether capital compounds for decades or slowly leaks away through a series of seemingly reasonable spending decisions.
Many affluent households do not run into trouble because of one spectacular mistake.
It is lifestyle creep. The bigger house. The second house. Another vehicle. Club memberships. Tuition. Travel. Renovations. Support for adult children.
Each decision may be affordable independently but the real financial question is what happens when they are stacked together.
2. Be careful about status spending
There is nothing inherently wrong with a Land Rover, expensive watch, country club or beautifully renovated kitchen.
The issue is whether those purchases are expressions of genuine priorities or reactions to social comparison.
That distinction is particularly important for HNW families because spending can increase almost indefinitely as wealth increases.
The goal is not austerity, it is intentionality. Money should support a client's values rather than quietly become a scorecard for comparing their life with somebody else's.
3. Spend time managing wealth—not just making it
Many successful people devote enormous energy to earning money and surprisingly little time to coordinating the wealth they have accumulated.
That is where advisors can provide tremendous value.
Tax strategy, investment management, insurance, estate planning, charitable giving, Social Security, business succession and family gifting rarely operate independently.
As wealth grows, coordination becomes increasingly important.
The millionaire-next-door mindset is not simply about saving money. It is also about being a thoughtful steward of capital.
4. Think carefully about “economic outpatient care”
Stanley and Danko used the memorable phrase “economic outpatient care” to describe ongoing financial support provided to adult children.
For affluent families, generosity can be one of wealth's greatest privileges.
But generosity without structure can have unintended consequences. A gift that helps a child buy a first home can be transformative. Repeated financial rescues, however, can sometimes reduce independence, complicate family relationships or create unequal expectations among siblings.
The important question for clients isn't simply, “Can we afford to help?” It is: “What kind of help is most likely to strengthen the person we're helping?”
5. Recognize that wealth creates complexity
As families accumulate more wealth, financial decisions often become less about maximizing an investment return and more about coordinating competing priorities.
How much should go to children?
How much to grandchildren?
How much should be spent now?
Should appreciated assets be gifted to charity?
Does the estate plan still reflect family circumstances?
Could taxes be reduced through better coordination?
Financial independence gives families choices. But those choices frequently require more—not less—planning.
The Millionaire's Other Problem: Learning to Spend
There is another dimension of the millionaire-next-door personality that advisors increasingly encounter in retirement.
Some people become so good at accumulating wealth that they have trouble spending it.
San Diego-based Taylor Schulte is the founder & CEO of Define Financial and host of the Stay Wealthy Retirement Show podcast and says that reluctance often has deep roots. “Many diligent retirement savers spend 30 or 40 years being rewarded for saving, delaying gratification, and being careful with money,” says Schulte. Those behaviors do not suddenly disappear at retirement. For some clients, they began in childhood after watching parents struggle financially or growing up in households where spending was considered irresponsible. Schulte compares it to exercising a muscle: retirees may have spent decades strengthening their saving muscle while barely using their spending muscle.
Sometimes the conflict becomes visible only when a client faces a meaningful purchase. Schulte points to a retired client who had dreamed for years about owning a small home within walking distance of the beach. Financially, the couple could afford it. Emotionally, spending a meaningful portion of a nest egg accumulated over 30 years was much harder. Schulte's firm spent roughly two years modeling scenarios and discussing the decision before the clients felt comfortable moving forward. “Whether it's a few hundred dollars of electricity or a multi-million dollar beach house,” Schulte says, people who have spent decades being careful with money “don't automatically trust that it's okay to enjoy it, even when the math says so.”
That is where an advisor can become more than the person running the projections. Schulte's team stress-tests plans for market declines, inflation, healthcare, long-term care and other risks. But once the numbers demonstrate that the client can afford the spending, another Monte Carlo simulation may not solve an emotional problem. Sometimes, Schulte says, what retirees need is a trusted professional who can tell them: “We've looked at this carefully. You're okay. You can spend the money.”
That may be one of the more underappreciated roles of an advisor working with wealthy retirees.
The goal is not simply to protect assets; it is to help clients use those assets to build the life the assets were accumulated to support.
Schulte's firm sometimes asks clients to bring in their “dream scenarios”—even ideas they initially consider extravagant—and then models them.
Attaching actual numbers to the dream can transform the discussion. A second home, extended family trip or gift to children stops being a vague threat to financial security and becomes a planning decision.
His firm also uses structured monthly retirement distributions that arrive in a client's checking account much like a paycheck. For lifelong accumulators, turning portfolio withdrawals into regular income can make spending feel less like repeatedly raiding investments and more like using the retirement income the portfolio was designed to produce.
Five Conversations to Have With Clients
The renewed relevance of The Millionaire Next Door gives advisors an opportunity to move beyond portfolio performance and ask questions that reveal how clients actually think about wealth.
Here are five worth exploring.
1. “When you picture someone who is financially successful, what do you see?”
The answer can reveal whether a client's definition of success is built around independence, security, experiences, status, generosity—or comparison with peers.
2. “What are you still saving for?”
This can be particularly revealing for retired clients who have accumulated more than they are realistically likely to spend. Is continued accumulation serving a specific purpose—or simply continuing a 40-year habit?
3. “What would you spend money on today if you knew it could not derail your financial plan?”
This brings spending guilt and unspoken aspirations into the planning conversation. The answer may be travel, a home renovation, helping children, relocating or simply spending more freely on everyday life.
4. “What do you want your money to accomplish for your family?”
This opens the door to conversations about gifting, education, inheritance, philanthropy and economic outpatient care—and whether family support is helping create capability or dependence.
5. “Which parts of your lifestyle matter most to you—and which are mostly habit?”
Lifestyle expenses are not automatically excessive simply because they are large. The more useful distinction is between spending that genuinely enriches a client's life and spending that continues because it has become expected.
These conversations help turn a financial plan into something more valuable than a collection of projections. They connect money with behavior.
The Millionaire Next Door May Be Your Client
You cannot know very much about your neighbors simply by looking across the street.
The visible trappings of wealth do not necessarily reveal sustainable wealth. Some people who appear rich may carry substantial debt and financial stress. Others who live comparatively modestly may have quietly accumulated financial independence over several decades.
And sometimes the person with considerable wealth is wrestling with an entirely different problem: Giving themselves permission to enjoy it.
That is why the lessons of The Millionaire Next Door still matter for advisors nearly three decades after the book was published.
Restraint matters. Saving matters. Common sense matters. Investing matters.
But eventually, using wealth well matters too.
For advisors serving affluent families, perhaps the bigger opportunity is helping clients find the appropriate balance between the two—to accumulate enough to create independence, but not become so attached to accumulation that they forget why they built the wealth in the first place.
The millionaire next door doesn't have to look rich.
But with good planning, perhaps they can learn how to live richly.
Related: Retirement Fears Are Cooling. Here’s How Advisors Can Turn Anxiety Into Action