There's a scene that plays out in kitchens across America, usually around the holidays. You're 28, maybe 31, and someone — a parent, an uncle, a well-meaning family friend — leans across the table and says it: "You really should be buying a home by now."
And the worst part? You feel it. That low-grade guilt that you're somehow behind, that you're throwing money away on rent, that you're failing some invisible timeline everyone else seems to be on.
Haley Sacks — better known as the finance educator Mrs. Dow Jones — wants you to let that guilt go. Not because homeownership is bad. But because the advice you've been handed was written for a world that no longer exists.
The Old Rule: Buy a Home as Soon as Possible
For your parents, this advice made sense. Housing was affordable relative to income. Mortgage rates were manageable. A home was the most reliable wealth-building vehicle a middle-class family could access. Buy young, build equity, retire with your house paid off. Clean, linear, effective.
The problem? That playbook was written for their economy — not yours.
Housing and higher education have never been more expensive. Wages have been lagging behind inflation for years. The "traditional path to the American dream" — go to college, get a job, buy a home, start a family, retire at 65 — feels increasingly like a fantasy for millions of people who are doing everything right and still can't get ahead.
So Sacks, whose new book Future Rich Person is out now, proposes a different rule entirely.
The New Rule: Buying a Home Is a Math Decision, Not a Social-Pressure Decision
Here's the shift that changes everything: a home is not automatically a good investment. It can be — but only when the numbers support it for your specific situation, in your specific market, at your specific moment in life.
When you add up property taxes, interest payments, homeowner's insurance, and maintenance — which Sacks estimates at roughly 1% to 3% of your home's value per year just to keep it running — the true monthly cost of homeownership can be dramatically higher than your mortgage payment alone. On a home with a $5,000 monthly mortgage payment, you could easily be looking at $7,500 a month in real costs once everything is accounted for.
That $2,500 monthly difference doesn't disappear if you rent instead — it can go to work for you. Invested at an average 8% return over seven years, that gap grows to roughly $286,000.
That's not an argument against buying. It's an argument for running your actual numbers before you decide.
And those numbers look radically different depending on where you live. In cities like New York, Los Angeles, or Chicago, people who rent and invest their would-be down payment money are often seeing a much bigger return than if they had bought. In other markets, buying still makes tremendous sense. The math is local. The old advice was universal. That mismatch is where people get hurt.
What "Buying When It Makes Sense" Actually Looks Like
So if the rule is no longer "buy as soon as possible," what replaces it?
A few questions worth running before you make any decision:
1. What are the true costs in your market? Not just the mortgage. Taxes, insurance, maintenance, HOA fees if applicable — what does the full monthly number look like? How does that compare to renting something similar?
2. What would you do with the down payment otherwise? This is the part the old advice skips entirely. If that $80,000 or $120,000 sits in a high-yield savings account or gets invested in low-cost index funds, what does the opportunity cost look like over 5, 7, or 10 years?
3. How long are you planning to stay? The shorter your timeline, the harder it is for the transaction costs of buying and selling to pencil out. The math tends to favor buyers who plan to stay at least five to seven years.
4. Is this a financial decision or a feelings decision? This is Sacks's real challenge to her audience: stop letting social pressure — Instagram real estate agents, family timelines, the vague feeling that you're "behind" — drive one of the largest financial decisions of your life. That's not how wealth is built.
The Bigger Idea Behind the Rule
What Sacks is really arguing is something more fundamental than homeownership strategy. She's pushing back against the idea that wealth comes from following a prescribed sequence of life events on someone else's timeline.
The rules of wealth building have changed. The advice didn't catch up. And most personal finance guidance was built for a linear life — job, house, marriage, retirement, in that order, on that schedule — that fewer and fewer people actually live.
If your life doesn't look linear, your financial strategies shouldn't have to either.
That means buying a home when the math supports it, in the market you're in, on your timeline. Not because a family friend looked at you meaningfully over the mashed potatoes. Not because you feel like you should. Not because everyone else seems to be doing it.
The new rule isn't "don't buy." It's: run the numbers first, then decide.
Haley Sacks (Mrs. Dow Jones) is a finance educator and author of Future Rich Person: The New Rules for Building Wealth (Random House, 2026). Her work has been featured in The New York Times, The Wall Street Journal, and Fortune's 40 Under 40.