In this module we’re going to talk about buying a home. For most Americans, this is the single largest financial decision they will ever make. It’s also one of the most emotional. Homeownership is deeply tied to identity, to stability, to family, to the idea of the American Dream.

But feelings and finances don’t always point in the same direction. And what I want to do is separate the two so you can make this decision with both eyes open. We’re going to look at how mortgage math actually works, the true total cost of homeownership, why renting is not always throwing money away, and how to think about a home purchase as a financial decision, not just a lifestyle one.

And I’ll be honest with you—having purchased homes myself, I can tell you that the housing market makes used car sales look good. The amount of shenanigans that happen on a daily basis, simply because of the sheer dollar amounts at stake, is mind-boggling. So let’s get into it.

The Monthly Payment Trap, Revisited

Now if you remember Module 1, we talked about how car buyers anchor on monthly payments and end up overpaying. With housing, the exact same psychology plays out, except the consequences are dramatically larger.

People say, “If interest rates drop, I can afford more house.” That is exactly backwards. Lower interest rates don’t make homes cheaper. They make monthly payments cheaper, which makes people willing to pay higher prices, which drives prices up. You end up with a bigger mortgage on a more expensive home, often paying just as much or more over the life of the loan.

The right first question is not “What monthly payment can I handle?” The right first question is: what is the right price to pay for this home? Just like with a car: price first, financing second. The order matters enormously.

Mortgage Math — Where your Money Actually Goes

Most people understand that a mortgage is a loan. But fewer people understand how a mortgage actually works month by month. And this is where I want to pull back the curtain a little bit, because this is really important.

On a standard thirty-year fixed mortgage, your monthly payment stays the same for the entire life of the loan. But where that money goes changes dramatically over time. In the early years, the vast majority of your payment goes to interest, not principal. You’re paying the bank. You’re not building equity.

Let me give you a concrete example. Say you buy a three hundred and fifty thousand dollar home. You put twenty percent down, which is seventy thousand dollars. So you’re taking out a two hundred and eighty thousand dollar mortgage at seven percent interest for thirty years. Your monthly payment for principal and interest comes to about eighteen hundred and sixty-three dollars.

Now here’s the part that surprises people. In your very first month, out of that eighteen hundred and sixty-three dollar payment, only about two hundred and thirty dollars goes toward actually paying down the loan. The other sixteen hundred and thirty-three dollars goes straight to the bank as interest. You’re making an eighteen hundred dollar payment and only two hundred and thirty dollars of it is going toward actually owning your home.

And over the full thirty years? The total amount you pay on that two hundred and eighty thousand dollar loan is approximately six hundred and seventy thousand dollars. The total interest alone is about three hundred and ninety thousand dollars. That’s more than the loan itself.

This isn’t a flaw in the system. This is how amortization works. But most buyers never see it because they’re focused on whether they can handle eighteen hundred dollars a month. The total cost is invisible to them.

The True Cost of Homeownership

And the mortgage payment is only part of the picture. Homeownership comes with a set of ongoing costs that renters simply don’t have.

Let’s start with property taxes. This is one of the most overlooked costs in homeownership. Unlike a mortgage, which you eventually pay off, property taxes never end. You pay them for as long as you own the home. And they tend to go up over time. The national average effective property tax rate is roughly one percent of the home’s assessed value, but it varies enormously by state and locality. In some areas, property taxes can easily reach two to three percent per year.

On a three hundred and fifty thousand dollar home at a one percent tax rate, that’s 3500 dollars a year, or roughly 292 dollars a month. Over thirty years, that’s 105,000 and that’s assuming the rate and the assessed value stay flat, which they typically don’t. And here’s the critical point: property taxes continue after you pay off the mortgage. That “free and clear” home still costs you thousands of dollars every year simply to own. And if you can’t pay the taxes, you can lose the home regardless of whether the mortgage is paid off.

Next, you’ve got homeowner’s insurance, which can run fifteen hundred to three thousand dollars a year. You’ve got maintenance and repairs, typically estimated at one to two percent of the home’s value each year, so thirty-five hundred to seven thousand dollars. You might have HOA fees on top of that, which can be another couple hundred to five hundred dollars a month.

When you stack all of this up—mortgage interest, property taxes, insurance, maintenance, potential HOA fees—the total non-equity costs of owning a three hundred and fifty thousand dollar home over thirty years can be anywhere from seven hundred seventy thousand to over a million dollars. These are costs that build no equity. They’re the price of ownership itself. A renter doesn’t pay any of them directly. This doesn’t mean renting is always better. But it does bring up a means for comparison.

Buying vs. Renting — the Real Comparison

You’ve probably heard someone say, “Renting is just throwing money away.” It’s one of the most repeated phrases in personal finance. And it’s one of the most misleading. One of the things that really bothers me about homeownership is this idea that people have purported that the American Dream is to own a house, that renting is throwing money away but buying means you’re investing, you’re growing equity. I think that’s fundamentally flawed logic because of the concept of opportunity cost.

If you were to take the money involved in a down payment and the mortgage payments on a house and instead invested it in the stock market, in pretty much every historical period, you would have made multiples of your money in the stock market versus a house. Now if the options are not saving at all versus buying a house, you should buy the house. But if the options are broader—like investing in the market—then I really think there’s a debate that has to happen. And I say that as someone who has bought a house. So let me walk you through the actual math.

Let’s meet Reilly and Astrid. They’re both thirty years old, they earn similar incomes, about ninety-five thousand a year, and they both have seventy thousand dollars in savings. They make very different choices.

Reilly buys that three hundred and fifty thousand dollar home. Twenty percent down, thirty-year mortgage at seven percent. His total monthly housing cost, including the mortgage, property taxes, insurance, and maintenance, comes to about twenty-eight hundred dollars.

Astrid rents a comparable home for eighteen hundred dollars a month. But here’s what Astrid does differently: she takes that seventy thousand dollars she would have used as a down payment and invests it in a low-cost index fund. And every month, she takes the difference between what Reilly pays—about a thousand dollars—and invests that too. Same index fund, earning an average of eight percent a year.

Now let’s fast forward thirty years. Reilly has paid roughly one million eight thousand dollars in total housing costs. His home, assuming three percent annual appreciation, is now worth approximately eight hundred and forty-nine thousand dollars. He owns it outright. That’s real wealth.

Astrid has paid about six hundred and forty-eight thousand in rent over thirty years. But her investment portfolio has grown to approximately one million six hundred and eighty thousand dollars.

So Reilly’s net financial position from housing is roughly eight hundred and forty-nine thousand dollars in home equity. Astrid’s is roughly one million six hundred and eighty thousand dollars in liquid investments. Astrid has nearly double Reilly’s wealth, and her money is completely liquid. She can access it anytime. She’s not exposed to a local housing downturn or a property tax increase.

Now, I want to be clear. This is not meant to say renting is always better. Reilly has a tangible asset. He has stability. He can’t be asked to leave by a landlord. There’s real lifestyle value in ownership that doesn’t show up on a spreadsheet. But the math is far more nuanced than “renting is throwing money away.”

The Incentives Around you

One of my foundational core principles is understanding the motivations of the folks on the other side of the transaction—or even the people you’re working with. And I’ll tell you, home ownership is just rife with conflict of interest.

Think about it. We’re the only market in the entire world where people are paying five and six percent in transaction costs on a home sale just to pay agents. And here’s the really bizarre part: if you work with a buyer’s agent, the more you spend, the more they get paid. If you’re selling a house, I understand why you’d want your agent incentivized to sell at a higher price. But if you’re buying the house? It should be the opposite. The better deal they get you, the more they should earn. But that’s not how it works.

Now the world is starting to change. There is a movement toward buyer’s agents working on a fixed fee or an hourly basis. But it still hasn’t fully taken hold. And why is that? Because the agents themselves don’t want to lose that revenue stream.

It’s the same problem you see in other industries. Think about interior designers. How does it make sense that an interior designer gets paid as a percentage of the money you spend? If a sofa costs five hundred dollars they get paid a certain amount. If it costs five thousand dollars they get paid ten times that, but it takes them the same amount of time to source the sofa. The incentive structures just don’t make sense for the consumer.

On a three hundred and fifty thousand dollar home, a buyer’s agent and a seller’s agent each typically earn two and a half to three percent of the sale price. That’s roughly ten thousand to ten thousand five hundred per agent. Their incentive is to close the deal and to close it at the highest price possible. An agent who tells you to keep renting earns nothing. An agent who tells you a home is overpriced earns a smaller commission. This doesn’t mean agents are dishonest. It means their incentives are not perfectly aligned with yours.

Mortgage lenders earn money on the interest you pay over the life of the loan. A thirty-year mortgage generates far more revenue than a fifteen-year mortgage. A larger loan generates more interest than a smaller one. The lender’s incentive is to lend you as much as you qualify for, over as long a term as possible.

Title companies, appraisers, inspectors, mortgage brokers, insurance agents—they all earn fees on the transaction. There is no one in the process whose job it is to say, “Maybe you should wait,” or “Maybe you should rent.” That voice has to be yours.

The Tax Break Myth

One of the most persistent arguments for homeownership is the idea that you get a big tax break from owning a home. You’ve probably heard someone say it: “At least with a mortgage, you can write off the interest.” For decades, that was a meaningful benefit. But for the vast majority of homeowners today, this is largely a myth. And I want to explain why.

To deduct mortgage interest, you have to itemize your deductions. And to benefit from itemizing, your total itemized deductions have to exceed the standard deduction. In 2017, the Tax Cuts and Jobs Act nearly doubled the standard deduction. For 2025, the standard deduction is roughly fifteen thousand dollars for a single filer and thirty thousand for a married couple filing jointly. Those numbers are high. And the same law capped the deduction for state and local taxes—the SALT deduction—at ten thousand dollars combined for property taxes and state income taxes.

That combination changed everything. Let me walk you through what it looks like in practice. Take a married couple filing jointly. They buy a three hundred and fifty thousand dollar home with a two hundred and eighty thousand dollar mortgage at seven percent. In the first year, they pay roughly nineteen thousand five hundred dollars in mortgage interest. That sounds like a huge deduction. But when you add their property taxes of about fifty-two hundred and state income taxes of about five thousand, their state and local taxes total about ten thousand two hundred fifty. But the SALT cap limits that to ten thousand. So their total itemized deductions come to about twenty-nine thousand five hundred dollars. The standard deduction for married filing jointly is about thirty thousand.

Their itemized deductions are actually less than the standard deduction. They get zero incremental tax benefit from owning the home. A renter who paid none of those costs gets the exact same standard deduction. Think about that. They paid roughly twenty-five thousand dollars in mortgage interest and property taxes, and their tax benefit from homeownership is zero.

And it gets worse in high-tax states. If you’re in New Jersey, New York, California, Illinois, you might be paying twelve thousand in property taxes and ten thousand in state income taxes. That’s twenty-two thousand in state and local taxes, but you can only deduct ten thousand of it. The other twelve thousand is just lost—a cost with no tax benefit at all. Before the 2017 law, that entire twenty-two thousand would have been deductible. The SALT cap fundamentally changed the math. And yet people still repeat the old logic.

Don’t Rush — and How to Actually Get a Good Deal

One of the things that blows my mind is people who are moving to a new city and they do a tour, meet a real estate agent, do a three-day whirlwind of house visits, find something they like, and buy it. This counters everything I believe in. This is one of the biggest financial decisions you’ll make in your life—maybe the biggest other than where you go to college. There is no possible way that the most important financial decision of your life can be made on a three-day tour. I know people who will spend more than three days picking out their outfits for New Year’s. You certainly shouldn’t be buying a house in that timeframe.

So what should you do? Rent first. Figure out what the area is actually like. Where is the traffic really bad? What are the school districts? Where are the cutoffs between the good districts and the less good ones? What are all the nuances you don’t know yet? I’ve done this in every place I’ve lived, and every single time I’ve realized there’s a bunch of stuff I’m glad I figured out over time, because I really wouldn’t have wanted to live on that block or in that area.

The second element is there’s no way you’re going to find the best deal possible on a whirlwind tour. If you want to get a good deal on your biggest financial investment, you have to put in the work. Some things my wife and I have done over time: when it’s a tough market, we’ve literally written a hundred and fifty letters, found addresses of places we’d be interested in, and mailed them to the homeowners saying we’d be interested in buying. We’ve sent the owners nice notes, fruit baskets. These are things that actually make a difference.

We’ve also specifically chosen in some cases not to work with a buyer’s agent, because that person is going to add virtually no value in most cases. And here’s why that’s a smart move: if a seller’s agent realizes you’re not working with a buyer’s agent, that entire commission pool could go to them. So they’ll be more incentivized to push your offer over everybody else’s—it’s like selling two houses in one. They’re doubling their commission base.

We’ve also found that when it’s truthful—and it was truthful—letting the sellers know a little bit about you as a family can help. Selling a house they may have lived in for decades is emotional, and knowing that it’s going to a family that’s not going to tear it down and build a mansion actually has tangible value to people.

When Buying Makes Sense — and When It Doesn’t

Now I want to be very clear. This module is not anti-homeownership. Buying a home can be an excellent decision under the right circumstances. But I want to give you a framework for thinking about it clearly.

Buying tends to make sense when you plan to stay in the home for at least seven to ten years, long enough to offset transaction costs and build meaningful equity. It makes sense when the total monthly cost of owning—mortgage, taxes, insurance, maintenance—is not dramatically higher than renting a comparable home. It makes sense when you have a stable income and a funded emergency reserve beyond your down payment. And critically, it makes sense when you’re buying based on the price of the home, not the monthly payment the lender structures for you.

Renting tends to make sense when you may move within three to five years, because transaction costs eat into any equity you build. It makes sense when the cost of owning is significantly higher than renting in your market—some cities have extreme price-to-rent ratios. It makes sense when you would need to stretch financially to buy, leaving no margin for emergencies or repairs. And it makes sense when you can invest the difference and have the discipline to actually do it.

Neither choice is inherently right or wrong. The key is making the decision with full information rather than cultural pressure or a monthly payment that a lender calculated for you.

Key Takeaways

So let’s summarize with a few key takeaways.

Number one: focus on the purchase price of the home first. Ask whether the asset is worth what you’re paying, independent of interest rates or monthly payments. Just like with a car—price first, financing second.

Number two: calculate the full monthly cost of ownership. That’s not just the mortgage. It’s the mortgage plus property taxes plus insurance plus maintenance plus any HOA fees. The mortgage payment alone is misleading.

Number three: research property tax rates in your specific area before committing. They vary enormously, they never go away, and they tend to go up. This is one of the biggest hidden costs of homeownership.

Number four: compare the true cost of buying versus renting in your market. Use a buy-versus-rent calculator with realistic assumptions. Don’t just assume buying is automatically the smarter move.

Number five: don’t rush. If you’re moving to a new area, rent first. Learn the neighborhood. Learn the school districts. Learn where the traffic is. Give yourself time to make this decision right.

Number six: put in the work to get a good deal. Write letters to homeowners. Consider whether you really need a buyer’s agent. Make your offer personal. The best deals don’t come from a three-day tour.

And just as important, what not to do. Don’t assume renting is throwing money away. A huge portion of your mortgage payment, especially in the early years, is also money that builds no equity. Don’t buy a home simply because a lender approved you for a certain amount. Lenders approve you for the maximum they think you can repay, not the amount that’s financially healthy for you. Don’t ignore property taxes. Don’t let interest rate movements drive your purchase decision. And don’t forget opportunity cost—every dollar locked in a down payment and home equity is a dollar not invested elsewhere.

The Bottom Line

Buying a home is not automatically a good investment. Renting is not automatically a waste of money. The truth depends on your specific situation: where you live, how long you plan to stay, what the price-to-rent ratio looks like, and what you would do with the capital if you didn’t buy.

The same principles that guided us through the car-buying module apply here with even more force. Focus on price, not payment. Understand who profits from your decision. Think about total cost, not monthly cost. And don’t let emotion override arithmetic.

Homeownership can be wonderful. It can also be a financial burden that limits your flexibility for decades. The difference usually comes down to whether the decision was made with a spreadsheet or a feeling.

A home is both a place to live and a financial commitment. Treat it as both. The system is built to sell you a home. Nobody in the transaction gets paid to tell you to wait. So run the numbers. Then make the decision.