Rent or Buy: The Honest Version of the Math

Two Slogans, Both Wrong

I've heard both slogans so many times that I stopped trusting either of them. Renting is a waste of money landlords say because renting buys nothing while a mortgage builds equity. Homes are a terrible investment renters say pointing instead to stock market returns. Both arguments fail in the same way: They compare wrong numbers. Paying a mortgage isn't a cost like rent is because part of it is director money that moves from your checking account to the equity in your own home which is saving not spending. Renting is not pure waste either because it buys the same service that a house provides a roof over your head without tying up your capital. The only honest comparison is sunk costs the money that burns every road and that you never see again. Everything else is accounting noise

What Owning Actually Burns

The rent is simple. The full payment is irrecoverable every month without exceptions. On the other hand owning burns four things. mortgage interest the price of the loan which at 6.5 percent is the overwhelming majority of the payment for the first decade as our mortgage math article works out line by line. property taxes about 1 percent of home value per year as a national average highest in Texas and New Jersey lowest in the South and West. Maintenance which the general rules of the industry also place close to 1 percent of the annual value inflated in practice a roof one decade a furnace the next. And the one that almost everyone forgets opportunity cost the return your down payment would have earned if it had remained invested and the T-bills alone would pay about 5 percent in 2026. Against those four landlords collect a trade-off that renters never get: The house itself tends to appreciate historically about 3.5 percent a year in nominal terms over long periods. Add up the five numbers and you get the true cost of ownership

The Worked Example at 2026 Rates

Take a $500,000 home with a 20 percent down payment a $400,000 loan at 6.5 percent with a standard 30-year fixed term about the national average rate this month. Here's the first year in round numbers

That monthly payment of about 2,530 is not an assumption. The standard payment factor for a 30-year loan at 6.5 percent is about $6.32 payment per $1,000 borrowed and 400 times 6.32 is about 2,528 per month which is where the number above comes from. So the honest question is not whether the rent is more than the total mortgage payment plus taxes and maintenance. It's a question of whetherYou can rent an equivalent home for less than about $1,950 a month the net sunk cost shown in the table. In much of the Midwest and South where a $500,000 home could rent for $2,600 owning a home earns comfortably. In expensive coastal markets the arithmetic changes: A $1,000,000 condo carries about $3,900 a month in net sunk cost.and it often rents for 3,500 so the tenant wins and can invest the difference each month. The relationship between prices and rents in your zip code decides the answer not a slogan

The Costs Nobody Budgets

Transaction costs are the silent killer of short ownership. Historically selling a home has cost 5 to 6 percent in agent commissions and buying one adds another 2 to 4 percent in closing costs title insurance and fees. Call the round trip 8 to 10 percent of the home price which on a $500,000 home equals between $40,000 and$50,000 several years of any ownership advantage gone in a single move. That's why nearly all serious analysis converges on the same rough threshold: If you're not sure you'll stay five years or so the math leans heavily toward renting no matter what the monthly comparison looks like. Add to that the surprises a $15,000 ceiling a condo special assessment and short-term homeownership is best understood as a transaction.leveraged with very high fees

The Breakeven Horizon: How Long You Actually Have to Stay

I find the break-even year to be more useful than any of the monthly numbers alone so here's how I do it. Going back to the Midwest comparison above the $500,000 house rents for about $2,600 a month versus a net sunk cost of ownership of $1,950 a month. Owning a home is $650 a month cheaper or $7,800 a year before you factor in theThe cost of the move itself. But buying also means paying 8 to 10 percent round-trip $40,000 to $50,000 for this house. Divide the transaction cost by the annual upside and you get the figure that really matters. 40,000 divided by 7,800 is about 5.1 years. 50,000 divided by 7,800 is about 6.4 years. IfIf you don't make it to that window the transaction costs will wipe out the entire advantage of owning. If you make it past that each additional year will have money in your pocket that renting couldn't have matched

Run the same test at the coastal condo and the arithmetic will behave completely differently. There owning costs 3,900 a month versus renting for 3,500 so owning already costs 400 a month more before you've paid a single dollar in closing costs. There's no horizon that will fix that. Extending the holding period just racks up more months of extra payment to own plus transaction costs that start around$80,000 on a $1,000,000 property. Stay ten years in that condo and you'll have absorbed $48,000 in accumulated monthly disadvantage plus $80,000 to $100,000 in round-trip travel costs a total drag of about $128,000 to $148,000 relative to renting the same unit and investing the difference. WhenPeople cite the five-year rule this is the derivation behind it. Owning only becomes a break-even proposition when owning is already cheaper than renting monthly. If not no amount of patience will save the business

Leverage Cuts Both Ways

The strongest real argument for buying is leverage. Twenty percent down is five-to-one leverage so a 3.5 percent home appreciation turns into an annual return of about 17.5 percent on the down payment before costs which is how ordinary homes built extraordinary wealth for the middle class during the postwar decades. But leverage has no say in direction. A 10 percent price droppercent wipes out half the equity and 2008 showed on a national scale that housing can fall with prices falling about 27 percent from their peak to their trough nationally and much more in the bubbliest metropolitan areas. Leverage is also why the forced savings argument deserves respect. An amortizing mortgage drags money into the equity each month whether the landlord is disciplined or not and behavioral evidence says that most renters actually don't.They invest the difference they save. The spreadsheet assumes a discipline that the average person does not have

Case Study: When a Data-Driven Company Got the Carrying Cost Wrong

Zillow spent years building one of the largest home price databases in the country and then decided to use it to buy homes directly. Zillow Offers launched in 2018 made instant cash offers on homes using an automated valuation model planned light repairs and aimed to resell each home within a few months for a small margin on a high volume of transactions. The entire model depended on correctly pricing the same categories this article discusses for a typical buyer the cost of money invested in eachhouse the taxes insurance and maintenance of the inventory that Zillow now owned and the risk that the value of a home would change before the resale was closed

In 2021 home prices were changing faster than usual and renovation contractors were in short supply across the country. Zillow's algorithm continued buying at prices that assumed a normal resale schedule but homes remained in inventory longer while the company waited for contractors racking up exactly the maintenance interest taxes insurance and maintenance costs which this article treats as unrecoverable for an average homeowner. In November 2021 the company announced thatwould close the entire iBuying business took hundreds of millions of dollars in write-downs on the homes it still owned and said it would cut about a quarter of its overall staff as it shuttered the unit

What I gather from Zillow's experience is not that their engineers were sloppy but rather that they had more data on homes than almost anyone alive. It's that the sunk cost side of a home the maintenance costs that accumulate while the asset sits there doing nothing is really difficult to forecast even with a full-time team and a proprietary model and it gets harder exactly when the market moves faster. An individual buyer who has owned a home for years is running a smaller slower version of thesame bet Zillow made thousands of times in just a few months

Where This Breaks

All of the above assumes a fairly typical market and a fairly typical filer and many real-world situations violate that on purpose or by accident. The first break is the price/rent ratio itself. In some Midwest and Rust Belt metropolitan areas the rent for an equivalent home is so much higher than the cost of ownership that the purchase pays off its transaction costs in a year or two and the five-year rule barely applies because the monthly gap is huge. In more expensive coastal metropolitan areas the opposite may be so true thatAs the condo example above shows there is no horizon where buying wins. The national figures in this article are an average of markets that don't really look like each other

The second break is the tax treatment. I left taxes out of each number above on purpose because the effect varies so much by income and state that a single national figure would be more misleading than helpful. Mortgage interest and property taxes are deductible if itemized and since 2017 the state and local tax deduction has been capped at $10,000 while the standard deduction has roughly doubled so most taxpayers no longer itemize at all. For SomeoneWhich details a person with a high income and a large mortgage in a high-tax state the after-tax cost of ownership is significantly lower than the pre-tax figures suggest

The third break is the time you don't control. The entire framework assumes that you can choose your holding period decide today that you will stay for five years and stick to it. A divorce a layoff a sick parent or a job offer in another city can force a sale within that window and the years between 2009 and 2011 taught a generation of homeowners that a forced sale in a down market crystallizes the price drop;The leverage section above only tests hypothetically. If there is a real chance that something will force you to act soon assess that risk before you buy not after

What the Spreadsheet Cannot Price

The math also ignores everything that makes the decision personal. Ownership buys stability no landlord can refuse to renew the lease a fixed principal and interest payment that inflation silently reduces in real terms each year and the freedom to renew without asking permission. Renting buys optionality the ability to look for a better job in another city with sixty days' notice trying out a neighborhood before committing to it keeping savings liquid. For a student or young analyst whose income employer and city can change three times in onedecade that optionality is genuinely valuable and the five-year rule is almost never clarified. The honest framework is that renting is not throwing away money it is paying for flexibility and buying is not automatically an investment it is buying stability with leverage

How I Actually Run This Math

I'm currently a renter in an apartment near campus with a month-to-month lease and I'm not going to tell anyone that that's the objectively right choice it's just the right choice for such a short horizon. When a friend asks me if he should buy this is the order I actually follow and it's closer to the call above than anything a real estate agent will tell you

First I ask them how many years ago they are really confident not hopeful confident. Below five I don't even bother to calculate the monthly figures because the previous section on transaction costs shows that short horizons are dominated by the 8 to 10 percent round-trip almost regardless of how favorable the monthly comparison appears. In the last five years I run the quick legend screen multiply the house price by 5 percent divide it by twelve and compare it to the priceactual rent for the same place on a local listing site not a national average. Only after that do I look at the down payment amount because a larger down payment reduces the loan and interest burn but increases the opportunity cost of the cash sitting in the house and people routinely notice the first effect and overlook the second

My honest read is that most of the emotional weight in this debate is doing the job that arithmetic should do. Owning doesn't become a good investment just because a mortgage payment seems more responsible than a rent check and renting doesn't become a waste just because you never see the money again nor do you ever see the mortgage interest again. The only thing I'm really not sure how to model well is how much to weight the flexibility option for someone my age. A spreadsheet can't tell you.how much it costs to accept a job across the country with six weeks' notice and I'd rather admit it than expect a number to reflect it

The Bottom Line

Compare the sunk costs not payments interest taxes maintenance the transaction cost of buying and selling and the yield your down payment offers with the full rent check on the other side. At 2026 interest rates a typical home burns about 5 percent of its value a year net of expected appreciation so the monthly barrier the rent must overcome is the price of the home multiplied by 5 percent divided by twelve not the monthly rent payment.mortgage. Whether owning profits from there is first a matter of geography and Zillow's own experience shows that even a company that stares at national pricing data can misjudge those sunk costs when the market moves quickly. Even when the property wins in the monthly numbers it still has to make up for the back-and-forth transaction cost which is why the honest answer to renting or buying is almost never yes or no it's several years five to six in a typical favorable market. My own shorthandIt's simple: find the break-even year and then decide honestly how long you'll actually stay because that answer was to do all the work the mottos pretended you didn't need