Renting vs Buying: The Numbers People Leave Out of the Comparison

Ask a rent-versus-buy calculator what to do and it will usually start by putting your rent next to an estimated mortgage payment. If the payment is close to the rent, buying looks obvious. Equity, after all, beats a landlord.

That comparison has two problems. It counts money you are not spending, and it leaves out money you are. Fixing both changes the answer, and at today’s mortgage rates it changes it in the same direction almost everywhere.

The comparison almost everyone runs

A mortgage payment is two different things wearing one number. Part of it is interest, which is the price of borrowing and is gone the moment you pay it. The rest is principal, which does not leave your balance sheet at all: it moves out of your checking account and into your own equity, reducing what you owe by exactly as much.

The Bureau of Labor Statistics already draws this line. In the Consumer Expenditure Survey, the total for owned dwellings is made of three things: mortgage interest and charges, property taxes, and maintenance, repairs, insurance and other expenses. For homeowners with a mortgage in 2024 those were $9,725, $4,689 and $4,704, and they add to the $19,118 owned-dwellings total exactly.^[1] Principal is not in the list, because paying down a loan is not consumption.

Put the two comparisons side by side on the same house and they disagree by hundreds of dollars a month.

The costs you never get back

The useful frame is unrecoverable costs: money that leaves and does not come back, on either side of the decision. A renter has one of them, and it is the whole rent. An owner has five.

• Mortgage interest. The largest one for at least the first decade, because early payments are almost all interest.
• Property tax. Rising faster than the rest: taxes climbed 31% between 2019 and 2025.^[10]
• Insurance. Average monthly premiums jumped 72% over the same period.^[10]
• Maintenance and repairs. The roof, the water heater, the tree that comes down in a storm.
• The return your down payment is not earning. Money in a house is money not in a Treasury bill. A three-month bill yielded 4.28% on September 28, 2026.^[5]

The survey data gives a sense of scale. Homeowners with a mortgage averaged $19,118 a year on those first four, or $1,593 a month. Renters averaged $15,893 a year on rented dwellings, $1,324 a month.^[1] Those are different households living in different buildings, though: the mortgage-holding group reported mean income before taxes of $150,918 against $65,555 for renters, so read the two numbers as a rough scale rather than a matched comparison.

What the median home costs in year one

Take the median existing home, which sold for $429,100 in August 2026,^[3] with the 10% down payment that was typical for a first-time buyer last year.^[9] That is a $386,190 loan at the 7.03% average 30-year rate,^[2] which gives a principal-and-interest payment of $2,577 a month.

Of the $30,925 that goes to the lender in year one, $27,025 is interest and $3,900 is principal. The equity story people have in mind, the one where a payment quietly turns into savings, does not really begin for years.

What would renting the same house cost? The Consumer Expenditure Survey asks owners what their home would rent for, and mortgage-holding households put it at $2,549 a month on homes averaging $502,777.^[1] That is 0.51% of value a month, which on a $429,100 house is about $2,175. For reference, the median asking rent for a vacant rental unit nationally was $1,531 in the second quarter of 2026, but most of those units are apartments,^[4] which is why the owner-estimated figure is the fairer like-for-like.

Appreciation decides it

Owning costs about $898 a month more than renting the same house, on these numbers, which is $10,776 a year. Something has to make that back, and the only candidate is the house being worth more later.

So the honest version of the question is not whether buying beats renting. It is how much the house has to appreciate for buying to beat renting, and that number moves the answer around violently. The chart below runs the full comparison year by year: the buyer pays the mortgage, taxes and upkeep and sells at the end, the renter pays rent growing at 3% a year and invests both the down payment and every month of the difference at 4.28%.

Two years of difference in an assumption nobody can verify moves the breakeven by a decade. That is the real finding, and it is why a calculator that hands back a single confident year is telling you less than it appears to. Rent growth matters too, in the other direction: the shelter index rose 3.0% over the twelve months ending August 2026,^[6] and a fixed mortgage payment does not move while rent does.

How long you stay is the other half

Every one of those breakevens exists because buying and selling are expensive. On the way in, the median buyer of a home purchase loan paid $6,684 in total loan costs in 2023, up 12.2% from $5,954 the year before, and that figure covers only the loan-related charges the buyer pays.^[7] On the way out there is the agent compensation, which NAR now states plainly is “not set by law and is fully negotiable,”^[8] plus title, transfer taxes and whatever the inspection turns up.

A round trip in the 5% to 7% range of the sale price is common, and it has to be earned back before anything else counts. Spread over three years that is punishing. Spread over a decade it is a rounding error.

Which is why the length of stay matters more than the interest rate. Sellers in NAR’s 2025 survey had owned their homes for a median of 11 years, an all-time high.^[9] Americans are also moving less than at any point on record, with residential mobility at 11.2% in 2024.^[10] If you are confident about the next decade, the transaction costs stop mattering. If your job, your relationship or your city is an open question, they dominate everything else in the calculation.

The pattern is the same one that applies to any large asset you buy and later sell, where the sticker price is a small part of the story next to what it costs to hold: the arithmetic behind what a car really costs per mile is this calculation with a shorter life and faster depreciation.

The tax break most buyers do not get

The mortgage interest deduction is the standard rebuttal to all of this, and for most buyers at the median it is worth nothing at all. It is an itemized deduction, so it only helps to the extent your itemized total beats the standard deduction, which for 2026 is $32,200 for married couples filing jointly and $16,100 for single filers.^[11]

The couple in the example above has $27,025 of mortgage interest and about $4,002 of property tax in their first year. That is $31,027, and it is $1,173 short of the standard deduction they would get for filing a blank Schedule A. Their deduction is worth zero. A single filer with the identical loan clears $16,100 easily and does get the benefit, as would a couple buying a much more expensive house. The break is real, but it is concentrated at the top of the market, and it shrinks every year as the loan amortizes.

Run it on your own house

Every figure in this article is a national average standing in for something you can measure exactly. Your property tax bill is a number, not 0.93%. Your repairs last year were a number. Your rent is a number. The comparison is only useful once those replace the averages.

If you already own, the pieces are sitting in your transaction history. A mortgage set up as an amortizing loan in LumaLedger posts each payment as a split, so the interest lands in spending while the principal reduces the loan balance, and the Real estate page tracks the home’s value against the mortgage so you can watch equity rather than estimate it.

LumaLedger

Real estate

$106,600 equity · after $211,400 mortgage

Primary homeZestimate

Single-family · 3 bd · 2 ba

Value

$318,000

Mortgage ··3391

$211,400

Equity

$106,600

Equity over time

If you rent, the input you need is your real housing total, rent plus renters insurance plus utilities, which is the same number that decides the price you could actually carry if you did buy. Either way it comes out of the same place your needs, wants and savings already get counted, because housing is the line that decides whether the rest of the budget has any room in it.

Then do the subtraction that the calculators skip. Add up what leaves and does not come back on each side, give the difference an honest appreciation rate, and ask how many years you would have to stay for the answer to hold.