Buying a House vs Renting an Apartment: The Honest Math

The apartment is cheaper because it is smaller. Compare a similar house first, then price the saving: at $1,600 rent, renting wins by about $159,000 over ten years.

Written by Jonathan Nyst Updated September 2026 5 min read The math Every figure re-runnable

Buying a house and renting an apartment are two decisions wearing one coat: whether to own or rent, and how much home to live in. Most comparisons blur them, which is why they mislead in both directions. Done honestly, in two steps: first compare the house with the rent for a similar house — on our model’s default scenario ($420,000 home, $2,100 comparable rent, 20% down at 6.5%, ten years), renting and investing the difference wins by about $67,000. Then price what the apartment actually saves. If the apartment you would really rent costs $1,600 a month, renting it wins by about $159,000 over the same ten years, because you are pocketing roughly $1,450 a month against the full cost of owning, and investing it. The house is not a bad purchase in that comparison. It is a bigger purchase, and the math shows what the extra space costs.

Is it better to buy a house or rent an apartment? Two different questions

The first question is financial and has a computable answer: does owning beat renting the same kind of home? Our model answers it by running one person down both paths — buy, or rent an equivalent place and invest what buying would have cost — and comparing net worth at the end, with selling costs, taxes and both sides’ invested surpluses counted. The second question is about how much home you want, and no calculator answers it for you; it can only tell you the price of the difference.

Mixing them up produces the two classic errors. Comparing a three-bedroom house against a one-bedroom apartment “proves” renting is dramatically cheaper — of course it is, you are comparing more home with less. Comparing the mortgage payment alone against the apartment rent “proves” they cost about the same — $2,124 a month in principal and interest against, say, $2,100 rent — and hides the $943 a month of tax, insurance and maintenance that brings the full cost of owning the default home to $3,067. Separate the questions and both errors disappear.

What does the like-for-like comparison say?

At today’s rates, renting wins in the typical case, and the margin is not small. On the default scenario the renter finishes about $67,000 ahead over ten years, and the reason is visible in month one: owning the $420,000 home costs $3,067 a month all in, renting a comparable one costs about $2,115 with renter’s insurance, and the renter also keeps the $96,600 that never went into a down payment and closing costs. Both surpluses compound at the model’s 7% return, and ten years of that outweighs the equity the owner builds at a 6.5% mortgage. In the most expensive metros the same gap is far wider: the Bay Area page runs the typical San Francisco home value and rent through the same engine, with the city’s transfer tax included.

Buying wins the like-for-like contest only when a comparable rental costs more than about $2,468 a month — the tipping-point rent — or when the mortgage rate is near 5% or lower. Is it better to rent or buy a house walks through the three numbers that decide it; this guide takes the next step.

How much does a cheaper apartment change the answer?

By a lot, and in the renter’s favor — every $100 a month of rent you do not pay is roughly $18,000 more for the renter after ten years of investing it. The table runs the default $420,000 house against a range of rents at 6.5%, ten years, 20% down. Read the first rows as “the apartment I would actually rent” and the last rows as “a rental as nice as the house”:

The middle column is the owner’s full monthly cost of $3,067 minus the rent and $15 of renter’s insurance, in year one; the model grows the rent 2.5% a year and the owner’s tax and insurance with inflation, so the gap narrows a little each year. The last column is what the whole comparison comes to — house sold at the end, 6% selling costs paid, portfolios taxed — and it is the number to hold in mind when a smaller place is the one you would genuinely live in.

What does the house give you that the apartment doesn’t?

Things the table cannot price, and they are real: space, a yard, control over the walls and the lease term, protection from a landlord’s decision to sell or renovate, and the fixed mortgage payment that turns housing into the one bill that does not follow inflation. The model does credit the financial side of all that — the owner’s equity, the appreciation on the whole house, the fact that principal payments are savings — which is why the gap at the comparable rent is $67,000 rather than the hundreds of thousands a naive “rent is thrown away” argument gets wrong in the other direction. Is renting throwing money away shows what each side actually burns.

What the model deliberately does not do is put a dollar value on the yard. That is your call, and the table gives you the price tag: choosing the house over a $1,600 apartment costs about $159,000 of net worth over ten years at today’s rates, or about $1,450 a month of cash. Some people will pay that gladly. The point is to pay it knowingly.

When does buying the house win anyway?

When the rent for a comparable home is above the tipping rent, when your rate is well below 6.5%, or when you stay long enough. At $2,800 rent buying pulls ahead in year 5 and wins by about $61,000 over ten years; at $3,200 the crossover comes in year 3 and the ten-year margin is about $134,000. Cheap markets get there sooner: the metro table shows where typical rents already sit above the typical home’s tipping rent. And rates move the threshold itself — the ladder in rent vs. buy in 2026 has it at every rung from 4% to 8%. A rental that is nicer than the house you would buy flips the comparison the other way too; the arithmetic is symmetric.

Run your own numbers

Run the like-for-like case first, then the $1,600 apartment, then swap in your own house price, both rents and your quoted rate. The difference between the two results is what the extra space costs you; the sign of the first result tells you whether owning the house beats renting one like it at all. Every figure here is computed by the open-source engine documented on the methodology page and guarded by automated tests.

Jonathan Nyst

Jonathan Nyst built RentVsBuyMath as an independent project — for himself first. He spent fifteen years marketing financial products, in banking, fintech and payments at CMO level, which is exactly how he knows what a lead-generation calculator looks like from the inside. This is the calculator without the funnel: he is not a lender, broker or agent, the site takes no referral fees, and nobody is paid more if you decide to buy. The whole model is public — every formula documented on the methodology page, the engine MIT-licensed, covered by automated tests including scenarios computed by hand to check it.

Drafted with AI from the engine's output; reviewed and published by Jonathan Nyst. How this site is made · Corrections