Rent or Buy: The Break-Even Math Calculators Miss

You plug your numbers into a rent versus buy calculator. Mortgage payment here, rent there, and the tool tells you buying wins in year four. You screenshot it, send it to your partner, and start looking at listings.

The calculator is not lying. It is just leaving out the three costs that decide the answer. The rent or buy break-even is usually two to three years later than the free tools suggest, and the gap comes from money that never appears on a mortgage statement.

Here is the full arithmetic, run on a real median-priced house, with the parts most calculators quietly skip.

Key Takeaways

• Renting is currently cheaper in 27 of the 50 largest US metros, buying in 23, so the national answer is genuinely a coin flip
• Round-trip transaction costs run near 10% of the purchase price, which alone takes about three years of normal appreciation to recover
• Most calculators ignore the opportunity cost of your down payment, worth roughly $417 a month on a median purchase
• Only the principal portion of your payment is savings, and in year one that is about 14% of what you send the bank

Why the rent or buy answer stopped being obvious

For two decades the advice was simple, because the maths was simple. Rates were low and prices climbed, so almost any purchase looked good given enough time.

That has changed on both sides. Mortgage rates now sit in the low-to-mid 6% range. That is better than the near-8% peak, and still more than double the sub-3% loans that defined the pandemic years. Meanwhile the median existing-home price sits around $396,800.

The result is a genuine split. Empower's analysis of the 50 largest metros found buying cheaper in 23 of them and renting cheaper in 27. Roughly half the country gets one answer and half gets the other, which is why national advice is close to useless here.

It is also why 47% of Americans in one survey said they simply cannot afford to buy right now. That is not pessimism. For a lot of households it is arithmetic.

The real monthly cost of owning

Take the median house at $396,800 and a 15% down payment, which is close to what buyers actually put down. That is $59,520 down and a $337,280 loan.

At 6.5% over 30 years, principal and interest comes to about $2,132 a month. That is the number most people compare against rent, and it is the number that causes the mistake.

Now add what the bank does not bill you for:

• Property tax at roughly 1.1% of value: $4,365 a year, or $364 a month
• Homeowner insurance: around $150 a month, and rising fast in weather-exposed states
• Maintenance at the standard 1% of value rule: $3,968 a year, or $331 a month

Running total: $2,977 a month. You are 40% above the payment the calculator showed you, and you have not moved in yet.

If you want to test how the loan portion changes with a different rate or deposit, our loan EMI calculator will run the payment side in a few seconds. The three costs above are the ones you have to add yourself.

The cost nobody puts in the calculator

Your down payment is not spent. It is moved. And while it sits in the house, it is not doing anything else.

You put in $59,520 plus roughly $11,904 of closing costs at 3%. Call it $71,424 of capital locked into the property. Invested in a broad market fund at a conservative 7%, that same money would generate about $5,000 a year, or $417 a month.

That is a real cost of owning and almost no free calculator includes it. Add it and your true monthly figure is $3,394.

There is an offset, and it is smaller than people expect. Part of each payment buys equity. In year one, interest eats roughly $21,923 of your $25,584 in payments, leaving about $3,661 of principal. That is $305 a month of actual saving, around 14% of what you send the lender. It improves every year, slowly.

Net it out and owning costs about $3,089 a month in year one. That is your honest comparison number against rent, before any appreciation.

The transaction cost that sets the real break-even

Here is the piece that decides whether the whole thing works: getting out.

Buying costs about 3% in closing fees. Selling costs closer to 7% once you count agent commission, transfer taxes and the repairs a buyer negotiates. Round-trip friction is near 10% of the purchase price, about $39,680 on this house.

Appreciation has to cover that before you are even. At a normal 3% a year, the house gains roughly $11,904 annually. Divide the friction by the gain and you get about 3.3 years just to break even on transaction costs alone. Not to profit. To get back to zero.

That is why the standard guidance says five years, and why it holds up. If there is any real chance you move for a job, a relationship or a school district inside three years, the maths does not just get worse. It flips.

Anyone weighing a purchase against today's borrowing costs should also read what higher mortgage rates cost you, and if the mechanics of rate pricing are new to you, our interest rate entry covers the basics.

How to actually run your own number

Forget the national picture. Four figures decide your answer.

One: how long will you really stay? Not how long you intend to. Look at how long you stayed in the last three places you lived. Under four years and renting is probably correct regardless of price.

Two: what does the equivalent rental cost? Compare the house you would buy against the house you would rent, not against your current flat. People shop up when they buy and then compare to what they had.

Three: what is the local price-to-rent ratio? Divide the purchase price by the annual rent on a comparable home. Under 15 favours buying. Over 21 favours renting strongly. Between them, the answer is your time horizon.

Four: what happens to the down payment if you do not buy? If it goes into an index fund, include the 7%. If it sits in a current account earning nothing, the opportunity cost argument mostly disappears and buying looks better.

That last one is more common than personal finance writing admits, and it is a legitimate reason buying wins for people who would not otherwise invest.

Frequently Asked Questions

Is it cheaper to rent or buy right now?

It depends entirely on your metro. Analysis of the 50 largest US metros found renting cheaper in 27 and buying cheaper in 23, so there is no national answer. Run your local price-to-rent ratio instead.

How long do you need to own a home to break even?

Roughly three and a half years to cover transaction costs alone, at normal appreciation. Buying and selling together cost close to 10% of the price, and a 3% annual gain takes about that long to recover it. Five years is the safer planning figure.

What costs do rent versus buy calculators leave out?

Usually three: maintenance at a realistic 1% of home value per year, the full 7% cost of selling, and the opportunity cost of your down payment. Together they can shift the break-even by two to three years.

How much of my mortgage payment actually builds equity?

In year one, about 14%. On a $337,280 loan at 6.5%, interest takes roughly $21,923 of your $25,584 in annual payments, leaving about $3,661 of principal. The share rises each year but stays small for the first decade.

What is a good price-to-rent ratio?

Divide purchase price by annual rent for a comparable home. Below 15 generally favours buying, above 21 favours renting, and anything between is decided by how long you plan to stay.

The short version

Buying is not a better financial decision than renting. It is a different one, with a much higher cost of changing your mind.

The mortgage payment is the smallest part of the comparison. Tax, insurance, maintenance and the return your down payment is no longer earning add roughly 45% on top, and a 10% round-trip transaction cost means the clock starts more than three years behind.

Run those four figures on your own city before you run any listing site. If the answer is still buy, you will buy with your eyes open. If it is rent, you just saved yourself about $40,000 in friction.

Disclaimer: This article is for informational purposes only and does not constitute financial advice. Always consult with a qualified financial advisor before making investment decisions. Past performance is not indicative of future results.