Price-to-rent ratio: how to calculate it and what it tells you

The median existing home in the United States sold for 429,100 dollars in August 2026, according to the National Association of Realtors. The typical asking rent was 1,932 dollars a month in September, according to Zillow's September 2026 market report. Divide the first by twelve times the second and you get a national price-to-rent ratio of about 18.5.

That figure is rough, because the homes that sell and the homes that rent are not the same mix. The ratio is far more useful when you calculate it for one home and one neighborhood. This guide shows how, what the result means, and why the mortgage rate changes how you should read it.

What is the price-to-rent ratio?

It is the number of years of rent it would take to equal the purchase price of a similar home.

Price-to-rent ratio = home price / (monthly rent x 12)

A low ratio means homes are cheap compared with rents, which favors buying. A high ratio means homes are expensive compared with rents, which favors renting.

How do you calculate the price-to-rent ratio?

1. Find the price of a home you would realistically buy.
2. Find the monthly rent for a similar home in the same area: same size, same condition, same kind of street.
3. Multiply the rent by 12 and divide the price by the result.

Step two is where most errors come from. Comparing the price of a three-bedroom house with the rent on a one-bedroom flat produces a high ratio that says nothing about either home. If the exact home is listed both for sale and for rent nearby, use that pair.

What is a good price-to-rent ratio?

The most quoted thresholds come from Trulia's Rent vs. Buy Index, as cited by SmartAsset:

• 1 to 15: buying is more favorable.
• 16 to 20: renting is typically more favorable.
• 21 or more: renting is more favorable.

On those bands, the national figure of about 18.5 sits in the middle group. Treat the bands as a starting point, not a verdict. They are rules of thumb that do not change when mortgage rates do, and rates change the answer a great deal.

Why does the same ratio mean different things at different mortgage rates?

Because the ratio only knows two numbers. It does not know what the loan costs. To show how much that matters, we took one home with a ratio of 16 (a 400,000 dollar home against 2,083 dollars of rent) and ran it through our rent vs buy calculator at different mortgage rates. Everything else stays fixed: 20% down, 3% yearly growth in prices and rent, and 6% investment returns.

The same home with the same ratio goes from a clear case for buying at 4% to a clear case for renting at 7%. A threshold of 15 or 16 was a reasonable dividing line when mortgages were cheap. It is too generous when they are not.

At the 7.40% average that Freddie Mac reported on October 8, 2026, the same model needs a much lower ratio before buying wins within a normal stay:

• Ratio of 15: buying pulls ahead in year 28.
• Ratio of 13: year 9.
• Ratio of 12: year 6.
• Ratio of 10: year 3.

These are illustrations from one simple model with steady growth rates, not forecasts. The point is the direction: the higher the mortgage rate, the lower the ratio has to be.

How does the ratio relate to the 5% rule?

They are the same comparison written two ways. The 5% rule asks whether a year of rent is less than 5% of the price. A year of rent at exactly 5% of the price is a ratio of 20. So "rent if the ratio is above 20" and "rent if the yearly rent is under 5% of the price" say the same thing.

To convert, divide 100 by the ratio. A ratio of 16 means the yearly rent is 6.25% of the price. A ratio of 12.5 means 8%.

What does the price-to-rent ratio leave out?

• The mortgage rate, as shown above.
• How long you stay. Buying and selling costs make short stays expensive whatever the ratio. See how the break-even year works.
• Property tax, maintenance, and insurance, which vary by location and by building.
• Where prices and rents go next. The ratio is a snapshot of today.
• Your down payment and what it could earn elsewhere.

How should you use the ratio?

Use it to compare areas and to decide whether the full calculation is worth doing. If you are choosing between two neighborhoods, the one with the lower ratio gives a buyer more home for each dollar of rent avoided. If a home's ratio is above 20, renting is likely ahead unless you plan to stay a long time. If it is below about 12, buying deserves a serious look even at current rates.

For anything in between, the ratio cannot answer the question. Put the price, the rent, your mortgage rate, and the years you expect to stay into the rent vs buy calculator and read the break-even year. If you already own, the home and its mortgage belong in your net worth either way, and you can track both in Nethaven next to your investments to see how much of your wealth sits in one building.