Affordability is one of the most common reasons people consider moving, yet “affordable” turns out to be a slippery word. A low sticker price doesn’t automatically make a market affordable, and a high one doesn’t always make it out of reach. This guide explains, in plain terms, how housing affordability is actually measured, what makes one market more affordable than another, and a repeatable method you can use to evaluate any U.S. market using current, reputable data. It is educational rather than a ranking — the goal is to help you read the numbers for yourself.

Why “affordable” depends on more than the sticker price

It’s tempting to judge a housing market by its median home price alone. The problem is that prices and incomes tend to move together: a metro with low home prices often has lower local incomes too, while an expensive metro may also have higher earnings. Looking at price in isolation can make a low-income, low-price market look more attainable than it really is for the people who live there.

A more useful way to think about affordability is as a relationship among three things: how much homes cost, how much households earn, and how much it costs to borrow. When you hold those three together, you get a far more honest picture of whether a typical household in a given place can realistically buy a typical home there.

The core metrics used to measure housing affordability

Several standard metrics capture that relationship. Each answers a slightly different question, and reputable housing organizations use them in combination.

Price-to-income ratio

The price-to-income ratio divides a market’s median home price by its median household income. A lower ratio generally signals greater affordability, because homes cost fewer years of local earnings. It’s a quick, intuitive comparison, though it doesn’t account for mortgage rates or down payments on its own.

Qualifying income and the affordability index

A second approach asks: how much income would a household need to afford the typical home in this market, given current mortgage rates and standard assumptions? Industry measures such as a housing affordability index compare that required (or “qualifying”) income to the actual median income — indicating whether a typical family earns enough to qualify for a loan on a typical home. The National Association of REALTORS® (NAR), for example, publishes affordability-index methodology along with its national and metro price data.

Priced-out share

Another lens is the share of households that cannot afford the median-priced home in an area. The National Association of Home Builders (NAHB) publishes “priced-out” estimates using this approach. It’s a helpful way to see how broadly affordability is felt, but read the basis carefully: NAHB’s priced-out estimates are built around new homes specifically, so they aren’t interchangeable with figures for existing or typical homes.

Monthly payment as a share of income

Finally, many analyses look at whether the monthly housing payment fits within a household’s budget. A common rule of thumb treats a home as “affordable” when the payment is no more than about 30% of monthly income, usually assuming a set down payment, a 30-year term, and typical taxes and insurance. Because the assumptions drive the result, it’s worth noting what down payment, rate, and costs any given figure uses.

A practical takeaway: whenever you see an affordability statistic, check which metric it uses and what assumptions sit behind it. Different methods can rank the same market differently.

What makes one market more affordable than another

Underneath the metrics, a few real-world drivers explain why affordability varies so much from place to place.

Local incomes and the jobs base. Affordability is partly a story about earnings. Markets where wages have kept pace with home prices tend to feel more attainable than markets where prices have outrun incomes.

Housing supply and inventory. When the number of homes for sale is tight relative to demand, prices face upward pressure; when supply is more plentiful, prices tend to be steadier. Understanding local supply is central to understanding price, which is why it helps to read up on how housing supply works.

Property taxes and insurance. Two homes with identical prices can carry very different monthly costs once local property taxes and insurance premiums are included — and those vary widely by state and even by county. These ongoing costs are easy to overlook but meaningfully change affordability, a theme covered in The True Cost of Homeownership.

Mortgage rates. Borrowing costs affect every market at once. When rates rise, the same home price translates into a higher monthly payment and a higher income needed to qualify; when they fall, affordability eases. Because rates change frequently, it’s worth checking current conditions — our Mortgage Rate Signals page tracks where rates stand.

A step-by-step method to evaluate a market’s affordability

Rather than relying on someone else’s “affordable markets” list, you can assess a market yourself in a few steps. The process is the same whether you’re curious about a single metro or comparing a few.

Step 1 — Find the metro’s median home price or typical value

Start with a current price figure for the metropolitan area (not a single neighborhood, which can be misleading). Reputable options include NAR’s metro price data, the Realtor.com data hosted on FRED, Zillow’s home value index, and Redfin’s data center. Each uses a slightly different methodology, so note which one you’re using and the period it covers.

Step 2 — Find the metro’s median household income

Next, look up the median household income for the same metro. The U.S. Census Bureau’s American Community Survey (ACS) is the standard public source. Use a single ACS release year and label it, so your price and income figures describe roughly the same period.

Step 3 — Compare price and income

With both figures in hand, compute the price-to-income ratio (price ÷ income) and, if available, compare the area’s qualifying income to its median income. This gives you a grounded sense of affordability relative to what local households actually earn — not just the headline price.

Step 4 — Factor in your own numbers

Market averages are a starting point, but your situation is specific. Plug in a realistic down payment, current rate, and estimated taxes and insurance to see what a payment might look like. Our Home Affordability Calculator and Mortgage Payment Calculator are built for exactly this, and How Much House Can You Actually Afford? walks through the budgeting side in more depth.

Step 5 — Re-check over time

Affordability is a moving target. Prices shift, incomes update annually, and rates can change week to week. Treat any snapshot as current “as of” its date, and revisit the numbers before relying on them.

Where to get current, reliable data — and how to read it

For price and affordability context, recognized sources include NAR (national and metro price context plus affordability methodology), Realtor.com data via FRED, Zillow, and Redfin. For income, the Census ACS is the standard reference. For mortgage-rate context, Freddie Mac’s weekly survey and the related FRED series are widely cited; check the latest release rather than relying on a remembered number. NAHB is a useful reference for priced-out methodology, clearly labeled as a new-home-based measure.

Two habits make this data trustworthy in your own analysis. First, record the source and the date for every figure, since housing numbers are revised and reported on different schedules. Second, don’t mix periods or methodologies — comparing a price from one source and year against an income from another can produce a misleading ratio. As a general matter, treat unsourced “cheapest places to live” roundups with caution and favor primary or well-established data providers.

Common pitfalls when judging affordability

A few mistakes come up repeatedly. Confusing metro, city, and neighborhood figures is one — a cherry-picked neighborhood price can look dramatically different from the metro median. Mixing time periods is another, as noted above. It’s also easy to ignore ongoing costs beyond principal and interest; taxes, insurance, and maintenance can reshape the picture (again, see The True Cost of Homeownership). Finally, “affordable to buy” and “affordable to rent” are different questions; if you’re weighing both, the Rent vs. Buy Calculator can help illustrate the comparison on consistent terms.

From market data to your own budget

Market-level affordability tells you about a place; your personal numbers tell you about a decision. Once you’ve sized up a market, the natural next step is to translate that into your own situation — income, savings, debts, and goals. The tools in our calculators hub are designed to bridge that gap, turning broad market data into figures that reflect your circumstances.

Key takeaways

Affordability is best understood as the relationship between prices, incomes, and borrowing costs, not price alone. The main metrics — price-to-income, qualifying income or affordability index, priced-out share, and payment-to-income — each illuminate part of the picture, and each depends on its assumptions. Local incomes, housing supply, taxes and insurance, and mortgage rates are the drivers that move affordability from place to place. With a consistent, source-and-date-labeled method, you can evaluate any market yourself rather than rely on an unsourced list.

A note on data and methodology

This article is for general educational purposes only and is not financial, lending, real estate, or investment advice. Housing prices, incomes, and mortgage rates change frequently and are reported differently by different sources, so any figures referenced reflect their cited source, date, and basis and may be out of date by the time you read this. What counts as “affordable” depends on individual circumstances. Always verify current data from the original sources and consider speaking with appropriate licensed professionals before making decisions about a home purchase.

Keep exploring

Want to put these ideas into practice? Use our Home Affordability Calculator and Mortgage Payment Calculator to see how prices, rates, income, taxes, and down payments fit together, and check current conditions on our Mortgage Rate Signals page. To go deeper on the numbers behind a purchase, read How Much House Can You Actually Afford?, and to understand local price pressure, see Home Inventory Explained.