How Much Income Should Go to Housing? (30% Rule)

You did the math and it came out wrong. The apartment costs what it costs, your paycheck is what it is, and every calculator on the internet keeps telling you the same thing about how much of your income should go to housing. Thirty percent, no more. Then you look at the listings in your city and 30% buys a commute, a roommate, or nothing at all.

The rule is real. It is written into federal housing policy. But a benchmark only works when the underlying numbers cooperate, and for tens of millions of American households they stopped cooperating a long time ago. Here is where 30% came from, what it actually buys, and why so many people cannot reach it no matter how they budget it.

Where did the 30% housing rule come from?

Not from a bank, and not from a personal finance blog. It came from Congress.

In 1969, the Brooke Amendment capped rent in federally subsidized public housing at 25% of a tenant's income. In 1981, Congress raised that cap to 30%. That number leaked out of public housing policy and became the general-purpose definition of affordability: the line HUD and the Census Bureau still use to classify a household as cost burdened.

So the 30% figure was never a scientific finding about how much housing people can absorb. It was a policy ceiling for subsidized rent that hardened into common sense. It stuck because it was simple, and because for decades it roughly matched what ordinary wages could cover. That last part is the piece that broke.

How much of your income should go to housing today?

The benchmark still says 30% of gross income, and that number includes utilities, not just the rent or mortgage payment. Most people budget the rent and forget the rest, which is why the real burden lands higher than the spreadsheet predicted.

Run it against actual incomes and the rule stops being abstract fast.

Median gross rent nationally runs near $1,400 a month (U.S. Census, American Community Survey), and that national middle buries the metros where the same apartment costs double. Median household income is about $80,000 (U.S. Census, 2023). The federal minimum wage is $7.25 an hour, unchanged since 2009 (U.S. Dept. of Labor).

That $377 figure is the whole argument in one number. There is no American housing market where $377 a month covers a place to live. The rule has not failed the worker. The wage has failed the rule.

What happens when housing takes half your paycheck?

The federal measure has a second tier. Above 30% you are cost burdened. Above 50% you are severely cost burdened, and roughly one in four renter households now sits there.

Crossing 50% is not a lifestyle choice with tradeoffs. It is the point where the rest of the budget stops working. Groceries get thinner, the car repair gets deferred, the prescription gets stretched, and savings become theoretical. A household paying half its income in rent has no capacity to absorb a $500 surprise, which is why a single emergency so often becomes an eviction. We trace that mechanism in what a housing cost burden actually does and in the broader housing crisis.

Does the 30% rule work for buying a house too?

Lenders use their own version, and it is stricter than most buyers expect. The common underwriting guideline puts housing costs (principal, interest, taxes and insurance) near 28% of gross income, with total debt payments under roughly 36% to 43% depending on the loan program.

The trouble is what those percentages now have to stretch over. Median U.S. home sale prices have run roughly $400,000 to $420,000 (NAR / Census), putting homes near five times median household income. In the 1980s that ratio sat closer to two or three. Same rule, same percentage. The house on the other side of it is not the same house. Run the numbers for yourself at what you can afford on an $80,000 salary or on $100,000 and the gap between the guideline and the listing becomes obvious.

Is the 30% rule still useful at all?

As a diagnostic, yes. As a budgeting target, not anymore.

Its remaining value is that it measures the distance between what housing costs and what work pays. When half of renters cannot hit a benchmark built for subsidized housing in 1981, the benchmark is doing its job. It is telling you the market has detached from wages. That is a signal, not a personal failing.

The rule also flattens some things it should not. Thirty percent of $200,000 leaves a great deal of money for everything else. Thirty percent of $25,000 leaves almost nothing, because the remaining costs of being alive are not proportional to income. Food, insurance and a working car cost roughly the same whether you earn $25,000 or $250,000. A flat percentage hides that asymmetry, which is one reason researchers now favor residual-income measures, meaning what is left after housing, over the percentage. The mechanics of that comparison sit in rent-to-income ratio and the 30% rule for rent.

Why can't wages reach the rule anymore?

Because housing costs and paychecks stopped moving together, and the gap has been widening for four decades.

Home prices climbed against income until the ratio roughly doubled. Rents rose faster than wages across most of the country. Meanwhile the federal wage floor has not moved since 2009, and the pay just above it has crept rather than climbed. The 30% rule was calibrated to an economy where a normal job covered a normal home. That economy is what changed. Not the arithmetic, and not the people doing it.

Supply is part of it: decades of underbuilding, restrictive zoning, and a construction industry aimed at the top of the market. Ownership is part of it too, as investors bought into single-family housing and competed with first-time buyers for the same starter stock. But the piece that gets discussed least is the simplest one. If the wage had tracked the cost of the roof, none of this would be a national emergency. The full picture runs through what affordable housing actually means and across the wider American dream.

So how much of your income should go to housing? Thirty percent, and that answer is still right. The question worth asking is why a full-time job in the richest country on earth so often cannot reach a ceiling that was written for subsidized housing in 1981. Households did not get worse at budgeting. Housing outran the paycheck, and no percentage rule can close a gap that policy opened.