The claim this post is answering

When homelessness counts rise and the regional bill is already in the hundreds of millions, a familiar argument shows up: stop writing checks for shelter and services and lock people up. It sounds like a cheaper, simpler alternative. It is not.

Against King County's current labeled homelessness investment, a year of real incarceration is at least twice as expensive per person — and four to ten times as expensive if you use the jail we actually run. That gap is also a ceiling. Once homelessness programs spend prison-level money per person, the political line writes itself: you might as well incarcerate. We are not at that line. Treating it as if we were is how a $20,000 program gets talked about as if it were already a jail.

What we spend now

Do not add Seattle's homelessness budget to KCRHA. Seattle already writes most of the KCRHA check.

$225.2 million is the City of Seattle's proposed 2026 citywide homelessness budget. $206.9 million is the regional authority's 2025 budget. A clean 2026 stack — Seattle, plus the part of KCRHA that is not Seattle, plus county Health Through Housing — is about $367.0 million. That is shelter, outreach, prevention, and housing contracts. It is not emergency-room time, police time, or jail time. Seattle HSD 2026 proposed budget Center Square — KCRHA budget

The 2026 King County point-in-time count is 18,365 people (11,829 people unsheltered). Divide the annual budgets by that snapshot and you get a per-person figure that is too high if you think of it as a benefit check — people flow in and out — and too low if you think it covers every hospital and booking those same people generate. It is still the right denominator for the question people actually ask: what are we spending, per person on the street tonight, on the homelessness system? KCRHA 2026 PIT initial report

$11,264 is KCRHA alone per PIT person. $19,984 is the broader labeled stack. $33,718 is what King County actually pays to operate one Health Through Housing unit for a year — the closest thing in this system to "keep one person indoors."

Seattle HSD 2026 proposed budget KCRHA 2026 PIT initial report King County Health Through Housing 2024 annual report

What incarceration costs

A year in a Washington prison, with health care, is $81,041. That is the state's own FY2025 average: $222.03 a day. King County's contracted jail daily rate, inflated from the 2021 city–county agreement, is about $90,900. Detention plus Jail Health, spread over the 2023 secure population, is about $195,700. WA DOC FY2025 cost per incarcerated person per day Seattle–King County jail interlocal rates (CF 321799)

Those are averages — last year's factory divided by today's headcount — not the cost of booking one extra person into a unit that already has empty beds. The next person in an open unit is mostly food, laundry, and some medicine. That number is small. It is also the wrong number for this argument. Replacing the homelessness system with incarceration means holding thousands of people for a year, not slipping one more person onto an already-staffed tier. That requires the average: 24/7 posts, a clinic you cannot refuse, and, past a point, a new building. King County has already scoped replacing the downtown jail at more than $1 billion.

WA DOC FY2025 cost per incarcerated person per day Seattle–King County jail interlocal rates (CF 321799)

What the floor already buys

The projected number of people in custody is the caseload corrections departments already forecast. Crime rates sit upstream of arrests, and arrests sit upstream of sentences. They are not a rate you can multiply by a city's population and get next year's prison count. The floor is the spend required to hold the caseload current law already implies.

States spent about $63.60 billion in 2023 on the people already in prison — a bit over a million at year-end, according to the Bureau of Justice Statistics. Median state spending was $60,989 per prisoner. Mississippi was just under $20,000. Massachusetts was $284,976. Six states (Alaska, Connecticut, Delaware, Hawaii, Rhode Island, and Vermont) run jail and prison as one system, so their per-person figure mixes both. That total is the floor for a caseload that already exists. USAFacts — state spending per prisoner, 2023

Sources: WA DOC FY2025 cost per incarcerated person per day; USAFacts — state spending per prisoner, 2023; Texas LBB uniform cost report, FY2021-22; Florida EDR — DOC per diem and bed costs, 2026 session; Illinois DOC FY2025 financial impact statement; LA Almanac — county jail system budget and population; LASD custody population, 2024 year-end; Seattle–King County jail interlocal rates (CF 321799); NYC Comptroller — FY2021 cost per incarcerated person.

Washington's floor is the bill it already paid and the caseload it already forecasts. FY2025 institution costs, including health care and excluding headquarters administration, were $1.06 billion for an average daily population of 13,027 people. The February 2026 forecast puts prison and work release at 14,097 people; the January count was 13,945, 98.9 percent of that forecast. Holding the people the state already expects does not require a new prison. It is the system that produced that bill. WA DOC FY2025 cost per incarcerated person per day WA DOC population compared with forecasts, February 2026

The average cost per person falls while added people fit in beds the state is already operating. The March 2026 fact card lists confinement operational capacity of 14,736 beds and a prison count of 13,019 people, 88.3 percent of that capacity. The gap is 1,717 people. Fill those beds and the same posts, clinic, and perimeter are spread over a larger count, so the average goes down. The further beds, up to 17,474, are what DOC labels prison facilities and statewide emergency beds, and that total includes warm-closed, offline, and repurposed beds. Opening those is a new fixed cost. That is where the average starts rising. WA DOC agency fact card, March 2026

1,717 people is a state prison figure. King County's unsheltered count is 11,829 people. A staffed prison bed and a county jail bed are different inventories. KCRHA 2026 PIT initial report WA DOC agency fact card, March 2026

California is the same shape at a larger scale. The Governor's 2024-25 proposal was about $14.50 billion to operate the Department of Corrections and Rehabilitation. That figure includes parole, and about $4.10 billion of it is health care. It is not a prison-only budget, and dividing it by the prison count would overstate the cost of a cell. The projected average daily prison population that year was 91,700 people. The same budget kept nearly 15,000 beds in operation. The Legislative Analyst's Office said the empty-bed count could reach about 19,000 by 2028, enough in their judgment to close around five more prisons and save nearly $1 billion a year. Filling beds the state is already paying to staff lowers the average. The average rises once that slack is gone. A federal court cap limits state-owned prisons to 137.5 percent of design capacity, 103,853 people. LAO — 2024-25 CDCR budget California Governor's Budget — CDCR, 2024-25

Florida writes the steps down. For fiscal impact statements, the Criminal Justice Estimating Conference uses FY2024-25 Department of Corrections figures: a variable operating cost of $12,111 for the first 499 added beds, a dorm and work-camp package of $21,378 at every 500 beds, and the full operating cost of $34,898 at every 1,500 beds. The cheap marginal cost applies only inside that first step. A new dorm is the first point where the average steps up. A new 1,500-bed unit is where the average reaches the full operating number. The same sheet prices a new bed's construction at about $90,000. That is capital, not the annual cost of holding someone. Florida EDR — DOC per diem and bed costs, 2026 session

Texas publishes a uniform cost and a small fixed-overhead slice, not a spare-bed count. The Legislative Budget Board put the FY2022 systemwide cost of state-operated facilities at $77.49 a day, about $28,284 a year. Fixed allocated costs — classification, transportation, warehousing, and similar overhead — were $5.12 a day. Nearly all of the average is the operation itself. Texas LBB uniform cost report, FY2021-22

Illinois reports $52,843 for FY2025: facility expenditures divided by the average daily population. That is an average. The impact statement does not say how many additional people the current prisons could take before that average turned up. Illinois DOC FY2025 financial impact statement

New York City's average is high because the staff stayed while the jail population fell. The Comptroller's full annual cost was $556,539 in FY2021, $1,525 a day, up from $144,176 in FY2011. The full cost excludes debt service, judgments, and legal services. Vera's look at the FY2024 budget was still describing a cost above $550,000, and in 2022 the department had about 1,500 more correction officers than people in detention. Extra people in a jail already staffed past its headcount would pull that average down. The city has not published the bed count at which the average would turn back up. NYC Comptroller — FY2021 cost per incarcerated person Vera — FY2024 NYC Department of Correction budget

Los Angeles County is past that line. The Sheriff's 2024-25 budget is $4.1 billion, and the county CEO assigns $994.4 million of it to the jail system. The 2024 average daily inmate population was 12,561 people. Spread over that count, the jail budget is about $79,166 per person — a budget year laid over a calendar-year count, so treat it as the scale, not a published per diem. Board of State and Community Corrections rated capacity is 12,404, including Pitchess East, a 926-bed facility that held 16 people. That is a mothballed jail. Excluding East, the rest of the system ran about 4 percent over rated capacity. Men's Central Jail, Pitchess North, and North County were over their own ratings. More people here means crowding, overtime, or another facility. LA Almanac — county jail system budget and population LASD custody population, 2024 year-end

Harris County is already buying the rising part of the curve. The FY2024 budget narrative says the jail averaged about 9,500 people in 2023, against about 8,700 before Harvey and about 8,000 at the COVID peak. Outsourcing beds to Garza County and LaSalle cost about $37 million, and jail overtime was 16.1 percent of the sheriff's labor budget. The county does not publish a clean all-in cost per person. The population is past the level the existing jail was staffed for, and the extra people show up as overtime and out-of-county beds. Harris County FY2024 proposed budget

None of this spare capacity is a homelessness program. Washington can add 1,717 people inside prisons that are already open. California is already paying to keep nearly 15,000 beds empty. Both are room inside systems that already cost far more per person than the regional homelessness stack. Filling them lowers the incarceration average. It does not make a prison the cheaper way to house someone.

WA DOC agency fact card, March 2026 WA DOC population compared with forecasts, February 2026 LAO — 2024-25 CDCR budget Vera — FY2024 NYC Department of Correction budget Harris County FY2024 proposed budget

At least 2× — and usually more

Give incarceration every benefit of the doubt. Compare the cheapest real custody average we have, a state prison bed, to the most expensive homelessness product we have, an operated Health Through Housing unit:

Sources: King County Health Through Housing 2024 annual report; KCRHA 2026 PIT initial report; WA DOC FY2025 cost per incarcerated person per day; Seattle–King County jail interlocal rates (CF 321799).

Against the regional homelessness stack of about $20,000 per PIT person, prison is 4× and the jail we actually run is 10×. "At least twice as expensive" is the floor, not the headline.

Scale that to the people the "just lock them up" line is aimed at. A full year of prison for 11,829 people who are unsheltered is about $958.0 million. Jail all-in is about $2.32 billion. The labeled regional homelessness budget is about $367.0 million. Even the cheap version of the swap — prison, not jail — is 2.6 times what the homelessness system spends now, and it still would not be housing. KCRHA 2026 PIT initial report

Why that number is a ceiling

Jail and prison prices do two jobs in this debate.

They are a price check on the lock-them-up alternative. If the question is "would incarceration save money versus what we already spend to address homelessness?" the answer is no. You would spend at least twice as much per person, and several times as much if those people landed in King County jail — which is where a local crackdown actually sends them. Prison is a state bed. Seattle does not have 12,000 of those standing empty. Washington's staffed operational headroom is about 1,717 people, counted above. WA DOC agency fact card, March 2026

They are also a political ceiling on homelessness investment. The moment a homelessness program costs as much per person as a prison, a critic does not need a theory of recovery. They only need a sentence: at that spend, you might as well incarcerate. That sentence is why the incarceration price sits on top of the homelessness budget even when nobody is proposing a new jail. It caps how generous services are allowed to look.

Two things follow, and they cut in opposite directions only if you skip the arithmetic.

We are not at the ceiling. $19,984 is not $81,041. You could double the current labeled regional stack and still be cheaper than the cheapest real incarceration average. You could more than quadruple it and still be under King County's all-in jail bed. The ceiling is an argument for headroom, not for a freeze.

Crossing the ceiling would not make incarceration the wiser buy. A prison year is expensive because it is a lock plus a clinic, staffed every hour, for a population that is sicker than the one homelessness programs serve on an average night. Paying prison-level money for housing and treatment still buys a lease, a case manager, and a door that opens from the inside. Paying it for jail buys a post and a duty to treat whoever is in the cell. If a homelessness program ever did hit $81,000 per person, the right question would be whether that program had become a jail with worse legal process — not whether the original $20,000 stack had been a waste.

There is a third, narrower reading of the ceiling that is easy to miss. Today's $81,000 and $196,000 figures are averages over the people already in custody. King County's jail population fell from about 2,000 in 2017–19 to about 1,400. The buildings and the clinic did not shrink with it, so the average went up. The staffed slack in Washington's prisons is a different inventory: about 1,717 people inside operational capacity. The county unsheltered count is 11,829 people. Put 12,000 new people into the county jail and you do not get 12,000 extra beds at $15 a day. You fill the empty bunks, then you open units, then you need a new jail. The average does not stay put. The $1 billion replacement conversation is what the ceiling looks like in concrete. KCRHA 2026 PIT initial report WA DOC agency fact card, March 2026

What this is not saying

It is not saying homelessness programs are cheap enough, or that $225 million in Seattle is well spent. KCRHA took in $533.9 million from inception through July 2025; a 2026 city-commissioned review found overspend without required approval. Waste in the current stack does not make jail the discount option. KCRHA forensic evaluation (Clark Nuber, Apr 2026)

It is not saying nobody in the unsheltered population belongs in a locked setting. Some people need a civil hospital bed or a jail bed because they are dangerous or gravely disabled. That is a clinical and legal question. It is a different question from "is incarceration a cheaper substitute for the homelessness budget?"

It is not comparing jail to the all-in social cost of homelessness — emergency rooms, stolen goods, lost park use. Those costs are real and mostly not in the $367 million. Adding them would raise the homelessness-side total. It would not lower the price of a prison year. If the honest all-in number on the street is higher than $20,000, the ceiling moves up with it. The lock-them-up alternative still has to beat that number, at scale, after you build the beds.

KCRHA forensic evaluation (Clark Nuber, Apr 2026)

The line

Incarceration is not a cheaper alternative to the existing investment in addressing homelessness. On the most conservative apples-to-apples comparison we can make — a state prison bed versus an operated supportive-housing unit — it is a little more than twice as expensive. Against the regional homelessness budget per person on a given night, it is four to ten times as expensive. That ratio is the ceiling. It is high enough that the region can spend substantially more on housing and treatment and still be cheaper than locking the same people up. It is not a reason to spend like a jail and then call the jail a savings.