The case for private school usually goes something like this: better outcomes, smaller classes, more focused environment, and the kind of network and signaling value that pays dividends for decades. It's a case that sounds compelling and, in specific circumstances, is compelling. But it rests on an assumption that doesn't hold in all fifty states equally: that the private school option is actually better than the public school option in the same area.
In several states, that assumption falls apart badly. The public school system is so strong, or the private school options so expensive relative to what they deliver, that paying for private school means spending $15,000 to $40,000 a year per child to achieve outcomes you could have gotten for free.
The Research Problem Nobody Talks About in Private School Brochures
Before getting to the states, the underlying research context matters. The raw test score advantage that private schools appear to hold over public schools is largely a demographic artifact, not a school quality effect.
A landmark study by Sarah Theule Lubienski and Christopher Lubienski, published in the American Educational Research Journal in 2006, analyzed data from the 2003 National Assessment of Educational Progress covering 13,577 schools and 343,000 students. Their finding: after controlling for student demographics, the private school advantage in math achievement disappeared and, in most cases, reversed. Public school students with similar socioeconomic backgrounds outperformed their private school peers.
The same result has been replicated multiple times. As the Boston Review summarized the Lubienskis' follow-up book, "The Public School Advantage," the researchers chose math specifically because it is learned primarily in school rather than at home, making it a purer measure of school effectiveness. Public schools outperformed demographically similar private schools by as much as 12 score points on a 500-point scale, a difference equivalent to more than a full grade level, when comparing students with similar socioeconomic backgrounds.
This does not mean private school is never worth it. It means the popular assumption that private schools are simply better at educating children is not well-supported by the evidence once you compare apples to apples. In states where the public school system is genuinely strong, the case for paying private school tuition gets very hard to make academically.
Massachusetts: Where Private School Costs the Most and Public Schools Are the Best
The most financially irrational private school market in the United States is probably Massachusetts. The state has the highest NAEP scores in the country, has ranked number one in public school quality across virtually every credible national comparison for over two decades, and sends a higher percentage of its public school graduates to selective colleges than almost any other state's public school population.
At the same time, according to Education Data Initiative's analysis, Massachusetts is the most expensive state in the country to send a high school student to private school, with secondary private schools averaging among the highest tuition in the nation. Private high school in Massachusetts can run $30,000 to $60,000 per year at elite boarding schools. Even day school tuition for high school averages well above the national average of $16,420.
The math in Massachusetts is brutal for private school advocates. You are paying a premium that rivals college tuition to exit a public school system that outperforms most of the world, in order to enter a private school system that, after controlling for demographics, does not demonstrably produce better outcomes. The families who choose private school in Massachusetts are paying for intangibles: specific social networks, religious education, or the particular culture of specific institutions. Those are legitimate reasons. Academic advantage is not one of them in this state.
New Jersey: Top-Tier Public Schools at Private School Prices
New Jersey runs the same dynamic as Massachusetts but with an added wrinkle. The state consistently ranks second or third in national public school quality comparisons, with NAEP scores near the top nationally and per-pupil spending of $26,747, the highest in the country according to ConsumerAffairs' 2026 rankings. New Jersey's suburban public schools, particularly in Millburn, Tenafly, Westfield, and the Livingston-Chatham-Madison corridor, produce outcomes that compete directly with the state's elite private schools.
Private school tuition in New Jersey averages above the national average, with high school tuition at top private schools running $35,000 to $50,000 annually. A family with two children in private school for grades nine through twelve in New Jersey could spend $280,000 to $400,000 over those four years, exiting a public school system in the top two or three nationally by quality.
The specific circumstances where private school makes sense in New Jersey, religious education, a child whose needs aren't met by the public system, a particular school's specific programming, are real. The general argument that public schools in New Jersey aren't good enough is not.
Connecticut: Most Expensive Private Schools, Already-Excellent Public Schools
Connecticut has the highest average private school tuition of any state in the country. According to Education Data Initiative, the average private high school in Connecticut costs $39,344 per year. The average across all K-12 private schools is $28,433 annually. These figures reflect the concentration of elite boarding schools in the state, including several of the most expensive and prestigious prep schools in the world.
Connecticut's public schools, meanwhile, rank near the top nationally. ConsumerAffairs ranked Connecticut second overall for public education in 2026, noting the state holds the highest average ACT score in the country at 26.5 and spends $25,516 per student in its public schools. Towns like Darien, New Canaan, Westport, Greenwich, and Fairfield have public schools that perform at levels comparable to many private schools nationally, at zero cost to families with children in those districts.
The argument for paying Connecticut private school tuition is not academic quality. It's branding, network, and specific institutional culture. Those things have value for specific families. But for a family in Darien or New Canaan whose child attends one of the state's top-ranked public high schools, the $39,000 annual tuition for a comparable private school experience is extraordinarily hard to justify on educational grounds.
Virginia: Where the Public School System Punches Above Its Weight
Virginia is a more interesting case than the northeastern states because it's not universally recognized as an elite public school state in the way Massachusetts and New Jersey are. But Virginia has quietly built one of the strongest public school systems in the country. The state posted 74.2% reading proficiency on its state assessments, the highest figure in allk12's state-level data, and its demographically adjusted NAEP scores place it among the top performers nationally.
More specifically, Virginia's top suburban school districts, Loudoun County, Fairfax County, and several Northern Virginia districts, produce outcomes that exceed what most private schools in the region deliver. Thomas Jefferson High School for Science and Technology in Alexandria, a public magnet school, is consistently ranked among the top five public high schools in the country. U.S. News and World Report's 2025-2026 rankings place it fifth nationally.
In Northern Virginia, paying private school tuition means paying to leave one of the highest-performing public school systems in the country for a private alternative that, in most cases, does not outperform it academically. The calculation changes south of the Northern Virginia corridor, where public school quality is more variable and the private school option may genuinely represent an upgrade. Geography matters inside this state.
Minnesota: Strong Public Floor, Limited Private Premium
Minnesota doesn't make national headlines for public school quality the way the northeastern states do, but its public school system has historically outperformed the national average consistently. The state's suburban districts around Minneapolis-Saint Paul, including Edina, Wayzata, Minnetonka, and Rosemount-Apple Valley-Eagan, produce outcomes that compete with the state's private school options at a fraction of the cost.
Private school tuition in Minnesota runs below the national average, which means the cost is lower than in the northeast. But the public school quality is high enough that the premium doesn't have a clear academic justification in the state's stronger suburban districts. For families in Edina or Wayzata, the argument for private school is primarily values-based or socially motivated, not academically motivated.
The States Where Private School Is More Defensible
The analysis cuts the other direction too. There are states where the public school system is weak enough, and the private school options strong enough, that paying for private school can represent a genuine academic upgrade.
In states like Nevada, Arizona, and New Mexico, which rank near the bottom of national public school comparisons, the gap between the average public school experience and a well-run private school is real and meaningful. Families in these states who choose private school for academic reasons are making a decision the data supports more clearly than their counterparts in Massachusetts or New Jersey.
Urban districts in high-quality states tell a similar story. A family in Boston or Newark faces a different calculation than a family in Wellesley or Millburn. The state average in Massachusetts and New Jersey is excellent. The urban district experience within those same states can be significantly below that average. Private school can make academic sense in Newark even if it doesn't in the Morris County suburbs.
What To Think About
The right question isn't whether private school is worth it in your state. It's whether private school is worth it compared to the specific public school your child would attend. A family in an excellent public school district in Massachusetts, New Jersey, Connecticut, or Virginia is making a very different calculation from a family in an underperforming district in the same state.
Public School Review's 2025 analysis is direct on this point: research finds no consistent academic advantage for private schools when controlling for demographics, and broad performance gains from private school choice programs are not evident statewide. The burden of proof is on the private school to demonstrate the premium is justified for a specific child in a specific context, not on the public school to prove itself worthy of the comparison.
Browse the public school options in your area on allk12, look at the test score histories for the specific schools your child would attend, and read what parents and teachers in those schools are saying in the discussion boards before concluding that a private school alternative is worth the premium. In the strongest public school states, the data may surprise you.
Sources
Lubienski & Lubienski (2006): School Sector and Academic Achievement, American Educational Research Journal
Boston Review: Why Public Schools Outperform Private Schools
Education Data Initiative: Average Cost of Private School by State
ConsumerAffairs: Best States for Public Education 2026
The School House: Best Public School Systems by State 2025
Public School Review: Private vs. Public School Reality Check 2025
U.S. News: 2025-2026 Best High Schools Rankings
