Private School vs. a School District House Premium With Mortgage Rates Above 7%: The $307,600 vs. $90,000 Break-Even (September 2026)
Picture a family with a second grader and a $18,500-a-year private school on the shortlist. They are also looking at a house in a district with stronger public schools, and the listing has a roughly $90,000 premium over a comparable house one district over. Then the rate quote comes back above 7%.
This is the exact decision I ran the numbers on before making my own, and the market has moved enough this month that the answer can flip. This post walks through what changed, a worked example, and where your own inputs will overturn my example.
What changed in the market this month
Four data points matter for this decision.
Mortgage rates are still above 7%. NerdWallet's "Mortgage Rates Today, Friday, September 25: A Little Relief, but Still Above 7%" reports that rates fell today but remain solidly above 7%. A small dip doesn't change the math much. It changes how the house route feels.
The reason is the bond market. NerdWallet's "Why the Bond Market's Struggles Are Driving Up Mortgage Rates" says inflation, an AI borrowing boom and rising government debt are pushing bond yields to their highest levels in 20 years, and mortgage rates are climbing with them. This isn't a one-week blip you can wait out with confidence.
Inflation and wages are pulling in different directions. The Bureau of Labor Statistics' "Major Economic Indicators" page shows CPI at +0.4% in August 2026, unemployment at 4.1%, payroll employment at +162,000 (preliminary), and average hourly earnings up just $0.10 (preliminary). A $0.10 hourly gain is about $208 a year for someone working 2,080 hours. Even if that pace held for twelve straight months, it would add only about $2,496. Tuition typically rises faster than that (more on this below).
Stock market risk is part of the picture too. Mr. Money Mustache's "Will the AI Bubble Destroy our Retirement?" is about how the market can surprise you in both directions, and how to think about that when your retirement stash is at stake. The takeaway for a school decision is that tuition is a fixed, 13-year obligation. If you plan to fund it from a portfolio that swings with an AI-driven market, you're pairing a guaranteed bill with an uncertain source.
The worked example (my assumptions, not yours)
Everything below is an illustrative example I constructed. The market figures come from the articles above, while tuition, escalation, premium and down payment are placeholders.
Assumptions:
- Private tuition: $18,500 in year one, rising 4% a year
- Horizon: 13 years (K-12)
- House premium: $90,000, with 20% down ($18,000) and $72,000 financed
- Mortgage rate: 7.0%, 30-year fixed
- Property tax on the premium: 1.1% of $90,000 (about $990 a year)
- Cash earning 4% if you kept it instead of using it as a down payment
- Selling costs at the end: 6% of the premium ($5,400)
- The premium holds its value (a big assumption, see below)
Private tuition over 13 years
At 4% annual escalation, 13 years of tuition sums to about $307,600. That's 16.6 times year-one tuition, not 13 times.
The house premium over 13 years
| Cost component | 13-year amount |
|---|---|
| Interest on $72,000 at 7% (about $479/month payment) | about $59,800 |
| Property tax on the premium | about $12,900 |
| Foregone growth on the $18,000 down payment | about $12,000 |
| Selling costs at 6% | $5,400 |
| Net cost if the premium holds | about $90,000 |
The principal you pay down (about $15,000) comes back as equity, and the premium itself comes back when you sell, so neither is a cost in this framing. What you lose is interest, tax, opportunity cost and transaction costs.
Side by side
| Private school | School district premium | |
|---|---|---|
| 13-year net cost, one child | about $307,600 | about $90,000 |
| Two children (same years) | about $615,200 | about $90,000 (same house serves both) |
| Cost risk | Tuition can rise faster than you planned | The premium can shrink or grow |
| Can you exit early? | Yes, switch to public any year | Costly (about $5,400 in selling costs plus rate reset) |
| Locked into a rate? | No | Yes, at today's 7%+ |
On these assumptions the house route costs roughly $217,600 less for one child, and the gap widens with each additional child. If you want to see how the two-kid version plays out in more detail, Private School vs. Public School for Two Kids covers the scaling.
This is the kind of analysis Zuvelanti runs for you, so you don't have to build the spreadsheet yourself.
Where this example breaks down
I'd be misleading you if I stopped at "house wins." The example depends on assumptions that may not fit your family.
1. If you already own a house with a low rate
The table above assumes you're buying. If you already have a mortgage well below 7%, moving to a better district means swapping that rate for a 7%+ one on the whole balance, not just the premium. That can dwarf the $90,000 figure. In that case private school, which needs no move, can come out ahead. The post Mortgage Rates Cross 7% After the September Fed Hike walks through why the rate environment matters so much here.
2. If the premium doesn't hold
I assumed you'd recover the full $90,000 on sale. If the premium fades by 20%, that's another $18,000 in cost. If it grows, the house looks even better. School district premiums are not guaranteed, and a higher-rate market can compress prices in some areas while others hold.
3. If tuition rises faster (or slower) than 4%
Here's how sensitive the 13-year tuition total is to the escalation rate on $18,500 of year-one tuition:
| Annual tuition increase | 13-year total |
|---|---|
| 3% | about $288,900 |
| 4% | about $307,600 |
| 5% | about $327,700 |
One point of escalation moves the total by about $19,000 to $20,000. With CPI at +0.4% for the month, it's tempting to assume tuition will stay tame. Check your school's actual increase history rather than guessing.
4. If you qualify for an ESA or voucher
Say your state offers $7,000 a year toward private tuition (again, a placeholder). Over 13 years that's $91,000, which drops the net tuition to about $216,600. Notice how close $91,000 is to the $90,000 house premium. In this example a voucher is worth about as much as the entire house premium, but the two aren't mutually exclusive, and eligibility rules vary a lot by state and income. If this applies to you, it may be the single biggest variable in the model.
5. If you could invest the difference
Suppose you chose the public route and invested the $18,500 (growing 4% a year) in tuition-equivalent contributions at an assumed 6% return. After 13 years that would be roughly $432,800. That's the opportunity cost of the private route. It's also where Mr. Money Mustache's warning about market volatility comes in: 6% is an assumption, not a promise. In a rough decade the pile could be far smaller, and in a good decade far larger.
The safe implication is about matching. Money for a bill due next year shouldn't depend on the market's mood.
The hidden variables people skip
College admission probability. Some families pay for private school partly for college outcomes. That's a real input, but it should be a number you assign and then test. Ask yourself: if the school raises your child's odds of admission to a school you care about by some amount, what is that worth in dollars, and what would it need to be worth to justify a $217,600 gap? Evidence on this varies by school and student, so I won't hand you a percentage.
Multi-child scaling. Tuition scales per child, and the house premium doesn't. That single fact is why families with two or three kids often reach a different conclusion than single-child families. For a step-by-step version, see How to Calculate Private School's True 13-Year Cost When Mortgage Rates Cross 7%.
Cash flow versus total cost. The house premium costs about $479 a month in principal and interest on the premium alone, plus tax, from day one. Tuition is lumpy: it's due in big installments. Whichever route you choose, check that it fits your monthly budget, not just the 13-year total.
Wage growth. With average hourly earnings up only $0.10 in August (preliminary), a household budgeting for 4% tuition escalation is probably assuming income growth it may not get. Stress-test the plan with flat income.
A note on bank bonuses
NerdWallet's "Should I Switch to a New Bank Just to Earn a Bonus?" points out that bonuses usually take effort to earn, and you should weigh that before chasing one. For school planning, a bonus is a small tailwind, not a strategy. Say a hypothetical $300 bonus took you five hours of paperwork and minimum-balance babysitting. That's helpful for a year-one supply list, and it doesn't move a $307,600 decision. Where it can matter is parking tuition or ESA money you'll spend within twelve months. There, a slightly better yield on cash is a reasonable consideration, as long as the effort and account rules are worth it to you.
A quick self-check before you commit
Run through these in order:
- Do you already own? If yes, what's your current mortgage rate versus 7%+?
- What's the real premium for the district you'd move to, based on comparable sales, not a rule of thumb?
- What's the school's actual tuition history, not just this year's price?
- Do you qualify for an ESA or voucher, and for how many years?
- How many children, and how far apart in age?
- Where would the money come from, and how exposed is it to a market drop?
- What number do you assign to any college admission benefit?
- Can you switch course if year three doesn't go as planned? Private school is easier to leave than a house.
None of these has a universal right answer. A family with a 3% mortgage, one child and a generous ESA may find private school clearly cheaper. A family renting, with three children and no voucher, may find the house premium wins by a wide margin. Families with two kids and a flexible move often land in between, and the Private School vs. a Better School District With Mortgage Rates Above 7% post shows a similar comparison from another angle.
The bottom line
Above-7% mortgage rates, 20-year-high bond yields, +0.4% monthly CPI and a $0.10 wage gain make this a hard moment to guess. In my example, the house premium cost about $90,000 against $307,600 in tuition, but the answer flips or narrows with a low existing mortgage rate, a shrinking premium, faster tuition increases or a generous voucher. Your numbers will differ based on your specific situation, and the gap between examples like mine and your reality is exactly where the decision gets made.
If you want to stop guessing, you can model your own tuition trajectory, house premium, ESA, number of kids and mortgage rate at Zuvelanti. Put in your real inputs, look at the 13-year totals side by side, and let the math speak for itself.
Sources
- Will the AI Bubble Destroy our Retirement? — Mr. Money Mustache
- Major Economic Indicators Latest Numbers — Bureau of Labor Statistics
- Why the Bond Market’s Struggles Are Driving Up Mortgage Rates — NerdWallet
- Mortgage Rates Today, Friday, September 25: A Little Relief, but Still Above 7% — NerdWallet
- Should I Switch to a New Bank Just to Earn a Bonus? — NerdWallet