$150K Salary in Naperville, IL vs. Franklin, TN: Property Taxes, No Income Tax, and the Real Take-Home Pay Gap for Top School Districts
The Same $150K Offer, Two Very Different Tax Bills
You've got a $150,000 offer, and you're deciding between two towns that both show up on "best schools in America" lists: Naperville, Illinois, outside Chicago, and Franklin, Tennessee, outside Nashville. Same salary. Same goal — a good district, a decent house, a shot at actually saving money. But one of these states taxes your paycheck at a flat 4.95% and the other doesn't touch it at all. One has property tax rates nearly four times higher than the other. And the "cheaper" state has the pricier houses, because everyone else figured out the no-income-tax math too.
This is exactly the kind of decision that gets flattened into a single cost-of-living index number, when the real answer depends on your specific salary, your specific home price point, and how many kids you're sending through 13 years of school. Let's build the actual comparison instead of guessing.
State Income Tax: Illinois's Flat 4.95% vs. Tennessee's Zero
Illinois taxes all wage income at a flat 4.95%, regardless of how much you make — there's no bracket structure to climb into, but there's also no low-income relief once you're above the standard exemption. On a $150,000 household income, after Illinois's personal exemptions (roughly $5,700 combined for a married couple filing jointly), taxable income lands around $144,300. At 4.95%, that's a state tax bill of $7,143 a year.
Tennessee eliminated its last remaining tax on investment income (the Hall Tax) in 2021 and has never taxed wages. On the same $150,000 salary, the Tennessee state income tax line is $0.
That's a $7,143 head start for Franklin before you've even talked about houses. It's the same dynamic we walked through when comparing Grand Rapids to Nashville and in the Cincinnati vs. Nashville tax burden breakdown — Tennessee's no-income-tax edge is real, but it's never the whole story.
Property Tax: Where "No Income Tax" Gets Complicated
Here's where a lot of relocation math falls apart. People hear "no state income tax" and assume the whole state is a tax bargain. Illinois, meanwhile, has a reputation for high property taxes — and it's earned. The effective property tax rate in the Naperville area (DuPage/Will County) runs around 2.2% of assessed home value, among the highest in the country. Williamson County, Tennessee — where Franklin sits — has an effective rate closer to 0.62%, one of the lowest.
But Williamson County isn't cheap. Its schools are exactly why families move there, and the housing market has priced that in. For this comparison, assume a comparable single-family home in a top-rated elementary zone:
| Cost Category | Naperville, IL | Franklin, TN |
|---|---|---|
| Example home price (top school zone) | $575,000 | $675,000 |
| Effective property tax rate | ~2.2% | ~0.62% |
| Annual property tax | $12,650 | $4,185 |
| Est. mortgage P&I (20% down, 6.5%/30-yr) | $34,890 | $40,954 |
| Homeowners insurance (est.) | $1,800 | $2,000 |
| Combined state + local sales tax | ~8.0% | ~9.55% |
Even with a $100,000 higher purchase price, Franklin's low property tax rate means the annual tax bill is $8,465 lower than Naperville's. Add in the income tax gap, and you're looking at roughly $15,600 a year in direct tax savings before housing payments are even netted out. This is the kind of side-by-side Vontari runs automatically — plug in your own offer and home price range at Vontari and it does this math for your actual numbers instead of these illustrative ones.
Once you net out the bigger mortgage payment on Franklin's pricier home (roughly $6,000 a year more in principal and interest), the advantage narrows but doesn't disappear — Franklin still comes out about $9,500 ahead per year on combined tax and housing cash outlay. Sales tax works slightly against Tennessee (9.55% average combined rate versus roughly 8% around Naperville), but on typical household spending that's only a few hundred dollars a year — not enough to flip the outcome.
The Property-Tax-vs-Private-Tuition Trade-Off
There's a second decision hiding inside this one, and it's the exact question Realtor.com's recent breakdown on property taxes versus private tuition was built to answer: is it cheaper to pay up for a house in the top district, or buy a cheaper house nearby and cover private school instead?
Take the Naperville side as an example. A comparable home in an adjacent, average-rated district might run $450,000 instead of $575,000, with property tax closer to $9,000 a year instead of $12,650 — a savings of about $3,650 annually. But if that means enrolling two kids in private school at roughly $16,000 per child per year, that's $32,000 a year, or $416,000 over a 13-year K-12 run (not adjusting for tuition inflation, which would only make private school more expensive over time).
Compare that to the extra property tax for staying in the top public district: $3,650 a year × 13 years = $47,450 total.
In other words, paying the property tax premium for great public schools costs roughly one-ninth of what private tuition for two kids would cost over the same period. This is why, in most metro areas, the "pay more in property tax for the good district" strategy wins decisively once you have more than one kid — the math only gets closer with an only child, and even then rarely flips.
What a "Wellness" Home Premium Adds to the Comparison
One cost line that rarely shows up in relocation spreadsheets: the Global Wellness Institute now projects the wellness real estate market — homes and developments built around walking trails, air and water filtration, community fitness centers, and "longevity" design — will reach $1.8 trillion globally by 2030, up from $876 billion in 2025. Both Naperville and the Nashville suburbs have seen new construction lean into this positioning, and it shows up as a price premium of roughly 5–10% over comparable homes without the branding.
If you're comparing home prices across two metro areas, make sure you're comparing like for like — a "wellness community" listing in Franklin isn't the same product as a standard subdivision resale in Naperville, even if the square footage matches. This is one more reason raw median home price comparisons between cities can mislead: the premium isn't about school quality or commute time, it's about amenities that may or may not matter to you.
The Hidden Cost of Staying Connected to Where You Came From
Relocation math often assumes a clean break, but real life rarely works that way. Meghan Markle and Prince Harry's move to the U.K. came with an early acknowledgment that she'd keep making "regular" trips back to California to see family — a reminder that moving away from a place doesn't eliminate the costs of staying connected to it. If your parents, your business partners, or your kids' activities are still tied to your old city, factor in the flights, the storage unit, or the pied-à-terre you might end up keeping. We modeled a version of this exact problem in Leaving Manhattan for Dobbs Ferry vs. Austin — the cheaper city's tax win can get eaten by second-home carrying costs and travel you didn't originally budget for.
What a No-Income-Tax State Doesn't Protect You From
Tennessee's no-income-tax status is a real financial advantage, but it's not a shield against everything. Bunnie XO's recent public struggles following her divorce from Jelly Roll played out inside their Tennessee home — a reminder that owning real estate in a hot, appreciating no-tax market comes with its own complications when life circumstances change: valuations swing, equity gets split, and a home that felt like an asset can become a liability to untangle. No state tax policy insulates a household from the financial mess of dividing a mortgage, a HELOC, or shared equity. If you're weighing a move partly on tax terms, model what happens to your housing cost structure under a worst-case household scenario too, not just the best case.
Running Your Own Numbers: The Savings Rate Test
NerdWallet defines your savings rate simply: the percentage of your gross income you actually set aside, and it's the cleanest way to see which city really wins for you. Layer the numbers above onto a $150,000 salary with a rough combined federal and FICA burden of $28,500 (constant in both states):
| Naperville, IL | Franklin, TN | |
|---|---|---|
| Gross salary | $150,000 | $150,000 |
| Federal + FICA (est.) | $28,500 | $28,500 |
| State income tax | $7,143 | $0 |
| Housing (mortgage + property tax + insurance) | $49,340 | $47,139 |
| Residual for living costs + savings | $65,017 | $74,361 |
That's a $9,344 annual gap — about $780 a month — in money available for groceries, transportation, discretionary spending, and savings, on the exact same salary. If both households are targeting a 20% savings rate ($30,000 a year), the Naperville household has $35,017 left for everything else; the Franklin household has $44,361. Same paycheck, meaningfully different breathing room.
This is the calculation that matters more than any generic cost-of-living index, because it's built on your actual salary, your actual home price target, and your actual number of kids. This is the kind of personalized breakdown Vontari is built to run — so you don't have to rebuild this spreadsheet by hand every time a new offer lands.
The Bottom Line
A $150,000 offer in Franklin, Tennessee, is worth meaningfully more than the same offer in Naperville, Illinois, once you account for the full stack: zero state income tax, a property tax rate roughly a third of Illinois's, and only a partially offsetting increase in home price and mortgage payment. The gap narrows if you shop for a smaller home, widens if you have multiple kids and the property-tax-versus-private-tuition math kicks in, and can evaporate entirely if you're still flying back to your old city every month for family obligations.
Neither town is objectively "better" — the math above only answers the question for a specific salary, home price, and family size. Change any one input and the winner can flip. Before you sign a relocation agreement or make an offer on a house in either state, run your own numbers — your actual salary, your actual target home price, your actual family size — at Vontari and see exactly where you land.
Sources
- Wellness Real Estate Projected To Hit $1.8 Trillion by 2030 as Developers Tout Life-Extending Homes — Realtor.com News
- What Is a Savings Rate? How to Find Yours and Why It Matters — NerdWallet
- Bunnie XO Reveals Heartbreaking Struggle Inside Her Tennessee Home in Wake of Jelly Roll Divorce — Realtor.com News
- Meghan Markle To Make ‘Regular’ Trips Back to California as She and Prince Harry Settle Into New U.K. Life — Realtor.com News
- Steep Property Taxes vs. Private Tuition: Which Option Costs Homebuyers More? — Realtor.com News