Property Tax by State 2026: Why a $430K Home Costs $9,589/Year in New Jersey but Only $2,064 in Tennessee — and How a $770 Car Payment Cuts Your Buying Power by $135K

You just qualified for a $430K home. Your tax bill will decide whether that's true.

Mortgage rates dipped to 6.43% this week, and the headlines are calling it a buying opportunity. Realtor.com's mortgage calculator shows what that means in raw numbers: on a $430,000 home with 20% down, you're financing $344,000, and your principal-and-interest payment lands around $2,159 a month.

That's the number the lender shows you. It is not the number that determines whether you can actually afford the house. Property tax is the line item that quietly rewrites your budget after closing — and depending on which state that $430K home sits in, it adds anywhere from $172 to $799 a month on top of your mortgage payment. Same house, same price, radically different monthly obligation.

I went through this exact math when I bought, and I underestimated it badly. My assessment came in high relative to what comparable homes had actually sold for, and I was paying for it every month until I built a case and appealed. This post walks through the state-by-state math, the nominal-vs-effective rate distinction that trips most buyers up, and the exact appeal process that got me $2,800 a year back.

The $430K home, six states, six different bills

Here's what property tax actually costs on a $430,000 home once you apply each state's effective tax rate — the rate calculated against market value, not the nominal mill rate applied to assessed value.

State	Effective Rate	Annual Property Tax	Monthly Add-On
New Jersey	2.23%	$9,589	$799
Illinois	2.07%	$8,901	$742
Texas	1.68%	$7,224	$602
California (Prop 13)	0.75%	$3,225	$269
Florida (with homestead)	0.86%	$3,698	$308
Tennessee	0.48%	$2,064	$172

The gap between the top and bottom of that table is $7,525 a year — more than what most families spend on groceries. If you're comparing housing markets, that gap deserves at least as much attention as the sticker price of the house. I've broken down what drives New Jersey's number specifically in New Jersey Property Tax Millage Breakdown 2026, and the same $430K comparison against Tennessee gets a deeper treatment in Property Tax on a $430K Home in 2026.

This is the kind of side-by-side analysis Tavirex runs automatically — you plug in a home price and it builds the comparison table for you instead of you cross-referencing six county assessor sites.

Why "nominal rate" and "effective rate" aren't the same number

Assessors don't tax your home's full market value directly — they tax its assessed value, which is usually some percentage of market value, then apply a "mill rate" (tax per $1,000 of assessed value) to that number. This is where a lot of confusion creeps in, and it's exactly why two homes worth the same in the real world can have wildly different tax bills.

Here's a worked example using that New Jersey figure above:

• Market value: $430,000
• Assessment ratio in this municipality: 88.4% (assessed value = $380,000)
• Nominal mill rate: 2.523% (applied to assessed value)
• Tax bill: $380,000 × 0.02523 = $9,587
• Effective rate (tax ÷ market value): $9,587 ÷ $430,000 = 2.23%

Notice the nominal rate (2.523%) and the effective rate (2.23%) are different numbers describing the same bill. When you're comparing towns, counties, or states, always convert to effective rate — it's the only apples-to-apples measure. A town with a "low" 1.9% nominal rate but a 100% assessment ratio can cost you more than a town with a "high" 2.5% nominal rate and an 80% assessment ratio.

The car payment is quietly doing the same thing to your budget

Realtor.com reported that the average new-car payment hit an all-time high of $770 a month in 2026 — and that a payment at that level can cut a buyer's home-purchase budget by as much as $135,000. That's not a coincidence worth ignoring next to the property tax numbers above.

Look at what's happening in New Jersey specifically: the property tax add-on on a $430K home is $799 a month — almost identical to the average car payment. A buyer carrying both is effectively making two car payments before their mortgage principal even starts building equity. In Tennessee, the property tax add-on is $172 — leaving roughly $600 a month of breathing room that a New Jersey buyer with the same income simply doesn't have.

Run the math on qualifying income: lenders typically cap total housing-plus-debt obligations around 43-45% of gross monthly income (DTI). If your $770 car payment and $799 NJ property tax escrow are both baked into that ratio, you're financing a meaningfully smaller loan than a Tennessee buyer with the identical car payment and income. That's how property tax and car debt compound into home-buying power loss — the car payment article and the property tax numbers are describing the same squeeze from two different angles.

The worked appeal calculation: what a $50K correction is actually worth

Now the part that's actionable. Say your assessor has your $430,000 home assessed as if it were worth $480,000 — a $50,000 over-assessment, which is common after a blanket reassessment or when the assessor's comparable sales are stale. At New Jersey's 2.23% effective rate:

• Over-assessment: $50,000
• Annual overpayment: $50,000 × 2.23% = $1,115/year
• Monthly overpayment: $93

That's real money leaking out of your budget every single month for no reason other than a data error. Now model what fixing it is worth over a realistic ownership horizon — say seven years, using a 4% discount rate to account for the time value of money:

• Annuity factor for 7 years at 4% = (1 − 1.04⁻⁷) ÷ 0.04 ≈ 6.00
• NPV of the appeal: $1,115 × 6.00 ≈ $6,690

A successful appeal on a $50,000 assessment error is worth nearly $6,700 in present-value terms over a typical hold period — for filling out paperwork and pulling a handful of comparable sales. Scale that up: if your over-assessment is closer to $75,000, you're looking at savings north of $1,670/year and roughly $10,000 in NPV over the same window. You can model this for your specific assessment, home value, and hold period at Tavirex rather than building the spreadsheet by hand.

How to actually build the case

The skill here is the same one assessors and appraisers use — you're just pointing it at your own house instead of an entire district.

1. Pull your assessment record. Every county publishes assessed value, and most publish the assessment ratio used to convert it to market value. If your assessed value divided by that ratio is meaningfully higher than what similar homes are selling for, you have a case.
2. Find 3-5 comparable sales. Same neighborhood, sold within the last 6-12 months, similar square footage (within 15%), similar lot size, similar age/condition. Public sale records or your county's GIS portal usually have this.
3. Adjust for differences. If a comp has an extra bathroom or a finished basement yours doesn't, note the adjustment — this is exactly what appraisers do, just in reverse.
4. Check the appeal deadline. These vary sharply by state: New Jersey's deadline is typically April 1 (or May 1 in reassessment years), Texas protest deadlines usually fall around May 15 or 30 days after your notice, and Florida's Value Adjustment Board window opens after your TRIM notice arrives in August. Missing the window means waiting a full year. If you're in Texas specifically, the comparable sales approach and DCAD/HCAD-specific process is covered in Texas Property Tax Over-Assessment 2026.
5. File and present. Bring your comps, your adjustments, and photos if condition is a factor. Boards generally respond better to a clean three-page packet than a verbal complaint.

The bigger picture: exemptions and the Florida deadline

None of this is about paying less than you owe — it's about paying an accurate amount. That principle matters more given where policy is heading. ITEP's recent commentary on tax code fairness makes the case that after 250 years, the system should reflect accuracy and equity rather than opacity, and property tax assessment is one of the clearest places homeowners can act on that themselves.

There's also a live deadline worth knowing if you're weighing a move: DeSantis's proposal would offer property tax relief tied to purchases made before January 1, meaning the timing of a Florida purchase could materially change your first-year bill. I covered the mechanics of that deadline in Florida Property Tax Deadline: How Buying Before January 1 Saves $2,340/Year. If you're already leaning toward Florida for the lower effective rate shown in the table above, that deadline is one more reason to move the closing date up rather than push it back.

And don't skip exemptions — homestead, senior, veteran, and disability exemptions go unclaimed constantly, simply because homeowners don't know they qualify. If you inherited a home or recently turned 65, check Texas, Ohio, and Utah Property Tax Exemptions 2026 for how much those credits are actually worth.

Run your own numbers before you sign

The mortgage calculator tells you what the bank will lend you. It doesn't tell you what the county will bill you, and it definitely doesn't account for whether your specific assessment is accurate. Before you commit to a state, a county, or a specific house, build the full picture — effective rate, assessment ratio, and whether the existing assessment holds up against actual comparable sales. You can run that exact analysis for your address and target price at Tavirex.

Sources

• The Average New-Car Payment Is Shrinking Homebuyers’ Budgets by $135,000 — Realtor.com News
• Mortgage Calculator: Here’s How Much You Need To Buy a $430K Home at a 6.43% Rate — Realtor.com News
• America at 250: It’s Time for a Tax Code That Lives Up to Our Ideals — Institute on Taxation and Economic Policy
• Key New Year’s Tax Deadline May Loom for Florida—Will It Sway More Out-of-State Buyers? — Realtor.com News
• Will the ROAD Act change what pencils for multifamily rentals? — HousingWire