Last year, the average American single-family home lost 1.7% of its value. The average property tax bill on that same home went up 3%.
Your house was worth less. You were billed more.
That isn't a glitch, and it isn't a rounding error. It happens because the number on your bill was never calculated from what your house is worth. It starts with the town's budget, and your house is just one slice of a total somebody else already decided.
The math, run forward:
The town sets a budget (the levy), adds up the assessed value of every taxable property (the base), and divides one by the other. The tax rate is an output, not an input. When values fall, the base shrinks, the levy doesn't, and the rate has no choice but to rise. The average effective rate hit 0.90% in 2025, the highest since 2020.
From 2018 to 2025, the average bill rose from $3,498 to $4,427, and the rate fell in most of those years. The bill rose in every one of them.
Corrected for inflation, that 2018 bill would be $4,487.69 today. So in real dollars, the national average hasn't exploded. The average is hiding the story: the effective rate is 1.84% in Illinois and 0.33% in Hawaii, and the average bill is $10,499 in New Jersey versus $1,081 in West Virginia.
The gap that costs you the most is the one between your house and the one next door. Assessment caps like California's Proposition 13 and Florida's Save Our Homes shield long-time owners, and a sale resets the clock. In Miami, a median-priced home bought in 2023 would owe $9,205 a year, close to three times what a neighbor in a comparable home, owned for twelve years, pays.
None of this is hidden. It's published every year, in the industry's own annual report, and almost nobody adds it up. There's even a company built on it: Ownwell, which appeals your assessment for a cut of what it saves you, raised $50 million in 2026.
The full video walks through the levy and the base, why seven years of falling rates still produced seven years of rising bills, and who ends up carrying the difference.
No advice here — no tips, no recommendations. Just the numbers, and where each one is published. Full source list is in the video description.
— The Cost of Living
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