The Only Home Cost That Rises When Your Value Falls

Property tax is the only carrying cost on your house that can rise while the house is worth less. That is exactly what happened at national scale in 2025.

The average single-family bill hit $4,427 in tax year 2025, up 3% from 2024, according to ATTOM in its report released April 9, 2026. Over the same year, the average estimated value behind those bills fell 1.7% to $494,231. Values down, bills up.

Why the two move on different clocks

The effective tax rate rose to 0.9% in 2025 from 0.86% in 2024, the highest since 2020. That gap opens because your assessment lags the market and the levy is set by a local budget that does not shrink when your valuation does. In total, $396.8 billion was levied on more than 89.6 million single-family homes in 2025, up 3.7% year over year.

Treat ATTOM's $494,231 as an average dragged up by expensive coastal homes, not a typical house. Our data across roughly 26,000 ZIP markets puts the typical US home nearer $291,471 as of June 2026. The direction still holds for the ordinary owner: the tax line is sticky upward even when equity is flat or falling. See the full US housing market report for the value side of that ledger.

Buyers underwrite your tax line, not your list price

A buyer does not qualify on your asking price. They qualify on the monthly payment, and property tax rides inside that payment through escrow. A high bill quietly shrinks the pool of people who can bid.

Run the arithmetic in a high-tax state. The Northeast posted the highest average bills in 2025, led by New Jersey at $10,499, Connecticut at $8,901, New Hampshire at $8,174, Massachusetts at $7,904 and New York at $7,732. A $10,499 New Jersey bill is about $875 a month before a dollar of principal, interest, or insurance. At current rates, $875 a month covers the debt service on well over $130,000 in additional mortgage.

So a New Jersey home and an identical Alabama home at the same list price hand buyers very different monthly numbers, because Alabama's average bill was $1,284. In high-tax jurisdictions your real competition is not the house down the street. It is the rate environment plus a fixed tax surcharge that prices some buyers out before they open your listing. When the bill rises and rates stay elevated, the qualified pool thins from the bottom up. If you are setting a number, our pricing guides start from the payment, not the sticker.

Where the burden concentrates

Location does most of the work. The highest effective rates in 2025 were Illinois at 1.84%, New Jersey at 1.58%, Vermont at 1.40%, Connecticut at 1.36% and Ohio at 1.32%. At the metro level the concentration sharpens: the 25 metros with the highest effective rates sat almost entirely in the Northeast or Midwest, led by Binghamton, New York at 2.27% and Champaign, Illinois.

The other end is real. The lowest effective rates in 2025 were Hawaii at 0.33%, Idaho at 0.39%, Wyoming at 0.4%, Arizona at 0.43% and Alabama at 0.43%. If you own in one of these states, the tax line is not your reason to sell now. Check where your state lands in the state-by-state rankings before you weigh it.

What to do with this

Do not read a soft price market as a break on holding costs. In 2025 the two pulled in opposite directions, and effective rates reached a five-year high. If you own in a high-rate state like Illinois or New Jersey and you are on the fence, waiting is not free. Each reassessment cycle or levy hike adds to a fixed cost and trims the buyer pool that can afford your monthly number.

Be clear on the limit of this. Taxes alone should not trigger a sale, and easing rates could widen the pool again. But if your plan was to let the market come back, the tax side of the ledger is not waiting with you. Price the bill into your timing the way a buyer's lender already does, and pull your assessment notice before you pull comps.