U.S. Property Tax Appeal Coverage & Deadline Data
A self-published snapshot of what HomeTaxAppeal covers and how U.S. property tax appeal deadlines are structured, as of May 23, 2026. Every number below is reproducible from our public dataset.
Coverage
HomeTaxAppeal publishes protest guidance for the 50 U.S. states and the District of Columbia — 51 jurisdictions in total — spanning 3,138 county records. Of those, 2,611 counties (83.2%) have a direct online appeal-filing portal link on file.
| States + DC covered | 51 |
|---|---|
| County records | 3,138 |
| Counties with an online filing portal | 2,611 |
| Portal availability | 83.2% |
Counted from the state and county records in our published dataset as of May 23, 2026. "Portal availability" is the share of county records that carry a non-null online-filing-portal URL. These figures are compiled from public county assessor records and state statutes. They are descriptive reference counts — not property valuations, savings estimates, or protest-outcome predictions.
Filing deadlines across the U.S.
Property tax appeal deadlines are not uniform. Across the 51 jurisdictions, 21 (41.2%) set a single fixed statewide filing deadline by statute, while the remaining 30 use a rolling window measured from each notice-mailing date, a board-session window, or a prior-year rule. Separately, 27 jurisdictions (52.9%) carry a concrete representative 2026 filing date on file — a statutorily rolling state like Texas can carry a representative date (the later of May 15 or 30 days after the appraisal notice) without having a fixed deadline. These 2026 filing dates span the entire calendar — from January 15, 2026 to December 31, 2026.
Statutory deadline structure (51 jurisdictions)
| Fixed statewide date | 21 |
|---|---|
| Rolling (from notice) | 18 |
| Board-session window | 11 |
| Prior-year rule | 1 |
Representative 2026 filing dates by month (27 jurisdictions with a concrete date on file)
| Month | Jurisdictions |
|---|---|
| January | 2 |
| February | 3 |
| March | 3 |
| April | 4 |
| May | 3 |
| June | 4 |
| July | 2 |
| August | 3 |
| September | 2 |
| December | 1 |
On top of the statewide rule, 708 counties carry a county-specific deadline override (703 of them with a concrete 2026 date).
Derived from the current state records (statutory deadline type and 2026 primary date) and county deadline-override records as of May 23, 2026 — not from the site's derived deadlines.json artifact, which predates the 2026 fixed-date backfill. "Fixed" counts jurisdictions whose statutory deadline type is fixed; the representative-date figures separately count jurisdictions whose primary record carries a concrete 2026 calendar date (a jurisdiction can have either without the other); the month table tallies those concrete dates by calendar month. These figures are compiled from public county assessor records and state statutes. They are descriptive reference counts — not property valuations, savings estimates, or protest-outcome predictions.
Statistics we hold back until they clear review
One county-level figure — the share of protests that settle informally before a formal hearing (the "informal resolution rate") — is published only under a standing methodology guardrail: a county's number appears only when it is tied to a dated public source, is recently verified, is not flagged as modeled or borrowed, and has a known sample size. Today, 0 counties in the dataset carry a guardrail-eligible value, so no site-wide informal-resolution figure is published on this page.
This mirrors, verbatim, the per-county suppression gate used on county pages (methodology verdict of May 25, 2026). We publish no property-tax savings, reduction-percentage, or valuation statistic anywhere on this page, and emit no self-rating schema — those figures stay excluded pending separate methodology review.
How these numbers are derived
Every figure on this page is computed directly from our published state and county dataset — no third-party or proprietary data feeds are involved. These figures are compiled from public county assessor records and state statutes. They are descriptive reference counts — not property valuations, savings estimates, or protest-outcome predictions. The underlying records were last verified May 23, 2026; this page was last reviewed on the date shown below.
HomeTaxAppeal is a self-service software product, not a tax consulting or representation service; nothing on this page is tax, legal, or financial advice.