Pennsylvania Property Tax Appeal Guide (2026)
By Saiid Zamani · Realtor®, Keller Williams Realty Devon-Wayne
Philadelphia suburbs market expert · AI educator · 1,000+ agents trained
Pennsylvania property tax assessments can be appealed annually. Successful appeals reduce your assessed value, which reduces both your county and school district tax bill for years.
How PA property taxes work
Your annual tax bill equals your county-assessed value × the combined millage rate (county + municipality + school district). The assessment is set by the County Board of Assessment; the millage rate is set by each taxing body.
When to appeal
Appeal annually if your home's market value is materially lower than your county-implied market value (assessed value ÷ Common Level Ratio). Recent purchases below the implied value are the strongest single piece of evidence.
Deadlines (typical)
Montgomery County: appeals due by September 1 for the following tax year. Chester County: appeals due by August 1. Delaware County: appeals due by September 1. Verify current deadlines with each county Board of Assessment.
Evidence that helps
Recent sale of the subject property below assessed value (strongest), Bright MLS comparable sales within the same neighborhood and time window, photos of property defects (older systems, deferred maintenance), and a private appraisal if available.
Should you use an attorney
For appeals expected to save $3,000+ per year, a property tax appeal attorney is often worth the contingency fee (typically 30–50% of first-year savings). For smaller appeals, owners can self-represent.
Frequently Asked Questions
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