Travis Bunn
Founder, AppealDesk · Published February 28, 2026 · Updated March 17, 2026
The 2026 filing window closed on October 5, 2026. The rule is August 1 or September 1, depending on the county (Philadelphia: first Monday of October), so the next deadline is October 4, 2027. Use the time before it opens to build the evidence.
Check your property now, $49 flat fee →Knowing your deadline is half of it. The other half is whether the county’s number is actually too high, because a deadline you meet with no case is just paperwork. Checking your number is free and takes about a minute.
Free to check. No account needed.
Start your Pennsylvania appeal: Philadelphia County · Delaware County · Montgomery County · Allegheny County
Updated October 2026
Most Pennsylvania counties require property tax appeals by August 1, 2026, though Philadelphia and Allegheny County have different deadlines. Always verify with your county assessment office.
The majority of PA counties follow August 1:
PA uses CLR to ensure fairness:
2026 CLR Examples:
Knowing the date is the easy part. The date only matters if the county's number is actually too high, and nobody checks that number for you.
The number your appeal would challenge, pulled free in seconds. No account needed.
Minimum filing requirements:
Evidence can follow: Most counties allow evidence submission after initial filing.
Example - Chester County:
All because you filed August 2 instead of August 1.
Counties in reassessment are prime for appeals:
Why it matters: New assessments = more errors = higher success rates.
A real AppealDesk order, Chester County
In July 2026, a homeowner in Chester County ran the check. The county had their home on record at $1,421,812, while recorded sales of comparable homes supported about $1,052,466: an over-assessment of $369,346, worth roughly $3,516 per year if corrected. Their packet laid out the comparable sales, the forms, and the filing steps. Nobody at the county was ever going to run that check for them.
A deadline you meet with no evidence behind it is just paperwork. Comparable sales are what boards actually respond to, and pulling your county's number is where that starts.
Enter your address to pull your county record free. If it looks too high, your $49 packet gives you the comparable sales, forms, and filing steps.
By June 15:
By July 15:
By July 25:
By July 30:
Counties with e-filing:
Benefits of e-filing:
If paper filing:
Pennsylvania's county-by-county variations make appeals complex. Each Board has preferences.
AppealDesk handles Pennsylvania appeals with:
Pennsylvania may seem to give you more time than other states, but don't be fooled. August creeps up fast.
Your assessment is set. Your deadline is firm. No extensions for vacation, forgetfulness, or "I meant to file."
With PA's high property values, even small percentage reductions mean significant savings.
154 days until August 1. Start now, file early, save money.