Montgomery County, Pennsylvania · Norristown
Montgomery County property tax appeal guide
Philadelphia's largest suburban county, taxed off a 1996 base year. File your annual appeal with the Board of Assessment Appeals by August 1, a full month before Pennsylvania's September 1 default. You appeal through the Montgomery County Board of Assessment Appeals; Pennsylvania uses Your county's annual appeal application (Pennsylvania has no statewide form) filed with the County Board of Assessment Appeals.
Montgomery County appeal deadline
6 days leftAugust 1, 2026
Montgomery County's deadline is August 1, a month earlier than Pennsylvania's September 1 default. The county warns that delayed USPS postmarks have been causing timely-mailed filings to be marked late, so hand-deliver or use a trackable service.
Under the Consolidated County Assessment Law, the annual appeal deadline is September 1 (53 Pa.C.S. §8844(c)(1)), but a county may set an earlier date, no sooner than August 1 (§8844(c)(3)), and two of Pennsylvania's biggest appeal markets have done exactly that. Montgomery County's deadline is August 1 and Bucks County's is August 3, 2026, both roughly a month before the statewide default. Allegheny County is September 1 (it moved from March 31 effective tax year 2026, so older guides are stale). Philadelphia runs under a separate law, with an October 5, 2026 deadline. Confirm your date with your county before relying on it, because the statewide September 1 figure quoted by most guides is simply wrong for Montgomery and Bucks.
How to appeal in Montgomery County
1. Find your assessment and your county's common level ratio
Your assessment is a base-year number, not today's market value. Divide it by your county's current STEB common level ratio to get the market value the county is implicitly asserting. If that number is higher than your home is actually worth, you have an appeal.
2. File your county's appeal application by the deadline
File with your County Board of Assessment Appeals on or before September 1 (53 Pa.C.S. §8844(c)(1)). A county may set an earlier date, no sooner than August 1. Allegheny is September 1; Philadelphia is the first Monday in October under its own separate law.
3. Build your evidence
Two arguments work in Pennsylvania. Overvaluation: recent arm's-length sales of similar homes show your implied market value is too high. Uniformity: under the Pennsylvania Constitution (art. VIII, §1), comparable assessment-to-value ratios show you are assessed higher than similar properties. The Supreme Court's Downingtown decision (590 Pa. 459 (2006)) is the leading case on proving non-uniformity with ratio evidence.
4. Board of Assessment Appeals hearing
The board hears your case and issues a decision. Where the county's predetermined ratio varies from the common level ratio by more than 15%, the board applies the CLR to market value (53 Pa.C.S. §8844(e)(2)).
5. Court of Common Pleas (optional)
If you disagree with the board, you generally have 30 days to appeal to the Court of Common Pleas, which hears the matter de novo (53 Pa.C.S. §8854).
Montgomery County property tax FAQ
What is the property tax appeal deadline in Montgomery County, Pennsylvania?
August 1, 2026. Montgomery County's deadline is August 1, a month earlier than Pennsylvania's September 1 default. The county warns that delayed USPS postmarks have been causing timely-mailed filings to be marked late, so hand-deliver or use a trackable service. Under the Consolidated County Assessment Law, the annual appeal deadline is September 1 (53 Pa.C.S. §8844(c)(1)), but a county may set an earlier date, no sooner than August 1 (§8844(c)(3)), and two of Pennsylvania's biggest appeal markets have done exactly that. Montgomery County's deadline is August 1 and Bucks County's is August 3, 2026, both roughly a month before the statewide default. Allegheny County is September 1 (it moved from March 31 effective tax year 2026, so older guides are stale). Philadelphia runs under a separate law, with an October 5, 2026 deadline. Confirm your date with your county before relying on it, because the statewide September 1 figure quoted by most guides is simply wrong for Montgomery and Bucks.
What form do I use to appeal in Montgomery County?
Pennsylvania uses Your county's annual appeal application (Pennsylvania has no statewide form), filed with the County Board of Assessment Appeals. Filing fees vary by county, some charge nothing, confirm with your County Board of Assessment Appeals.
What is the property tax appeal deadline in Pennsylvania?
September 1 in most counties (53 Pa.C.S. §8844(c)(1)), but do not assume it applies to you. A county may set an earlier date, no sooner than August 1, and the two largest Philadelphia-area suburban counties have: Montgomery County is August 1 and Bucks County is August 3, 2026. Allegheny County is September 1, having moved from March 31 effective tax year 2026. Philadelphia is October 5, 2026, the first Monday in October, under a separate law. Confirm with your county board before you rely on any date.
Other Pennsylvania counties
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