Delaware County, Pennsylvania property-tax payment and appeal deadlines
Tax bills, payment rules, and valuation-review windows are controlled by the local jurisdiction and the governing state framework. The reviewed record below separates published figures from items that still require confirmation with Delaware County Board of Assessment.
Rate context
Confirmcounty, municipal, and school district rates vary; the county's 2026 tax-deferral program and tax-rate materials are district-specific.
Statement mailing
PublishedFebruary 1, 2026; official county materials state the county bill is mailed February 1.
Payment deadline
Published2026 county real estate taxes: 2% discount February 1 through April 1; face amount April 2 through June 1; 10% penalty after June 2. Local municipal and school bills may differ.
Valuation protest
PublishedAugust 1, 2026 for annual appeals for the following tax year; interim appeals are due within 40 days of the assessment-change notice; exemption appeals use the applicable preceding-year deadline.
Do not assume a grace period.
The reviewed record identifies the payment timing above but does not establish a universal penalty schedule for this page. Late charges, interest, collection costs, tax-sale procedures, and lien or foreclosure timelines can depend on state law and the local collector’s process. If the deadline is close or a balance is delinquent, contact the tax collector directly and request the current payoff amount in writing.
Treat a published payment deadline as a hard operational date and retain your receipt or confirmation number.
From assessment to collection
01Valuation and notice
Review the assessment notice as soon as it arrives. The protest window may run from the notice date rather than from the payment due date.
02Statement and account review
Match the tax statement to the parcel or account number and confirm exemptions, assessed value, taxing units, credits, and balance.
03Payment confirmation
Use the official collector channel, then save the receipt, transaction reference, and date posted. A bank submission is not always the same as a county posting date.