2026 fiscal calendar
Know the tax date before it becomes a penalty date.
Tax bills, payment rules, and valuation-review windows are controlled by the local jurisdiction and the governing state framework. The verified record below separates published figures from dates that require confirmation with Stanislaus County Assessor's Office.
Effective rate
California property tax rates are composed of the 1% constitutional levy plus voter-approved debt and local assessments that vary by tax rate area; no single current effective countywide percentage was published in the official county sources reviewed.
Statement mailing
October 2026; Stanislaus County's property-tax billing calendar states secured property-tax bills are mailed in October.
Payment deadline
For the 2026-27 secured roll, the first installment is due November 1, 2026 and delinquent after 5:00 p.m. December 10, 2026; the second installment is due February 1, 2027 and delinquent after 5:00 p.m. April 10, 2027. If a delinquency date falls on a weekend or holiday, the next business day applies.
Valuation protest
July 2 through November 30, 2026 for regular assessment appeals; supplemental and escape assessments generally within 60 days of notice.
Critical payment warning
Do not assume a grace period.
The verified county 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 the published payment deadline as a hard operational date and retain your receipt or confirmation number.
Read the calendar in order
From assessment to collection
1. Valuation 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.
2. Statement and account review
Match the tax statement to the parcel or account number and confirm exemptions, assessed value, taxing units, credits, and balance.
3. Payment 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.