St. Tammany Parish, Louisiana 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 St. Tammany Parish Assessor's Office.
Rate context
ConfirmNot published in the reviewed official sources.
Statement mailing
PublishedNovember 2026; the official assessor FAQ states tax bills are mailed in November.
Payment deadline
PublishedDecember 31, 2026; Louisiana parish property taxes are due and payable by December 31, 2026 and become delinquent January 1, 2027, with applicable interest and penalties thereafter.
Valuation protest
Published2026 assessment review deadline August 31, 2026; Parish Board of Review appeal deadline September 14, 2026 at 4:30 p.m.
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.