Cass County, North Dakota 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 Cass County Tax Equalization Office.
Rate context
Confirmcounty, city, township, school, park, and other taxing-district mill levies vary; no single countywide effective 2026 rate was published.
Statement mailing
PublishedFirst week of December 2026; Cass County states tax statements are mailed during the first week of December to owners of record as of November 1.
Payment deadline
Published2026 calendar-year payment schedule for 2025 real-estate taxes: due January 1, 2026; 5% discount if paid in full by February 15, 2026; first installment and special assessments due March 1, 2026; second installment due October 15, 2026; statutory penalties apply after the installment dates under N.D.C.C. §57-20-01.
Valuation protest
PublishedCass County published 2026 local Board of Equalization meeting notices for April; county equalization follows in the first 10 days of June and State Board review is August 11, 2026. The reviewed Cass County sources did not publish one countywide formal closing date for valuation protests.
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.