Rate Breakdown

Property taxes in Sioux County are calculated by multiplying the assessed value (minus exemptions) by the total local millage rate.

How Property Tax Works in Sioux County

Property taxes in Sioux County are calculated based on the assessed value of your property and the local mill levy. The assessment process begins with the county director of tax equalization, who determines the "true and full value" of your property, which represents its estimated market value. In North Dakota, property is generally assessed at 50% of this true and full value to determine the taxable value.

The total tax amount is then determined by multiplying the taxable value by the total mill rate. This rate is a composite of levies set by various taxing districts, including the county, school districts, townships, and cities. Because these entities adjust their budgets annually, the mill rate may fluctuate, directly impacting the final tax bill you receive each year.

Available Exemptions

North Dakota provides several property tax relief programs to assist homeowners. Eligibility for these programs is typically income-based or status-based:

• Homestead Tax Credit: Designed for seniors (65 or older) and individuals with permanent disabilities. This credit reduces the taxable value of your primary residence based on your total household income.
• Disabled Veteran Credit: Available to veterans with a service-connected disability of 50% or greater. This credit provides a significant reduction in taxable value, proportional to the disability rating.
• Senior Citizen Exemption: Often bundled with the homestead credit, this provides additional relief to qualified low-income elderly residents.

Residents must apply annually through the county auditor’s office to maintain these exemptions, as they do not automatically renew.

Payment Schedule & Deadlines

Property tax statements are mailed by the county treasurer by December 26th of each year. To manage payments effectively, North Dakota offers the following schedule:

• Full Payment: If paid in full by February 15th, taxpayers receive a 5% discount on the consolidated tax.
• Installment Option: Taxpayers may choose to pay in two installments. The first half is due by March 1st, and the second half is due by October 15th.

Failure to pay by these deadlines results in the accrual of interest. Payments not made by the specified dates are considered delinquent and will be subject to statutory penalty and interest charges, which increase monthly until the balance is satisfied.

Appealing Your Assessment

If you believe your property’s assessed value is inaccurate or inequitable compared to similar properties, you have the right to appeal. The process typically begins at the local Board of Equalization. You must provide documentation—such as recent appraisals, sales data of comparable properties, or photographs of structural issues—to support your claim. Should you remain dissatisfied with the local board's decision, you may further appeal to the County Board of Equalization. It is essential to act promptly, as these boards operate within strict statutory timeframes each spring.