Woodbury County Courthouse

Auditor's Office

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Map and Directions

620 Douglas Street
Sioux City, IA 51101

Phone: 712-279-6702
Fax: 712-279-6629

Office Hours:
Monday - Friday
8:00am - 4:30pm

Understanding Roll Back Rates Print

What is a Rollback Rate?

  • The Rollback Rate is an annual statewide rate set annually for each property class by the Iowa Department of Revenue.  In effect, the rate of growth in value for a given property class may be limited by the rate of growth in value of another property class.  Somewhat similar to two people tied together in a three-legged race, neither property class can get too far ahead of the other one.

How is Taxable Value calculated?

  • Taxable Value for most property is calculated by multiplying the Rollback Rate for the correct property class by the equalized 100% Actual Value.  Taxable Value for gas & electric utility property is calculated by the Iowa Department of Revenue.