Johnson County property owners are reminded that the second installment of property and mobile home taxes is due March 1, 2026. Payments need to be delivered to the Treasurer’s Office, paid online or postmarked by Tuesday, March 31, 2026, to avoid a 1 ? percent monthly penalty that will begin on Wednesday, April 1, 2026.

In-person payments must be made at the Treasurer’s Office, located at the Johnson County Administration Building at 913 S. Dubuque St. in Iowa City. Hours are Monday through Friday, 8 a.m. to 5 p.m.

If paying by mail, the stub portion of the tax statement must accompany the payment. If paying by mail, return payment to the Johnson County Treasurer, PO Box 2420, Iowa City, IA 52244-2420. Payments postmarked by March 31, 2026, will be considered paid on time and no interest will be charged. The U.S. Postal Service postmark is the only date recognized for mailing.     The date written on a check or a business metered date cannot be accepted as proof of the mailing date. Residents who would like a receipt must include a self-addressed stamped envelope with their payment.

To make an online payment, visit www.IowaTaxAndTags.org. Iowa Tax and Tags now has customer accounts to manage property tax, receive reminders about upcoming bills and schedule future payments. Contact the Treasurer’s Office at 319-356-6087 if you have questions about Iowa Tax and Tags customer accounts.

Questions about payments should be directed to the Treasurer’s Office at 319-356-6087 or [email protected]. Additional information about property taxes is available at www.johnsoncountyiowa.gov.