Fiscal year
The Black Hawk County Treasurer’s office operates on a fiscal year beginning July 1 and ending June 30.

Calendar

• July: Beginning of fiscal year
• August: New fiscal year property taxes are certified
  
  • Property tax and special assessment statements mailed 
• September: First half property tax and special assessments due September 1, delinquent after September 30. However, if the last day of September is a Saturday or Sunday, the amount due becomes delinquent the 2nd business day of October (445.37; 435.24; 384.65).
• October: First half property tax and special assessments delinquent as of October 1. Interest accrues at the rate of 1.5% per month, rounded to nearest dollar (445.39; 435.24; 384.65).
• November: Delinquent letters mailed to property owners for which the previous September and prior taxes are unpaid (445.36).
  
  • “For properties with an outstanding tax sale lien, Iowa law provides that taxes for a subsequent year may be paid by the purchaser at tax sale beginning 1 month and 14 days following the date from which an installment becomes delinquent (446.32)."
• December: N/A
• January: Senior Citizen/Disabled property tax credit forms become available. Qualified individuals may apply between January 1 and June 1 with the County Treasurer (435.22; 425.20).
• February: N/A
• March: Second half property tax due March 1, delinquent after March 31. However, if the last day of March is a Saturday or Sunday, the amount due becomes delinquent the 2nd business day of April (445.37; 435.24; 384.65).
• April: Second half property tax delinquent as of April 1. Interest accrues at the rate of 1.5% per month, rounded to nearest dollar (445.39; 435.24; 384.65).
  
  • Delinquent tax statements and notice of tax sale mailed to property owners (435.25; 446.9).
• May: “For properties with an outstanding tax sale lien, Iowa law provides that taxes for a subsequent year may be paid by the purchaser at tax sale beginning one month and fourteen days following the date from which an installment becomes delinquent (446.32).”
• June: Senior Citizen/Disabled property tax credit forms due by June 1 (435.22; 425.20).
  
  • Annual Tax Sale, 3rd Monday of June (446.7; 446.15)