DES MOINES, IOWA (October 17, 2019) — The Iowa Department of Revenue (IDR) has finalized the 2020 interest rate, individual income-tax brackets, and individual income-tax standard-deduction amounts for the 2020 tax-year (applicable for taxes due in 2021).
Interest Rates
Starting January 1, 2020, the interest rate for tax-payers with overdue payments will be: