Versions of Iowa Code 554.12506 - Rate of interest on LawServer 2023 Iowa Code 554.12506 – Rate of interest 2022 Iowa Code 554.12506 – Rate of interest 2020 Iowa Code 554.12506 – Rate of interest 2018 Iowa Code 554.12506 – Rate of interest 2016 Iowa Code 554.12506 – Rate of interest 2014 Iowa Code 554.12506 – Rate of interest. 2009 Iowa Code 554.12506 – Rate of interest