The most common court fees are listed on the Iowa Judicial Branch website at: https://www.iowacourts.gov/for-the-public/representing-yourself/civil-court-fees/.
If you believe you cannot afford the filing fee, you can file an application and affidavit to defer payment of costs. Go to the Iowa Judicial Branch website at: https://www.iowacourts.gov/for-the-public/representing-yourself/iowa-interactive-court-forms/, and scroll down to the “Fee Waiver Interview” for access to an interactive interview to prepare the form.