How to Modify Child Custody in Iowa
Reviewed by DocDraft Legal Team · Iowa · Last updated October 7, 2026
The 150 mile figure in Iowa Code 598.21D is measured from an address your child may have left years ago, not from where the child lives today. Modifying child custody in Iowa means asking the Iowa District Court that entered your existing custody or visitation order to change it because something significant has changed since that order was made. Iowa Code chapter 598 holds no waiting period: nothing in it bars, delays or paper screens a modification application, and the single waiting period the chapter does contain, the ninety days in section 598.19, sits before a dissolution decree may be granted at all. Relocation is where Iowa parts company with most states. Chapter 598 imposes no advance notice period, no consent requirement and no pre move court filing. Section 598.21D instead provides that where a parent holding joint legal custody and physical care, or sole legal custody, moves the child 150 miles or more from the child's residence at the time custody was awarded, the court may consider that relocation a substantial change in circumstances. The finding is discretionary. The remedy is not: once the court makes it, the court shall modify the order to at a minimum preserve, as nearly as possible, the existing relationship between the child and the nonrelocating parent. One step is mandatory for everyone. Under section 598.15 both parties must finish a court approved parenting course within 45 days of service of the modification application, and no final order may be entered until they have. The filing fee is $130, and Iowa prescribes no statewide custody modification form. Attorney review of your filing is available through DocDraft.
Find out where you stand in Iowa
What is prompting the change to your custody order?
DocDraft provides document preparation, not legal advice.
How do I modify a child custody order in Iowa?
File an application to modify in the Iowa District Court, with venue under Iowa Code 598.2 in the county where either party resides. Identify the decree, state the substantial change since it was entered, have the other party served, and complete the parenting course Iowa Code 598.15 requires. The fee is $130.
Is there a waiting period to modify custody in Iowa?
No. Iowa Code chapter 598 contains no waiting period, no time bar, no affidavit requirement and no adequate cause gate before a parent may apply to modify custody or visitation. The ninety day period in section 598.19 runs before a dissolution decree may be granted, so it has no bearing on a later modification.
How much notice must an Iowa parent give before moving with a child?
Iowa Code chapter 598 sets no advance notice period, no consent requirement and no pre move filing step. What constrains a parent before a move is any geographic restriction or notice term a judge wrote into the decree itself. A move of 150 miles or more can support a modification afterward under section 598.21D.
What does Iowa measure its 150 mile relocation figure from?
Iowa Code 598.21D measures 150 miles from the residence of the minor child at the time that custody was awarded, not from wherever the child lives now. A parent who has already moved the child once keeps counting from that original address, so the distance left before the trigger is cumulative.
Iowa custody modification at a glance
Changing child custody in Iowa means asking the Iowa District Court that entered your existing custody or visitation order to change it because something significant has changed since that order was made. Iowa Code chapter 598 then does two unusual things at once. It sets no waiting period, no screening affidavit and no adequate cause gate, so timing is never the obstacle and the whole case rests on what changed. And it reaches relocation only after the fact. There is no notice duty and no permission step, but section 598.21D lets the court treat a 150 mile move by the parent with physical care or sole legal custody, counted from the child's residence when custody was awarded, as a substantial change in circumstances. Iowa prescribes mandatory statewide forms for nine family actions and none of them is a custody modification.
Which Iowa parent is moving changes the answer
Which parent is doing the moving matters more in Iowa than how far they go. Say a Polk County decree gave you and the other parent joint legal custody and gave the other parent physical care, and you are now offered work 200 miles away. Section 598.21D is written for a relocating parent who holds joint legal custody and physical care, or sole legal custody, so it does not reach your move at all. Flip the facts and the picture changes. If the physical care parent moves 160 miles from the address the child lived at when custody was awarded, the court may call that a substantial change, and having called it one it must modify the order to at a minimum preserve your relationship. Attorney review is available through DocDraft.
Relevant Laws
Iowa Code 598.21D (relocation as grounds to modify custody)
Provides that where a parent awarded joint legal custody and physical care, or sole legal custody, relocates the child 150 miles or more from the child's residence at the time custody was awarded, the court may consider the relocation a substantial change in circumstances, and must then modify to at a minimum preserve the existing relationship with the nonrelocating parent. Also authorizes a cash bond on a finding of past interference.
Iowa Code 598.41 (custody of children, and the best interest factors)
Sets the maximum continuing contact policy, the rebuttable presumption against joint custody where a history of domestic abuse exists, and the eleven best interest factors at subsection 3, including the child's wishes weighed by age and maturity at paragraph f. Subsection 8 lets the court require mediation on a modification application.
Iowa Code 598.15 (mandatory course for parties to custody proceedings)
Requires the parties to any action involving child custody or visitation to participate in a court approved course within 45 days of service of the notice and application for modification, makes each party arrange and pay for their own, and bars entry of a final order until the section is complied with or waived for good cause.
Iowa Court Rules chapter 17 (forms for self representation)
Rule 17.1 makes the chapter's forms mandatory for self represented litigants in the actions the chapter covers. The chapter prescribes forms for domestic abuse, elder abuse, sexual abuse, name change, support suspension in juvenile cases, both dissolution tracks, child support modification at rule 17.300, and unmarried parent custody at rule 17.400. No rule prescribes a custody modification form.
Iowa Judicial Branch: Civil Court Fees
The judicial branch fee schedule lists any domestic relations action under chapter 598 other than a dissolution of marriage, expressly including modification of a dissolution decree, at $130, citing Iowa Code 602.8105(1)(c) and 602.8105(1)(d). It also explains the written Application to Defer Costs route for a party who cannot prepay.
Regional Variances
Iowa custody modification levers at a glance
Waiting period before you may file
None. Iowa Code chapter 598 holds no time bar and no clock of any kind in front of a modification application, so there is also no endangerment escape hatch for a clock to lift. Three Iowa numbers get mistaken for one: section 598.19's ninety days is pre decree, section 598.15's 45 days runs forward from service, and section 598.21C's three months caps retroactive support.
Standard to change the order
A substantial change in circumstances plus the child's best interest. Chapter 598 codifies no general custody modification test; section 598.21C's factor list is written for child, spousal and medical support orders, and the Iowa Judicial Branch self help page nonetheless points parents to that list. Chapter 598's own substantial change declarations are section 598.21D and section 598.41A.
Relocation mechanism
After the fact, not a gate. No notice days, no consent requirement, no pre move filing. Section 598.21D makes a qualifying move something the court may treat as a substantial change once it has happened, which means the move is not restrained but it does arm the other parent's application. Any real pre move limit comes from the decree.
Relocation distance and baseline
150 miles or more, and the baseline is the residence of the minor child at the time that custody was awarded. Not the current residence, not the other parent's home. The figure appears once in the whole chapter. Scope matters too: section 598.21D addresses a relocating parent with joint legal custody and physical care, or sole legal custody.
Court
The Iowa District Court. Iowa has a unified district court with no separate family court and no statutory domestic relations division. Under Iowa Code 598.2 the district court has original jurisdiction of chapter 598 subject matter and venue is the county where either party resides.
Forms
No statewide custody modification form. Iowa Court Rules chapter 17 prescribes mandatory self represented litigant forms in nine kinds of action, and this is not one of them. The two near misses are rule 17.300, scoped to modifying a current child support order, and rule 17.400, which cannot be used by parties who were ever married.
Filing fee
$130 under Iowa Code 602.8105(1)(c), the figure applying to fees paid on and after 1 July 2026. Note that the published Iowa Code 2026 volume still prints the older $110, because it was compiled before the 2026 session act that raised it. The judicial branch fee schedule publishes $130. Costs may be deferred on written application.
Procedural screen and child's wishes
No affidavit screen and no adequate cause gate anywhere in chapter 598. The one mandatory step is the section 598.15 parenting course, and mediation under sections 598.7 and 598.41(8) is discretionary. On the child's wishes Iowa sets no age: section 598.41(3)(f) weighs the child's wishes or strong opposition against the child's age and maturity.
Suggested Compliance Checklist
Pull the decree and locate the award date address
Before you measure anything days after startingIowa Code 598.21D runs its 150 miles from the residence of the minor child at the time custody was awarded, so that address is the only one that counts. Note it, note any geographic restriction or notice term in the decree, and note the date the decree was entered.
Assemble proof of the substantial change
Before you file days after startingIowa puts no waiting period in your way, which means the evidence is the whole case. Gather dated records of what shifted since the decree: school and medical records, work schedules, exchange logs, messages. Attorney review of your filing is available through DocDraft.
Draft the application to modify custody
Once the evidence is assembled days after startingThere is no prescribed Iowa form for this, so the application is drafted from scratch. Identify the decree you want changed, the substantial change since it was entered, and the precise custody, physical care or visitation terms you are asking the court to order instead.
File in the Iowa District Court and pay or defer the fee
Promptly after drafting days after startingFile in the Iowa District Court, venue under Iowa Code 598.2 being the county where either party resides. Pay the $130 fee set by Iowa Code 602.8105(1)(c), or file a written Application to Defer Costs so a judge can decide whether to postpone it. Electronic filing applies unless the court permits paper.
Serve the notice and application on the other party
As soon as the filing is accepted days after startingHave the other party served with the original notice and the application to modify, then file proof of service. Service is also the event that starts the parenting course deadline, so diary the date you serve rather than the date you filed.
Finish the court approved parenting course
Within 45 days of service days after startingIowa Code 598.15 requires both parties to complete a course certified by the judicial district, each arranging and paying for their own, and to submit certification to the court. Until that certification is on file, section 598.15 bars the court from entering a final order.
Prepare for mediation and the hearing
Before the hearing date days after startingThe court may order mediation under Iowa Code 598.41(8) or 598.7, so arrive with a specific written schedule including dates, times and exchange points. Keep following the current order until a judge signs a new one, and note that Iowa Code 598.36 allows a fee award to the prevailing party.
| Task | Description | Document | Days after starting |
|---|---|---|---|
| Pull the decree and locate the award date address | Iowa Code 598.21D runs its 150 miles from the residence of the minor child at the time custody was awarded, so that address is the only one that counts. Note it, note any geographic restriction or notice term in the decree, and note the date the decree was entered. | - | Before you measure anything |
| Assemble proof of the substantial change | Iowa puts no waiting period in your way, which means the evidence is the whole case. Gather dated records of what shifted since the decree: school and medical records, work schedules, exchange logs, messages. Attorney review of your filing is available through DocDraft. | - | Before you file |
| Draft the application to modify custody | There is no prescribed Iowa form for this, so the application is drafted from scratch. Identify the decree you want changed, the substantial change since it was entered, and the precise custody, physical care or visitation terms you are asking the court to order instead. | - | Once the evidence is assembled |
| File in the Iowa District Court and pay or defer the fee | File in the Iowa District Court, venue under Iowa Code 598.2 being the county where either party resides. Pay the $130 fee set by Iowa Code 602.8105(1)(c), or file a written Application to Defer Costs so a judge can decide whether to postpone it. Electronic filing applies unless the court permits paper. | - | Promptly after drafting |
| Serve the notice and application on the other party | Have the other party served with the original notice and the application to modify, then file proof of service. Service is also the event that starts the parenting course deadline, so diary the date you serve rather than the date you filed. | - | As soon as the filing is accepted |
| Finish the court approved parenting course | Iowa Code 598.15 requires both parties to complete a course certified by the judicial district, each arranging and paying for their own, and to submit certification to the court. Until that certification is on file, section 598.15 bars the court from entering a final order. | - | Within 45 days of service |
| Prepare for mediation and the hearing | The court may order mediation under Iowa Code 598.41(8) or 598.7, so arrive with a specific written schedule including dates, times and exchange points. Keep following the current order until a judge signs a new one, and note that Iowa Code 598.36 allows a fee award to the prevailing party. | - | Before the hearing date |
Frequently Asked Questions
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