CAN A COLORADO CHILD SUPPORT ORDER BE MODIFIED?
Yes. A Colorado child support order can be modified when there has been a substantial and continuing change in circumstances, or when the order does not provide for the child's medical support. If applying the current guidelines to the parents' circumstances would change support by less than 10% a month, the law treats the change as not substantial and continuing.
Timing matters as much as the reason. A modification generally reaches back only to the date the motion is filed, so a parent who waits months after a job loss or a schedule change usually cannot recover that time.
This article covers the legal standard, what does and does not qualify, how to file in Colorado, how far back a change reaches, the county review option, and whether the 2026 guideline changes are a reason to file.
TABLE OF CONTENTS
- The Legal Standard for Modifying Child Support
- Changes That Can Justify a Modification
- Changes That Usually Do Not
- Do the 2026 Guideline Changes Justify a Modification?
- How to File a Motion to Modify Child Support
- How Far Back a Modification Reaches
- Asking County Child Support Services for a Review
- Frequently Asked Questions
- Talking With a Colorado Springs Child Support Lawyer
- Sources
THE LEGAL STANDARD FOR MODIFYING CHILD SUPPORT
Under C.R.S. 14-10-122, child support may be modified only upon a showing of changed circumstances that are substantial and continuing. A separate ground exists when the existing order does not contain a provision for the child's medical support, such as health insurance or uncovered medical costs.
A modification is not a chance to argue the original case again. The question is what has changed since the current order was entered, and whether the change is large enough and lasting enough to matter.
The 10 Percent Rule
The statute measures "substantial" by running the numbers. If applying the guidelines in C.R.S. 14-10-115 to the parties' circumstances when the motion is filed results in less than a 10% change in support per month, the change is deemed not to be substantial and continuing.
In practice, a recalculation that moves support by 10% or more is treated as presumptively substantial and continuing, and the Judicial Branch's instructions describe the threshold as a 10% increase or decrease. Colorado appellate decisions describe that presumption as rebuttable, not automatic.
The 10% figure is about the support amount, not about income. A 10% raise does not automatically mean a 10% change in support, because the worksheet also depends on the other parent's income, the overnights and the add-on costs.
What Continuing Means
A continuing change is one that is more than temporary. A short layoff with a firm return date is less likely to qualify than a permanent change in pay or in the parenting schedule.
CHANGES THAT CAN JUSTIFY A MODIFICATION
The Colorado Judicial Branch and Colorado Child Support Services list common reasons to seek a change:
- A lasting increase or decrease in either parent's income
- A change in the number of overnights the children spend with each parent
- A change in the cost of child care or the children's health insurance
- Emancipation of one child when the order covers two or more children
- An order that has no provision for medical or dental support
Overnights deserve special attention because they now affect support at every level. If the parenting schedule has changed, for example after a move or an agreed change in parenting time and parental responsibilities, recalculate support as well.
When a child's physical care changes by court order, voluntarily or by agreement, C.R.S. 14-10-122 allows the existing obligation to be modified or ended as of the date physical care changed, with the limits explained below.
CHANGES THAT USUALLY DO NOT
New Expenses
According to the Judicial Branch's instructions, added expenses such as a new house or a new car do not qualify for a modification. Support is calculated from income, overnights and specific add-on costs, not from a parent's overall budget.
Voluntary Unemployment or Underemployment
Quitting a job or cutting hours is unlikely to lower support. When a parent is voluntarily unemployed or underemployed, C.R.S. 14-10-115 requires support to be calculated on potential income, meaning what the parent could earn.
The statute has exceptions, including temporary employment reasonably intended to lead to higher income, a good-faith career choice that is not intended to deprive a child of support and does not unreasonably reduce it, and full-time enrollment in an educational or vocational program that meets the statute's conditions. Potential income is also not imputed to a parent who is physically or mentally incapacitated, a parent caring for a child under the age of 24 months, or a parent incarcerated on a sentence of 180 days or more.
Side Agreements
Parents sometimes agree informally on a new amount. That agreement does not change the order: modifications require court approval or action through the county administrative process, and the existing order stays enforceable until then.
DO THE 2026 GUIDELINE CHANGES JUSTIFY A MODIFICATION?
HB25-1159 changed the formula as of March 1, 2026. The schedule now reaches $40,000 in combined monthly adjusted gross income, every overnight counts toward a parenting time credit, and the low-income rules changed, as explained in our overview of child support in Colorado.
The new law did not recalculate existing orders on its own, so an order entered before March 1, 2026 remains in force until it is modified. The modification statute also does not say in so many words that a change in the guidelines is itself a changed circumstance.
What C.R.S. 14-10-122 does say is that the court applies the guidelines in C.R.S. 14-10-115 to the parties' circumstances when the motion is filed, and since March 1, 2026 those are the new guidelines. The practical questions are whether the new formula, applied to your current facts, moves support by 10% or more, and whether anything else has changed.
Colorado case law from earlier guideline changes points the same way. The official annotations to C.R.S. 14-10-122 summarize decisions holding that applying new guidelines that change support by more than 10 percent creates a rebuttable presumption that the existing order must be modified (In re Marriage of Pugliese, 761 P.2d 277 (Colo. App. 1988); In re Marriage of Aldrich, 945 P.2d 1370 (Colo. 1997)).
The new overnight rule may matter most for parents with 92 or fewer overnights a year, who received no shared-care adjustment under the old rule. Run a worksheet with your current facts and get advice before you file.
HOW TO FILE A MOTION TO MODIFY CHILD SUPPORT
You file in the court that entered the existing order, either online through Colorado Courts E-Filing or with the clerk. In El Paso and Teller counties that is the Fourth Judicial District, and El Paso County cases are handled at the judicial building at 270 S. Tejon Street in Colorado Springs.
The Judicial Branch's instructions, JDF 1403i, describe two paths. They still name the old worksheet, JDF 1820, which the Judicial Branch discontinued on March 2, 2026, so use the current Support Worksheet, JDF 1821.
| Form | What it is | When you need it |
|---|---|---|
| JDF 1404 | Stipulation Regarding Child Support Modification | Both parents agree |
| JDF 1403 | Motion to Modify Child Support | The parents do not agree |
| JDF 1111 | Sworn Financial Statement | Each parent, on either path |
| JDF 1821 | Support Worksheet (revised March 1, 2026) | Either path |
| JDF 1104 | Certificate of Compliance | Motion path, within 42 days after service |
| JDF 1313 | Certificate of Service | With filings you send to the other parent |
| JDF 1405 | Order Re: Modification of Child Support | Proposed order, required in some counties |
If You and the Other Parent Agree
Parents who agree file the stipulation, each parent's Sworn Financial Statement, a worksheet and a certificate of service. According to the instructions, the court decides within 49 days of filing whether to approve it, and no hearing is required.
If You Do Not Agree
- Prepare the motion. Explain what has changed since the current order was entered and why the change is substantial and continuing.
- Complete your financial statement and a worksheet. If you do not yet have the other parent's financial information, the instructions allow you to file the worksheet once you receive it.
- Pay the filing fee. The Judicial Branch fee list shows $105 for a motion to modify a decree or final order filed more than 60 days after the order. Fees can change, and a fee waiver may be available.
- Send copies. Mail every document you file to the other parent, and to the county child support office if it is involved in the case, with a certificate of service.
- Complete financial disclosure. Within 42 days after the motion is served, file the Certificate of Compliance and send your Sworn Financial Statement to the other parent.
- Wait for the court's next step. The court decides within 49 days of filing whether to rule on the papers, issue a case management order requiring the parents to exchange information, or set a hearing, and it may require mediation or a status conference first.
The other parent may file a written response, and the Judicial Branch form for that is JDF 1315. If a hearing is set, both parents can appear and make their case about income, expenses and overnights.
If the amount changes, the income assignment must also be modified to match. The instructions also warn that filing false financial information can lead to fines, jail, or a case being reopened for fraud.
HOW FAR BACK A MODIFICATION REACHES
Under C.R.S. 14-10-122, a modification should be effective as of the date the motion was filed, unless the court finds that would cause undue hardship or substantial injustice. The order cannot be modified back to a date before filing unless there was a mutually agreed change of physical custody.
The court can also modify installments that came due between filing and the order, even if the circumstances behind the motion no longer exist when the order is entered.
When physical care changes, the statute allows the obligation to be modified as of the date of the change. The court will not reach back more than five years before the motion was filed unless it finds that limit substantially inequitable, unjust or inappropriate.
This is why waiting is costly. Support that came due under the old order before you filed generally remains owed, and the article on retroactive child support in Colorado explains past-due amounts and interest.
ASKING COUNTY CHILD SUPPORT SERVICES FOR A REVIEW
If your case is open with county child support services, you can ask the county to review the order instead of filing your own motion. Under C.R.S. 26-13-121, either party may request a review in writing with financial information, and the county must notify the parties at least once every 36 months of the right to ask.
If 36 months or more have passed since the last review, the county must grant the request; sooner than that, you need to give a reason that could change the amount under the guidelines. The county applies the same 10% test.
What happens next depends on the kind of order. For a court order, the county files a motion to modify with the court if an adjustment is appropriate. For an order the county itself entered through the administrative process, the county reviews and can modify it under C.R.S. 26-13.5-112, and the change can reach only payments that come due after the request.
Colorado Child Support Services says review requests must be made in writing at the county office handling the case, with an Income and Expense Affidavit and supporting documents, and that the process can take up to six months. Because a modification of a court order is generally effective from when the motion is filed, ask how timing works in your case before relying on a review.
FREQUENTLY ASKED QUESTIONS
How Much Does Child Support Have to Change Before It Can Be Modified?
If the recalculated amount would differ from the current order by less than 10% a month, the change is deemed not substantial and continuing. A change of 10% or more is generally treated as presumptively substantial, though that presumption can be rebutted.
Is a Child Support Modification Retroactive in Colorado?
Generally only to the date the motion was filed, and not earlier. The main exception is a change of physical care, which can reach back to the date of the change, subject to a five-year limit.
What Is the Filing Fee to Modify Child Support in Colorado?
The Colorado Judicial Branch fee list shows $105 for a motion to modify a decree or final order filed more than 60 days after the order. Fees can change, and a fee waiver may be available if you cannot afford it.
Can I Modify Child Support If I Lose My Job?
Possibly, if the loss is involuntary and lasting and the recalculation changes support by 10% or more. File promptly and keep paying what you can, because the order stays in effect until it is modified.
Are the 2026 Guideline Changes Alone a Reason to Modify?
Not automatically. The court applies the guidelines in effect when you file, and Colorado decisions from earlier guideline changes held that a change of more than 10 percent under new guidelines creates a rebuttable presumption that the order should be modified, so run the new formula on your current circumstances first.
Can County Child Support Services Change My Order?
If your case is open there, the county can review the order. For a court order, it files a motion to modify with the court if an adjustment is appropriate; for an order the county entered administratively, it can modify the order through its own review process.
TALKING WITH A COLORADO SPRINGS CHILD SUPPORT LAWYER
A modification turns on the numbers and on the timing. A Colorado Springs child support lawyer can run the worksheet with you, tell you whether the change is likely to meet the 10% threshold, and help you file before more months pass at the old amount. For related changes to parenting time or maintenance, see our page on post-decree modifications.
Moran, Allen & Associates Family Law Attorneys represents parents in El Paso County and Teller County. Call (719) 447-0762 in Colorado Springs or (719) 686-7554 in Woodland Park, or schedule a consultation to talk through your situation. You can also read more about our Colorado Springs family law practice.
For more reading, browse more articles on child support, articles on child custody and parenting time, or all of our Colorado family law articles.
This article is general information about Colorado law as of October 2026 and is not legal advice. Laws, fees and court forms change, so speak with a licensed Colorado attorney about your own situation.
SOURCES
- C.R.S. 14-10-122, Modification and Termination of Support
- C.R.S. 14-10-115, Child Support Guidelines
- C.R.S. 26-13-121, Review and Modification of Child Support Orders
- C.R.S. 26-13.5-112, Modification of Administrative Orders
- HB25-1159, Child Support Commission Recommendations (Colorado General Assembly)
- HB25-1159, enrolled act text
- HB26-1217, Correct Child Support Guidelines Statutory Cites (effective date of the 2026 guideline subsections)
- Colorado Judicial Branch, JDF 1403i How to Modify Child Support (revised July 13, 2026)
- Colorado Judicial Branch, Change Child Support
- Colorado Judicial Branch, Modifying Child Support Order (self-help guide)
- Colorado Judicial Branch, List of Fees
- Colorado Judicial Branch, JDF 1821 Support Worksheet
- Colorado Judicial Branch, March 2026 Form Blotter (JDF 1820 discontinued, JDF 1821 updated)
- Colorado Child Support Services, Changing an Order