Colorado's Child Support Calculation Transforms March 1, 2026: Every Overnight Now Counts
Colorado has eliminated the controversial 93-overnight threshold that previously denied parenting time credits to parents with fewer annual overnights. Under HB 25-1159, effective March 1, 2026, every single overnight with a child now reduces child support obligations on a graduated curve. The Colorado Judicial Branch estimates that 60% of existing child support orders will increase under the new guidelines, representing the most significant change to Colorado child support calculations in over a decade.
Key Facts: Colorado Child Support Changes (HB 25-1159)
| Category | Details |
|---|---|
| What Changed | Elimination of 93-overnight minimum threshold for parenting time credits |
| Effective Date | March 1, 2026 |
| Legislation | Colorado HB 25-1159 |
| Estimated Impact | 60% of existing orders will increase under new guidelines |
| Primary Statute | C.R.S. § 14-10-115 |
| Affected Parties | All parents with active child support orders in Colorado |
Why This Matters Legally
The 93-overnight cliff created a binary system that punished parents with 92 or fewer annual overnights. A parent with 92 overnights (25% parenting time) received zero credit toward child support calculations, while a parent with 93 overnights received full proportional credit. This all-or-nothing approach generated thousands of contested modification cases annually and incentivized litigation over single overnights.
Under the previous framework established in C.R.S. § 14-10-115, Colorado courts applied a shared physical care adjustment only when both parents had at least 93 overnights per year. The mathematical impact was severe: a non-custodial parent earning $6,000 monthly with 92 overnights might pay $1,200 in support, while dropping to $900 with just one additional overnight.
HB 25-1159 replaces this cliff with a graduated credit system. According to analysis from Family Law Software, parents now receive proportional credit starting from the first overnight. A parent with 52 annual overnights (one night per week) will receive approximately 14% parenting time credit, reducing their support obligation accordingly.
How Colorado Law Now Handles Parenting Time Credits
The new calculation under C.R.S. § 14-10-115 applies a linear formula where parenting time credits begin immediately. The Colorado Judicial Branch has published updated worksheets reflecting these changes, available through the state court system as of January 2026.
Three key components define the new system:
- Every overnight counts from day one, with no minimum threshold required
- Credits apply on a graduated percentage basis tied to the share of 365 annual overnights
- The adjustment formula accounts for duplicated expenses when children spend time in both households
For existing orders, the Colorado Judicial Branch has clarified that the March 1, 2026 effective date applies to all modifications filed on or after that date. Parents cannot retroactively apply the new formula to support already paid, but they can file for modification immediately upon the law taking effect.
The 60% increase estimate from the Judicial Branch reflects a mathematical reality: custodial parents who previously received full support without any parenting time adjustment will now see reductions when the other parent has even minimal overnights. Conversely, parents who fell just below the 93-overnight threshold will see their obligations decrease significantly.
Practical Takeaways for Colorado Parents
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Document your actual parenting time now. If you have any overnights with your children, begin tracking them immediately. Under the new law, every night affects your support calculation, making accurate records essential for any modification filing after March 1, 2026.
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Prepare for modification requests. If you pay child support and have any overnights, you may have grounds for modification under C.R.S. § 14-10-122. Colorado requires a 10% change in the calculated amount to modify an existing order, and the new formula may produce that threshold for many families.
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Expect increased litigation through mid-2026. Courts will see a surge of modification filings in the weeks following March 1, 2026. Consider filing early to secure a hearing date, as dockets may extend 60-90 days beyond typical wait times during the transition period.
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Review your parenting plan language. Some older Colorado parenting plans specify minimum overnights tied to the previous support calculation. While the support formula changes automatically, your parenting plan may need updating to reflect actual practice.
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Calculate your projected change before filing. Colorado provides a standardized child support calculator through the Judicial Branch website. Run both the current and new formula to determine whether modification makes financial sense after accounting for legal fees, typically $1,500-$3,500 for an uncontested support modification in Colorado.
Frequently Asked Questions
Does the new Colorado child support law apply to existing orders?
Yes, the new calculation under C.R.S. § 14-10-115 applies to all modification requests filed on or after March 1, 2026. Existing orders remain in effect until modified. Parents must file a motion to modify and demonstrate a 10% or greater change in calculated support to obtain a new order under the revised guidelines.
How much will my Colorado child support change under HB 25-1159?
The change depends on your current overnight count and income ratio. A parent with 52 annual overnights (one night weekly) who previously received zero credit will now receive approximately 14% parenting time credit. For a parent earning $5,000 monthly with the other parent earning $3,000, this could reduce monthly support by $150-$200.
Can I file for modification before March 1, 2026?
You can file anytime, but courts will apply the formula in effect when your motion is heard. Filing in February 2026 for a hearing in April 2026 would result in application of the new formula. The Colorado Judicial Branch recommends waiting until March 1, 2026, to file if your request relies primarily on the formula change.
Will the paying parent automatically get a reduction?
Not automatically. The 60% figure represents cases where calculated support increases for the receiving parent because non-overnight parents lose the benefit of the previous threshold. If you have overnights and pay support, your obligation likely decreases. If you have no overnights, your obligation likely increases as the other parent gains overnight credit.
What documentation do Colorado courts accept for overnight counts?
Colorado courts accept parenting plan schedules, text messages confirming custody exchanges, school pickup records, and calendar documentation. Under C.R.S. § 14-10-124, courts require credible evidence of actual parenting time, not theoretical schedules. Maintain contemporaneous records rather than reconstructing history from memory.
Connect With a Colorado Family Law Attorney
The transition to the new child support formula creates both opportunities and challenges for Colorado parents. Whether you expect your support obligation to increase or decrease under HB 25-1159, understanding your specific situation requires analysis of your income, the other parent's income, and your actual overnight schedule.
This article discusses recent news and provides general legal commentary. It does not constitute legal advice. Every case is unique. Consult a qualified family law attorney for advice specific to your situation.