Colorado Eliminates Dramatic Child Support Swings with New Graduated Formula
Colorado's child support calculation fundamentally changed on March 1, 2026, when HB25-1159 took effect, eliminating the notorious "93-overnight cliff" that previously caused support payments to swing by hundreds of dollars based on a single overnight visit. The new law introduces a graduated parenting time adjustment that recognizes every overnight a parent spends with their child, a $1,790 monthly self-support reserve protecting low-income parents, and an expanded income schedule covering combined parental incomes up to $40,000 per month.
Key Facts: Colorado HB25-1159 Child Support Reform
| Category | Details |
|---|---|
| What Changed | 93-overnight cliff eliminated; graduated parenting time adjustment implemented |
| Effective Date | March 1, 2026 |
| Jurisdiction | Colorado (statewide) |
| Key Statute | C.R.S. § 14-10-115 |
| Self-Support Reserve | $1,790/month (135% of federal poverty level for one person) |
| Income Cap | $40,000 combined monthly gross income (up from $30,000) |
| Practical Impact | More predictable support calculations; reduced litigation over overnight counts |
Why This Matters: The 93-Overnight Problem Created Perverse Incentives
The previous Colorado child support formula created an all-or-nothing threshold at 93 overnights per year that distorted custody negotiations and court proceedings for decades. Under the old system codified in C.R.S. § 14-10-115, a parent with 92 overnights received zero credit for parenting time in the support calculation, while a parent with 93 overnights triggered the "shared custody" formula that could reduce their support obligation by 30-50%.
This cliff effect, as reported by Burnham Law, produced absurd outcomes where parents fought bitterly over a single overnight—not because one additional night materially changed their child's living situation, but because crossing the 93-night threshold could mean $400-600 per month in payment differences. Family courts across Colorado saw countless motions filed solely to manipulate overnight counts, wasting judicial resources and escalating conflict between co-parents.
The new graduated formula eliminates this gaming incentive entirely. Every overnight now counts proportionally in the calculation, meaning the difference between 92 and 93 overnights produces a modest, incremental adjustment rather than a dramatic cliff.
How Colorado's New Graduated Parenting Time Adjustment Works
Under HB25-1159, Colorado now calculates child support using a continuous function that credits each parent for their actual parenting time from the first overnight forward. The formula applies a parenting time adjustment that scales smoothly based on the percentage of overnights each parent exercises, replacing the old binary threshold.
The calculation begins with determining each parent's basic child support obligation based on their proportional share of combined income. The new income schedule in C.R.S. § 14-10-115 now extends to $40,000 in combined monthly gross income, a 33% increase from the previous $30,000 cap. For high-income families earning above this threshold, courts apply the schedule ceiling plus a percentage of income above that amount.
The graduated adjustment then reduces the higher-earning parent's obligation incrementally as their parenting time increases. A parent with 73 overnights (20% parenting time) receives a modest adjustment, while a parent with 146 overnights (40% parenting time) receives a proportionally larger credit. This eliminates the previous cliff where parents below 93 overnights received zero adjustment regardless of whether they had 50 or 92 nights.
The $1,790 Self-Support Reserve Protects Low-Income Parents
HB25-1159 introduces a meaningful protection for low-income obligor parents that Colorado previously lacked. The new self-support reserve of $1,790 per month—set at 135% of the 2026 federal poverty level for a single person—ensures that paying parents retain enough income to meet their own basic needs.
Under the previous statute, courts could order child support that left the paying parent below subsistence level, creating impossible situations where compliance meant choosing between supporting their child and paying their own rent. The new reserve functions as a floor: if paying the calculated support amount would reduce an obligor's income below $1,790 monthly, the court must adjust the order downward.
This provision affects an estimated 15-20% of Colorado child support cases involving parents earning less than $35,000 annually. Courts retain discretion to deviate from this reserve in cases involving imputed income or voluntary underemployment, but must make specific findings justifying any deviation.
Practical Takeaways for Colorado Parents
-
Existing child support orders do not automatically change under HB25-1159. Parents seeking to benefit from the new graduated formula must file a motion to modify under C.R.S. § 14-10-122, demonstrating a substantial and continuing change in circumstances.
-
The 10% threshold for modification still applies. Colorado courts generally require a 10% or greater change in the calculated support amount before approving a modification, regardless of which formula applies.
-
Document your actual parenting time carefully. With every overnight now counting toward the calculation, accurate records of overnights exercised—not just overnights ordered—become more important than ever for modification requests.
-
High-income parents should recalculate under the new $40,000 income cap. Families with combined monthly incomes between $30,000 and $40,000 who previously had support calculated at the old ceiling may see different results under the expanded schedule.
-
Low-income obligors should review whether the self-support reserve applies to their situation. If your current order leaves you below $1,790 monthly after payment, you may have grounds for modification under the new statute.
Frequently Asked Questions
Does HB25-1159 automatically change my existing child support order?
No, existing Colorado child support orders remain in effect at their current amounts until a party files a motion to modify under C.R.S. § 14-10-122. Courts require proof of a substantial and continuing change in circumstances, typically meaning the new calculation differs by at least 10% from the current order. The law's effective date of March 1, 2026 does not trigger automatic recalculation of existing orders.
How does the graduated parenting time adjustment calculate my credit for overnights?
The new formula credits each parent proportionally based on their percentage of total annual overnights (365 nights). A parent exercising 73 overnights (20%) receives a 20% parenting time adjustment, while 146 overnights (40%) yields a 40% adjustment. This replaces the old binary system where parents needed exactly 93 overnights to qualify for any shared custody adjustment under the previous C.R.S. § 14-10-115.
What income counts toward the $40,000 combined monthly gross income cap?
Colorado includes wages, salaries, commissions, bonuses, self-employment income, rental income, dividends, interest, trust distributions, Social Security benefits, workers' compensation, unemployment benefits, and pension payments. The expanded cap from $30,000 to $40,000 means families earning between $360,000 and $480,000 annually now have support calculated using the statutory schedule rather than judicial discretion.
Who qualifies for the $1,790 self-support reserve protection?
The self-support reserve applies to obligor parents whose income after paying the calculated child support amount would fall below $1,790 per month (135% of the federal poverty level). This primarily affects parents earning approximately $35,000 or less annually. Courts must reduce the support obligation to preserve this minimum unless specific findings justify deviation, such as evidence of voluntary underemployment.
Can I modify my support order immediately after March 1, 2026?
You may file a motion to modify at any time after March 1, 2026, but approval requires demonstrating that the new calculation under HB25-1159 produces a result differing by at least 10% from your current order. Simply wanting to use the new formula is insufficient; you must show the graduated adjustment or other changes materially affect your calculated obligation. Consult a Colorado family law attorney to run calculations before filing.
Colorado parents navigating child support questions under the new law can find exclusive Colorado family law attorneys through our directory.
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.