CL
Written & reviewed by Charles E. Liken Jr., Esq.Colorado Attorney Since 2003 · Deputy District Attorney (2018–2020) · 700+ investigations · Reviewed for accuracy as of July 2026
Quick answers
How soon after divorce can I modify custody or support?
Support can be modified whenever a substantial and continuing change exists (generally a 10% guideline shift). Schedule changes track best interests as circumstances change, but motions to change the primary residence face heightened standards and two-year refiling limits.
Do informal agreements to change support count?
No. Until a court adopts the change, the original order controls — arrears keep accruing at the ordered amount even if both parents agreed otherwise in texts or conversation.
What counts as a substantial and continuing change?
Durable real-world shifts: significant income changes, relocation, remarriage affecting expenses, disability, a child's changed needs — not temporary blips or strategic career downgrades.
Can maintenance ever be non-modifiable?
Yes. If the separation agreement made maintenance contractual and non-modifiable, courts cannot change the amount or term regardless of later hardship — which is why that clause deserves real thought at settlement.
Timing & Tactics
When to file (and when to wait)
Modification motions are forward-looking: support changes generally apply from the filing date, never before it. If the change is real, waiting is the one strategy guaranteed to lose money.
Courts read filing patterns. A parent who returns with a new motion every few months reads as the problem; a parent who documents patiently and files once, with evidence, reads as credible. We help you be the second one.
Step by step
- 1 · Diagnose the standard — 10% guideline shift? Best interests? Endangerment? Contractual bar? The standard picks the strategy.
- 2 · Update the financials — Fresh sworn financial statements and worksheets — modifications live and die on current numbers.
- 3 · File & serve the motion — JDF 1403 (support), 1406 (parenting time), 1401 (maintenance) — with the evidence attached, not promised.
- 4 · Stipulate or be heard — Most modifications settle into stipulated orders; the rest get a hearing where preparation decides.
▶Watch: the Child Support Worksheet seriesModifying support? Watch how the worksheet recalculates when incomes change — free official Colorado videos, in plain English.→
Emergencies are their own lane
True endangerment — abuse, dangerous instability, abduction risk — supports emergency restriction motions on days' notice, not months. If children are at risk, call us and the right authorities today.