Back Child Support and Arrears in Colorado

Why Arrears Are So Difficult to Undo

Colorado treats each missed payment as its own judgment. Under C.R.S. 14-10-122 ^[1], a support payment becomes a final money judgment when it is due and not paid. It can then be enforced like any other judgment, without further action by the court.

The court does not have to enter anything for that to happen. The judgment exists by operation of law the day the payment is missed.

Enforcing it is a separate step. To collect on accrued support, the statute directs the obligee to file a verified entry of support judgment with the court that issued the order. That filing fixes the total and revives the individual unsatisfied judgments within the period it covers.

The same statute limits how far back a modification can reach. A modification is generally effective as of the date the motion was filed, and the order cannot be modified retroactively to a point before filing.

That is why the calendar matters more than the explanation. A parent who lost a job in January and files in July has locked in six months at the old amount, no matter how legitimate the job loss was.

The narrow exception

There is one meaningful exception. When physical care of the child actually changed, whether by court order, voluntarily, or by mutual agreement, support may be modified back to the date the change occurred.

Even then the statute caps retroactivity at five years before the motion was filed, unless the court finds applying that limit would be substantially inequitable, unjust, or inappropriate. This exception rewards parents who can document when the child actually moved.

Whether your situation fits that exception, or whether you simply need the ongoing number changed, is the threshold question in any Colorado child support modification.

How Interest Builds, and When a Court Can Reduce It

Colorado applies two different interest rates to arrears depending on when each payment came due, and the older rate is considerably harsher.

• Payments due before July 1, 2021. Interest runs at four percentage points above the statutory rate and may be compounded monthly.
• Payments due on or after July 1, 2021. Interest runs at two percentage points above the statutory rate and may be compounded annually.

Those are formulas, not fixed numbers. Colorado’s statutory rate is currently eight percent, so the two provisions currently produce twelve percent and ten percent, and both figures move if the underlying statutory rate changes.

A balance that spans that date carries both calculations. In long-running cases the pre-2021 portion compounding monthly is usually what drives the total, and interest can end up exceeding the unpaid principal.

Interest is collectible, not automatic

The statute says interest may be collected by the judgment creditor and may be waived by that creditor. A parent who is owed support is not required to maintain interest balance accounts and can choose not to pursue interest at all.

There is also a path for the parent who owes. If the other parent seeks interest, the obligor may apply to the court and ask it to find good cause to disallow the calculated interest or a portion of it.

The court weighs several things, including whether good cause existed for the nonpayment. It may also set an equitable period of repayment for the interest and arrears owed.

This is the part of an arrears case most parents do not know exists. The principal is usually arithmetic, but the interest and the repayment schedule are where a documented explanation can still change the outcome.

Not Sure What Your Actual Balance Is?

Arrears cases turn on a number, and the number is wrong more often than parents expect. Registry records, direct payments, credits, and two different interest rates all have to reconcile before anyone can negotiate anything.

A short conversation is usually enough to tell whether the balance you were given holds up and what your realistic options are. You can reach our Colorado child support team to talk through where your case stands.

How Colorado Collects Back Support

Collection runs on two tracks that can operate at the same time. Colorado Child Support Services can act administratively, and either parent can go to district court ^[2].

• Income assignment. Under C.R.S. 14-14-111.5, a payment toward arrears plus interest can be built into an active income assignment, subject to the statutory limits on how much of a paycheck can be withheld.
• Tax refund and lottery intercept. Enforcement units can certify past-due amounts to the IRS and the Department of Revenue without a court order or a separate entry of support judgment.
• Liens. Past-due support can attach to real property and to certain payments, including insurance claim proceeds and settlements. A lien on personal property stays in effect for the earlier of twelve years or full payment, with no renewal required.
• License actions. Professional, occupational, and recreational licenses can be suspended or denied when a parent owes more than six months of support and pays less than half the current monthly obligation. Driver licenses follow a separate notice process.
• Contempt. A district court can find a parent in contempt for violating a support order. Colorado treats remedial and punitive contempt as two different proceedings with different burdens.

Which track fits depends on what you need and how fast. The administrative route costs less and runs on its own schedule, while court gives you contempt, fee awards, and a judge who can address the whole picture at once. Our page on Colorado child support enforcement walks through how each pathway actually proceeds.

License suspension carries a detail worth knowing. The first time these procedures are used against a parent, the agency may only suspend or deny the license, while repeat use allows revocation with full reapplication required afterward.

Remedial and punitive contempt are not the same thing

Colorado draws a sharp line between the two, and the distinction decides what a filing can realistically achieve.

• Remedial contempt aims to force compliance. It is proved by a preponderance of the evidence and requires showing the parent has the present ability to comply, so it can be purged by paying.
• Punitive contempt punishes past conduct. It requires proof beyond a reasonable doubt, including that the refusal to comply was willful, and it cannot be purged after the fact.

So a parent with no present ability to pay is difficult to hold in remedial contempt. A parent who had the money and chose not to pay is exposed to the punitive track instead. Attorney fees are available on the remedial side.

If You Are Owed Back Support

Start with the number, not the motion. A collection effort built on a balance you cannot substantiate tends to stall at the first hearing.

• Pull the full payment history from the Family Support Registry and reconcile it against your own records of what actually arrived.
• Account for direct payments. Credits the other parent can prove will come off the balance eventually, so it is better to find them now than to be surprised at a hearing.
• Separate principal from interest and split the principal at July 1, 2021, since the two periods compound differently.
• Decide whether you want interest. You can waive it, and in some cases waiving interest is what makes a realistic payment plan possible.
• Choose your forum deliberately. Administrative enforcement and a court filing serve different goals, and running both without a plan can slow each one down.

If You Owe Back Support

The most expensive thing you can do is wait. Every month that passes before you file is a month the court cannot reach.

• File the modification now if your income or parenting time has genuinely changed, because retroactivity runs to the filing date and not to the date your circumstances shifted.
• Keep paying what you can on the current order. A payment record showing consistent partial payment reads very differently than a record showing nothing.
• Document why the nonpayment happened. Good cause for the nonpayment is something the court can consider when deciding whether to disallow interest.
• Ask about a repayment period. The court has authority to set an equitable schedule for paying interest and arrears rather than treating the whole balance as due immediately.
• Do not rely on a private agreement. An informal deal to pay less does not change a court order, and the unpaid difference still accrues as arrears.

If the reason the number stopped fitting is that your child’s living arrangement changed, that belongs in the analysis too. How overnights are counted feeds directly into the guideline calculation, which is covered under Colorado child custody.

What Changed in 2026, and What Did Not

Colorado overhauled how child support is calculated effective March 1, 2026 through House Bill 25-1159 ^[3]. The act updated the guideline schedule and the monthly incomes eligible for a reduced low-income adjustment. It also replaced the old parenting time credit with a formula that gives credit for every overnight.

The old approach gave a parent no parenting time credit at all until they reached ninety-three overnights a year. That threshold is gone, and credit now begins with the first overnight.

The new guidelines apply to orders entered or modified on or after March 1, 2026. They are not retroactive, so they do not recalculate what accrued under your existing order.

The 2026 guideline amendments do not by themselves reopen or recalculate support that has already accrued. The other 2026 legislation touching the guidelines corrected statutory cross references ^[4].

Because Colorado amends its statutes every session, treat any arrears figure calculated some time ago as a starting point rather than a settled number ^[5].

The practical takeaway is a split one. Running your numbers under the new formula may well justify a modification going forward, and that modification will do nothing at all to the balance already on the books.

How Johnson Law Group Handles Back Child Support

We start by rebuilding the balance from the records rather than accepting the figure either side is working from. In arrears cases that reconciliation is frequently where the real dispute turns out to be.

From there the work follows a consistent sequence:

• Reconcile the ledger. Registry history, direct payments, credits, and the two interest periods, assembled into a balance that will survive scrutiny.
• Stop the growth first. If a modification is warranted, filing it early is worth more than any argument made later about why the payments stopped.
• Pick the right forum. Administrative enforcement, a court filing, or both in sequence, chosen against what you actually need rather than what moves fastest.
• Build the interest record. Whether you are seeking interest or asking the court to disallow it, that question is decided on documented facts about the nonpayment.
• Negotiate terms that hold. A repayment schedule a parent can actually meet collects more than an order that guarantees another default.

We will not promise a particular ruling, and we will tell you plainly when a balance is what it is. What you get instead is a clear read on the real number, the parts of it that are still open, and a plan that matches both.

Across our five Colorado offices, that steadiness is what we mean when we describe ourselves as your North Star.