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Colorado Child Support Calculator - Free & Easy

Free Colorado child support calculator. Estimate payments accurately based on state guidelines. Get a quick, reliable projection to help with your planning.

⚡ Free to use 📱 Mobile friendly 🕒 Updated: June 14, 2026
🧮 Child Support Calculator Colorado
📊 Monthly Child Support Obligation by Parental Income Scenarios (Colorado Guidelines)
📋 Table of Contents
  1. Use the Child Support Calculator Colorado
  2. What is Child Support Calculator Colorado?
  3. How to Use
  4. Formula Used
  5. Example Calculation
  6. Benefits
  7. Tips and Tricks
  8. Conclusion
  9. FAQ (8 Questions)

What is Child Support Calculator Colorado?

The Child Support Calculator Colorado is a free, online tool designed to estimate the amount of child support one parent may be required to pay to the other under Colorado’s statutory guidelines. This calculator applies the state’s income shares model, which calculates support based on the combined monthly adjusted gross income of both parents and the number of overnights each parent spends with the child. For real-world relevance, this tool helps parents, attorneys, and mediators quickly approximate support obligations without needing to manually compute the complex worksheet required by Colorado Revised Statutes º 14-10-115.

Parents going through divorce, separation, or paternity cases use this calculator to understand potential financial responsibilities before entering negotiations or court proceedings. It matters because Colorado courts presume the guideline amount is correct, making an accurate estimate essential for budgeting and legal strategy. Additionally, parents who are modifying an existing order due to job loss, promotion, or changed parenting time rely on this tool to assess whether a significant enough change has occurred to warrant a formal modification.

This free online tool eliminates the guesswork by prompting you to enter your specific income, deductions, and parenting time details, then instantly producing a support estimate that aligns with Colorado’s current guidelines. It is not a substitute for legal advice but provides a solid starting point for informed discussions.

How to Use This Child Support Calculator Colorado

Using the Child Support Calculator Colorado is straightforward, but accuracy depends on entering correct data. Follow these five steps to get a reliable estimate that reflects your unique situation.

  1. Enter Each Parent’s Monthly Gross Income: Begin by inputting the monthly gross income for both the custodial and non-custodial parents. Gross income includes wages, salaries, commissions, bonuses, self-employment income, unemployment benefits, workers’ compensation, Social Security benefits, and any other regular cash flow. Do not include income from public assistance programs like TANF or SSI. If a parent is voluntarily unemployed or underemployed, Colorado law may impute income based on their earning potential, so use a reasonable estimate if that applies.
  2. Add Allowed Deductions: Colorado permits certain deductions from gross income before calculating child support. These include federal and state income taxes (estimated using withholding tables), FICA (Social Security and Medicare) taxes, mandatory retirement contributions, health insurance premiums paid for the child, and any pre-existing child support or maintenance (alimony) orders paid to someone else. Enter these amounts accurately because they reduce the parent’s adjusted gross income, which directly impacts the final support number.
  3. Input Parenting Time (Overnights): The number of overnights each parent has with the child per year is critical. Colorado uses a formula that adjusts support when the non-custodial parent has more than 93 overnights (approximately 25% of the year). Enter the exact number of overnights for both parents, ensuring the total equals 365. If parenting time is split 50/50 (182.5 overnights each), the calculator applies a different adjustment that can significantly reduce or even eliminate a support obligation depending on income disparity.
  4. Include Child-Related Expenses: Input additional costs such as the child’s health insurance premium (the portion covering only the child, not the parent), unreimbursed medical expenses (deductibles, copays, orthodontia), and work-related child care costs. These expenses are typically divided between parents in proportion to their incomes. For example, if one parent earns 60% of the combined income, they pay 60% of these add-on costs. Be prepared with actual premium amounts and average monthly child care bills.
  5. Select the Number of Children: Choose how many children the support order covers. Colorado’s guidelines use a schedule of basic child support obligations that increases with each additional child, but not linearly. For instance, support for two children is roughly 1.5 times the amount for one child at the same income level. If you have children from multiple relationships, the calculator may need to adjust for prior orders, so note that this tool assumes all children are from the same parents.

For best results, gather recent pay stubs, tax returns, and child care receipts before starting. If you are unsure about any figure, use a conservative estimate and consult a family law attorney for final numbers. The calculator updates automatically as you change inputs, allowing you to experiment with different scenarios, such as what would happen if parenting time increased or if one parent’s income changed.

Formula and Calculation Method

The Child Support Calculator Colorado uses the Income Shares Model, which is the statutory method mandated by Colorado law. This model assumes that a child should receive the same proportion of parental income they would have if the parents lived together. The formula combines both parents’ incomes, applies a basic obligation from a state-determined schedule, and then prorates that obligation based on each parent’s share of the combined income. Adjustments are made for parenting time and additional expenses.

Formula
Basic Child Support Obligation = (Combined Adjusted Gross Income × Percentage from Schedule) + Add-On Costs
Each Parent’s Share = Basic Obligation × (Parent’s Income / Combined Income)
Adjusted Support = Non-Custodial Parent’s Share – (Custodial Parent’s Share × Parenting Time Adjustment)

Variables explained: Combined Adjusted Gross Income (AGI) is the sum of both parents’ monthly gross incomes minus allowed deductions. The "Percentage from Schedule" is found in Colorado’s Basic Child Support Schedule, a table published by the state that lists obligation amounts based on combined AGI and number of children. Add-On Costs include health insurance, child care, and extraordinary medical expenses. The Parenting Time Adjustment reduces the non-custodial parent’s obligation when they have more than 93 overnights, using a formula that accounts for the custodial parent’s reduced expenses during those times.

Understanding the Variables

The most critical variable is each parent’s Adjusted Gross Income (AGI). To calculate AGI, start with monthly gross income, then subtract estimated taxes (federal, state, FICA), mandatory retirement contributions, and any prior child support or maintenance paid. Colorado does not deduct voluntary savings, 401(k) loans, or credit card payments. For example, if Parent A earns $5,000 gross per month but pays $800 in taxes, $200 in FICA, and $100 in mandatory pension contributions, their AGI is $3,900. This AGI is then used to determine their proportional share of the basic obligation.

The Basic Child Support Schedule is a table that increases as combined AGI rises but at a decreasing rate. For a combined AGI of $4,000 with one child, the basic obligation might be $1,000 per month. For $8,000 combined, it might be $1,600. The schedule is designed to cover the child’s basic needs—food, shelter, clothing, and routine medical care—but not extraordinary expenses. The schedule is updated periodically by the Colorado Department of Human Services to reflect inflation and cost-of-living changes.

Parenting time is measured in overnights. Colorado uses a specific adjustment formula: if the non-custodial parent has between 93 and 182 overnights (25% to 50% of the year), their support obligation is reduced by a percentage equal to (Overnights × 0.5) / 365. For example, 140 overnights results in a 19.2% reduction. For 50/50 parenting time (182.5 overnights), the reduction is 25%, and the obligation may be further adjusted if the parents’ incomes are close. If the non-custodial parent has fewer than 93 overnights, no reduction applies.

Step-by-Step Calculation

Step one: Calculate each parent’s monthly adjusted gross income. Subtract allowed deductions from gross income for both parents. Step two: Add the two AGIs to get combined AGI. Step three: Find the basic child support obligation from the Colorado schedule for the combined AGI and number of children. Step four: Determine each parent’s percentage share of combined AGI (divide each parent’s AGI by combined AGI). Step five: Multiply the basic obligation by each parent’s percentage to get their share. Step six: Add any add-on costs (health insurance, child care, medical) to the basic obligation, then prorate those costs by the same percentages. Step seven: Apply the parenting time adjustment to the non-custodial parent’s share if applicable. The final support amount is the non-custodial parent’s adjusted share minus any amounts already paid for add-on costs. If the custodial parent owes support (rare), the formula reverses.

Example Calculation

Let’s walk through a realistic scenario to demonstrate how the Child Support Calculator Colorado works in practice. This example uses numbers a typical Colorado family might encounter.

Example Scenario: Maria and David live in Denver, Colorado. They have one child, age 7. Maria is the custodial parent (child lives with her 250 overnights per year) and earns a monthly gross income of $4,200 as a nurse. David is the non-custodial parent (115 overnights per year) and earns $6,800 monthly as a software developer. Maria pays $300 per month for the child’s health insurance premium (child-only portion). David pays $200 per month for work-related child care. Both parents have estimated monthly tax deductions: Maria $800, David $1,400. No prior support orders exist.

Step one: Calculate adjusted gross incomes. Maria: $4,200 gross – $800 taxes – $0 other deductions = $3,400 AGI. David: $6,800 gross – $1,400 taxes = $5,400 AGI. Combined AGI = $3,400 + $5,400 = $8,800. Step two: Look up the basic child support obligation for one child at $8,800 combined AGI on the Colorado schedule. Assume the schedule says $1,500 per month (this is approximate; actual schedule values change). Step three: Maria’s income share = $3,400 / $8,800 = 38.64%. David’s share = 61.36%. Step four: Maria’s share of basic obligation = 38.64% × $1,500 = $579.55. David’s share = 61.36% × $1,500 = $920.45. Step five: Add-on costs total = $300 (health insurance) + $200 (child care) = $500. Maria’s share of add-ons = 38.64% × $500 = $193.20. David’s share = 61.36% × $500 = $306.80. However, Maria already pays $300 for insurance, so she gets a credit. Step six: Parenting time adjustment. David has 115 overnights, which is between 93 and 182. Adjustment percentage = (115 × 0.5) / 365 = 15.75%. David’s adjusted share = $920.45 × (1 – 0.1575) = $920.45 × 0.8425 = $775.48. Step seven: Final support. David owes his adjusted share ($775.48) plus his share of add-ons ($306.80) minus any credits. Since Maria pays $300 insurance, David owes her 61.36% of that, which is $184.08, but this is already included in the add-on calculation. The net support David pays Maria is $775.48 + $306.80 – $0 (no credit for child care because David pays it directly) = $1,082.28 per month. Maria uses this to cover the child’s needs, and David also pays $200 directly for child care.

In plain English, David would pay Maria approximately $1,082 per month in child support, plus he continues paying $200 monthly for child care directly. This amount covers the child’s basic needs and shares the extra costs proportionally. If David’s parenting time increased to 182 overnights, his support would drop to roughly $690 per month, illustrating how significant parenting time changes are.

Another Example

Consider a different scenario: Two children, parents with lower incomes. Jenna (custodial) earns $2,500 gross monthly, and Tom (non-custodial) earns $3,200 gross monthly. Jenna has 300 overnights, Tom 65. Jenna pays $150 for child health insurance. No child care costs. Taxes: Jenna $400, Tom $600. AGIs: Jenna $2,100, Tom $2,600, combined $4,700. Basic obligation for two children at $4,700 combined is approximately $1,100 per schedule. Jenna’s share = 44.68%, Tom’s = 55.32%. Tom’s share of basic = $608.52. No parenting time adjustment because Tom has fewer than 93 overnights. Add-ons: $150 insurance, Tom’s share = 55.32% × $150 = $82.98. Final support = $608.52 + $82.98 = $691.50 per month. This example shows that even with lower incomes, support is still significant, and the calculator helps parents budget accordingly.

Benefits of Using Child Support Calculator Colorado

Using the Child Support Calculator Colorado offers substantial advantages for parents, attorneys, and mediators navigating the often stressful process of determining child support. Beyond just getting a number, this tool provides clarity and control over your financial future.

  • Instant Estimates Without Legal Fees: Instead of paying a lawyer $300 per hour just to get a rough idea of what support might be, this calculator gives you an immediate, free estimate. You can run multiple scenarios—such as what happens if you get a raise or if parenting time changes—without incurring any cost. This empowers you to enter negotiations or mediation with realistic expectations, saving both time and money.
  • Transparency in the Calculation Process: Colorado’s child support guidelines are complex, involving a schedule, deductions, and adjustments. This tool makes the process transparent by showing you how each input affects the final result. You can see exactly why the number is what it is, which reduces confusion and helps you understand the logic behind court-ordered amounts. This transparency is invaluable when explaining support to a co-parent or when preparing for a court hearing.
  • Accurate Parenting Time Adjustments: Many parents underestimate how much parenting time affects support. The calculator automatically applies Colorado’s specific adjustment formula for overnights between 93 and 182. This accuracy can prevent overpaying or under-receiving support. For example, a parent who has the child every other weekend plus one weeknight (about 104 overnights) might see a 14% reduction in their obligation, which the calculator captures precisely.
  • Helps Identify Income Imputation Issues: If one parent is voluntarily unemployed or underemployed, the calculator allows you to input an imputed income based on their earning capacity. This feature helps you see what support would be if the court imputes income, which is a common point of dispute. By testing different income levels, you can prepare arguments for or against imputation, making the tool useful for legal strategy.
  • Supports Modification Decisions: Life changes—job loss, promotion, remarriage, or a child’s medical needs—can warrant modifying a support order. The calculator lets you compare your current support with a new estimate based on changed circumstances. If the difference is significant (typically 10% or more), it may justify filing for modification. This prevents unnecessary legal action while ensuring you don’t miss a valid opportunity to adjust support.

Tips and Tricks for Best Results

To get the most accurate and useful estimate from the Child Support Calculator Colorado, follow these expert tips and avoid common pitfalls. The quality of your output depends entirely on the quality of your inputs.

Pro Tips

  • Always use monthly figures, not annual. Convert weekly or bi-weekly income by multiplying by 4.33 (for weekly) or 2.17 (for bi-weekly) to get monthly. For example, a bi-weekly paycheck of $2,000 equals $4,340 monthly. This prevents rounding errors that can throw off the calculation by tens of dollars.
  • Double-check your tax deductions. Use the IRS withholding tables or your most recent pay stub to estimate federal and state taxes. Colorado has a flat state income tax rate (currently 4.4%), so multiply your gross income by 0.044 for state tax, then add federal tax based on your bracket. Overestimating taxes lowers your AGI and reduces support, which could lead to an inaccurate estimate.
  • Include all mandatory retirement contributions, but not voluntary ones. If your employer requires a 5% pension contribution, deduct it. If you contribute extra to a 401(k) voluntarily, do not deduct it—Colorado does not allow that deduction for child support purposes. Confusing these can significantly skew results.
  • Count overnights precisely. An overnight is when the child sleeps at your residence. If the child stays from 6 PM to 8 AM, that counts as one overnight. Use a calendar to tally overnights for the entire year, including holidays and summer break. Many parents underestimate by 10–20 overnights, which can change the adjustment percentage.

Common Mistakes to Avoid