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Illinois flag2026Rank #6

Illinois Child Support 2026

Income shares — about $183/mo on $5,000 / $3,000 monthly gross · 2 children · Parent A 70% custody · Parent B pays. Income-shares states may tie on this hub’s simplified schedule.

By Sammy S. · Founder · AuthorUpdated for 2026

Income shares
Model
$183
Monthly
$2,196
Annual
#6
Dense rank

Illinois child support at a glance

Guideline model

Income shares

Monthly estimate

$183

Annual estimate

$2,196

Dense rank

#6

Rank #6 on $5,000 / $3,000 monthly gross · 2 children · Parent A 70% custody · Parent B pays. Citation: 750 ILCS 5/505.

Open Illinois child support calculator →

Key takeaways — Illinois child support

  • Illinois ranks #6 at ~$183/mo ($2,196/yr) on $5,000 / $3,000 monthly gross · 2 children · Parent A 70% custody · Parent B pays.
  • Income shares. 750 ILCS 5/505.
  • Income-shares rows share a simplified schedule here — Illinois may tie with other jurisdictions near this monthly amount.
  • Not legal advice — use /child-support-calculator/illinois and Illinois’s official calculator.
Compare with another state →

Income-shares states on this hub share a simplified schedule — many jurisdictions tie on the locked vignette. Personalize with the state calculator and official worksheets.

Illinois vs similar vignette estimates

States closest to Illinois ($183/mo) on $5,000 / $3,000 monthly gross · 2 children · Parent A 70% custody · Parent B pays.

StateModelMonthlyvs ILCompare
IllinoisIncome shares$183—This page
AlabamaIncome shares$183tieCompare
ArizonaIncome shares$183tieCompare
ArkansasIncome shares$183tieCompare
CaliforniaIncome shares$183tieCompare

Illinois guideline context

Illinois child support estimate in 2026

On $5,000 / $3,000 monthly gross · 2 children · Parent A 70% custody · Parent B pays, our engine estimates about $183 per month ($2,196 annually) for Illinois.

Illinois uses an income-shares guideline model (NCSL). This hub’s engine uses a simplified shared income-shares schedule — many income-shares states therefore tie on the locked vignette. Illinois uses income shares model effective 2017. Estimates typically vary by ±10%.

Compared with Texas (~$750) and California (~$183) on the same vignette, Illinois sits at dense rank #6.

Illinois: income-shares guidelines (simplified hub schedule)

Illinois follows income shares (or a Melson/hybrid variant routed as income shares). This ranking hub uses a simplified shared schedule so we do not invent official table cells; Illinois therefore may match other income-shares states on the vignette.

Illinois uses income shares model effective 2017. Estimates typically vary by ±10%.

Deep-link to the interactive calculator: /child-support-calculator/illinois.

Personalize beyond the ranking vignette

Change Parent A/B incomes, custody percent, children, and add-ons on the Illinois calculator page. Rankings stay locked to the vignette for apples-to-apples comparison.

Official agency tools remain authoritative when they diverge from our educational estimate.

What this profile does not include

Case-specific deviations, imputed income, and multi-family credits

Full official income-shares lookup tables unique to each state

Health insurance, childcare, and extraordinary medical add-ons (unless entered in the calculator)

Interstate UIFSA enforcement details and arrears

Tax dependency / child tax credit interactions (see related tools)

Myths vs facts

Myth: Every state’s income-shares table produces a unique number on this page.

Fact: This educational engine uses one simplified income-shares schedule for those states, so many jurisdictions intentionally tie on the locked vignette. Official state worksheets differ.

Myth: A higher rank means that state always orders more support.

Fact: Rank #1 is only the highest estimate on this fixed vignette. Different incomes, custody, or children can reorder states — especially once real income-shares tables are used.

Myth: Percentage-of-income and income-shares always yield similar results.

Fact: On this vignette, percentage-of-income states sit hundreds of dollars above the income-shares cluster. Models allocate obligation differently; NCSL documents both approaches.

Myth: This estimate is a court order.

Fact: It is an educational guideline estimate. Judges apply worksheets, deviations, and evidence. Use your state’s official calculator or attorney.

Glossary

Income shares
Guideline model (most states) that estimates the child’s share of combined parental income, then splits it by each parent’s income share. Our hub uses a simplified shared schedule for these states.
Percentage of income
Guideline model that applies a percentage (flat or varying) of the obligor’s income — used here for AK, MS, NV, ND, TX, and WI with state-specific engine math.
Melson Formula
Income-shares variant (DE, HI, MT) with self-support reserves. Routed as income-shares in this engine with accuracy notes — official Melson worksheets differ.
Dense ranking
States with the same monthly estimate share one rank; the next distinct amount gets the next integer (e.g. two #1s, then #2).
Obligor / paying parent
The parent ordered to pay support. This vignette sets Parent B as the paying parent with $3,000 monthly gross.

Who this Illinois profile helps

Useful if…

  • •Illinois parents orientation-shopping guideline ballparks
  • •Comparisons of Illinois vs percentage-of-income or income-shares peers
  • •Readers checking NCSL model labels before opening official worksheets

Use official tools if…

  • •Active court cases and negotiated settlements
  • •Melson or complex shared-custody worksheets not fully modeled here
  • •Relying on income-shares ties as if official tables matched

Illinois checklist

  1. 1Open /child-support-calculator/illinois with your incomes.
  2. 2Read Illinois’s official guideline or calculator.
  3. 3Note whether the model is income shares or percentage of income.
  4. 4Treat hub dollars as educational estimates only.

Illinois paying-parent income ladder

Parent A stays at $5,000 gross / 70% custody; Parent B gross varies. Amounts are calculated from our engine.

Parent B gross / moMonthly estimateAnnual
$2,000$0$0
$3,000$183$2,196
$5,000$536$6,432
$8,000$701.54$8,418.46

Compare Illinois with another state

Compare any two states

Guideline estimates on $5,000 / $3,000 monthly gross · 2 children · Parent A 70% custody · Parent B pays.

vs Texasvs Californiavs New Yorkvs Florida

Related states

Alabama

Income shares

$183/mo

Compare vs AL →
Arizona

Income shares

$183/mo

Compare vs AZ →
Arkansas

Income shares

$183/mo

Compare vs AR →
California

Income shares

$183/mo

Compare vs CA →

Illinois child support FAQs

Income shares. 750 ILCS 5/505 Official resource: https://hfs.illinois.gov/childsupport/parents/estimator.html.

About $183/mo ($2,196/yr) on $5,000 / $3,000 monthly gross · 2 children · Parent A 70% custody · Parent B pays — dense rank #6. Amounts are calculated from our engine, not hand-typed copy.

Income-shares rows share a simplified schedule in this hub, so many states show ~$183/mo. Use /child-support-calculator/illinois and Illinois’s official worksheet for case-specific results.

Use /child-support-calculator/illinois and, when available, https://hfs.illinois.gov/childsupport/parents/estimator.html.

Not necessarily. It is an educational engine estimate on fixed vignette inputs. Courts use official worksheets, evidence, and deviations.

No. Income-shares rows use the engine’s simplified shared schedule. We disclose ties instead of fabricating official guideline cells.

Related topics

Child support calculator

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Center-based infant and preschool costs

Child tax credit calculator

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DTI calculator

Debt-to-income with support payments

State tax compare

Side-by-side state income tax

Illinois child support calculatorChild support calculator (all states)All state child support rankingsIllinois official resource