Child Support Calculator

ANA›Life Services Authority›National Calculator Authority›Child Support Calculator

.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }

Child Support Calculator

Estimate monthly child support using the Income Shares Model — the standard adopted by most U.S. states. Results are estimates only; consult a family-law attorney for legal advice.

Non-Custodial Parent Gross Monthly Income ($)

Custodial Parent Gross Monthly Income ($)

Number of Children

Monthly Child Healthcare / Insurance Premium ($)

Monthly Work-Related Childcare Costs ($)

Non-Custodial Parent Overnight Visits per Year

Calculate Child Support

function chiCalc() { // --- Read inputs --- const ncpIncome = parseFloat(document.getElementById('chi-ncp-income').value); const cpIncome = parseFloat(document.getElementById('chi-cp-income').value); const numChildren = parseInt(document.getElementById('chi-children').value); const healthcare = parseFloat(document.getElementById('chi-healthcare').value) || 0; const childcare = parseFloat(document.getElementById('chi-childcare').value) || 0; const overnights = parseFloat(document.getElementById('chi-parenting-time').value) || 0;

const resultDiv = document.getElementById('chi-result');

// --- Validation --- const errors = []; if (isNaN(ncpIncome) || ncpIncome 10) errors.push("Number of children must be between 1 and 10."); if (healthcare 365) errors.push("Overnight visits must be between 0 and 365."); if ((ncpIncome + cpIncome) === 0) errors.push("Combined income cannot be zero.");

if (errors.length > 0) { resultDiv.style.display = "block"; resultDiv.innerHTML = "Please fix the following errors:" + errors.map(e => "").join("") + ""; return; }

// --------------------------------------------------------------- // INCOME SHARES MODEL // --------------------------------------------------------------- // Step 1: Combined Adjusted Gross Income const combinedIncome = ncpIncome + cpIncome;

// Step 2: Basic Child Support Obligation (BCSO) // Percentage-of-income schedule (widely used approximation): // 1 child = 17% of combined income // 2 children = 25% // 3 children = 29% // 4 children = 31% // 5 children = 33% // 6+ children = 35% const pctTable = [0, 0.17, 0.25, 0.29, 0.31, 0.33, 0.35]; const pct = pctTable[Math.min(numChildren, 6)]; const bcso = combinedIncome * pct;

// Step 3: Add extraordinary expenses (healthcare + childcare) const totalObligation = bcso + healthcare + childcare;

// Step 4: NCP's proportional share const ncpShare = ncpIncome / combinedIncome; let ncpObligation = totalObligation * ncpShare;

// Step 5: Parenting-time adjustment (shared custody credit) // Many states apply a credit when NCP has >= 92 overnights/year. // Common formula: credit = (overnights / 365) * 1.5 * ncpObligation // capped so the reduction never exceeds 50% of the base obligation. let ptCredit = 0; let ptAdjusted = ncpObligation; if (overnights >= 92) { ptCredit = (overnights / 365) * 1.5 * ncpObligation; ptCredit = Math.min(ptCredit, ncpObligation * 0.50); // cap at 50% ptAdjusted = ncpObligation - ptCredit; }

// Ensure non-negative ptAdjusted = Math.max(ptAdjusted, 0);

// --- Format helpers --- const fmt = v => "$" + v.toFixed(2).replace(/\B(?=(\d{3})+(?!\d))/g, ","); const fmtPct = v => (v * 100).toFixed(1) + "%";

// --- Output --- resultDiv.style.display = "block"; resultDiv.innerHTML = ` ### ⚖️ Child Support Estimate

Combined Gross Monthly Income ${fmt(combinedIncome)}

Income Share % for ${numChildren} child(ren) ${fmtPct(pct)}

Basic Child Support Obligation (BCSO) ${fmt(bcso)}

Total Support Obligation ${fmt(totalObligation)}

NCP Income Share (${fmtPct(ncpShare)}) ${fmt(ncpObligation)}

${overnights >= 92 ? `

− Parenting-Time Credit (${overnights} nights) − ${fmt(ptCredit)} :

Parenting-Time Credit (requires ≥ 92 nights) $0.00 `}

💰 Estimated Monthly Child Support (NCP pays) ${fmt(ptAdjusted)}

Annual obligation: ${fmt(ptAdjusted * 12)}  |  NCP income share: ${fmtPct(ncpShare)}

⚠️ This is an estimate. Actual orders depend on your state's specific guidelines, deductions, and judicial discretion.

`; }

#### Formula (Income Shares Model)

1. Combined Income = NCP Gross Income + CP Gross Income 2. Basic Child Support Obligation (BCSO)    BCSO = Combined Income × Income Share %    (1 child = 17%, 2 = 25%, 3 = 29%, 4 = 31%, 5 = 33%, 6+ = 35%) 3. Total Obligation = BCSO + Healthcare Premium + Work-Related Childcare 4. NCP's Share = Total Obligation × (NCP Income ÷ Combined Income) 5. Parenting-Time Credit (if NCP has ≥ 92 overnights/year):    Credit = (Overnights ÷ 365) × 1.5 × NCP's Share  [capped at 50% of NCP's Share] 6. Final Order = NCP's Share − Parenting-Time Credit

#### Assumptions & References

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References

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