HOA Fee Budget Calculator
ANA›Life Services Authority›National Calculator Authority›HOA Fee Budget 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; } }
HOA Fee Budget Calculator
Estimate monthly HOA fees per unit based on your community's annual operating budget, reserve fund contributions, and number of units.
Number of Units
Annual Operating Budget ($)
Annual Reserve Fund Contribution ($)
Annual Special Assessments ($) (optional)
Annual Non-Fee Income ($) (rental income, fines, etc.)
Contingency Buffer (%)
Calculate
function hoaCalc() { var units = parseFloat(document.getElementById('hoa-units').value); var operating = parseFloat(document.getElementById('hoa-operating').value) || 0; var reserve = parseFloat(document.getElementById('hoa-reserve').value) || 0; var special = parseFloat(document.getElementById('hoa-special').value) || 0; var income = parseFloat(document.getElementById('hoa-income').value) || 0; var contingency = parseFloat(document.getElementById('hoa-contingency').value); var resultDiv = document.getElementById('hoa-result');
// --- Validation --- if (isNaN(units) || units ⚠ Please enter a valid whole number of units (minimum 1).'; return; } if (operating ⚠ Dollar amounts cannot be negative.'; return; } if (isNaN(contingency) || contingency 50) { resultDiv.style.display = 'block'; resultDiv.innerHTML = '⚠ Contingency buffer must be between 0% and 50%.'; return; }
// --- Core Formula --- // Total Annual Need = (Operating + Reserve + Special) × (1 + Contingency%) − Non-Fee Income var grossNeed = (operating + reserve + special) * (1 + contingency / 100); var netAnnualNeed = Math.max(0, grossNeed - income); var annualPerUnit = netAnnualNeed / units; var monthlyPerUnit = annualPerUnit / 12;
// Breakdown components per unit per month var opPerUnit = (operating / units) / 12; var resPerUnit = (reserve / units) / 12; var spPerUnit = (special / units) / 12; var contribAmount = monthlyPerUnit - opPerUnit - resPerUnit - spPerUnit; var incomeOffset = (income / units) / 12;
var fmt = function(n) { return '$' + n.toFixed(2).replace(/\B(?=(\d{3})+(?!\d))/g, ','); }; var fmtK = function(n) { return '$' + n.toFixed(0).replace(/\B(?=(\d{3})+(?!\d))/g, ','); };
resultDiv.style.display = 'block'; resultDiv.innerHTML = '### Results ' + '' + 'Monthly HOA Fee per Unit' + '' + fmt(monthlyPerUnit) + '' + 'Annual Fee per Unit' + '' + fmt(annualPerUnit) + '' + 'Total Annual Revenue Needed' + '' + fmtK(netAnnualNeed) + '' + '↳ Operating Budget' + '' + fmtK(operating) + '' + '↳ Reserve Contribution' + '' + fmtK(reserve) + '' + '↳ Special Assessments' + '' + fmtK(special) + '' + '↳ Contingency (' + contingency + '%)' + '' + fmtK((operating + reserve + special) * contingency / 100) + '' + '↳ Less: Non-Fee Income' + '−' + fmtK(income) + '' + 'Monthly Fee Breakdown per Unit' + 'Operating' + '' + fmt(opPerUnit) + '' + 'Reserve' + '' + fmt(resPerUnit) + '' + 'Special Assessment' + '' + fmt(spPerUnit) + '' + 'Contingency Buffer' + '' + fmt(contribAmount + incomeOffset) + '' + 'Less: Income Offset' + '−' + fmt(incomeOffset) + '' + ''; }
#### Formula
Step 1 — Gross Annual Need: Gross Need = (Operating Budget + Reserve Contribution + Special Assessments) × (1 + Contingency% / 100)
Step 2 — Net Annual Need: Net Annual Need = max(0, Gross Need − Non-Fee Income)
Step 3 — Monthly Fee per Unit: Monthly HOA Fee = Net Annual Need ÷ Number of Units ÷ 12
#### Assumptions & References
- All units are assumed to carry an equal share of the budget. Weighted allocation (by square footage or unit type) is not modeled here.
- The reserve fund contribution follows the CAI (Community Associations Institute) recommendation of funding 70–100% of the reserve study's required annual contribution.
- A contingency buffer of 10% is the industry standard to cover unexpected expenses; adjust as needed per your reserve study.
- Non-fee income may include laundry revenue, parking fees, late fees, and interest on reserves — reducing the fee burden on owners.
- References: CAI Best Practices for Reserve Studies; Davis-Stirling Common Interest Development Act (California Civil Code §5550 for reserve funding); GAAP for Common Interest Realty Associations (AICPA).
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