Construction Overhead Rate Calculator
ANA›Life Services Authority›National Calculator Authority›Construction Overhead Rate 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; } }
Construction Overhead Rate Calculator
Calculate your overhead rate as a percentage of direct labor or total revenue to ensure all indirect costs are covered in your project bids.
### Annual Overhead Costs
Office / Yard Rent & Utilities ($)
Business Insurance & Bonds ($)
Administrative Salaries ($)
Vehicle & Equipment Costs ($)
Marketing & Advertising ($)
Software, Tools & Office Supplies ($)
Legal, Accounting & Professional Fees ($)
Other Overhead Costs ($)
### Annual Direct Costs
Total Direct Labor Cost ($)
Total Annual Revenue ($) (for revenue-based rate)
Calculate Overhead Rate
function conCalc() { var rent = parseFloat(document.getElementById('con-rent').value) || 0; var insurance = parseFloat(document.getElementById('con-insurance').value) || 0; var admin = parseFloat(document.getElementById('con-admin').value) || 0; var vehicles = parseFloat(document.getElementById('con-vehicles').value) || 0; var marketing = parseFloat(document.getElementById('con-marketing').value) || 0; var software = parseFloat(document.getElementById('con-software').value) || 0; var legal = parseFloat(document.getElementById('con-legal').value) || 0; var other = parseFloat(document.getElementById('con-other').value) || 0; var labor = parseFloat(document.getElementById('con-labor').value) || 0; var revenue = parseFloat(document.getElementById('con-revenue').value) || 0;
var totalOverhead = rent + insurance + admin + vehicles + marketing + software + legal + other;
if (totalOverhead 0) ? (totalOverhead / labor) * 100 : null; var revenueRate = (revenue > 0) ? (totalOverhead / revenue) * 100 : null;
if (laborRate === null && revenueRate === null) { document.getElementById('con-result').style.display = 'block'; document.getElementById('con-result').innerHTML = 'Please enter Direct Labor Cost and/or Annual Revenue to calculate rates.
'; return; }
var overheadPerLaborDollar = (labor > 0) ? (totalOverhead / labor).toFixed(4) : null;
var html = '### Results '; html += ''; html += 'Total Annual Overhead$' + totalOverhead.toLocaleString('en-US', {minimumFractionDigits:2, maximumFractionDigits:2}) + '';
if (laborRate !== null) { html += 'Overhead Rate (% of Direct Labor)' + laborRate.toFixed(2) + '%'; html += 'Overhead per $1 of Direct Labor$' + overheadPerLaborDollar + ''; } if (revenueRate !== null) { html += 'Overhead Rate (% of Revenue)' + revenueRate.toFixed(2) + '%'; } if (labor > 0 && revenue > 0) { var grossProfit = revenue - labor - totalOverhead; var grossMargin = (grossProfit / revenue) * 100; html += 'Estimated Gross Profit (excl. materials)$' + grossProfit.toLocaleString('en-US', {minimumFractionDigits:2, maximumFractionDigits:2}) + ''; html += 'Gross Margin' + grossMargin.toFixed(2) + '%'; } html += '';
if (laborRate !== null) { html += 'To recover overhead, add $' + overheadPerLaborDollar + ' in overhead for every $1.00 of direct labor billed on each job.
'; }
document.getElementById('con-result').style.display = 'block'; document.getElementById('con-result').innerHTML = html; }
#### Formulas Used
Total Overhead = Rent & Utilities + Insurance & Bonds + Admin Salaries + Vehicle & Equipment + Marketing + Software & Tools + Legal & Professional + Other
Overhead Rate (Labor-Based) = (Total Overhead ÷ Total Direct Labor Cost) × 100
Overhead Rate (Revenue-Based) = (Total Overhead ÷ Total Annual Revenue) × 100
Overhead per Labor Dollar = Total Overhead ÷ Total Direct Labor Cost
Gross Profit = Revenue − Direct Labor − Total Overhead
Gross Margin = (Gross Profit ÷ Revenue) × 100
#### Assumptions & References
- Overhead costs are indirect costs not tied to a specific job — they exist regardless of project volume.
- Reference: CFMA Construction Industry Annual Financial Survey; Markup & Profit by Michael Stone.
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