Service Contract Savings Calculator
ANA›Life Services Authority›National Calculator Authority›Service Contract Savings 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; } }
Service Contract Savings Calculator
Estimate whether a service contract (extended warranty) saves you money compared to paying for repairs out-of-pocket over the contract period.
Total Service Contract Cost ($)
Contract Length (Years)
Average Cost Per Repair Incident ($)
Expected Repair Incidents Per Year (without contract)
Per-Incident Deductible Under Contract ($)
Contract Coverage Rate (% of repair cost covered)
Annual Discount Rate / Opportunity Cost (%)
Calculate
function serCalc() { var resultDiv = document.getElementById('ser_result');
var contractCost = parseFloat(document.getElementById('ser_contract_cost').value); var years = parseFloat(document.getElementById('ser_contract_years').value); var avgRepair = parseFloat(document.getElementById('ser_avg_repair_cost').value); var repairFreq = parseFloat(document.getElementById('ser_repair_freq').value); var deductible = parseFloat(document.getElementById('ser_deductible').value); var coveragePct = parseFloat(document.getElementById('ser_coverage_pct').value); var discountRate = parseFloat(document.getElementById('ser_discount_rate').value);
// Validation if (isNaN(contractCost) || contractCost Please enter a valid service contract cost (≥ 0).'; return; } if (isNaN(years) || years Please enter a valid contract length (whole number ≥ 1).'; return; } if (isNaN(avgRepair) || avgRepair Please enter a valid average repair cost (≥ 0).'; return; } if (isNaN(repairFreq) || repairFreq Please enter a valid repair frequency (≥ 0).'; return; } if (isNaN(deductible) || deductible Please enter a valid deductible (≥ 0).'; return; } if (isNaN(coveragePct) || coveragePct 100) { resultDiv.innerHTML = 'Coverage rate must be between 0 and 100.'; return; } if (isNaN(discountRate) || discountRate 50) { resultDiv.innerHTML = 'Discount rate must be between 0 and 50.'; return; } if (deductible > avgRepair) { resultDiv.innerHTML = 'Deductible cannot exceed average repair cost.'; return; }
var r = discountRate / 100;
// --- Out-of-Pocket Scenario (no contract) --- // Annual out-of-pocket cost = repair frequency × average repair cost var annualOOP = repairFreq * avgRepair;
- // Present Value of out-of-pocket costs over contract period
- // PV = sum_{t=1}^{years} annualOOP / (1+r)^t
- var pvOOP = 0;
- if (r === 0) {
- pvOOP = annualOOP * years;
- } else {
- for (var t = 1; t deductible, you pay uncovered portion;
- // if uncovered portion 0)
- ? contractCost / (annuityFactor * savingsPerIncidentPerYear)
- Infinity;
// Total incidents over period var totalIncidents = repairFreq * years;
// Format helpers function fmt(v) { return v.toLocaleString('en-US', {minimumFractionDigits:2, maximumFractionDigits:2}); }
- var verdict = netSavings > 0
- ? 'The service contract SAVES you money.'
- netSavings The service contract COSTS more than paying out-of-pocket.'
- 'Break-even: the contract costs exactly the same as out-of-pocket.';
- var breakEvenText = isFinite(breakEvenFreq)
- ? fmt(breakEvenFreq) + ' incidents/year'
- 'N/A (contract never pays off at these coverage terms)';
resultDiv.innerHTML = '### Results ' + '' + 'PV of Out-of-Pocket Costs (no contract)$' + fmt(pvOOP) + '' + 'Upfront Contract Cost$' + fmt(contractCost) + '' + 'PV of Incident Costs Under Contract$' + fmt(pvWithContract) + '' + 'Total Cost With Contract$' + fmt(totalWithContract) + '' + 'Net Savings (With Contract)$' + fmt(netSavings) + '' + 'Break-Even Repair Frequency' + breakEvenText + '' + 'Expected Total Incidents Over Period' + fmt(totalIncidents) + '' + 'Out-of-Pocket Cost Per Incident (with contract)$' + fmt(oopPerIncident) + '' + '' + '' + verdict + '
'; }
#### Formulas Used
Annual Out-of-Pocket Cost (no contract): Annual OOP = Repair Frequency × Average Repair Cost
Out-of-Pocket Cost Per Incident (with contract): OOP per Incident = max(Deductible, Average Repair Cost × (1 − Coverage Rate)) You pay whichever is greater: the deductible or the uncovered portion of the repair.
Annual Cost Under Contract: Annual Contract Cost = Repair Frequency × OOP per Incident
Present Value of Costs (discounted at opportunity cost rate r over N years): PV = Σt=1N Annual Cost / (1 + r)t = Annual Cost × [(1 − (1+r)−N) / r]
Total Cost With Contract: Total = Contract Cost + PV(Annual Contract Costs)
Net Savings: Net Savings = PV(Out-of-Pocket) − Total Cost With Contract
Break-Even Repair Frequency: freqBE = Contract Cost / [Annuity Factor × (Avg Repair Cost − OOP per Incident)] where Annuity Factor = (1 − (1+r)−N) / r
#### Assumptions & References
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