.calculator-wrapper-seo {
font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
border: 1px solid #e0e0e0;
border-radius: 8px;
overflow: hidden;
background: #fff;
box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}
.calc-header {
background: #2c3e50;
color: white;
padding: 20px;
text-align: center;
}
.calc-header h2 {
margin: 0;
font-size: 24px;
}
.calc-body {
padding: 30px;
display: grid;
grid-template-columns: 1fr 1fr;
gap: 25px;
}
.input-group {
margin-bottom: 15px;
}
.input-group label {
display: block;
margin-bottom: 8px;
font-weight: 600;
color: #333;
font-size: 14px;
}
.input-group input, .input-group select {
width: 100%;
padding: 12px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 16px;
box-sizing: border-box;
transition: border-color 0.3s;
}
.input-group input:focus {
border-color: #3498db;
outline: none;
}
.input-hint {
font-size: 12px;
color: #7f8c8d;
margin-top: 4px;
}
.calc-actions {
grid-column: 1 / -1;
text-align: center;
margin-top: 10px;
}
.calc-btn {
background: #27ae60;
color: white;
border: none;
padding: 15px 40px;
font-size: 18px;
font-weight: bold;
border-radius: 5px;
cursor: pointer;
transition: background 0.3s;
}
.calc-btn:hover {
background: #219150;
}
.calc-results {
grid-column: 1 / -1;
background: #f8f9fa;
padding: 25px;
border-radius: 8px;
border-left: 5px solid #27ae60;
display: none; /* Hidden by default */
}
.result-row {
display: flex;
justify-content: space-between;
align-items: center;
margin-bottom: 12px;
font-size: 16px;
}
.result-row.main-result {
font-size: 24px;
font-weight: 800;
color: #2c3e50;
border-bottom: 2px solid #e0e0e0;
padding-bottom: 15px;
margin-bottom: 15px;
}
.result-value {
font-weight: bold;
color: #27ae60;
}
.calc-article {
padding: 30px;
background: #fff;
border-top: 1px solid #eee;
color: #444;
line-height: 1.6;
}
.calc-article h2 {
color: #2c3e50;
margin-top: 0;
}
.calc-article h3 {
color: #34495e;
margin-top: 25px;
}
.calc-article ul {
padding-left: 20px;
}
.calc-article li {
margin-bottom: 10px;
}
@media (max-width: 768px) {
.calc-body {
grid-template-columns: 1fr;
}
}
function calculateAffordability() {
// Get Input Values
var grossIncome = parseFloat(document.getElementById('grossIncome').value);
var monthlyDebt = parseFloat(document.getElementById('monthlyDebt').value) || 0;
var downPayment = parseFloat(document.getElementById('downPayment').value) || 0;
var interestRate = parseFloat(document.getElementById('interestRate').value);
var loanTermYears = parseFloat(document.getElementById('loanTerm').value);
var taxRate = parseFloat(document.getElementById('taxRate').value) || 0;
var insuranceRate = parseFloat(document.getElementById('insuranceRate').value) || 0;
var hoaFees = parseFloat(document.getElementById('hoaFees').value) || 0;
// Validation
if (isNaN(grossIncome) || isNaN(interestRate) || grossIncome <= 0) {
alert("Please enter valid positive numbers for Income and Interest Rate.");
return;
}
// Monthly calculations
var monthlyIncome = grossIncome / 12;
var annualRate = interestRate / 100;
var monthlyRate = annualRate / 12;
var numberOfPayments = loanTermYears * 12;
// DTI Ratios
var frontEndLimit = monthlyIncome * 0.28;
var backEndLimit = (monthlyIncome * 0.36) – monthlyDebt;
// Max allowable monthly housing payment (PITI + HOA)
var maxMonthlyHousing = Math.min(frontEndLimit, backEndLimit);
// Determine which rule limited the budget
var limitingRule = (frontEndLimit < backEndLimit) ? "28% (Front-End)" : "36% (Back-End)";
// Calculate max mortgage payment part
// MaxHousing = MortgagePayment + MonthlyTax + MonthlyIns + HOA
// MortgagePayment = MaxHousing – HOA – (HomePrice * TaxRate/12) – (HomePrice * InsRate/12)
// But MortgagePayment depends on HomePrice (via Principal = HomePrice – Down)
// Formula derivation:
// M = P * (r(1+r)^n) / ((1+r)^n – 1)
// var Factor = (r(1+r)^n) / ((1+r)^n – 1)
// If Rate is 0, Factor = 1/n
var mortgageFactor;
if (interestRate === 0) {
mortgageFactor = 1 / numberOfPayments;
} else {
mortgageFactor = (monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments)) / (Math.pow(1 + monthlyRate, numberOfPayments) – 1);
}
// Equation:
// MaxHousing = ( (HomePrice – Down) * Factor ) + ( HomePrice * TaxRate/1200 ) + ( HomePrice * InsRate/1200 ) + HOA
// MaxHousing – HOA = (HomePrice * Factor) – (Down * Factor) + (HomePrice * TaxMonthlyFactor) + (HomePrice * InsMonthlyFactor)
// MaxHousing – HOA + (Down * Factor) = HomePrice * (Factor + TaxMonthlyFactor + InsMonthlyFactor)
var monthlyTaxFactor = (taxRate / 100) / 12;
var monthlyInsFactor = (insuranceRate / 100) / 12;
var numerator = maxMonthlyHousing – hoaFees + (downPayment * mortgageFactor);
var denominator = mortgageFactor + monthlyTaxFactor + monthlyInsFactor;
var maxHomePrice = numerator / denominator;
// Edge case: If expenses (HOA/Taxes) are higher than max payment allowed
if (maxHomePrice < downPayment || maxHomePrice < 0) {
maxHomePrice = 0; // Cannot afford anything
}
var loanAmount = Math.max(0, maxHomePrice – downPayment);
var actualMonthlyPayment = maxMonthlyHousing;
if (maxHomePrice === 0) {
actualMonthlyPayment = 0;
}
// Display Results
document.getElementById('resHomePrice').innerHTML = formatMoney(maxHomePrice);
document.getElementById('resLoanAmount').innerHTML = formatMoney(loanAmount);
document.getElementById('resDownPayment').innerHTML = formatMoney(downPayment);
document.getElementById('resMonthlyPayment').innerHTML = formatMoney(actualMonthlyPayment);
document.getElementById('resDti').innerHTML = limitingRule;
document.getElementById('resultsArea').style.display = 'block';
}
function formatMoney(number) {
return '$' + number.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 });
}
Home Affordability Calculator
Your total income before taxes.
Car loans, student loans, credit card minimums.
30 Years
20 Years
15 Years
10 Years
Maximum Home Price:
$0.00
Loan Amount:
$0.00
Down Payment:
$0.00
Max Monthly Payment (PITI):
$0.00
DTI Ratio Used:
0%
How Much House Can I Actually Afford?
Determining your home buying budget is the most critical first step in the real estate journey. This Home Affordability Calculator uses standard lender guidelines to estimate your purchasing power based on your income, existing debts, and current interest rates.
Understanding the 28/36 Rule
Most financial advisors and mortgage lenders utilize the 28/36 rule to determine affordability:
- Front-End Ratio (28%): No more than 28% of your gross monthly income should go toward housing costs (Principal, Interest, Taxes, and Insurance).
- Back-End Ratio (36%): No more than 36% of your gross monthly income should go toward total debt, including housing costs plus car loans, student loans, and credit cards.
Our calculator analyzes both ratios and uses the lower (more conservative) number to ensure you don't overextend your finances.
Key Factors Affecting Your Buying Power
Several variables impact the maximum home price you can afford:
- Interest Rates: Even a 1% rise in interest rates can significantly reduce your buying power by increasing monthly payments.
- Down Payment: A larger down payment reduces the loan amount, lowers monthly payments, and may eliminate Private Mortgage Insurance (PMI).
- Debt-to-Income (DTI): Lowering your monthly recurring debts (like paying off a car) frees up more income for a mortgage qualification.
What are PITI Costs?
Your monthly mortgage payment isn't just the loan repayment. It typically includes PITI:
- Principal: Repayment of the loan balance.
- Interest: The cost of borrowing money.
- Taxes: Property taxes paid to your local government.
- Insurance: Homeowners insurance to protect against damage.