Find out exactly how much home fits into your monthly budget.
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Estimated Buying Power
$0
Monthly Payment (PITI)$0
Total Loan Amount$0
How Much House Can I Afford?
Determining your home buying power is the most critical step in the real estate journey. While a bank might pre-approve you for a high amount, the real question is how much you can comfortably afford while maintaining your lifestyle. Most financial experts recommend the 28/36 Rule. This rule suggests that your mortgage payment shouldn't exceed 28% of your gross monthly income, and your total debt payments shouldn't exceed 36%.
Understanding the Key Factors
This calculator looks beyond just the sticker price of the home. It incorporates several vital metrics:
Gross Annual Income: Your total earnings before taxes.
Debt-to-Income (DTI) Ratio: The percentage of your income that goes toward paying debts. Lenders typically prefer a DTI below 36-43%.
Down Payment: The cash you bring to the table. A higher down payment reduces your monthly loan payment and can eliminate Private Mortgage Insurance (PMI).
PITI: This stands for Principal, Interest, Taxes, and Insurance. Our calculator estimates the full "out-of-pocket" monthly cost.
Example Affordability Scenario
Let's look at a realistic example. Imagine a couple earning $100,000 per year with $500 in monthly car loans and student debt. They have $60,000 saved for a down payment. At a 6.5% interest rate on a 30-year term:
Monthly Gross Income: $8,333
Max Debt Allowance (36%): $3,000
Available for Mortgage (after $500 debt): $2,500
Accounting for Taxes/Insurance: The couple could likely afford a home priced around $415,000.
Tips to Increase Your Buying Power
If the results are lower than you hoped, consider these strategies:
1. Pay down existing debt: Reducing your monthly credit card or car payments directly increases your mortgage budget.
2. Improve your credit score: A higher score can secure a lower interest rate, significantly decreasing your monthly interest cost.
3. Save a larger down payment: This reduces the loan-to-value ratio and can save you thousands in interest over the life of the loan.
function calculateHomeAffordability() {
var annualIncome = parseFloat(document.getElementById('afford_annualIncome').value);
var downPayment = parseFloat(document.getElementById('afford_downPayment').value);
var monthlyDebt = parseFloat(document.getElementById('afford_monthlyDebt').value);
var annualRate = parseFloat(document.getElementById('afford_interestRate').value);
var years = parseInt(document.getElementById('afford_loanTerm').value);
var taxRate = parseFloat(document.getElementById('afford_propertyTax').value) / 100;
if (isNaN(annualIncome) || isNaN(downPayment) || isNaN(annualRate)) {
alert("Please enter valid numerical values.");
return;
}
// 1. Calculate Monthly Gross Income
var monthlyGross = annualIncome / 12;
// 2. Determine Max Monthly PITI (Principal, Interest, Taxes, Insurance)
// Standard rule: 36% of gross income minus existing debts
var maxPITI = (monthlyGross * 0.36) – monthlyDebt;
if (maxPITI Monthly Mortgage Factor
// var T = taxRate/12
// var I = 0.0012 / 12 (roughly 0.12% annual for insurance)
// maxPITI = (H – DP)*M + H*T + H*I
// maxPITI = H*M – DP*M + H*T + H*I
// maxPITI + DP*M = H(M + T + I)
// H = (maxPITI + DP*M) / (M + T + I)
var monthlyRate = (annualRate / 100) / 12;
var numberOfPayments = years * 12;
var monthlyMortgageFactor = (monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments)) / (Math.pow(1 + monthlyRate, numberOfPayments) – 1);
var monthlyTaxFactor = taxRate / 12;
var monthlyInsFactor = 0.0015 / 12; // Standard estimation for insurance 0.15%
var estimatedHomePrice = (maxPITI + (downPayment * monthlyMortgageFactor)) / (monthlyMortgageFactor + monthlyTaxFactor + monthlyInsFactor);
var loanAmount = estimatedHomePrice – downPayment;
if (loanAmount < 0) {
// If downpayment is more than the home price based on income
estimatedHomePrice = downPayment;
loanAmount = 0;
}
// Update UI
document.getElementById('afford_result').style.display = "block";
document.getElementById('afford_totalPrice').innerText = "$" + Math.round(estimatedHomePrice).toLocaleString();
document.getElementById('afford_monthlyPayment').innerText = "$" + Math.round(maxPITI).toLocaleString();
document.getElementById('afford_loanAmount').innerText = "$" + Math.round(loanAmount).toLocaleString();
}