How to Calculate Discount Interest Rate

Home Affordability Calculator

Your Estimated Buying Power

Estimated Home Price: $0

Max Monthly P&I: $0

Total Loan Amount: $0

*This estimate uses a 36% Debt-to-Income (DTI) ratio. It does not include property taxes, PMI, or home insurance.

function calculateAffordability() { var annualIncome = parseFloat(document.getElementById('annualIncome').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 loanTerm = parseInt(document.getElementById('loanTerm').value); if (isNaN(annualIncome) || isNaN(interestRate) || annualIncome <= 0 || interestRate <= 0) { alert("Please enter valid positive numbers for income and interest rate."); return; } // Standard DTI Rule (36% for conservative affordability) var monthlyGrossIncome = annualIncome / 12; var maxMonthlyBudget = monthlyGrossIncome * 0.36; var maxPIPayment = maxMonthlyBudget – monthlyDebt; if (maxPIPayment <= 0) { alert("Your monthly debts exceed 36% of your gross income. Based on traditional metrics, a mortgage might be difficult to secure at this time."); return; } // Mortgage Formula: Loan Amount = P [ i(1 + i)^n ] / [ (1 + i)^n – 1] // We need to reverse it to find the Principal (P) var monthlyRate = (interestRate / 100) / 12; var numberOfPayments = loanTerm * 12; var loanAmount = maxPIPayment * (Math.pow(1 + monthlyRate, numberOfPayments) – 1) / (monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments)); var totalHomePrice = loanAmount + downPayment; document.getElementById('totalHomePrice').innerText = '$' + Math.round(totalHomePrice).toLocaleString(); document.getElementById('monthlyMortgagePayment').innerText = '$' + Math.round(maxPIPayment).toLocaleString(); document.getElementById('totalLoanAmount').innerText = '$' + Math.round(loanAmount).toLocaleString(); document.getElementById('affordabilityResult').style.display = 'block'; }

How Much Home Can You Actually Afford?

Buying a home is the largest financial decision most people ever make. While banks often use a specific set of ratios to determine how much they will lend you, "affordability" is personal. Our Home Affordability Calculator helps you understand your maximum purchase price based on the 36% Debt-to-Income (DTI) rule.

Understanding the Key Factors

• Gross Annual Income: This is your total income before taxes. Lenders use this figure as the baseline for your repayment capacity.
• Debt-to-Income (DTI) Ratio: Most lenders prefer a total DTI of 36% to 43%. This includes your new mortgage payment plus existing debts like car loans, student loans, and credit card minimums.
• Interest Rates: A 1% change in interest rates can impact your buying power by as much as 10%. Lower rates allow you to borrow more for the same monthly payment.
• Down Payment: The more cash you bring to the table, the higher the home price you can afford, and the lower your monthly loan balance will be.

Affordability Comparison Examples

Annual Income	Monthly Debt	Max Price (approx.)
$60,000	$300	$230,000
$100,000	$500	$425,000
$150,000	$800	$650,000

3 Tips to Increase Your Buying Power

1. Pay Down Existing Debt: Every $100 reduction in monthly debt payments can significantly increase the loan amount you qualify for.
2. Improve Your Credit Score: Higher credit scores qualify you for lower interest rates, which directly lowers your monthly payment and increases affordability.
3. Save for a Larger Down Payment: Putting 20% down avoids Private Mortgage Insurance (PMI), saving you hundreds of dollars every month that can instead go toward the principal.