Home Refinance Rates Calculator

Home Refinance Rates Calculator – Estimate Your Savings :root { –primary-color: #004a99; –success-color: #28a745; –background-color: #f8f9fa; –text-color: #333; –border-color: #ddd; –card-background: #fff; –shadow: 0 2px 5px rgba(0,0,0,0.1); } body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: var(–background-color); color: var(–text-color); line-height: 1.6; margin: 0; padding: 0; display: flex; flex-direction: column; align-items: center; padding-top: 20px; padding-bottom: 40px; } .container { width: 100%; max-width: 960px; background-color: var(–card-background); padding: 30px; border-radius: 8px; box-shadow: var(–shadow); margin: 0 auto; box-sizing: border-box; } h1, h2, h3 { color: var(–primary-color); text-align: center; margin-bottom: 20px; } h1 { font-size: 2.2em; margin-bottom: 30px; } h2 { font-size: 1.8em; border-bottom: 2px solid var(–primary-color); padding-bottom: 10px; margin-top: 40px; } h3 { font-size: 1.4em; margin-top: 30px; margin-bottom: 15px; 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Home Refinance Rates Calculator

Estimate your potential monthly savings and total interest reduction by refinancing your home loan. Compare your current mortgage details with new refinance rate options.

Enter the remaining balance of your current mortgage.
Enter your current annual mortgage interest rate.
Enter the remaining years on your current mortgage.
Enter the interest rate you expect to get with a refinance.
Enter the desired remaining years for your new mortgage.
Include all closing costs, appraisal fees, etc.

Your Refinance Savings Summary

$0.00
$0.00
Current Monthly Payment: $0.00
New Refinance Monthly Payment: $0.00
Total Interest Paid (Current): $0.00
Total Interest Paid (Refinance): $0.00
Total Interest Saved: $0.00
Break-Even Point (Months): N/A
Calculations based on standard amortization formulas. Monthly payments are estimated using the loan balance, interest rate, and term. Total interest is the sum of all payments minus the principal. Savings are the difference in total interest paid, adjusted for refinance fees. Break-even is calculated by dividing refinance fees by the monthly payment savings.

Loan Amortization Comparison

Loan Amortization Schedule Comparison
Year Current Balance Refinance Balance Current Interest Paid Refinance Interest Paid
Enter details and click "Calculate Savings" to see the schedule.

What is a Home Refinance Rates Calculator?

{primary_keyword} is a valuable online tool designed to help homeowners understand the potential financial benefits of refinancing their existing mortgage. It allows users to input their current loan details (balance, interest rate, remaining term) and compare them against potential new loan offers (new interest rate, new term, associated fees). By doing so, the calculator estimates changes in monthly payments, total interest paid over the life of the loan, and the time it takes for the savings to offset the refinance costs. This home refinance rates calculator is crucial for making informed decisions about whether pursuing a mortgage refinance is a financially sound move.

Who should use a home refinance rates calculator?

  • Homeowners looking to lower their monthly mortgage payments.
  • Individuals seeking to reduce the total interest paid over the life of their loan.
  • Borrowers who want to shorten their mortgage term and pay off their home faster.
  • Those interested in tapping into their home equity for cash-out refinancing.
  • Anyone comparing different refinance offers from various lenders.

Common Misconceptions about Refinancing:

  • Misconception: Refinancing always lowers your monthly payment.
    Reality: While often the goal, refinancing into a shorter term or taking cash out can sometimes increase monthly payments. The calculator helps clarify this.
  • Misconception: Refinancing is only beneficial when interest rates drop significantly.
    Reality: Even small rate drops can lead to substantial savings over time, especially on large loan balances. Also, refinancing can be beneficial for changing loan terms or accessing equity.
  • Misconception: Refinance fees are always too high to justify the savings.
    Reality: The calculator helps determine the break-even point, showing how long it takes for savings to cover costs. For many, the long-term benefits outweigh the upfront fees.

Home Refinance Rates Calculator Formula and Mathematical Explanation

The core of the {primary_keyword} lies in calculating mortgage payments and total interest using the standard amortization formula. We then compare these figures before and after the proposed refinance.

1. Calculating Monthly Mortgage Payment (P&I)

The formula for calculating the monthly payment (M) for a loan is:

M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1]

Where:

  • M = Monthly Payment (Principal & Interest)
  • P = Principal Loan Amount (Current Loan Balance)
  • i = Monthly Interest Rate (Annual Rate / 12)
  • n = Total Number of Payments (Loan Term in Years * 12)

2. Calculating Total Interest Paid

Total Interest Paid = (Monthly Payment * Total Number of Payments) – Principal Loan Amount

Total Interest = (M * n) - P

3. Calculating Refinance Impact

New Monthly Payment: Calculated using the same formula as above, but with the new refinance interest rate and term. Note: If cash-out is involved, P increases. If the loan term is shortened, n decreases.

Total Interest Paid (Refinance): Calculated using the new monthly payment and new term.

Monthly Payment Difference: Current Monthly Payment – New Monthly Payment

Total Interest Saved: Total Interest Paid (Current) – Total Interest Paid (Refinance)

Break-Even Point (Months): Estimated Refinance Fees / Monthly Payment Difference

This calculation assumes the refinance fees are rolled into the new loan balance or paid upfront, and that the interest rate remains fixed for the entire loan term.

Variables Table:

Variable Meaning Unit Typical Range
P (Principal) Loan Balance Currency ($) $50,000 – $1,000,000+
Annual Interest Rate Stated yearly interest rate % 2.0% – 8.0%+
Loan Term Duration of the loan Years 10 – 30 years
i (Monthly Rate) Interest rate per month Decimal (Rate/12) 0.00167 – 0.00667+
n (Number of Payments) Total number of monthly payments Months 120 – 360+
M (Monthly Payment) Principal & Interest payment Currency ($) Varies significantly
Refinance Fees Costs associated with closing the refinance Currency ($) $1,000 – $10,000+

Practical Examples (Real-World Use Cases)

Let's explore how the {primary_keyword} can be used with realistic scenarios:

Example 1: Lowering Monthly Payments

Scenario: Sarah has a remaining balance of $200,000 on her mortgage with 20 years left. Her current interest rate is 5.0%. She sees rates have dropped and can potentially refinance to a 30-year loan at 3.5% with estimated fees of $4,000.

Inputs:

  • Current Loan Balance: $200,000
  • Current Interest Rate: 5.0%
  • Current Loan Term: 20 years
  • New Refinance Interest Rate: 3.5%
  • New Refinance Loan Term: 30 years
  • Refinance Fees: $4,000

Calculator Outputs (Estimated):

  • Current Monthly Payment: ~$1,321.51
  • New Refinance Monthly Payment: ~$898.09
  • Monthly Payment Difference: ~$423.42
  • Total Interest Paid (Current): ~$117,162.40
  • Total Interest Paid (Refinance): ~$123,292.40 (Note: Higher total interest due to longer term)
  • Total Interest Saved: -$6,130.00 (Negative savings in total interest)
  • Break-Even Point (Months): ~9.45 months ($4,000 / $423.42)

Financial Interpretation: Sarah would save approximately $423 per month by refinancing. Although her total interest paid over the life of the loan increases due to the longer 30-year term, the refinance costs are recouped in just over 9 months. This strategy is excellent if her priority is immediate cash flow improvement, perhaps to handle other financial goals or unexpected expenses.

Example 2: Paying Off Faster & Saving Interest

Scenario: John owes $300,000 on his mortgage with 25 years remaining at 4.0%. Rates have dropped, and he can refinance to a 15-year loan at 3.0% with fees of $5,000.

Inputs:

  • Current Loan Balance: $300,000
  • Current Interest Rate: 4.0%
  • Current Loan Term: 25 years
  • New Refinance Interest Rate: 3.0%
  • New Refinance Loan Term: 15 years
  • Refinance Fees: $5,000

Calculator Outputs (Estimated):

  • Current Monthly Payment: ~$1,593.70
  • New Refinance Monthly Payment: ~$2,144.75
  • Monthly Payment Difference: -$551.05 (Higher payment)
  • Total Interest Paid (Current): ~$178,110.00
  • Total Interest Paid (Refinance): ~$86,055.00
  • Total Interest Saved: ~$92,055.00
  • Break-Even Point (Months): N/A (Payment increases, savings realized over time)

Financial Interpretation: John's monthly payment increases by about $551. However, by refinancing to a shorter term and a lower rate, he will save over $92,000 in interest and pay off his home 10 years sooner. This is a great strategy for homeowners who can afford the higher monthly payment and prioritize long-term savings and faster debt freedom. The {primary_keyword} highlights this trade-off clearly.

How to Use This Home Refinance Rates Calculator

Using our {primary_keyword} is straightforward. Follow these steps to get your personalized savings estimate:

  1. Enter Current Loan Details: Input your current mortgage's remaining balance, your current annual interest rate, and the number of years left on the loan.
  2. Enter Refinance Offer Details: Input the interest rate you've been offered for a refinance, the desired new loan term (in years), and an estimate of all associated closing costs and fees.
  3. Calculate: Click the "Calculate Savings" button.

How to Read the Results:

  • Monthly Payment Difference: A positive number indicates savings; a negative number means your payment will increase.
  • Estimated Total Savings: This shows the projected reduction in total interest paid over the life of the loan, factoring in the refinance fees. A positive number is ideal.
  • Current/New Monthly Payment: Compare these to understand the immediate impact on your budget.
  • Total Interest Paid (Current/Refinance): See the long-term interest cost difference.
  • Break-Even Point (Months): This is crucial. It tells you how many months it will take for your monthly savings to cover the refinance fees. If you plan to sell or move before this point, refinancing might not be worthwhile.
  • Amortization Chart & Table: Visualize how your loan balance decreases over time under both scenarios and compare the interest paid year-over-year.

Decision-Making Guidance:

  • If the monthly payment difference is significant and positive, and the break-even point is within a reasonable timeframe (e.g., less than 2-3 years), refinancing is likely a good option.
  • If your primary goal is to pay off the mortgage faster and you can afford a higher monthly payment, focus on the total interest saved and the shorter term.
  • Always consider your long-term plans for the home. If you intend to move soon, a shorter break-even period is more important.
  • Remember that the calculator provides estimates. Actual rates and fees may vary. Consult with lenders for precise quotes.

Key Factors That Affect Home Refinance Rates Results

Several elements influence the outcome of a refinance, impacting the rates you get and the potential savings:

  1. Market Interest Rates: This is the most significant external factor. When overall market rates (like those set by the Federal Reserve or influenced by bond yields) fall, refinance rates tend to decrease, making it more attractive to refinance. Conversely, rising rates make refinancing less appealing.
  2. Your Credit Score: Lenders use your credit score to assess risk. Higher credit scores (typically 740+) qualify for the lowest interest rates. A lower score might mean higher rates or even denial of the refinance application. Improving your credit before applying can yield better results.
  3. Loan-to-Value (LTV) Ratio: This is the ratio of your outstanding loan balance to your home's current appraised value. Lenders prefer lower LTV ratios (meaning you have more equity). A lower LTV (e.g., below 80%) often unlocks better interest rates and avoids Private Mortgage Insurance (PMI) if applicable. Refinancing with significant equity is generally more favorable.
  4. Refinance Fees and Closing Costs: These upfront costs (appraisal, title insurance, origination fees, etc.) directly impact the break-even point. High fees can negate the benefit of a slightly lower interest rate. Our calculator helps quantify this trade-off. Some "no-cost" refinances exist, but these typically involve a higher interest rate.
  5. Loan Term: Choosing a shorter loan term (e.g., 15 or 20 years) usually comes with a lower interest rate compared to a longer term (e.g., 30 years). While it increases the monthly payment, it significantly reduces the total interest paid over the life of the loan and helps you build equity faster.
  6. Economic Conditions and Lender Policies: Broader economic factors like inflation, employment rates, and overall housing market stability influence lender confidence and pricing. Additionally, each lender has its own underwriting criteria and risk appetite, meaning rates can vary between institutions even for borrowers with identical financial profiles. Shopping around is essential.
  7. Cash-Out vs. Rate-and-Term Refinance: A rate-and-term refinance aims to get a better rate or change the loan term. A cash-out refinance allows you to borrow more than your current balance, taking the difference in cash. Cash-out refinances often come with slightly higher interest rates than rate-and-term options due to the increased risk for the lender.

Frequently Asked Questions (FAQ)

Q1: How often should I check my refinance options?

A: It's wise to monitor market interest rates and your financial situation periodically (e.g., every 6-12 months). Significant drops in rates (0.5% or more) or major life changes (improved credit, increased income) are good triggers to re-evaluate refinancing.

Q2: What is the difference between a rate-and-term refinance and a cash-out refinance?

A: A rate-and-term refinance replaces your existing mortgage with a new one, typically to secure a lower interest rate or change the loan term. A cash-out refinance also replaces your mortgage but allows you to borrow more than you currently owe, receiving the difference in cash for purposes like home improvements or debt consolidation.

Q3: Can refinancing help if my income has decreased?

A: Yes, if you can secure a lower interest rate and/or a longer loan term, refinancing can reduce your monthly payments, making them more manageable. However, lenders will still assess your ability to repay based on your current income and debt-to-income ratio.

Q4: What are common refinance fees I should expect?

A: Typical fees include appraisal fees, credit report fees, title search and insurance, origination fees, recording fees, and sometimes points (prepaid interest). These can range from 2% to 6% of the loan amount.

Q5: How does my credit score affect my refinance rate?

A: A higher credit score indicates lower risk to lenders, qualifying you for lower interest rates. Borrowers with excellent credit (740+) typically get the best rates, while those with lower scores may face higher rates or be denied.

Q6: Is it worth refinancing if I only plan to stay in my home for 2 more years?

A: You need to compare the total refinance fees against the monthly savings. Calculate the break-even point. If the break-even point is less than 2 years, it might be worthwhile. Otherwise, the costs might outweigh the short-term benefits.

Q7: Can I refinance if my home value has decreased?

A: It can be more challenging. Lenders look at the Loan-to-Value (LTV) ratio. If your home value has dropped significantly, your LTV might be too high for favorable refinance terms, or you might not qualify at all.

Q8: What is the difference between the calculator's "Total Interest Saved" and "Estimated Total Savings"?

A: "Total Interest Saved" is the raw difference in interest paid between the old and new loan terms. "Estimated Total Savings" (the main result) typically subtracts the refinance fees from the "Total Interest Saved" to give you the net financial benefit after accounting for costs.

Related Tools and Internal Resources

var chartInstance = null; // Global variable to hold chart instance function formatCurrency(amount) { return "$" + amount.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,'); } function formatNumber(num) { return num.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,'); } function calculateMonthlyPayment(principal, annualRate, years) { if (principal <= 0 || annualRate < 0 || years <= 0) return 0; var monthlyRate = annualRate / 100 / 12; var numberOfPayments = years * 12; if (monthlyRate === 0) { return principal / numberOfPayments; } var numerator = principal * monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments); var denominator = Math.pow(1 + monthlyRate, numberOfPayments) – 1; return numerator / denominator; } function calculateTotalInterest(principal, annualRate, years) { var monthlyPayment = calculateMonthlyPayment(principal, annualRate, years); var numberOfPayments = years * 12; var totalPayments = monthlyPayment * numberOfPayments; return totalPayments – principal; } function validateInput(id, min, max, isRequired = true) { var input = document.getElementById(id); var errorSpan = document.getElementById(id + 'Error'); var value = parseFloat(input.value); var isValid = true; errorSpan.style.display = 'none'; input.style.borderColor = 'var(–border-color)'; if (isRequired && (input.value === '' || isNaN(value))) { errorSpan.textContent = 'This field is required.'; errorSpan.style.display = 'block'; input.style.borderColor = '#dc3545'; isValid = false; } else if (!isNaN(value)) { if (min !== null && value max) { errorSpan.textContent = 'Value is too high.'; errorSpan.style.display = 'block'; input.style.borderColor = '#dc3545'; isValid = false; } } return isValid; } function calculateRefinance() { var isValid = true; isValid &= validateInput('currentLoanBalance', 0, null); isValid &= validateInput('currentInterestRate', 0, 100); isValid &= validateInput('currentLoanTerm', 1, 100); isValid &= validateInput('refinanceInterestRate', 0, 100); isValid &= validateInput('refinanceLoanTerm', 1, 100); isValid &= validateInput('refinanceFees', 0, null); if (!isValid) { document.getElementById('resultsContainer').style.display = 'none'; return; } var currentLoanBalance = parseFloat(document.getElementById('currentLoanBalance').value); var currentInterestRate = parseFloat(document.getElementById('currentInterestRate').value); var currentLoanTerm = parseFloat(document.getElementById('currentLoanTerm').value); var refinanceInterestRate = parseFloat(document.getElementById('refinanceInterestRate').value); var refinanceLoanTerm = parseFloat(document.getElementById('refinanceLoanTerm').value); var refinanceFees = parseFloat(document.getElementById('refinanceFees').value); var currentMonthlyPayment = calculateMonthlyPayment(currentLoanBalance, currentInterestRate, currentLoanTerm); var currentTotalInterest = calculateTotalInterest(currentLoanBalance, currentInterestRate, currentLoanTerm); var newMonthlyPayment = calculateMonthlyPayment(currentLoanBalance, refinanceInterestRate, refinanceLoanTerm); var newTotalInterest = calculateTotalInterest(currentLoanBalance, refinanceInterestRate, refinanceLoanTerm); var monthlyPaymentDifference = currentMonthlyPayment – newMonthlyPayment; var totalInterestSaved = currentTotalInterest – newTotalInterest; var estimatedTotalSavings = totalInterestSaved – refinanceFees; var breakEvenMonths = 'N/A'; if (monthlyPaymentDifference > 0 && monthlyPaymentDifference > 0.01) { // Avoid division by zero or tiny numbers breakEvenMonths = (refinanceFees / monthlyPaymentDifference).toFixed(2); } document.getElementById('currentMonthlyPayment').textContent = formatCurrency(currentMonthlyPayment); document.getElementById('newMonthlyPayment').textContent = formatCurrency(newMonthlyPayment); document.getElementById('currentTotalInterest').textContent = formatCurrency(currentTotalInterest); document.getElementById('newTotalInterest').textContent = formatCurrency(newTotalInterest); document.getElementById('totalInterestSaved').textContent = formatCurrency(totalInterestSaved); document.getElementById('monthlyPaymentDifference').textContent = formatCurrency(monthlyPaymentDifference); document.getElementById('estimatedTotalSavings').textContent = formatCurrency(estimatedTotalSavings); document.getElementById('breakEvenMonths').textContent = breakEvenMonths === 'N/A' ? 'N/A' : breakEvenMonths + ' months'; document.getElementById('resultsContainer').style.display = 'block'; updateChartAndTable(currentLoanBalance, currentInterestRate, currentLoanTerm, refinanceInterestRate, refinanceLoanTerm, refinanceFees); } function resetCalculator() { document.getElementById('currentLoanBalance').value = '250000'; document.getElementById('currentInterestRate').value = '4.5'; document.getElementById('currentLoanTerm').value = '25'; document.getElementById('refinanceInterestRate').value = '3.5'; document.getElementById('refinanceLoanTerm').value = '15'; document.getElementById('refinanceFees').value = '3000'; // Clear errors var errorSpans = document.querySelectorAll('.error-message'); for (var i = 0; i < errorSpans.length; i++) { errorSpans[i].style.display = 'none'; } var inputs = document.querySelectorAll('.loan-calc-container input'); for (var i = 0; i < inputs.length; i++) { inputs[i].style.borderColor = 'var(–border-color)'; } document.getElementById('resultsContainer').style.display = 'none'; if (chartInstance) { chartInstance.destroy(); chartInstance = null; } document.getElementById('amortizationTableBody').innerHTML = 'Enter details and click "Calculate Savings" to see the schedule.'; } function copyResults() { var resultsText = "— Refinance Savings Summary —\n"; resultsText += "Monthly Payment Difference: " + document.getElementById('monthlyPaymentDifference').textContent + "\n"; resultsText += "Estimated Total Savings: " + document.getElementById('estimatedTotalSavings').textContent + "\n"; resultsText += "Current Monthly Payment: " + document.getElementById('currentMonthlyPayment').textContent + "\n"; resultsText += "New Refinance Monthly Payment: " + document.getElementById('newMonthlyPayment').textContent + "\n"; resultsText += "Total Interest Paid (Current): " + document.getElementById('currentTotalInterest').textContent + "\n"; resultsText += "Total Interest Paid (Refinance): " + document.getElementById('newTotalInterest').textContent + "\n"; resultsText += "Total Interest Saved: " + document.getElementById('totalInterestSaved').textContent + "\n"; resultsText += "Break-Even Point (Months): " + document.getElementById('breakEvenMonths').textContent + "\n\n"; resultsText += "— Key Assumptions —\n"; resultsText += "Current Loan Balance: " + formatCurrency(parseFloat(document.getElementById('currentLoanBalance').value)) + "\n"; resultsText += "Current Interest Rate: " + document.getElementById('currentInterestRate').value + "%\n"; resultsText += "Current Loan Term: " + document.getElementById('currentLoanTerm').value + " years\n"; resultsText += "New Refinance Interest Rate: " + document.getElementById('refinanceInterestRate').value + "%\n"; resultsText += "New Refinance Loan Term: " + document.getElementById('refinanceLoanTerm').value + " years\n"; resultsText += "Estimated Refinance Fees: " + formatCurrency(parseFloat(document.getElementById('refinanceFees').value)) + "\n"; try { navigator.clipboard.writeText(resultsText).then(function() { alert('Results copied to clipboard!'); }).catch(function(err) { console.error('Failed to copy: ', err); prompt('Copy this text manually:', resultsText); }); } catch (err) { console.error('Clipboard API not available: ', err); prompt('Copy this text manually:', resultsText); } } function updateChartAndTable(currentBalance, currentRate, currentTerm, refinanceRate, refinanceTerm, fees) { var ctx = document.getElementById('amortizationChart').getContext('2d'); // Destroy previous chart instance if it exists if (chartInstance) { chartInstance.destroy(); } var years = Math.max(currentTerm, refinanceTerm); var labels = []; var currentBalances = []; var refinanceBalances = []; var currentInterestPaid = []; var refinanceInterestPaid = []; var tableHtml = "; var currentP = currentBalance; var refinanceP = currentBalance; var currentMonthly = calculateMonthlyPayment(currentBalance, currentRate, currentTerm); var refinanceMonthly = calculateMonthlyPayment(currentBalance, refinanceRate, refinanceTerm); var currentTotalInt = 0; var refinanceTotalInt = 0; var currentPaymentsMade = 0; var refinancePaymentsMade = 0; for (var year = 0; year <= years; year++) { var yearLabel = year === 0 ? 'Start' : year.toString(); labels.push(yearLabel); var currentYearInterest = 0; var refinanceYearInterest = 0; // Calculate balances and interest for the current year for (var month = 0; month < 12; month++) { if (currentPaymentsMade < currentTerm * 12) { var monthlyRate = currentRate / 100 / 12; var interestThisMonth = currentP * monthlyRate; var principalThisMonth = currentMonthly – interestThisMonth; currentP = Math.max(0, currentP – principalThisMonth); currentYearInterest += interestThisMonth; currentPaymentsMade++; } else { currentP = 0; // Loan paid off } if (refinancePaymentsMade 0) { // Skip start row for table data tableHtml += ''; tableHtml += '' + year + ''; tableHtml += '' + formatCurrency(currentBalances[year]) + ''; tableHtml += '' + formatCurrency(refinanceBalances[year]) + ''; tableHtml += '' + formatCurrency(currentInterestPaid[year]) + ''; tableHtml += '' + formatCurrency(refinanceInterestPaid[year]) + ''; tableHtml += ''; } } document.getElementById('amortizationTableBody').innerHTML = tableHtml || 'Calculation error or insufficient data.'; // Create Chart chartInstance = new Chart(ctx, { type: 'line', data: { labels: labels, datasets: [{ label: 'Current Loan Balance', data: currentBalances, borderColor: 'var(–primary-color)', backgroundColor: 'rgba(0, 74, 153, 0.1)', fill: false, tension: 0.1 }, { label: 'Refinance Loan Balance', data: refinanceBalances, borderColor: 'var(–success-color)', backgroundColor: 'rgba(40, 167, 69, 0.1)', fill: false, tension: 0.1 }] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, title: { display: true, text: 'Loan Balance ($)' }, ticks: { callback: function(value) { return formatCurrency(value); } } }, x: { title: { display: true, text: 'Year' } } }, plugins: { tooltip: { callbacks: { label: function(context) { var label = context.dataset.label || "; if (label) { label += ': '; } if (context.parsed.y !== null) { label += formatCurrency(context.parsed.y); } return label; } } }, legend: { display: false // We'll create a custom legend } } } }); // Create custom legend var legendHtml = '
'; legendHtml += '
Current Loan Balance
'; legendHtml += '
Refinance Loan Balance
'; legendHtml += '
'; document.getElementById('chartLegend').innerHTML = legendHtml; } // Initial calculation on load if values are present document.addEventListener('DOMContentLoaded', function() { // Check if inputs have default values and trigger calculation var currentLoanBalance = document.getElementById('currentLoanBalance').value; var currentInterestRate = document.getElementById('currentInterestRate').value; var currentLoanTerm = document.getElementById('currentLoanTerm').value; var refinanceInterestRate = document.getElementById('refinanceInterestRate').value; var refinanceLoanTerm = document.getElementById('refinanceLoanTerm').value; var refinanceFees = document.getElementById('refinanceFees').value; if (currentLoanBalance && currentInterestRate && currentLoanTerm && refinanceInterestRate && refinanceLoanTerm && refinanceFees) { calculateRefinance(); } // Add event listeners for real-time updates var inputs = document.querySelectorAll('.loan-calc-container input'); for (var i = 0; i < inputs.length; i++) { inputs[i].addEventListener('input', calculateRefinance); } }); // Simple Chart.js integration (assuming Chart.js is available globally or included) // If Chart.js is not available, this part will fail. For a pure HTML solution without external libs, // you'd need to implement charting using SVG or Canvas API directly, which is significantly more complex. // For this example, we'll assume Chart.js is available. If not, replace with pure JS charting. // Placeholder for Chart.js – In a real scenario, you'd include the Chart.js library. // For this self-contained HTML, we'll simulate its presence. var Chart = window.Chart || function() { console.warn("Chart.js library not found. Chart will not render."); return { destroy: function() { console.log("Dummy destroy called."); } }; };

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