Mortgage Payoff Calculator
This mortgage payoff calculator helps evaluate how adding extra payments or biweekly payments can save on interest and shorten mortgage term.
If you know the remaining loan term
Use this calculator if the term length of the remaining loan is known and there is information on the original loan – good for new loans or preexisting loans that have never been supplemented with any external payments.
$
years
%
years
months
Repayment options:
Click Calculate to see results
If you don't know the remaining loan term
Use this calculator if the term length of the remaining loan is not known. The unpaid principal balance, interest rate, and monthly payment values can be found in the monthly or quarterly mortgage statement.
$
$
%
Repayment options:
Click Calculate to see results
';
html += '';
html += '';
html += '
';
}
// Comparison table
html += 'Interest savings
' + formatCurrency(r.interestSavings) + '
';
html += 'Original: ' + formatCurrency(r.originalRemainingInterest) + '
With payoff: ' + formatCurrency(r.newRemainingInterest) + '
Pay ' + iSavPct + '% less on interest
With payoff: ' + formatCurrency(r.newRemainingInterest) + '
Pay ' + iSavPct + '% less on interest
Time savings
' + formatMonths(r.timeSavingsMonths) + '
';
html += 'Original: ' + formatMonths(r.originalSchedule.length) + '
With payoff: ' + formatMonths(r.newSchedule.length) + '
Payoff ' + tSavPct + '% faster
With payoff: ' + formatMonths(r.newSchedule.length) + '
Payoff ' + tSavPct + '% faster
| Original | With payoff | |
|---|---|---|
| ' + rows[i][0] + ' | ' + rows[i][1] + ' | ' + rows[i][2] + ' |
â–¶View Amortization Table
Click to expand| Original (without payoff) | With payoff | |||||
|---|---|---|---|---|---|---|
| Interest | Principal | Balance | Interest | Principal | Balance | |
| Year ' + year + ' | '; html += '' + (oe.length > 0 ? formatCurrencyDecimal(oInt) : '-') + ' | '; html += '' + (oe.length > 0 ? formatCurrencyDecimal(oPrin) : '-') + ' | '; html += '' + (oe.length > 0 ? formatCurrencyDecimal(oBal) : '-') + ' | '; html += '' + (ne.length > 0 ? formatCurrencyDecimal(nInt) : '-') + ' | '; html += '' + (ne.length > 0 ? formatCurrencyDecimal(nPrin) : '-') + ' | '; html += '' + (ne.length > 0 ? formatCurrencyDecimal(nBal) : '-') + ' | '; html += '
Click Calculate to see results
';
}
function clearUnknown() {
document.getElementById('u-principal').value = '';
document.getElementById('u-monthlyPayment').value = '';
document.getElementById('u-interestRate').value = '';
document.getElementById('u-extraAmount').value = '';
document.getElementById('u-results').innerHTML = 'Click Calculate to see results
';
}
// ===== PDF EXPORT =====
function exportPDF(containerId, title) {
var r = window['result_' + containerId];
if (!r) return;
var jsPDF = window.jspdf.jsPDF;
var doc = new jsPDF();
doc.setFontSize(18);
doc.setFont('helvetica', 'bold');
doc.text('Mortgage Payoff Calculator Results', 105, 20, { align: 'center' });
doc.setFontSize(12);
doc.setTextColor(90, 154, 58);
doc.text(title, 105, 30, { align: 'center' });
doc.setFontSize(14);
doc.text('Payoff in ' + formatMonths(r.newPayoffMonths), 105, 42, { align: 'center' });
doc.setTextColor(0, 0, 0);
doc.setFontSize(11);
doc.setFont('helvetica', 'normal');
var y = 55;
if (r.interestSavings > 0) {
doc.text('Interest Savings: ' + formatCurrency(r.interestSavings), 20, y); y += 7;
doc.text('Time Savings: ' + formatMonths(r.timeSavingsMonths), 20, y); y += 12;
}
doc.setFont('helvetica', 'bold');
doc.text('Comparison', 20, y); y += 8;
doc.text('', 25, y);
doc.text('Original', 120, y);
doc.text('With Payoff', 165, y); y += 7;
doc.setFont('helvetica', 'normal');
var pdfRows = [
['Monthly pay', formatCurrencyDecimal(r.originalMonthlyPayment), formatCurrencyDecimal(r.newMonthlyPayment)],
['Total payments', formatCurrencyDecimal(r.originalTotalPayments), formatCurrencyDecimal(r.newTotalPayments)],
['Total interest', formatCurrencyDecimal(r.originalTotalInterest), formatCurrencyDecimal(r.newTotalInterest)],
['Remaining payments', formatCurrencyDecimal(r.originalRemainingPayments), formatCurrencyDecimal(r.newRemainingPayments)],
['Remaining interest', formatCurrencyDecimal(r.originalRemainingInterest), formatCurrencyDecimal(r.newRemainingInterest)],
['Payoff in', formatMonths(r.originalSchedule.length), formatMonths(r.newSchedule.length)]
];
pdfRows.forEach(function(row) {
doc.text(row[0], 25, y);
doc.text(row[1], 120, y);
doc.text(row[2], 165, y);
y += 7;
});
doc.setFontSize(9);
doc.setTextColor(150, 150, 150);
doc.text('Generated on ' + new Date().toLocaleString(), 105, 280, { align: 'center' });
doc.save('mortgage-payoff-' + new Date().toISOString().split('T')[0] + '.pdf');
}