$100,000 Mortgage at 8.5% for 15 Years
A $100,000 mortgage at 8.5% over 15 years has a monthly principal + interest payment of $985. You'll pay $77,253 in total interest, bringing total loan cost to $177,253.
Estimated monthly payment
$1,235
Principal + interest
$985
Property tax
$125
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$1,235
1st month interest
$708
1st month principal
$276
Total interest
$77,253
Balance after 1 year
$96,551
Balance after 5 years
$79,424
Total cost (P+I)
$177,253
Amortization (first 10 years)
| Year | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $3,449 | $8,368 | $96,551 |
| 2 | $3,754 | $8,063 | $92,797 |
| 3 | $4,086 | $7,731 | $88,711 |
| 4 | $4,447 | $7,370 | $84,264 |
| 5 | $4,840 | $6,977 | $79,424 |
| 6 | $5,268 | $6,549 | $74,156 |
| 7 | $5,734 | $6,083 | $68,422 |
| 8 | $6,240 | $5,576 | $62,182 |
| 9 | $6,792 | $5,025 | $55,390 |
| 10 | $7,392 | $4,425 | $47,997 |
15-year vs 30-year
| Term | Monthly P+I | Total interest | Total cost |
|---|---|---|---|
| 15 years | $985 | $77,253 | $177,253 |
| 30 years | $769 | $176,809 | $276,809 |
Choosing 15 years over 30 saves about $99,556 in interest at this rate and loan amount.
Extra payments
Payment breakdown
Monthly P+I
$985
Total payments
180
Total interest
$77,253
Total cost (P+I only)
$177,253
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Last updated: 2026