$100,000 Mortgage at 8.5% for 20 Years
A $100,000 mortgage at 8.5% over 20 years has a monthly principal + interest payment of $868. You'll pay $108,278 in total interest, bringing total loan cost to $208,278.
Estimated monthly payment
$1,118
Principal + interest
$868
Property tax
$125
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$1,118
1st month interest
$708
1st month principal
$159
Total interest
$108,278
Balance after 1 year
$98,010
Balance after 5 years
$88,127
Total cost (P+I)
$208,278
Amortization (first 10 years)
| Year | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $1,990 | $8,424 | $98,010 |
| 2 | $2,166 | $8,248 | $95,844 |
| 3 | $2,358 | $8,056 | $93,486 |
| 4 | $2,566 | $7,848 | $90,920 |
| 5 | $2,793 | $7,621 | $88,127 |
| 6 | $3,040 | $7,374 | $85,088 |
| 7 | $3,308 | $7,106 | $81,779 |
| 8 | $3,601 | $6,813 | $78,178 |
| 9 | $3,919 | $6,495 | $74,259 |
| 10 | $4,265 | $6,148 | $69,994 |
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
$868
Total payments
240
Total interest
$108,278
Total cost (P+I only)
$208,278
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Last updated: 2026