$100,000 Mortgage at 8% for 15 Years
A $100,000 mortgage at 8% over 15 years has a monthly principal + interest payment of $956. You'll pay $72,017 in total interest, bringing total loan cost to $172,017.
Estimated monthly payment
$1,206
Principal + interest
$956
Property tax
$125
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$1,206
1st month interest
$667
1st month principal
$289
Total interest
$72,017
Balance after 1 year
$96,402
Balance after 5 years
$78,766
Total cost (P+I)
$172,017
Amortization (first 10 years)
| Year | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $3,598 | $7,870 | $96,402 |
| 2 | $3,896 | $7,571 | $92,506 |
| 3 | $4,220 | $7,248 | $88,286 |
| 4 | $4,570 | $6,898 | $83,716 |
| 5 | $4,949 | $6,518 | $78,766 |
| 6 | $5,360 | $6,108 | $73,406 |
| 7 | $5,805 | $5,663 | $67,601 |
| 8 | $6,287 | $5,181 | $61,314 |
| 9 | $6,809 | $4,659 | $54,505 |
| 10 | $7,374 | $4,094 | $47,131 |
15-year vs 30-year
| Term | Monthly P+I | Total interest | Total cost |
|---|---|---|---|
| 15 years | $956 | $72,017 | $172,017 |
| 30 years | $734 | $164,155 | $264,155 |
Choosing 15 years over 30 saves about $92,138 in interest at this rate and loan amount.
Extra payments
Payment breakdown
Monthly P+I
$956
Total payments
180
Total interest
$72,017
Total cost (P+I only)
$172,017
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Last updated: 2026