$100,000 Mortgage at 3% for 15 Years
A $100,000 mortgage at 3% over 15 years has a monthly principal + interest payment of $691. You'll pay $24,305 in total interest, bringing total loan cost to $124,305.
Estimated monthly payment
$941
Principal + interest
$691
Property tax
$125
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$941
1st month interest
$250
1st month principal
$441
Total interest
$24,305
Balance after 1 year
$94,640
Balance after 5 years
$71,518
Total cost (P+I)
$124,305
Amortization (first 10 years)
| Year | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $5,360 | $2,927 | $94,640 |
| 2 | $5,523 | $2,764 | $89,116 |
| 3 | $5,691 | $2,596 | $83,425 |
| 4 | $5,864 | $2,423 | $77,561 |
| 5 | $6,043 | $2,244 | $71,518 |
| 6 | $6,227 | $2,060 | $65,291 |
| 7 | $6,416 | $1,871 | $58,875 |
| 8 | $6,611 | $1,676 | $52,264 |
| 9 | $6,812 | $1,475 | $45,452 |
| 10 | $7,019 | $1,268 | $38,432 |
15-year vs 30-year
| Term | Monthly P+I | Total interest | Total cost |
|---|---|---|---|
| 15 years | $691 | $24,305 | $124,305 |
| 30 years | $422 | $51,777 | $151,777 |
Choosing 15 years over 30 saves about $27,473 in interest at this rate and loan amount.
Extra payments
Payment breakdown
Monthly P+I
$691
Total payments
180
Total interest
$24,305
Total cost (P+I only)
$124,305
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Last updated: 2026