$100,000 Mortgage at 3% for 20 Years
A $100,000 mortgage at 3% over 20 years has a monthly principal + interest payment of $555. You'll pay $33,103 in total interest, bringing total loan cost to $133,103.
Estimated monthly payment
$805
Principal + interest
$555
Property tax
$125
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$805
1st month interest
$250
1st month principal
$305
Total interest
$33,103
Balance after 1 year
$96,294
Balance after 5 years
$80,309
Total cost (P+I)
$133,103
Amortization (first 10 years)
| Year | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $3,706 | $2,949 | $96,294 |
| 2 | $3,819 | $2,837 | $92,476 |
| 3 | $3,935 | $2,720 | $88,541 |
| 4 | $4,054 | $2,601 | $84,486 |
| 5 | $4,178 | $2,477 | $80,309 |
| 6 | $4,305 | $2,350 | $76,004 |
| 7 | $4,436 | $2,219 | $71,568 |
| 8 | $4,571 | $2,085 | $66,998 |
| 9 | $4,710 | $1,946 | $62,288 |
| 10 | $4,853 | $1,802 | $57,435 |
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
$555
Total payments
240
Total interest
$33,103
Total cost (P+I only)
$133,103
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Last updated: 2026