$300,000 Mortgage at 3% for 15 Years
A $300,000 mortgage at 3% over 15 years has a monthly principal + interest payment of $2,072. You'll pay $72,914 in total interest, bringing total loan cost to $372,914.
Estimated monthly payment
$2,572
Principal + interest
$2,072
Property tax
$375
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$2,572
1st month interest
$750
1st month principal
$1,322
Total interest
$72,914
Balance after 1 year
$283,919
Balance after 5 years
$214,554
Total cost (P+I)
$372,914
Amortization (first 10 years)
| Year | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $16,081 | $8,780 | $283,919 |
| 2 | $16,570 | $8,291 | $267,349 |
| 3 | $17,074 | $7,787 | $250,275 |
| 4 | $17,593 | $7,268 | $232,682 |
| 5 | $18,128 | $6,733 | $214,554 |
| 6 | $18,680 | $6,181 | $195,874 |
| 7 | $19,248 | $5,613 | $176,626 |
| 8 | $19,833 | $5,028 | $156,792 |
| 9 | $20,437 | $4,424 | $136,356 |
| 10 | $21,058 | $3,803 | $115,297 |
15-year vs 30-year
| Term | Monthly P+I | Total interest | Total cost |
|---|---|---|---|
| 15 years | $2,072 | $72,914 | $372,914 |
| 30 years | $1,265 | $155,332 | $455,332 |
Choosing 15 years over 30 saves about $82,418 in interest at this rate and loan amount.
Extra payments
Payment breakdown
Monthly P+I
$2,072
Total payments
180
Total interest
$72,914
Total cost (P+I only)
$372,914
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Last updated: 2026