$300,000 Mortgage at 8.5% for 15 Years
A $300,000 mortgage at 8.5% over 15 years has a monthly principal + interest payment of $2,954. You'll pay $231,759 in total interest, bringing total loan cost to $531,759.
Estimated monthly payment
$3,454
Principal + interest
$2,954
Property tax
$375
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$3,454
1st month interest
$2,125
1st month principal
$829
Total interest
$231,759
Balance after 1 year
$289,652
Balance after 5 years
$238,271
Total cost (P+I)
$531,759
Amortization (first 10 years)
| Year | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $10,348 | $25,103 | $289,652 |
| 2 | $11,262 | $24,188 | $278,390 |
| 3 | $12,258 | $23,193 | $266,133 |
| 4 | $13,341 | $22,109 | $252,791 |
| 5 | $14,520 | $20,930 | $238,271 |
| 6 | $15,804 | $19,647 | $222,467 |
| 7 | $17,201 | $18,250 | $205,266 |
| 8 | $18,721 | $16,729 | $186,545 |
| 9 | $20,376 | $15,075 | $166,169 |
| 10 | $22,177 | $13,274 | $143,992 |
15-year vs 30-year
| Term | Monthly P+I | Total interest | Total cost |
|---|---|---|---|
| 15 years | $2,954 | $231,759 | $531,759 |
| 30 years | $2,307 | $530,427 | $830,427 |
Choosing 15 years over 30 saves about $298,667 in interest at this rate and loan amount.
Extra payments
Payment breakdown
Monthly P+I
$2,954
Total payments
180
Total interest
$231,759
Total cost (P+I only)
$531,759
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Last updated: 2026