$300,000 Mortgage at 8.5% for 30 Years
A $300,000 mortgage at 8.5% over 30 years has a monthly principal + interest payment of $2,307. You'll pay $530,427 in total interest, bringing total loan cost to $830,427.
Estimated monthly payment
$2,807
Principal + interest
$2,307
Property tax
$375
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$2,807
1st month interest
$2,125
1st month principal
$182
Total interest
$530,427
Balance after 1 year
$297,732
Balance after 5 years
$286,471
Total cost (P+I)
$830,427
Amortization (first 10 years)
| Year | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $2,268 | $25,413 | $297,732 |
| 2 | $2,468 | $25,213 | $295,264 |
| 3 | $2,687 | $24,994 | $292,577 |
| 4 | $2,924 | $24,757 | $289,653 |
| 5 | $3,182 | $24,498 | $286,471 |
| 6 | $3,464 | $24,217 | $283,007 |
| 7 | $3,770 | $23,911 | $279,237 |
| 8 | $4,103 | $23,578 | $275,134 |
| 9 | $4,466 | $23,215 | $270,668 |
| 10 | $4,861 | $22,820 | $265,808 |
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
$2,307
Total payments
360
Total interest
$530,427
Total cost (P+I only)
$830,427
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Last updated: 2026