$900,000 Mortgage at 8% for 15 Years
A $900,000 mortgage at 8% over 15 years has a monthly principal + interest payment of $8,601. You'll pay $648,156 in total interest, bringing total loan cost to $1,548,156.
Estimated monthly payment
$9,851
Principal + interest
$8,601
Property tax
$1,125
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$9,851
1st month interest
$6,000
1st month principal
$2,601
Total interest
$648,156
Balance after 1 year
$867,619
Balance after 5 years
$708,896
Total cost (P+I)
$1,548,156
Amortization (first 10 years)
| Year | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $32,381 | $70,830 | $867,619 |
| 2 | $35,068 | $68,142 | $832,551 |
| 3 | $37,979 | $65,232 | $794,572 |
| 4 | $41,131 | $62,079 | $753,441 |
| 5 | $44,545 | $58,665 | $708,896 |
| 6 | $48,242 | $54,968 | $660,654 |
| 7 | $52,246 | $50,964 | $608,408 |
| 8 | $56,583 | $46,628 | $551,825 |
| 9 | $61,279 | $41,931 | $490,546 |
| 10 | $66,365 | $36,845 | $424,181 |
15-year vs 30-year
| Term | Monthly P+I | Total interest | Total cost |
|---|---|---|---|
| 15 years | $8,601 | $648,156 | $1,548,156 |
| 30 years | $6,604 | $1,477,397 | $2,377,397 |
Choosing 15 years over 30 saves about $829,241 in interest at this rate and loan amount.
Extra payments
Payment breakdown
Monthly P+I
$8,601
Total payments
180
Total interest
$648,156
Total cost (P+I only)
$1,548,156
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$8,123/mo
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$9,079/mo
$800,000 · 8% · 15 yr
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$1,000,000 · 8% · 15 yr
$9,557/mo
$900,000 · 7.5% · 15 yr
$8,343/mo
$900,000 · 8.5% · 15 yr
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$900,000 · 7% · 15 yr
$8,089/mo
$900,000 · 9% · 15 yr
$9,128/mo
$900,000 · 8% · 20 yr
$7,528/mo
$900,000 · 8% · 30 yr
$6,604/mo
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Last updated: 2026