$800,000 Mortgage at 8% for 30 Years
A $800,000 mortgage at 8% over 30 years has a monthly principal + interest payment of $5,870. You'll pay $1,313,242 in total interest, bringing total loan cost to $2,113,242.
Estimated monthly payment
$6,995
Principal + interest
$5,870
Property tax
$1,000
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$6,995
1st month interest
$5,333
1st month principal
$537
Total interest
$1,313,242
Balance after 1 year
$793,317
Balance after 5 years
$760,559
Total cost (P+I)
$2,113,242
Amortization (first 10 years)
| Year | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $6,683 | $63,758 | $793,317 |
| 2 | $7,238 | $63,204 | $786,079 |
| 3 | $7,838 | $62,603 | $778,241 |
| 4 | $8,489 | $61,953 | $769,752 |
| 5 | $9,193 | $61,248 | $760,559 |
| 6 | $9,957 | $60,485 | $750,602 |
| 7 | $10,783 | $59,659 | $739,819 |
| 8 | $11,678 | $58,764 | $728,142 |
| 9 | $12,647 | $57,794 | $715,494 |
| 10 | $13,697 | $56,745 | $701,798 |
15-year vs 30-year
| Term | Monthly P+I | Total interest | Total cost |
|---|---|---|---|
| 15 years | $7,645 | $576,139 | $1,376,139 |
| 30 years | $5,870 | $1,313,242 | $2,113,242 |
Choosing 15 years over 30 saves about $737,103 in interest at this rate and loan amount.
Extra payments
Payment breakdown
Monthly P+I
$5,870
Total payments
360
Total interest
$1,313,242
Total cost (P+I only)
$2,113,242
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Last updated: 2026