$100,000 Mortgage at 8% for 30 Years
A $100,000 mortgage at 8% over 30 years has a monthly principal + interest payment of $734. You'll pay $164,155 in total interest, bringing total loan cost to $264,155.
Estimated monthly payment
$984
Principal + interest
$734
Property tax
$125
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$984
1st month interest
$667
1st month principal
$67
Total interest
$164,155
Balance after 1 year
$99,165
Balance after 5 years
$95,070
Total cost (P+I)
$264,155
Amortization (first 10 years)
| Year | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $835 | $7,970 | $99,165 |
| 2 | $905 | $7,900 | $98,260 |
| 3 | $980 | $7,825 | $97,280 |
| 4 | $1,061 | $7,744 | $96,219 |
| 5 | $1,149 | $7,656 | $95,070 |
| 6 | $1,245 | $7,561 | $93,825 |
| 7 | $1,348 | $7,457 | $92,477 |
| 8 | $1,460 | $7,345 | $91,018 |
| 9 | $1,581 | $7,224 | $89,437 |
| 10 | $1,712 | $7,093 | $87,725 |
15-year vs 30-year
| Term | Monthly P+I | Total interest | Total cost |
|---|---|---|---|
| 15 years | $956 | $72,017 | $172,017 |
| 30 years | $734 | $164,155 | $264,155 |
Choosing 15 years over 30 saves about $92,138 in interest at this rate and loan amount.
Extra payments
Payment breakdown
Monthly P+I
$734
Total payments
360
Total interest
$164,155
Total cost (P+I only)
$264,155
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Last updated: 2026