$1,000,000 Mortgage at 8% for 20 Years

A $1,000,000 mortgage at 8% over 20 years has a monthly principal + interest payment of $8,364. You'll pay $1,007,456 in total interest, bringing total loan cost to $2,007,456.

Estimated monthly payment
$9,739
Principal + interest
$8,364
Property tax
$1,250
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$9,739
1st month interest
$6,667
1st month principal
$1,698
Total interest
$1,007,456
Balance after 1 year
$978,863
Balance after 5 years
$875,256
Total cost (P+I)
$2,007,456

Amortization (first 10 years)

YearPrincipalInterestBalance
1$21,137$79,236$978,863
2$22,891$77,482$955,972
3$24,791$75,582$931,181
4$26,849$73,524$904,333
5$29,077$71,296$875,256
6$31,490$68,882$843,765
7$34,104$66,269$809,661
8$36,935$63,438$772,727
9$40,000$60,373$732,727
10$43,320$57,053$689,406

15-year vs 30-year

TermMonthly P+ITotal interestTotal cost
15 years$9,557$720,174$1,720,174
30 years$7,338$1,641,552$2,641,552

Choosing 15 years over 30 saves about $921,379 in interest at this rate and loan amount.

Extra payments

Payment breakdown

Monthly P+I
$8,364
Total payments
240
Total interest
$1,007,456
Total cost (P+I only)
$2,007,456
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Last updated: 2026