$600,000 Mortgage at 8% for 15 Years

A $600,000 mortgage at 8% over 15 years has a monthly principal + interest payment of $5,734. You'll pay $432,104 in total interest, bringing total loan cost to $1,032,104.

Estimated monthly payment
$6,609
Principal + interest
$5,734
Property tax
$750
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$6,609
1st month interest
$4,000
1st month principal
$1,734
Total interest
$432,104
Balance after 1 year
$578,413
Balance after 5 years
$472,598
Total cost (P+I)
$1,032,104

Amortization (first 10 years)

YearPrincipalInterestBalance
1$21,587$47,220$578,413
2$23,379$45,428$555,034
3$25,319$43,488$529,715
4$27,421$41,386$502,294
5$29,697$39,110$472,598
6$32,161$36,646$440,436
7$34,831$33,976$405,605
8$37,722$31,085$367,884
9$40,853$27,954$327,031
10$44,243$24,564$282,788

15-year vs 30-year

TermMonthly P+ITotal interestTotal cost
15 years$5,734$432,104$1,032,104
30 years$4,403$984,931$1,584,931

Choosing 15 years over 30 saves about $552,827 in interest at this rate and loan amount.

Extra payments

Payment breakdown

Monthly P+I
$5,734
Total payments
180
Total interest
$432,104
Total cost (P+I only)
$1,032,104
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Last updated: 2026