$600,000 Mortgage at 8% for 20 Years

A $600,000 mortgage at 8% over 20 years has a monthly principal + interest payment of $5,019. You'll pay $604,474 in total interest, bringing total loan cost to $1,204,474.

Estimated monthly payment
$5,894
Principal + interest
$5,019
Property tax
$750
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$5,894
1st month interest
$4,000
1st month principal
$1,019
Total interest
$604,474
Balance after 1 year
$587,318
Balance after 5 years
$525,154
Total cost (P+I)
$1,204,474

Amortization (first 10 years)

YearPrincipalInterestBalance
1$12,682$47,542$587,318
2$13,735$46,489$573,583
3$14,875$45,349$558,709
4$16,109$44,115$542,600
5$17,446$42,777$525,154
6$18,894$41,329$506,259
7$20,462$39,761$485,797
8$22,161$38,063$463,636
9$24,000$36,224$439,636
10$25,992$34,232$413,644

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
$5,019
Total payments
240
Total interest
$604,474
Total cost (P+I only)
$1,204,474
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Last updated: 2026