$900,000 Mortgage at 3% for 30 Years

A $900,000 mortgage at 3% over 30 years has a monthly principal + interest payment of $3,794. You'll pay $465,997 in total interest, bringing total loan cost to $1,365,997.

Estimated monthly payment
$5,044
Principal + interest
$3,794
Property tax
$1,125
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$5,044
1st month interest
$2,250
1st month principal
$1,544
Total interest
$465,997
Balance after 1 year
$881,210
Balance after 5 years
$800,157
Total cost (P+I)
$1,365,997

Amortization (first 10 years)

YearPrincipalInterestBalance
1$18,790$26,743$881,210
2$19,362$26,172$861,848
3$19,951$25,583$841,897
4$20,557$24,976$821,340
5$21,183$24,351$800,157
6$21,827$23,706$778,330
7$22,491$23,042$755,839
8$23,175$22,358$732,664
9$23,880$21,653$708,784
10$24,606$20,927$684,178

15-year vs 30-year

TermMonthly P+ITotal interestTotal cost
15 years$6,215$218,742$1,118,742
30 years$3,794$465,997$1,365,997

Choosing 15 years over 30 saves about $247,255 in interest at this rate and loan amount.

Extra payments

Payment breakdown

Monthly P+I
$3,794
Total payments
360
Total interest
$465,997
Total cost (P+I only)
$1,365,997
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Last updated: 2026