$900,000 Mortgage at 3% for 15 Years

A $900,000 mortgage at 3% over 15 years has a monthly principal + interest payment of $6,215. You'll pay $218,742 in total interest, bringing total loan cost to $1,118,742.

Estimated monthly payment
$7,465
Principal + interest
$6,215
Property tax
$1,125
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$7,465
1st month interest
$2,250
1st month principal
$3,965
Total interest
$218,742
Balance after 1 year
$851,757
Balance after 5 years
$643,661
Total cost (P+I)
$1,118,742

Amortization (first 10 years)

YearPrincipalInterestBalance
1$48,243$26,340$851,757
2$49,710$24,873$802,048
3$51,222$23,361$750,826
4$52,780$21,803$698,046
5$54,385$20,198$643,661
6$56,039$18,543$587,621
7$57,744$16,839$529,877
8$59,500$15,083$470,377
9$61,310$13,273$409,067
10$63,175$11,408$345,892

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
$6,215
Total payments
180
Total interest
$218,742
Total cost (P+I only)
$1,118,742
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Last updated: 2026