$450,000 Mortgage at 7.5% for 15 Years

A $450,000 mortgage at 7.5% over 15 years has a monthly principal + interest payment of $4,172. You'll pay $300,880 in total interest, bringing total loan cost to $750,880.

Estimated monthly payment
$4,859
Principal + interest
$4,172
Property tax
$563
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$4,859
1st month interest
$2,812
1st month principal
$1,359
Total interest
$300,880
Balance after 1 year
$433,119
Balance after 5 years
$351,432
Total cost (P+I)
$750,880

Amortization (first 10 years)

YearPrincipalInterestBalance
1$16,881$33,178$433,119
2$18,192$31,867$414,927
3$19,604$30,455$395,323
4$21,126$28,933$374,197
5$22,766$27,293$351,432
6$24,533$25,525$326,898
7$26,438$23,621$300,461
8$28,490$21,568$271,970
9$30,702$19,357$241,268
10$33,086$16,973$208,183

15-year vs 30-year

TermMonthly P+ITotal interestTotal cost
15 years$4,172$300,880$750,880
30 years$3,146$682,728$1,132,728

Choosing 15 years over 30 saves about $381,847 in interest at this rate and loan amount.

Extra payments

Payment breakdown

Monthly P+I
$4,172
Total payments
180
Total interest
$300,880
Total cost (P+I only)
$750,880
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Last updated: 2026