$300,000 Mortgage at 5.5% for 15 Years

A $300,000 mortgage at 5.5% over 15 years has a monthly principal + interest payment of $2,451. You'll pay $141,225 in total interest, bringing total loan cost to $441,225.

Estimated monthly payment
$2,951
Principal + interest
$2,451
Property tax
$375
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$2,951
1st month interest
$1,375
1st month principal
$1,076
Total interest
$141,225
Balance after 1 year
$286,754
Balance after 5 years
$225,867
Total cost (P+I)
$441,225

Amortization (first 10 years)

YearPrincipalInterestBalance
1$13,246$16,169$286,754
2$13,993$15,422$272,762
3$14,782$14,633$257,980
4$15,616$13,799$242,364
5$16,497$12,918$225,867
6$17,427$11,988$208,440
7$18,410$11,005$190,029
8$19,449$9,966$170,581
9$20,546$8,869$150,035
10$21,705$7,710$128,330

15-year vs 30-year

TermMonthly P+ITotal interestTotal cost
15 years$2,451$141,225$441,225
30 years$1,703$313,212$613,212

Choosing 15 years over 30 saves about $171,987 in interest at this rate and loan amount.

Extra payments

Payment breakdown

Monthly P+I
$2,451
Total payments
180
Total interest
$141,225
Total cost (P+I only)
$441,225
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Last updated: 2026