$300,000 Mortgage at 4% for 15 Years

A $300,000 mortgage at 4% over 15 years has a monthly principal + interest payment of $2,219. You'll pay $99,431 in total interest, bringing total loan cost to $399,431.

Estimated monthly payment
$2,719
Principal + interest
$2,219
Property tax
$375
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$2,719
1st month interest
$1,000
1st month principal
$1,219
Total interest
$99,431
Balance after 1 year
$285,100
Balance after 5 years
$219,177
Total cost (P+I)
$399,431

Amortization (first 10 years)

YearPrincipalInterestBalance
1$14,900$11,729$285,100
2$15,507$11,122$269,593
3$16,139$10,490$253,454
4$16,796$9,832$236,658
5$17,481$9,148$219,177
6$18,193$8,436$200,985
7$18,934$7,695$182,051
8$19,705$6,923$162,345
9$20,508$6,121$141,837
10$21,344$5,285$120,493

15-year vs 30-year

TermMonthly P+ITotal interestTotal cost
15 years$2,219$99,431$399,431
30 years$1,432$215,609$515,609

Choosing 15 years over 30 saves about $116,177 in interest at this rate and loan amount.

Extra payments

Payment breakdown

Monthly P+I
$2,219
Total payments
180
Total interest
$99,431
Total cost (P+I only)
$399,431
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Last updated: 2026