$350,000 Mortgage at 3.5% for 15 Years

A $350,000 mortgage at 3.5% over 15 years has a monthly principal + interest payment of $2,502. You'll pay $100,376 in total interest, bringing total loan cost to $450,376.

Estimated monthly payment
$3,065
Principal + interest
$2,502
Property tax
$438
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$3,065
1st month interest
$1,021
1st month principal
$1,481
Total interest
$100,376
Balance after 1 year
$331,937
Balance after 5 years
$253,028
Total cost (P+I)
$450,376

Amortization (first 10 years)

YearPrincipalInterestBalance
1$18,063$11,962$331,937
2$18,705$11,320$313,232
3$19,371$10,654$293,861
4$20,060$9,965$273,801
5$20,773$9,252$253,028
6$21,512$8,513$231,516
7$22,277$7,748$209,239
8$23,069$6,956$186,169
9$23,890$6,135$162,279
10$24,740$5,285$137,540

15-year vs 30-year

TermMonthly P+ITotal interestTotal cost
15 years$2,502$100,376$450,376
30 years$1,572$215,796$565,796

Choosing 15 years over 30 saves about $115,420 in interest at this rate and loan amount.

Extra payments

Payment breakdown

Monthly P+I
$2,502
Total payments
180
Total interest
$100,376
Total cost (P+I only)
$450,376
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Last updated: 2026