$350,000 Mortgage at 8.5% for 20 Years

A $350,000 mortgage at 8.5% over 20 years has a monthly principal + interest payment of $3,037. You'll pay $378,972 in total interest, bringing total loan cost to $728,972.

Estimated monthly payment
$3,600
Principal + interest
$3,037
Property tax
$438
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$3,600
1st month interest
$2,479
1st month principal
$558
Total interest
$378,972
Balance after 1 year
$343,034
Balance after 5 years
$308,445
Total cost (P+I)
$728,972

Amortization (first 10 years)

YearPrincipalInterestBalance
1$6,966$29,483$343,034
2$7,582$28,867$335,453
3$8,252$28,197$327,201
4$8,981$27,468$318,220
5$9,775$26,674$308,445
6$10,639$25,810$297,806
7$11,579$24,869$286,227
8$12,603$23,846$273,624
9$13,717$22,732$259,908
10$14,929$21,519$244,978

15-year vs 30-year

TermMonthly P+ITotal interestTotal cost
15 years$3,447$270,386$620,386
30 years$2,691$618,831$968,831

Choosing 15 years over 30 saves about $348,445 in interest at this rate and loan amount.

Extra payments

Payment breakdown

Monthly P+I
$3,037
Total payments
240
Total interest
$378,972
Total cost (P+I only)
$728,972
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Last updated: 2026