$600,000 Mortgage at 5% for 20 Years

A $600,000 mortgage at 5% over 20 years has a monthly principal + interest payment of $3,960. You'll pay $350,336 in total interest, bringing total loan cost to $950,336.

Estimated monthly payment
$4,835
Principal + interest
$3,960
Property tax
$750
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$4,835
1st month interest
$2,500
1st month principal
$1,460
Total interest
$350,336
Balance after 1 year
$582,076
Balance after 5 years
$500,729
Total cost (P+I)
$950,336

Amortization (first 10 years)

YearPrincipalInterestBalance
1$17,924$29,593$582,076
2$18,841$28,676$563,235
3$19,805$27,712$543,430
4$20,818$26,699$522,612
5$21,883$25,634$500,729
6$23,003$24,514$477,726
7$24,180$23,337$453,547
8$25,417$22,100$428,130
9$26,717$20,800$401,413
10$28,084$19,433$373,329

15-year vs 30-year

TermMonthly P+ITotal interestTotal cost
15 years$4,745$254,057$854,057
30 years$3,221$559,535$1,159,535

Choosing 15 years over 30 saves about $305,478 in interest at this rate and loan amount.

Extra payments

Payment breakdown

Monthly P+I
$3,960
Total payments
240
Total interest
$350,336
Total cost (P+I only)
$950,336
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Last updated: 2026