$300,000 Mortgage at 5% for 20 Years

A $300,000 mortgage at 5% over 20 years has a monthly principal + interest payment of $1,980. You'll pay $175,168 in total interest, bringing total loan cost to $475,168.

Estimated monthly payment
$2,480
Principal + interest
$1,980
Property tax
$375
Home insurance
$125
PMI
$0
HOA
$0
Total monthly
$2,480
1st month interest
$1,250
1st month principal
$730
Total interest
$175,168
Balance after 1 year
$291,038
Balance after 5 years
$250,365
Total cost (P+I)
$475,168

Amortization (first 10 years)

YearPrincipalInterestBalance
1$8,962$14,796$291,038
2$9,420$14,338$281,618
3$9,902$13,856$271,715
4$10,409$13,349$261,306
5$10,942$12,817$250,365
6$11,501$12,257$238,863
7$12,090$11,669$226,773
8$12,708$11,050$214,065
9$13,359$10,400$200,707
10$14,042$9,716$186,665

15-year vs 30-year

TermMonthly P+ITotal interestTotal cost
15 years$2,372$127,029$427,029
30 years$1,610$279,767$579,767

Choosing 15 years over 30 saves about $152,739 in interest at this rate and loan amount.

Extra payments

Payment breakdown

Monthly P+I
$1,980
Total payments
240
Total interest
$175,168
Total cost (P+I only)
$475,168
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Last updated: 2026