1What is a mortgage?
A loan to buy a home, secured by that home. The lender pays the seller, you own the home, and you repay the lender over time with interest.
Where each year's payments go
In year 1, about $22,066 goes to interest and $11,142 to principal. By year 25, almost everything goes to principal.
Illustrative: $500,000 at 4.50% over 25 years, rate unchanged. Real mortgages renew every few years.
