Mortgage basics
Principal
In short
Principal is the amount you borrow — the loan balance itself, before interest. Each mortgage payment splits between paying principal down and paying interest.
Principal is the money you actually borrow to buy a home: the loan amount, separate from the interest a lender charges for lending it. On the day your loan funds, the principal is the full balance you owe.
On a standard fixed-rate loan, every monthly payment is divided between interest (the cost of borrowing) and principal (paying the balance down). Early on, most of the payment is interest and only a little reduces principal; over the years that ratio steadily flips. That schedule is called amortization.
Paying extra toward principal shrinks the balance faster and lowers the total interest paid over the life of the loan. Principal is only one part of a monthly housing payment — property taxes and insurance usually ride along too, which is what PITI describes.
Related
Current as of August 2026.