A borrower takes out a $350,000 mortgage. That $350,000 is the principal—the original amount borrowed, separate from interest. Each payment that reduces the outstanding balance pays down principal.

Early in a standard amortizing loan, only a small portion of each payment reduces principal. Over time the principal portion grows. Extra payments directed toward principal shorten the loan term and reduce total interest paid.

Loan documents distinguish principal from interest, fees, and escrow amounts. When a loan is paid off, the remaining principal is the amount required to release the lien. Understanding principal helps borrowers see how equity builds and how prepayments affect the debt.

• Original amount borrowed on a loan
• Reduced by the principal portion of payments
• Separate from interest and fees
• Paydown builds owner equity