Principal Definition | Business Lending Glossary

Definition

The original amount borrowed in a loan, separate from interest and fees, which must be repaid in full.

Explanation

Principal is the base amount you borrow. Interest is calculated on the outstanding principal balance, which is why your interest costs decrease over time as you make payments on an amortizing loan — you are progressively reducing the principal on which interest accrues. In MCA and factor-rate financing, the concept of principal is replaced by the advance amount, and interest is replaced by the cost embedded in the factor rate. In traditional loans, understanding the distinction between principal and interest in each payment is important for financial planning and tax purposes.

Example

A business borrows $80,000 at 9% APR for 3 years. The $80,000 is the principal. Monthly payments of approximately $2,543 include both principal reduction and interest. By month 36, the full $80,000 principal is repaid plus approximately $11,550 in total interest.

Why It Matters

Tracking how much of each payment goes toward principal versus interest helps you understand how quickly you are building equity and reducing your debt. Extra principal payments reduce your outstanding balance, lower total interest costs, and can shorten your loan term.

Frequently asked questions

Can I make extra principal payments on a business loan?

Most term loans allow extra principal payments, though some may have prepayment penalties. Always confirm whether there is a prepayment penalty before making extra payments. Extra principal payments reduce the outstanding balance and total interest paid.

How is principal different from the amount I receive at closing?

If your loan has origination fees or closing costs deducted at funding, you may receive less than the stated principal. For example, a $100,000 loan with a $3,000 origination fee nets you $97,000 at closing, but you repay the full $100,000 principal plus interest.