Glossary4 min readUpdated Feb 2026

Principal: The Core Amount of Your Business Loan

Understand what principal means in lending, how it differs from interest, and how principal payments affect your loan balance.

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What Is Principal?

Principal is the original amount borrowed—the core debt that must be repaid. When you take a $500,000 loan, the principal is $500,000. Interest is the cost of borrowing, charged as a percentage of the outstanding principal.

Each loan payment typically includes both principal and interest. As you make payments, the principal balance decreases, and with it, the interest charged.

Principal vs. Interest

Understanding the difference matters for your financial planning:

PrincipalInterest
The amount borrowedThe cost of borrowing
Decreases with each paymentCalculated on remaining principal
Same total regardless of rateVaries based on rate and time
Builds equity when reducedDoes not build equity

How Principal Payments Work

In a standard amortizing loan:

  • Early payments are mostly interest
  • Later payments are mostly principal
  • Total principal paid always equals original loan amount
  • Extra principal payments reduce future interest costs
  • Interest-only periods delay principal repayment

Accelerating Principal Paydown

Paying extra principal can save significant interest over the loan term.

Check for prepayment penalties before making extra principal payments. If there are no penalties, even small additional principal payments can substantially reduce your total interest cost and payoff time.

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Important Disclosure

Not Financial Advice: The information provided in this article is for general informational purposes only and does not constitute financial, legal, or professional advice. You should consult with qualified professionals before making any financial decisions.

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Rate Information: Rates, terms, and fees mentioned in this article are estimates based on publicly available information and may not reflect current market conditions or specific lender offers. Actual rates depend on creditworthiness, business financials, and lender policies.

Information May Change: Financial markets, lending regulations, and economic conditions are subject to rapid change. While we strive to keep our content accurate and up-to-date, information in this article may become outdated. Always verify current rates, terms, program availability, and regulatory requirements with lenders and official sources before making financial decisions.