Principal
Direct definition
The unpaid balance of a loan — what you actually owe, separate from interest.
Written by the Vabasso Mortgage Editorial Team · Reviewed against agency and federal sources · Read our editorial policy for how we research and review mortgage content
Plain-English explanation
Each amortized payment reduces principal by a growing amount over time. Extra principal payments accelerate payoff and reduce total interest.
Why it matters
Reducing principal is how you build equity in the loan itself.
Where you may see it
- Mortgage statement
- Amortization schedule
- Closing Disclosure
A real-world example
A $400,000 loan starts with a $400,000 principal balance; after a year of payments it might be about $394,700.
Educational and illustrative only
A common misunderstanding
Principal isn't the original loan amount forever — it's the current unpaid balance, which decreases as payments are made.
Ask Vabasso AI
This glossary provides general educational information. Mortgage terminology, qualification methods, forms, timelines, fees, program rules, and legal meanings may vary by lender, investor, loan program, property, occupancy, state, and transaction. Definitions do not represent loan approval, legal advice, tax advice, or a commitment to lend.
- Author
- Vabasso Mortgage Editorial Team
- Reviewed by
- Vabasso Mortgage Licensed Advisory Team
- Last reviewed
- July 30, 2026