Principal and Interest (P&I) (P&I)
Direct definition
The portion of a mortgage payment that pays down principal and the cost of borrowing.
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
P&I is the base amortized payment on the loan itself. Taxes, insurance, HOA, and mortgage insurance are added to reach PITI.
Why it matters
P&I is what's fixed on a fixed-rate loan — the pieces added on top can and do change.
Where you may see it
- Loan Estimate
- Mortgage statement
- Amortization schedule
A real-world example
A 30-year, $400,000 loan at 6.5% has a P&I of $2,528.27; escrow adds another $650 to reach a $3,178 PITI.
Educational and illustrative only
A common misunderstanding
P&I isn't the full monthly housing payment — it typically excludes taxes, insurance, and HOA dues, which are shown separately.
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