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Buying a Home

What Is a Promissory Note in a Mortgage?

Patrick Kevin Fagan Patrick Kevin Fagan Updated August 18, 2026

A promissory note is the legal document where you promise to repay your mortgage loan. It specifies the loan amount, interest rate, monthly payment, payment schedule, loan term, and consequences of default. It is your IOU to the lender.

You sign it at closing along with the deed of trust. The note governs the financial terms of your loan for its entire life. Every detail of your repayment obligation lives in this document, which is why understanding it matters before you sign.

What the Promissory Note Contains

A mortgage promissory note is a detailed document that covers every financial aspect of your loan. Here is what you will find inside:

  • Loan amount (principal) - The exact dollar amount you are borrowing.
  • Interest rate - Fixed or adjustable, expressed as an annual percentage.
  • Monthly payment amount - What you will owe each month, including principal and interest.
  • Payment schedule - When payments are due (typically the 1st of each month) and where to send them.
  • Loan term - How long you have to repay, usually 15 or 30 years.
  • Late fee provisions - What penalty applies if your payment is late and how many days grace you get.
  • Prepayment penalties - Whether you can pay extra or pay off the loan early without a fee.
  • Default and acceleration clauses - What happens if you stop making payments, including the lender's right to demand full repayment.

Types of Promissory Notes

Not all promissory notes are the same. The type you sign depends on the loan program and terms you choose:

  • Fixed-rate note: The interest rate never changes for the life of the loan. Your principal and interest payment stays the same from month one to the final payment.
  • Adjustable-rate note (ARM): The rate changes periodically based on the terms spelled out in the note, tied to a financial index.
  • Balloon note: Monthly payments are calculated as if the loan amortizes over a longer term, but a large lump-sum payment is due at the end of a shorter period (often 5 or 7 years).
  • Interest-only note: You pay only the interest for an initial period, then payments increase to cover principal and interest for the remaining term.

Most Texas homebuyers sign a fixed-rate promissory note. It provides predictable payments and long-term stability, which is especially valuable in a market where property taxes and insurance costs can rise over time.

The Note vs the Deed of Trust

These two documents are signed together at closing but serve different purposes. Understanding the difference helps you know your rights and obligations:

  • The note creates your personal obligation to repay. It is your promise to the lender, backed by your credit and income.
  • The deed of trust secures that obligation against the property. It gives the lender the right to foreclose if you default.
  • The note follows you - your personal promise to repay exists regardless of who owns the property.
  • The deed of trust follows the property - the lien stays with the house even if it is sold to a new owner (unless the loan is paid off).

In short: the note is your word (backed by your signature) to pay the money back. The deed of trust is the lender's insurance policy that uses your home as collateral.

What Happens When You Refinance

Refinancing means replacing your existing mortgage with a new one. Here is how it affects your promissory note:

  • Your original note is paid off in full and marked as satisfied by the lender.
  • A new promissory note is created with your new loan amount, rate, term, and monthly payment.
  • The old deed of trust is released and a new one is recorded in the county records.

Every refinance replaces both documents. That is why you go through a full closing process again, even if you stay with the same lender. The old note is canceled and a fresh obligation begins.

Patrick's Take

"The promissory note is the most important document you'll sign at closing. It is your commitment to repay the loan. Read it carefully -- the rate, the payment, the term. If anything doesn't match what you agreed to, ask before you sign. I review every note with my clients before closing to make sure the terms match exactly what we locked in."
PF
Patrick Kevin Fagan
Patrick Kevin Fagan

Patrick Kevin Fagan

Loan Officer and Realtor, AXEN Realty LLC

License: 454749

Have Questions About Your Mortgage Documents?

Patrick walks every client through their promissory note before closing. Get clarity on all your mortgage documents.

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