A mortgage is a security instrument that places a lien on real property to secure repayment of a loan. It involves two parties, the borrower and the lender, and gives the lender the right to foreclose and force a sale if the borrower defaults. The debt itself lives in a separate promissory note that the mortgage secures.
What Is a Mortgage?
A mortgage is a recorded contract that creates a lien on real property, giving the lender a security interest until the loan is repaid. Per Nolo and the Consumer Financial Protection Bureau, a mortgage involves two parties, the borrower and the lender, and is distinct from the promissory note, which is the actual promise to repay the debt.
In commercial real estate, the mortgage is one piece of a larger collateral package. Per the Wiss commercial-mortgage guide, a commercial loan is typically secured by the mortgage or deed of trust plus an assignment of leases and rents, UCC financing statements, an environmental indemnity, and guaranty agreements. The mortgage establishes the lien; the other documents perfect the lender's claim on income, fixtures, and personal property.
Per Nolo, mortgages are most often foreclosed judicially, meaning the lender must file a lawsuit and obtain a court judgment before selling the property. That path is slower and costlier than the non-judicial foreclosure available under a deed of trust, which is why the choice of instrument is set by state law and lender preference.
Feature | Mortgage |
Parties | Two: borrower and lender |
What it does | Creates a lien securing the promissory note |
Foreclosure | Usually judicial, through the courts |
Related documents | Note, assignment of leases and rents, UCC filings, guaranties |
State usage | Common in lien-theory states that favor judicial foreclosure |
Why a Mortgage Matters
A mortgage matters because it turns a loan into secured debt, ranked by lien priority against every other claim on the property. Per the Wiss guide, the mortgage lien determines who gets paid first in a foreclosure, so its recording date and priority position drive recovery for lenders and losses for junior claimants.
The quotable point for an operator: a mortgage does not create the debt, it secures it, so the borrower's obligation to pay lives in the note while the lender's power to seize the asset lives in the mortgage. Understanding that split matters when a note is sold, assigned, or securitized separately from servicing rights.
Example
A borrower buys an office building for $10,000,000 with a $6,500,000 loan at 65% loan-to-value. The lender records a first mortgage. Years later the borrower defaults with $6,000,000 outstanding, and a contractor holds a $400,000 mechanic's lien recorded after the mortgage. The property sells at a judicial foreclosure for $6,200,000.
Claim | Priority | Amount owed | Recovery |
First mortgage | 1 | $6,000,000 | $6,000,000 |
Mechanic's lien | 2 | $400,000 | $200,000 |
Because the mortgage was recorded first and holds priority, the lender collects its full $6,000,000 from the $6,200,000 sale. Only the remaining $200,000 flows to the junior mechanic's lien, which absorbs a $200,000 shortfall on its $400,000 claim. Lien priority, fixed by the mortgage, controls who is made whole and who is not.
Variations and Edge Cases
A mortgage is not uniform: recourse, priority, and structure shift with the loan and the jurisdiction. It may be first or second in priority, recourse or non-recourse to the borrower, tied to a single property or blanketed across several. The table below covers variants an operator should confirm before closing.
Variant | Treatment |
First vs second mortgage | Priority set by recording order; the first is paid before the second in foreclosure |
Recourse vs non-recourse | Recourse reaches the borrower's other assets; non-recourse is limited to the collateral, subject to carve-outs |
Purchase-money mortgage | Secures the loan used to buy the property, often taking special priority |
Blanket mortgage | A single mortgage covering multiple properties as combined collateral |
Deed of trust states | Many states use a deed of trust instead, enabling faster non-judicial foreclosure |
The common mistake is treating the mortgage and the note as one document. They are separate, and a lender can sell the note while retaining or transferring the mortgage, which affects who has standing to foreclose.
Mortgage vs Deed of Trust
A mortgage is often confused with a deed of trust, and the difference is party structure and foreclosure. A mortgage has two parties and is usually foreclosed judicially, through a court. A deed of trust has three parties, adding a neutral trustee who holds title and can conduct a non-judicial foreclosure under a power-of-sale clause, generally faster and cheaper.
The distinction is practical, not cosmetic. Per Nolo, non-judicial foreclosure under a deed of trust is quicker and less expensive than the judicial foreclosure a mortgage typically requires. State law usually dictates which instrument is used, so a lender operating across states may hold mortgages in some and deeds of trust in others for economically identical loans.
Frequently Asked Questions
What is the difference between a mortgage and a promissory note?A promissory note is the borrower's written promise to repay the loan, stating the amount, rate, and terms. A mortgage is the security instrument that places a lien on the property to secure that note. The note creates the debt; the mortgage gives the lender the right to foreclose if the debt goes unpaid.
How does a mortgage foreclosure work?Per Nolo, a mortgage is most often foreclosed judicially, meaning the lender files a lawsuit and a court must issue a judgment before the property is sold at auction. The borrower can raise defenses in court. This process is generally slower and more expensive than the non-judicial foreclosure used with a deed of trust.
What is a first mortgage?A first mortgage is the mortgage lien with the highest priority against a property, usually the earliest recorded. In a foreclosure it is paid in full before any second mortgage or junior lien. Priority position, set by recording order, determines the order of recovery when sale proceeds fall short of total debt.
Related Terms
Deed of Trust
Loan to Value Ratio
Non-Recourse Loan
Permanent Loan
Mechanic's Lien