Table of Contents
Security Interest Defined
A security interest means a legal claim or lien granted in favour of a lender or secured party over defined property—real estate or personal property—to secure repayment of money lent or performance of some other obligation. Security interests can arise by operation of law or by agreement, typically documented in a loan agreement. If the party that grants the security interest (the debtor) defaults on its obligation, then the holder of the security interest (such as a bank or other secured creditor) can enforce its rights through legal enforcement procedures, which may include taking possession of the asset and selling it to pay the secured obligation. Security interests enable lenders to charge lower interest rates by reducing their risk, thereby decreasing the cost of borrowing for the borrower. If a security interest is granted, the exchange is known as a ‘secured transaction.’
Common examples of security interests include mortgages, auto loans, business loans, and liens. For instance, a real estate mortgage or deed of trust is a security interest granted in favour of the lender, where the borrower pledges the property as collateral for securing repayment of the mortgage loan.
Under a security agreement, the debtor’s personal property (non-real estate, as defined by law) and intangibles, such as intellectual property, are often used as collateral.
Other examples of collateral include inventory, equipment, machinery, farm products and crops, appliances, furnishings, fixtures, car, accounts (including accounts receivable and deposit accounts), contract rights, and general intangibles. In some cases, the debtor may retain possession of the collateral while granting a security interest. If the debtor defaults on repayment, the creditor (also called the secured party, often a bank) will be able to enforce the security interest and may keep or sell the collateral to recover the money owed. Multiple creditors may have interests in the same collateral, and the order of priority is determined by law.
Governing Law
The legal framework that governs security interests can be complex, but in the United States the Uniform Commercial Code (UCC) serves as the foundation for most secured transactions involving personal property. The UCC defines a security interest as a legal claim in certain assets that secures payment or performance of an obligation. This code standardizes how security agreements, financing statements, and other legal documents are created and enforced, providing clarity and protection for both secured lenders and borrowers.
To create a legally enforceable security interest under the UCC, a security agreement must be in writing, signed by the debtor, and must clearly describe the collateral—whether it is equipment, inventory, accounts, or other personal property. This ensures that both parties understand which specific assets are being used to secure the loan or obligation.
Once a security agreement is in place, the secured party must “perfect” the security interest to establish priority over other creditors. Perfection is typically achieved by filing a financing statement with the appropriate government office or, in some cases, by taking possession of the collateral. This step is crucial because it publicly records the secured party’s claim, ensuring that their interest in the collateral takes precedence if the borrower defaults or files for bankruptcy.
Another important concept under the UCC is “attachment.” Attachment occurs when three conditions are met: the lender gives value (such as providing a loan), the debtor has rights in the collateral, and the debtor signs the security agreement. Once attached, the security interest is enforceable between the parties, and after perfection, it is enforceable against other creditors as well.
While the UCC governs most personal property security interests, other laws may apply in specific situations. For example, state laws regulate security interests in real property, such as mortgages, and federal bankruptcy laws determine how secured creditors are treated if a borrower files for bankruptcy. In the event of a borrower defaulting on a loan secured by real property, the lender may initiate foreclosure proceedings to recover the debt, following specific legal procedures that vary by jurisdiction.
Understanding the governing law for security interests is essential for lenders, borrowers, and businesses involved in secured credit. By following the requirements set out in the UCC and other applicable laws, parties can ensure their security interests are properly established, perfected, and protected—minimizing risk and enabling access to capital with greater confidence.