Banking Brief: Financial Services Insights

In commercial lending, the difference between a guarantor and a co-borrower can directly affect whether a lender can enforce a loan. One common and costly mistake is mislabeling a party as a co-borrower when they are really acting as a guarantor.

Although this may seem like a small drafting issue, courts look beyond labels to the substance of the transaction. Getting it wrong can weaken a lender’s ability to collect in the event of default and introduce avoidable legal challenges. Understanding these distinctions and structuring loans accordingly is critical to protecting your position.

The Difference Between a Guarantor and Co-Borrower Matters in Commercial Loans

The distinction between a guarantor and a co-borrower is simple:

• A guarantor is a party that commits to repaying a loan if the primary borrower defaults, but does not receive the loan proceeds.
• A co-borrower is directly liable to repay the loan and is generally a recipient or direct beneficiary of the loan proceeds.

Lenders may believe that labeling a party as co-borrower enhances their leverage. However, courts generally look to substance over form. If a “co-borrower” does not receive or use the loan proceeds, courts are likely to recharacterize them as a guarantor, which opens the door to a number of specific defenses to challenge liability.

Why Mislabeling a Guarantor as a Co-Borrower Creates Risk

Guarantors can leverage common law defenses to challenge liability. These include arguments that the lender materially altered loan terms without consent, such as extending repayment deadlines, or impaired the value of collateral securing the loan. A guarantor might also claim the lender failed to diligently pursue the primary borrower. These defenses are usually waived in guaranties, but not in promissory notes.

Choosing the Right Loan Structure

Aligning the loan structure with the parties’ actual roles is critical to avoid disputes and ensure enforceability. Simply adding an intended guarantor as a “co-borrower” to a standard note or loan agreement leaves the lender vulnerable if a court reclassifies the party as a guarantor.  The waivers of defenses contained in a guaranty will be missing.

Guarantors are appropriate when a party provides credit support without receiving loan proceeds. Common scenarios include:

• A parent company guaranteeing a subsidiary’s loan, or
• A business owner backing a company’s debt.

Co-borrowers should be designated in the rare situation when both parties actively receive loan proceeds. Such a situation may occur when two sister companies need working capital, but aren’t sure how much. A loan can be made to them jointly in which case they would each be a co-borrower as to the amount they individually borrow or receive. In this situation, each co-borrower will be a surety as to the amount the other co-borrower received. An astute draftsman will add suretyship waivers to the promissory note and loan agreement to address this.

Bottom Line for Lenders: Precise Documentation Is Protection

Effective loan documentation is a lender’s best defense against enforcement risks. A robust guaranty agreement should include explicit waivers of common law defenses, ensuring courts uphold the lender’s rights. Loan agreements with “co-borrowers” must clearly reflect the party’s use and benefit from the loan proceeds to withstand judicial scrutiny.

Most courts focus on the economic reality of the transaction, making tailored documentation essential to prevent recharacterization and preserve a lender’s position.