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What Is a Promissory Note and How Does It Work in M&A?

In the complex and high-stakes world of mergers and acquisitions (M&A), the use of a promissory note can play a pivotal role in deal structuring. A promissory note is more than a mere IOU-it's a binding legal document that outlines a buyer's promise to pay a specific amount to a seller under agreed-upon terms. It serves as a flexible financing tool and can be used to bridge gaps between purchase price expectations and available capital. Understanding how promissory notes work in M&A can help protect your interests and facilitate a smoother transaction.

Contact us by either using the online form or calling us directly at 414-253-8500 for legal assistance regarding mergers, acquisitions, and deal financing structures.


What Is a Promissory Note?

A promissory note is a written, legally enforceable agreement wherein one party (the "maker" or buyer) commits to paying a definite sum of money to another party (the "payee" or seller) at a future date or over time. Promissory notes are commonly used in commercial and private transactions where full payment is deferred.

In the M&A context, the promissory note is often used when:

  • The buyer does not pay the entire purchase price upfront.

  • Seller financing is part of the deal.

  • There is a need to align risk between buyer and seller over a transition period.

These notes can include terms such as interest rates, repayment schedules, default provisions, and collateral, depending on how the deal is structured.


Promissory Notes in M&A Transactions

Why Use a Promissory Note?

In mergers and acquisitions, promissory notes provide flexibility and liquidity. Instead of demanding a full cash payment at closing, the seller may accept a promissory note to:

  • Allow the buyer time to generate income from the acquired business.

  • Facilitate a quicker closing with less third-party financing.

  • Maintain an ongoing stake in the business's performance.

Common Scenarios for M&A Promissory Notes

  1. Seller Financing

    • The seller agrees to finance part of the purchase price.

    • A promissory note outlines the repayment schedule and interest terms.

  2. Earn-Out Arrangements

    • A promissory note may be contingent on performance targets.

    • Payments hinge on hitting revenue or EBITDA milestones.

  3. Holdbacks or Escrow-Like Mechanics

    • Part of the purchase price is deferred to account for indemnification obligations.

    • The note may be canceled or reduced if specific risks materialize.

  4. Tax Planning

    • Structured payments via promissory notes can impact tax timing for both buyer and seller.


Key Elements of a Promissory Note in M&A

When crafting or reviewing a promissory note as part of a business acquisition, several critical components should be carefully analyzed:

1. Principal Amount

  • The total value to be paid to the seller.

2. Interest Rate

  • May be fixed or variable, depending on prevailing rates or contract negotiation.

3. Payment Schedule

  • Monthly, quarterly, or annual payments.

  • Lump sum or amortized payments.

4. Maturity Date

  • Specifies the due date for full repayment.

5. Prepayment Terms

  • Can the buyer pay early without penalty?

6. Default Provisions

  • Remedies in the event of missed payments.

  • Often includes acceleration clauses or late fees.

7. Security and Collateral

  • Whether the note is secured by business assets or personal guarantees.

8. Conversion or Subordination Clauses

  • Some notes allow conversion into equity or are subordinated to other debt.


Advantages for Buyers and Sellers

For Buyers:

  • Lower upfront capital requirement.

  • Flexibility to fund the deal without immediate financing.

  • Aligns cash flow with repayment obligations.

For Sellers:

  • Opportunity to earn interest on deferred payments.

  • Potential leverage in structuring favorable terms.

  • Can retain security interests to protect against buyer default.

However, promissory notes also carry risks, particularly for sellers who may bear credit exposure if the buyer fails to perform.


Risks and Legal Considerations in Using Promissory Notes for M&A

While promissory notes offer financial flexibility, they also introduce risk exposure, particularly when the buyer's ability to repay is uncertain or when the business's future cash flows are not guaranteed.

Key Risks for Sellers:

  • Default Risk - The buyer may default on the note, leaving the seller unpaid.

  • Business Decline Post-Sale - If the business underperforms, the buyer may lack the revenue to make payments.

  • Enforcement Challenges - Sellers may face legal hurdles in enforcing the note, especially across state lines or if assets have been dissipated.

Key Risks for Buyers:

  • High-Interest Obligations - Some seller notes include above-market interest rates.

  • Acceleration Clauses - Missing a payment could result in the entire balance becoming due.

  • Secured Notes - The buyer may risk losing assets if the note is backed by collateral.

Legal Protections and Structuring Options

To help ensure a secure transaction, both parties should consult with an experienced M&A attorney to structure the note properly and mitigate risk. Protective clauses may include:

  • Security Agreements

  • Personal Guarantees

  • Intercreditor Agreements if other lenders are involved

  • Choice of Law and Jurisdiction Clauses

  • Dispute Resolution Provisions, including arbitration or mediation

For business owners navigating a transaction, aligning your legal documents with financial realities is crucial. Consider reviewing your purchase and sale agreement alongside your promissory note to ensure both are integrated and enforceable.


Promissory Note vs. Earn-Out: What's the Difference?

While both tools defer part of the purchase price, they function differently:

Feature Promissory Note Earn-Out Clause

Payment Obligation

Fixed, unconditional

Contingent on performance

Risk Allocation

More risk on seller

Risk is more evenly split

Legal Status

Debt instrument

Contractual contingent payment

Tax Implications

More predictable

Varies with timing and realization

Enforceability

Typically easier to enforce

Often subject to performance disputes

In some cases, both mechanisms may be used, depending on the deal's complexity and the parties' comfort with risk sharing.


How Promissory Notes Affect Purchase Price Adjustments

Promissory notes can be used strategically to address purchase price adjustments:

  • Working Capital Adjustments: If the business closes with more or less working capital than anticipated, the note can be adjusted to reflect that delta.

  • Indemnification Holdbacks: Some buyers structure indemnification as a reduction in the promissory note, rather than establishing a separate escrow.

  • Performance Metrics: Future financials may be tied to the value of the note or repayment obligations, creating a hybrid between a note and an earn-out.


Tax Implications of Promissory Notes in M&A

Both parties should evaluate the tax consequences of using a promissory note in a sale transaction:

  • Installment Sale Treatment: Promissory notes may qualify sellers for installment sale tax treatment, deferring gain recognition.

  • Interest Income: The seller must report interest as ordinary income.

  • Buyer Deductions: Buyers generally cannot deduct principal payments, but interest may be deductible if business-related.

It is crucial to work with both legal and tax professionals to assess the full implications.


When Should You Use a Promissory Note in M&A?

Consider using a promissory note if:

  • You need to bridge a valuation gap between buyer and seller.

  • The buyer lacks sufficient capital but has credible cash flow projections.

  • The seller is willing to participate in the risk of the business's future.

  • You're seeking a quicker close without third-party financing.

These transactions can be particularly useful for closely held businesses, family transitions, or private sales where traditional financing is limited or less attractive.


Contact an M&A Attorney for Promissory Note Structuring

If you're considering a business acquisition or sale and want to include a promissory note as part of the transaction, a well-drafted and properly integrated agreement is critical. Our attorneys can help you:

  • Draft legally sound promissory notes.

  • Structure payment terms that reflect your financial goals.

  • Coordinate tax-efficient strategies.

  • Navigate seller financing and buyer protections.

Contact Heritage Law Office today to discuss your M&A plans. Call 414-253-8500 or use our secure contact form to schedule a consultation.


Frequently Asked Questions (FAQs)

1. What is the purpose of a promissory note in a business acquisition?

A promissory note in a business acquisition serves as a legal document outlining a buyer's obligation to pay a portion of the purchase price over time. It's often used when the buyer cannot pay the full price upfront or when seller financing is part of the deal structure.

2. Can a promissory note be secured by business assets?

Yes, a promissory note can be secured by business assets or other collateral. This adds a layer of protection for the seller by granting the right to repossess or claim assets if the buyer defaults on payments.

3. How does a promissory note differ from an earn-out?

While both defer payments, a promissory note includes fixed payments under set terms, regardless of business performance. An earn-out, on the other hand, ties payments to specific financial goals or milestones, making it performance-contingent.

4. Are there tax consequences when using a promissory note in a sale?

Yes, the seller may be eligible for installment sale tax treatment, deferring capital gains. However, interest income from the note must be reported annually. Buyers may deduct interest (but not principal) if used for business purposes. Consulting a tax advisor is essential.

5. What happens if a buyer defaults on a promissory note?

If a buyer defaults, the seller may enforce the note through legal action, which could include collection proceedings or asset seizure if the note is secured. Well-drafted default clauses and remedies are essential for protecting seller interests.

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