How to structure a seller note in Mexico: rate, term and conditions

A seller note is a deferred payment obligation in an M&A transaction for a Mexican SME: the buyer owes you a defined amount, with interest, over a defined period after closing. Even so, it is often one of the most poorly negotiated parts of the deal: many sellers accept it as an inevitable condition without understanding that its terms are fully negotiable and that the difference between a well-structured note and a badly negotiated one can mean millions of pesos in real consideration received.

A seller note is not a favor to the buyer; it is deferred consideration. Like any debt instrument, its terms — rate, term, security, prepayment conditions, default events — are negotiable before the LOI and much harder to change afterward.

This note explains how to structure a seller note that protects the seller, which terms are negotiable, and when to reject a structure that makes no economic sense.

What is a seller note and why does it exist?

It exists because most buyers in Mexican SME M&A do not have the liquidity to pay 100% in cash at closing. The seller note closes the gap between what the buyer can pay today and the agreed enterprise value.

In Mexican SME transactions, seller notes typically represent 30–55% of total enterprise value. A transaction at MXN $20M enterprise value with 15% cash at closing and 50% seller note means the buyer pays MXN $3M at closing and owes MXN $10M plus interest over the note term. The remaining 35% is contingent.

The seller note is not subordinated charity — it is a contractual debt obligation. The buyer must pay it regardless of post-closing performance (unlike the contingent tranche, which depends on performance). A seller who understands this distinction negotiates the note very differently from one who treats it as a concession.

Three reasons seller notes exist in Mexican SME M&A:

1. Buyer liquidity constraints
2. Seller commitment signal (buyer’s argument)
3. Financing gap bridge before bank debt is arranged

See LOI and consideration simulator.

What parameters define the real value of a seller note?

Five parameters determine the economic value of a seller note. Each is negotiable before the LOI is signed:

1. Interest rate: The annual interest rate on the principal. In Mexican SME transactions the market range is 10–14% per year. Below 10% is below market — the seller is effectively providing subsidized financing. Above 14% is aggressive but achievable in higher-risk deals. The rate should reflect the buyer’s credit risk, not a default market rate.
2. Term: The period over which principal and interest are paid. Standard range: 2–4 years. A 5-year note at 12% on MXN $10M principal generates MXN $6M in total interest. A 3-year note at the same rate generates MXN $3.6M. Shorter is better for the seller — time reduces present value and increases counterparty risk.
3. Payment structure: Bullet (principal at maturity plus periodic interest) vs amortizing (principal and interest paid periodically). Amortizing is better for the seller — it reduces exposure over time and ensures the buyer is actually paying down the debt.
4. Security: What secures the note. Options: pledge of shares of the acquired company (most common), personal guarantee of the buyer, pledge of specific assets. A note without security is an unsecured creditor position — the seller should push for at least a share pledge.
5. Prepayment: Can the buyer pay early? Under what conditions? With or without penalty? A prepayment option is generally favorable for the seller — receiving money earlier is better than later.

See consideration simulator.

What are 2024–2025 market parameters for seller notes in Mexico?

What does a real (anonymized) seller note case look like in Mexico?

A B2B industrial cleaning services company with MXN $3.2M normalized EBITDA sold at 4x — MXN $12.8M enterprise value. The buyer proposed an initial consideration structure: 20% cash at closing (MXN $2.56M), 45% seller note (MXN $5.76M) at 9% annual for 4 years bullet, 35% contingent. No security on the note.

The seller’s advisor pushed back on three parameters: rate (9% to 12%), structure (bullet to monthly amortizing), and security (added pledge of shares of the acquired company).

Final agreed structure: 20% cash at closing (MXN $2.56M), 45% seller note (MXN $5.76M) at 12% annual monthly amortizing over 3 years, secured by share pledge, 35% contingent.

Impact of the negotiation:

• Original note total received: MXN $5.76M principal + MXN $2.07M interest (9% × 4 years bullet) = MXN $7.83M
• Negotiated note total received: MXN $5.76M principal + MXN $1.10M interest (12% amortizing, 3 years) = MXN $6.86M total but received faster with security
• Additionally: 3-year vs 4-year term cut counterparty risk exposure by 12 months
• The share pledge meant buyer default could trigger return of shares — giving the seller real recourse

The negotiation did not change enterprise value. It changed what the seller actually received — and when.

When should the seller reject a seller note structure?

Three situations where the seller should reject the note structure and renegotiate before signing:

1. Rate below 10% without justification. Below 10% is subsidized financing. If the buyer cannot justify a market rate, the seller should push for a higher rate or convert part of the note into additional cash at closing.
2. Term longer than 4 years without reinforced security. An unsecured 5-year note is significant credit risk. Five years is enough time for the buyer’s financial situation to change materially. If the term exceeds 4 years, the seller needs strong security and personal guarantees.
3. Bullet note without security. A bullet note means the seller gets no principal reduction until maturity. If the buyer defaults in year 3 of a 4-year bullet, the seller has only received interest and faces a large unsecured claim. An amortizing structure reduces this risk over time.

What do buyers and sellers ask about seller notes in Mexico?

Is the seller note mandatory in an M&A transaction?

No. It is common in the Mexican SME segment because most buyers do not have full liquidity at closing, but it is not structurally required. A seller with multiple competing buyers can negotiate for a higher percentage of cash at closing.

Are interest payments on the note deductible for the buyer?

Yes. Interest payments on debt are deductible for the buyer under Mexican tax law, subject to thin capitalization rules (Article 28 LISR). That makes the note economically attractive to the buyer.

What if the buyer does not pay the note?

The seller can accelerate the note (demand immediate full payment) and seek legal remedies under Mexican contract law. If the note is secured by a pledge of shares, the seller may be able to recover the acquired company's shares. In practice, enforcement for default is slow and costly. The best protection is to structure the note correctly from the start.

Can I use a calculator to model my note?

Yes. The consideration simulator models principal, interest rate and term — total received, monthly payment and schedule. Use it before negotiating the LOI to understand the economic difference between note structures.