An earnout is a provision in an HVAC business sale that lets you receive additional purchase price payments in the future — if the business hits specific performance targets after closing. In theory, earnouts bridge valuation gaps when buyers and sellers disagree on what the business is worth. In practice, poorly structured earnouts are one of the most common ways HVAC sellers leave money on the table.
When Earnouts Are Used in HVAC Deals
Buyers propose earnouts when they're uncertain about whether your reported financial performance will continue after you leave. Common triggers: a business that grew rapidly in the last 12 months (buyer questions sustainability), significant owner-dependence (buyer worried about customer/revenue loss after transition), or a valuation gap where the seller wants a higher price than the buyer will commit to at close.
From a buyer's perspective, earnouts are a risk management tool. From a seller's perspective, they're a deferred payment that may or may not arrive. The goal in negotiating earnouts is to maximize the upfront payment and structure any earnout so that hitting the targets is within your control and the metrics are objective and unmanipulable.
Types of HVAC Earnout Structures
| Earnout Type | Measurement | Seller Risk Level | Notes |
|---|---|---|---|
| Revenue-Based | Gross revenue hitting targets | Medium | Hard for buyer to manipulate; more seller-friendly |
| EBITDA-Based | EBITDA hitting targets | High | Buyer controls costs post-close; can erode EBITDA easily |
| Maintenance Agreement Count | Service agreement roster grows | Low-Medium | Objective metric; good for HVAC; hard to fake |
| Customer Retention | % of customers retained after close | Medium | Good alignment; buyer also incentivized to retain |
| Employment-Based | Seller stays employed for X years | Low (for seller) | Essentially deferred compensation; cleaner than performance metrics |
How to Negotiate Earnout Terms
- Minimize the earnout as a % of total price. Push to get 80–90% of your value at close. A deal where 40% of the purchase price is at risk in an earnout is a bad deal for you.
- Use revenue metrics, not EBITDA. Buyers control costs after they own the business. An EBITDA earnout gives them a tool to eliminate your payday by increasing expenses.
- Require buyer obligations. If the earnout is tied to revenue growth, the buyer should be required to maintain marketing spend, staffing levels, and not raise prices in ways that tank volume.
- Short measurement periods. 1–2 years is better than 3–5 years. The longer the earnout period, the more can go wrong that's outside your control.
- Acceleration clauses. If the business is sold again before the earnout period ends, the full earnout should become immediately payable. Protect yourself from an early re-sale.
- Audit rights. You should have the right to audit the buyer's financial records during the earnout period to verify that the metrics are being calculated correctly and honestly.
Also in the Lightning Path Guide Series
Own a plumbing business? See our companion guide: Earnout Structures When Selling a Plumbing Business
DISCLAIMER: The information on this page is provided for general informational and educational purposes only. It does not constitute — and should not be construed as — financial advice, investment advice, legal advice, tax advice, or any other form of professional advice. Nothing on this site creates a professional advisory relationship between you and Lightning Path Partners. Business valuations, transaction structures, and market conditions discussed herein are general in nature and may not apply to your specific situation. Always consult a qualified financial advisor, M&A attorney, business broker, or CPA before making any business or financial decisions. Full Terms of Use →
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