How to Resolve Disputes Over Earn-Out Provisions After Selling a Business in Ontario

Selling a successful business in Ontario is the culmination of years of hard work. To bridge the gap between what the seller wants and what the buyer is willing to pay upfront, Mergers and Acquisitions (M&A) in cities like Toronto, Waterloo, and Ottawa frequently include an “earn-out” provision. This means the seller will receive additional purchase funds down the road, provided the business hits specific financial targets, such as gross revenue or EBITDA margins, after the sale closes.

Unfortunately, earn-outs are notorious for causing bitter post-closing disputes. 🚩 Once the buyer takes control of the company, they control the accounting. It is shockingly common for a buyer to suddenly increase executive salaries, heavily invest in marketing, or change accounting methods-all of which artificially suppress the company’s EBITDA, ensuring the seller misses their targets and loses their earn-out bonus. Fortunately, Ontario law provides robust mechanisms for sellers to fight back against this bad-faith behaviour.

Step-by-Step Process for Resolving Earn-Out Disputes

If you suspect the buyer of your business is manipulating the books to avoid paying your multi-million dollar earn-out, you cannot simply complain; you must build a legally sound case. Here is how most business sellers in Ontario navigate this high-stakes corporate dispute.

Step 1: Trigger the Dispute Resolution Mechanism

Look directly at your Share Purchase Agreement (SPA) or Asset Purchase Agreement. Almost all professionally drafted M&A contracts in Canada contain a specific mechanism for challenging earn-out statements. 📄 Usually, the buyer has to deliver an “Earn-Out Statement” at the end of the year. You typically have a strict window (often 30 to 45 days) to file a formal “Notice of Objection.” Missing this deadline can legally forfeit your right to the money.

Step 2: Demand Full Access to Financial Records

Once you object, you have the right to investigate. The buyer is legally obligated to provide you and your legal team with access to the company’s financial ledgers, general journals, and management accounts. You are looking for expenses that were not incurred in the ordinary course of business, such as the buyer charging massive “management fees” from their parent company to drain the acquired company’s profits.

Step 3: Hire an Independent Forensic Accountant

Lawyers argue the law, but accountants prove the math. You must hire an independent Chartered Professional Accountant (CPA) who specializes in forensic accounting or business valuations. 📊 They will review the buyer’s financials to determine if they deviated from Generally Accepted Accounting Principles (GAAP) or violated the specific calculation formulas defined in your original purchase agreement.

Step 4: Proceed to Mediation or Arbitration

Because M&A contracts often involve sensitive trade secrets, most agreements require disputes to be handled outside of the public courts. You will likely be required to attend mandatory mediation. If mediation fails, the matter is usually sent to binding arbitration in Ontario, or occasionally, to the Superior Court of Justice (Commercial List) if no arbitration clause exists. During this phase, your lawyer will argue that the buyer breached the Canadian legal principle of “good faith and honest performance” in contracts.

How Much Does it Cost in Ontario?

Litigating an M&A dispute is a heavy-weight fight between highly resourced parties. Because earn-outs are usually valued in the hundreds of thousands or millions, the legal fees match the high stakes. 💰 As of May 2026, standard costs in CAD include:

• Initial Review and Notice of Objection: Reviewing the financials and drafting the objection typically costs $3,000 to $6,000 CAD.
• Forensic Accounting Fees: An independent CPA firm will generally charge between $10,000 and $25,000 CAD to audit the buyer’s earn-out statement and produce an expert report.
• Mediation Costs: Hiring a private commercial mediator in Toronto usually costs $4,000 to $8,000 CAD per day, often split between the parties.
• Litigation or Arbitration: Taking a complex earn-out dispute all the way through a formal arbitration hearing or a Superior Court trial easily ranges from $50,000 to $100,000+ CAD in lawyer fees.

How Long Does the Process Take?

The timeline for resolving an earn-out dispute heavily depends on the venue. If both parties are motivated, the independent accounting review and private mediation can resolve the issue in 4 to 8 months. If the dispute escalates to binding private arbitration, expect the process to take 12 to 18 months. If the case must go through the public Superior Court of Justice, you will likely be waiting 2 to 4 years for a final judgment.

Frequently Asked Questions (FAQ)

Author: lawyerinfo.ca