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Corporate

How does an earn-out work when selling a business in Ontario?

TSL Written by the Treadstone Law team· Updated June 2026

An earn-out is a deal structure where a portion of the purchase price is paid after closing, contingent on the business hitting certain financial targets — typically revenue, EBITDA, or gross profit — over a specified period. Earn-outs are common when the buyer and seller disagree on the business's value or future performance.

In Ontario business sales, earn-outs create significant post-closing complexity. The seller must usually continue working in or overseeing the business during the earn-out period. Disputes often arise over how performance is measured, whether the buyer's post-closing decisions (changing pricing, reducing marketing spend) artificially depressed the earn-out metrics, and how accounting policies are applied.

To minimize disputes, the earn-out agreement should specify: the exact financial metric, accounting methodology, the buyer's post-closing operating obligations (or restrictions), how disputes are resolved (often an independent accountant), and what happens if the business is sold again before the earn-out period ends.

Sellers should be cautious about earn-outs that represent a large share of the total price — once you hand over the keys, your ability to influence results diminishes considerably.

Key takeaways

  • An earn-out ties part of the purchase price to post-closing business performance.
  • Disputes over measurement and buyer influence on results are very common.
  • Define the metric, accounting methodology, and buyer operating obligations precisely.
  • Large earn-out portions are risky for sellers who lose operational control at closing.
This is general information, not legal advice. It doesn’t create a lawyer–client relationship, and the rules can change. For advice on your situation, a Treadstone corporate lawyer can help.
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