Expert answer

What happens if a warranty turns out to be wrong after closing?

You have a claim for breach of warranty — but how much it is worth was decided when the agreement was drafted. Survival periods limit how long you can bring it, a basket sets a minimum before anything is payable, and a cap limits the total. A small loss discovered late may be entirely unrecoverable by design.

Reviewed

Buyers tend to read representations and warranties as assurances and sellers read them as a negotiated allocation of risk. The seller’s reading is the operative one, because the limitation provisions sitting a few clauses later determine what any breach is actually worth.

Survival periods decide whether you are in time

Most warranties survive closing for a stated period — commonly twelve to twenty-four months for general matters, longer for tax, and sometimes indefinitely for fundamentals like title and authority. A breach discovered after the period expires is generally not actionable regardless of how serious it is. Tax is carved out longer precisely because a reassessment can arrive years later.

Baskets and caps decide whether it is worth bringing

A basket is a threshold the buyer’s losses must exceed before any claim can be made. Whether it then pays from the first dollar or only the excess is a drafting choice with a real difference. A cap limits aggregate liability, often to a percentage of the price. Between them, a modest problem can be fully allocated to the buyer by agreement.

Where the money comes from

This is the practical question. A valid claim against a seller who has distributed the proceeds is worth what you can collect. A holdback, an escrow, or set-off against an outstanding vendor take-back turns the same entitlement into a recovery. Buyers who negotiate warranty protection without a funding source have negotiated half of it.

Act promptly and document it

Agreements usually require notice of a claim within a period of discovery and in a specified form. Keep the evidence of what you found and when, give notice properly, and do not let a survival period run while you investigate informally. Several otherwise good claims fail on notice rather than on merit.

Sources

This answer is checked against primary sources. Links were last confirmed on the dates shown.

  1. 01
    Treadstone LawLegal commentary
    Breach of Warranty After Closing — Ontario Business Sale
    treadstonelaw.ca·Checked Aug 26, 2026
  2. 02
    Treadstone LawLegal commentary
    Baskets and Deductibles in Business Sale Indemnities
    treadstonelaw.ca·Checked Aug 26, 2026
  3. 03
    Treadstone LawLegal commentary
    Buyer Representations in a Business Purchase — ON
    treadstonelaw.ca·Checked Aug 26, 2026
  4. 04
    Canada Revenue AgencyGovernment
    Selling a business
    canada.ca·Checked Aug 14, 2026

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