Share Purchase Agreements in Canada: Key Clauses Every Seller Must Understand
A Share Purchase Agreement (SPA) is the primary legal contract in any private company sale in Canada. It defines what the buyer is acquiring, the mechanics of how the purchase price is calculated and paid, and most critically, what happens when undisclosed problems surface after closing. The most heavily negotiated provisions are the representations and warranties, the indemnification regime (basket, cap, survival period), and any holdback or escrow arrangements. Sellers who do not understand these clauses before signing routinely accept liability exposure they intended to leave behind when they handed over the keys.
What Is a Share Purchase Agreement?
A Share Purchase Agreement is the binding contract between a seller and a buyer that governs the transfer of shares of a private corporation. When the SPA is signed and the conditions satisfied, ownership of the corporation with all its assets, contracts, employees, liabilities, and history transfers to the buyer.
The SPA is distinct from the Letter of Intent (LOI), which records agreement in principle on commercial terms but is largely non-binding. The SPA is fully binding. Every clause in it has real legal and financial consequences.
In Ontario, shares of a corporation incorporated under the Ontario Business Corporations Act (OBCA) are transferred by endorsing the share certificates and entering the transfer in the corporation’s share register under OBCA s. 25–26. The SPA governs the broader transaction; the OBCA governs the mechanics of how shares actually change hands.
There is no standard-form SPA in Canada. Every deal is negotiated from scratch or from a party’s preferred precedent. The buyer’s lawyer typically drafts the first version, which skews toward the buyer’s interests. A seller without legal representation reviewing that document is at a significant disadvantage.
The Key Clauses: What They Mean and Why They Matter
1. Purchase Price and Payment Mechanics
The SPA specifies not just the headline purchase price but how it is structured and when it is paid.
Locked-box vs. closing accounts. There are two main approaches to determining the final price:
- Locked-box: The price is fixed at a historical balance sheet date (the “locked-box date”). The seller warrants that no value has leaked out of the business since that date. Simpler to close, but the seller retains economic risk for any deterioration between the locked-box date and closing.
- Closing accounts (working capital adjustment): The price is adjusted after closing based on the actual net working capital (or debt and cash) delivered at closing versus a target. More common in Canadian private M&A. The mechanics of what is included in the working capital basket, how the target is set, who prepares the accounts, and on what accounting basis are significant negotiating points.
Deferred consideration: Where part of the price is not paid at closing through an earnout, vendor take-back (VTB), or escrow holdback the SPA defines the payment terms, triggers, and dispute mechanisms for each deferred element.
Earnout provisions: If the purchase price includes an earnout component (a payment contingent on post-closing performance), the SPA must define the metrics precisely, specify how the acquiring party may operate the business during the earnout period, and provide for independent dispute resolution. Vague earnout language is consistently the most litigated provision in private M&A.
2. Representations and Warranties
Representations and warranties (R&W) are the seller’s factual assertions about the business at the time of signing and at closing. They are the legal mechanism by which the buyer verifies the information disclosed in due diligence.
The disclosure schedule is as important as the representations themselves. Representations are qualified by the disclosure schedule; anything properly disclosed in the schedule is carved out from the warranty. Sellers must review the disclosure schedule meticulously; an inadequate disclosure creates warranty liability post-closing.
Knowledge qualifiers: Many representations are qualified by the seller’s knowledge; for example, “to the knowledge of the seller, there is no pending litigation.” The definition of “knowledge,” whether it is actual knowledge, constructive knowledge, or knowledge after reasonable inquiry, is negotiated and has material implications for the seller’s liability.
3. Survival Period
The survival period defines how long the seller’s representations and warranties remain actionable after closing. This is one of the most important and most negotiated provisions in the SPA.
From the seller’s perspective, shorter survival periods are better. Once the survival period expires, warranty claims are extinguished, and the seller’s post-closing liability disappears. Pushing for an 18-month general survival period (rather than the 24-36 months buyers often request) meaningfully limits exposure.
From the buyer’s perspective, the survival period must be long enough to discover what the representations were covering. A 12-month survival on environmental reps, for example, is almost certainly inadequate.
4. Indemnification
Indemnification is the mechanism by which the seller compensates the buyer for losses arising from a breach of a representation or warranty (or a specific identified risk). It is the financial heart of the SPA from a risk-allocation standpoint.
The indemnification regime is defined by four parameters:
Basket (deductible): The basket is the minimum aggregate claim amount that must be reached before the seller has any indemnification obligation. Claims below the basket are the buyer’s problem. A tipping basket means once the threshold is crossed, all losses (including those below the threshold) are recoverable. A deductible basket means only losses above the threshold are recoverable. Sellers prefer the deductible basket; buyers prefer the tipping basket.
In Canadian mid-market transactions, baskets typically range from 0.5% to 1.5% of the purchase price.
Cap: The cap is the maximum total amount the seller can be required to pay under the indemnification provisions. Sellers push for a low cap; buyers push for a high one.
For general rep and warranty breaches, caps commonly range from 10% to 30% of the purchase price in private mid-market deals. Fundamental representations (title to shares, authority, and capitalization) and fraud are typically subject to a higher cap, often 100% of the purchase price.
Carve-outs: Certain categories of loss may be specifically excluded from the indemnification regime, including consequential damages, punitive damages, lost profits, and losses already reflected in the purchase price adjustment. Carve-outs narrow the seller’s liability but must be negotiated carefully; some carve-outs (like excluding “all indirect losses”) can inadvertently eliminate recoverable losses.
Specific indemnities: Where due diligence has identified a specific known risk, a pending tax audit, an environmental issue, or a potential employment claim, the buyer may negotiate a specific indemnity for that risk, outside the general basket and cap. Specific indemnities are often uncapped, which is why sellers resist them.
5. Holdback and Escrow
A holdback (or escrow) is a portion of the purchase price withheld at closing and held in trust typically by a neutral escrow agent or in a joint trust account for a defined period to fund potential indemnification claims.
How it works: Instead of paying 100% of the purchase price at closing, the buyer pays 85–90%, with the remaining 10–15% held in escrow for 12–18 months. If the buyer makes a valid indemnification claim during that period, the claim is satisfied from the escrow. At the end of the escrow period, any unclaimed amount is released to the seller.
From the seller’s perspective, a holdback delays receipt of part of the proceeds and creates cash flow risk (what if the buyer makes a spurious claim to tie up the escrow?). Sellers should negotiate: (a) a short escrow period; (b) a clear dispute resolution mechanism that prevents the buyer from blocking release without cause; and (c) release of the escrow (or portions of it) on a rolling schedule rather than all at closing + one release.
From the buyer’s perspective, the escrow provides a funded source of recovery for indemnification claims without needing to pursue the seller personally.
Rep and warranty insurance is an alternative to traditional escrows that has become increasingly common in Canadian private M&A. Under R&W insurance, an insurer (rather than the seller) covers losses arising from warranty breaches, and the escrow (or a substantial portion of it) can be eliminated. R&W insurance shifts the indemnification risk from the seller to an insurer, reducing friction at closing. It is most common in deals above $20–30M in enterprise value.
6. Closing Conditions
Closing conditions are the events or circumstances that must exist (or must not exist) before either party is obligated to complete the transaction. If a condition is not satisfied by the closing date, the party benefiting from the condition can typically elect to terminate the SPA.
Material Adverse Change (MAC) clause: One of the most negotiated closing conditions is the MAC clause, which gives the buyer a right to walk away if there has been a material adverse change in the business between signing and closing. The definition of “material adverse change” is everything; broad definitions favor buyers, and narrow definitions favor sellers. Industry-wide events, pandemic-type disruptions, and general economic conditions are commonly carved out from the MAC definition at the seller’s insistence.
7. Non-Competition and Non-Solicitation
Post-closing restrictive covenants prevent the seller from competing with the business just sold or soliciting its employees and customers.
Non-competition: The seller agrees not to carry on a competing business within a defined geographic scope and time period. In Canada, non-competition covenants must be reasonable in scope, geography, and duration to be enforceable under common law. Courts scrutinize them carefully. In Ontario, the Employment Standards Act, 2000, now restricts non-competes for employees, but in the M&A context, non-competes on a selling business owner are generally held to a different (more permissive) standard because the seller received consideration specifically for the covenant.
Typical parameters in Canadian private M&A: 2–5 years, geographic scope tied to where the business actually operates.
Non-solicitation prevents the seller from soliciting customers or employees of the acquired business for a defined period. Courts are more willing to enforce non-solicitation covenants than non-competes, as they are narrower in scope.
From the seller’s perspective, push for the narrowest possible definition of the restricted business, the shortest period, and a geographic scope limited to where you actually operated.
8. ITA Section 116 Non-Resident Seller Considerations
If the seller is a non-resident of Canada, the SPA must address ITA s. 116. Under this provision, the buyer is required to withhold a portion of the purchase price, generally 25%, and remit it to the CRA unless the seller has obtained a clearance certificate from the CRA confirming that the non-resident’s Canadian tax obligations have been satisfied or secured.
Why this matters for buyers: Without a clearance certificate, the buyer becomes personally liable for the withholding. This is not a drafting technicality; it is a hard obligation. If the seller is a non-resident and cannot or will not obtain a clearance certificate before closing, the buyer must escrow 25% of the purchase price, which significantly complicates closing.
Why this matters for sellers: A non-resident seller should engage the CRA well in advance the clearance certificate process can take three to six months and requires filing an undertaking with CRA and providing security for the estimated tax. Starting late creates real deal risk.
The SPA should include a representation from the seller confirming residency status and specific provisions dealing with the clearance certificate and withholding obligations where relevant.
9. Tax Matters Provisions
Beyond the general tax representation, most SPAs contain a dedicated tax matters section covering:
Tax filings for pre-closing periods: Who is responsible for filing tax returns for periods ending on or before closing, and who controls the preparation and filing of those returns? Typically the seller files pre-closing returns (with the buyer having review and comment rights); the buyer files post-closing returns.
Tax refunds: If a pre-closing tax year generates a refund after closing, who is entitled to it? Usually the seller, but this must be expressly stated.
Tax audits: If CRA audits a pre-closing period after the deal has closed, who controls the response? Who pays any reassessment? The tax indemnification provisions and audit control provisions must align.
Straddle period: Where the closing falls mid-year, the SPA must address how the tax attributes of the “straddle period” are allocated between the parties.
Common Mistakes Sellers Make
Not reading the disclosure schedule carefully: The disclosure schedule is your primary defense against warranty liability. Anything you fail to disclose that later turns out to be inaccurate can become an indemnification claim. Review it line by line before signing.
Accepting the first draft’s survival period without pushback: Buyers’ first drafts often propose 36-month survival periods for general reps. This is a negotiating position, not an industry standard. Push back.
Agreeing to uncapped specific indemnities for known risks: If due diligence surfaced a specific issue, a CRA query, an employment dispute, or a lease interpretation, buyers will often request a specific indemnity for that risk, separate from and outside the general cap. These can represent enormous open-ended liability. Negotiate a cap, a sunset period, or an adjustment to the purchase price instead.
Failing to negotiate the MAC definition: A broad MAC clause gives the buyer an exit ramp if the business deteriorates between signing and closing. Narrow the MAC definition to target-specific events (not industry-wide or macro conditions) and add appropriate carve-outs.
Not understanding the earnout mechanism: Many sellers sign SPAs with earnout provisions they do not fully understand, particularly how accounting discretion exercised by the buyer affects the earnout calculation. If there is an earnout, it must have clear, objective metrics and a robust dispute mechanism.
Signing without independent legal advice. The buyer’s lawyer drafted the document. It is written to protect the buyer. Signing it without your own lawyer reviewing it is one of the most expensive decisions a seller can make.
How Kalfa Law Firm Helps
Kalfa Law Firm drafts and negotiates share purchase agreements for sellers and buyers across Canada.
The SPA is where transactions are won or lost. Getting it right, not just signed, is what matters.
Get your SPA reviewed before you sign. Book a call
FAQs:
Shira Kalfa, BA, JD, Partner and Founder
Shira Kalfa is the founding partner of Kalfa Law Firm. Shira’s practice is focused in corporate-commercial and private M&A law including corporate reorganizations, corporate restructuring, mergers and acquisitions, commercial financing, secured lending and transactional law.
© Kalfa Law Firm | August 4, 2026
The above provides information of a general nature only. This does not constitute legal or accounting advice. All transactions or circumstances vary, and specified legal advice is required to meet your particular needs. If you have a legal question you should consult with a lawyer.
