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Amalgamation legally combines two or more corporations into a single continuing corporation. The amalgamated company inherits all the assets, liabilities, and contracts of the originals, and the predecessors cease to exist as separate entities. It's used to simplify a corporate group or merge related companies. The tax and legal side is genuinely complex, so plan it with an accountant and lawyer.
Amalgamation legally combines two or more corporations into a single continuing corporation. The amalgamated company inherits all the assets, liabilities, and contracts of the originals, and the predecessors cease to exist as separate entities. It's used to simplify a corporate group or merge related companies. The tax and legal side is genuinely complex, so plan it with an accountant and lawyer.
An amalgamation (sometimes called a merger) takes two or more existing corporations and fuses them into one continuing corporation. Everything the predecessor corporations held flows into the amalgamated company automatically: all their assets, all their liabilities, their contracts, their employees, their bank accounts, their obligations. There's no need to individually transfer each asset or reassign each contract, which is one of the main attractions: the amalgamated corporation simply is the continuation of the ones that combined.
After the amalgamation takes effect, the predecessor corporations cease to exist as separate legal entities. They're not dissolved and wound up, they're absorbed. The shareholders of the predecessors typically receive shares in the amalgamated corporation in exchange for their old shares. The result is a single company that carries the combined history, assets, and debts of everything that went into it.
That inheritance of liabilities is the double edge worth naming plainly: the amalgamated corporation is on the hook for the debts and obligations of all the predecessors. You don't get to leave the awkward liabilities behind by merging; they come along.
There are two shapes most amalgamations take, and the distinction matters for both process and cost. A vertical amalgamation combines a parent corporation with one or more of its wholly-owned subsidiaries: the parent absorbs a company it already fully owns. A horizontal amalgamation combines two or more corporations that are owned by the same shareholders (sister companies), rather than one owning the other.
These "long-form" and "short-form" distinctions exist because when the corporations are already under common ownership, the law offers a streamlined procedure (a short-form amalgamation) that skips some of the shareholder-approval steps required when independent corporations with different owners merge. A vertical short-form (parent + wholly-owned subsidiary) and a horizontal short-form (wholly-owned sister companies) are the common, cleaner cases.
When you're merging corporations that aren't under common ownership (a genuine merger of two independent businesses), you're in long-form territory, which requires an amalgamation agreement, shareholder approval from each corporation, and more moving parts. That's a materially bigger undertaking than a housekeeping merger of companies you already own.
The most common reason is simplification. Business owners accumulate corporations over the years (a holding company here, an operating company there, an old numbered company that once held a specific asset) and end up paying to maintain, file annual returns for, and prepare tax returns for several entities when they'd rather have one. Amalgamating collapses that clutter into a single corporation with a single set of filings.
Other drivers include combining a profitable company with one carrying tax losses (to use those losses, subject to strict rules), consolidating a group before a sale or financing so a buyer or lender sees one clean entity, and integrating businesses after acquiring another company. Each of these has a real strategic logic, and each has tax consequences that reward planning.
What amalgamation is not is a way to shed liabilities or start fresh. Because the combined corporation inherits everything, it's a consolidation tool, not an escape hatch. If your goal is to wind a company down and end its obligations, dissolution, not amalgamation, is the filing you're looking for.
We'll be straight with you: amalgamation is the most complex filing on this page, and the complexity lives almost entirely in the tax and legal design, not the form-filing. The Income Tax Act treats an amalgamation as a specific kind of event with specific rules: about the tax cost of assets, the treatment of losses, the deemed year-ends of the predecessor corporations, and the shares issued in exchange. Getting the structure right (and even the effective date) can change your tax outcome materially.
There's also a legal-diligence side: confirming clean title to assets, understanding which liabilities are coming along, satisfying any lender or contract consents, and drafting an amalgamation agreement where one is required. For anything beyond a simple short-form merger of companies you already wholly own, an accountant and a corporate lawyer should be involved before you file.
So here's how we fit in honestly. CorpStart can prepare and file the Articles of Amalgamation and the supporting resolutions once the structure has been decided: the mechanical filing. We are not the right people to design the tax structure of a merger, and we'll tell you so. Bring us a plan your advisors have signed off on, and we'll execute the filing efficiently.
For a straightforward short-form amalgamation of corporations you wholly own, tell us which corporations are combining and the details of the continuing corporation. We prepare the Articles of Amalgamation and the required resolutions, confirm the predecessors are in good standing, and file with the Ontario Business Registry or Corporations Canada.
For anything more involved (a long-form merger, corporations with outside shareholders, or a transaction with real tax stakes), we'll coordinate around the plan your accountant and lawyer set, and handle the filing mechanics once the structure is settled. The honest through-line: we make the filing part smooth; the strategy part belongs with your advisors.
For a short-form merger of companies you already own, with your advisors handling the tax plan.
Confirm the structure
Tell us which corporations are combining and the details of the continuing corporation. For anything with tax stakes, have your accountant and lawyer set the plan first.
We prepare and file
CorpStart drafts the Articles of Amalgamation and supporting resolutions, confirms the predecessors are in good standing, and files with the registry.
One continuing corporation
The amalgamated corporation carries the combined assets, liabilities, and history; the predecessors are absorbed. You receive the filed documents for your minute book.
Horizontal vs. vertical amalgamation
| Factor | Vertical | Horizontal |
|---|---|---|
| What combines | Parent + wholly-owned subsidiary | Sister companies (same owners) |
| Common ownership? | Yes, parent owns the subsidiary | Yes, same shareholders own both |
| Procedure | Often short-form (streamlined) | Often short-form (streamlined) |
| Shareholder approval | Simplified when wholly-owned | Simplified when commonly owned |
| Independent companies merging? | That's a long-form amalgamation | That's a long-form amalgamation |
What's the difference between amalgamation and dissolution?
Amalgamation combines corporations into one continuing company that inherits all their assets and liabilities: nothing is left behind. Dissolution formally closes a corporation and ends its existence. If your goal is to simplify a group by merging companies, that's amalgamation; if your goal is to wind a company down and end its obligations, that's dissolution. They're opposite intentions.
Does the amalgamated company inherit the old companies' debts?
Yes, completely. The amalgamated corporation is legally responsible for all the assets, liabilities, contracts, and obligations of every predecessor corporation. That's why amalgamation isn't a way to shed liabilities: you can't leave the awkward debts behind by merging. It's a consolidation tool, not an escape hatch.
What's the difference between a short-form and long-form amalgamation?
A short-form amalgamation is a streamlined procedure available when the corporations are already under common ownership: a parent with a wholly-owned subsidiary (vertical) or wholly-owned sister companies (horizontal). A long-form amalgamation is for merging independent corporations with different shareholders; it requires an amalgamation agreement and shareholder approval from each corporation, and it's a bigger undertaking.
Do I need an accountant or lawyer to amalgamate?
For anything beyond a simple short-form merger of companies you already wholly own, yes. The tax side (asset cost bases, use of losses, deemed year-ends, shares issued in exchange) is genuinely complex and rewards planning. CorpStart files the Articles of Amalgamation and resolutions once the structure is decided, but we don't design the tax plan; that belongs with your advisors.
Can I amalgamate an Ontario corporation with a federal one?
Not directly. Amalgamating corporations generally need to be under the same governing statute. If you want to combine an Ontario and a federal corporation, one of them usually has to be continued into the other's jurisdiction first (see continuance), and then they can amalgamate. This is exactly the kind of multi-step transaction where advice up front saves money, and we'll flag it before you start.
Consolidate cleanly
For a short-form merger of companies you own, we prepare and file the Articles of Amalgamation and resolutions. For the tax side, we work alongside your accountant and lawyer.
Start my corporationCorpStart is a document preparation service, not a law firm. The information on this page is general in nature and does not constitute legal or tax advice. For advice specific to your situation, consult a licensed lawyer or accountant.