Amalgamation vs wind-up: the tax differences

Owners end up with more corporations than they need for all sorts of reasons: a company bought a competitor, a professional practice was reorganised, or a structure that made sense a decade ago has outlived its purpose. Two extra corporate returns a year is an ongoing cost with no benefit. The two standard ways to reduce the count are an amalgamation and a wind-up, and they are not interchangeable.

Amalgamation: two become one

An amalgamation merges two or more taxable Canadian corporations into a single new corporation. For the merger to get the tax treatment in section 87, the CRA's guidance sets out conditions including that all of the property of the predecessors (other than amounts receivable from, or shares of, another predecessor) becomes property of the new corporation, that all of the liabilities carry over the same way, and that the shareholders of the predecessors receive shares of the new corporation.

The important practical point is that the predecessors do not survive. Their tax attributes generally flow into the new corporation, but a new legal entity exists on the other side.

Wind-up: a subsidiary folds into its parent

A wind-up under section 88 is different in shape. A subsidiary distributes its property to its parent and is dissolved; the parent carries on. There is no new entity. The T2 return asks about this directly — per the CRA's T2 guide, line 072 asks whether there has been a wind-up of a subsidiary under section 88 during the tax year.

The filing differences that catch people out

The compliance consequences are where the two routes diverge most visibly:

• Predecessor returns. On an amalgamation, each predecessor must file a return for the period ending immediately before the effective date of amalgamation, and answers “yes” at line 076. The CRA states it cannot accept returns filed for a period ending just before a date that is not the effective date, so the corporate paperwork and the tax filings have to agree.
• The new corporation's first year. The tax year of the new corporation cannot be longer than 53 weeks from the date of amalgamation. Line 071 flags the first filing after an amalgamation.
• Schedule 24. Both a first filing after amalgamation and a wind-up of a subsidiary require Schedule 24 to be filed, and the CRA warns that omitting it may delay processing.
• Effective date. The effective date of an amalgamation is governed by corporate law, generally the date on the certificate of amalgamation. You do not get to pick it after the fact.

How to think about choosing

The choice usually turns on the shape of the group rather than a tax rate. A wind-up only works where one corporation owns the other — it is the natural route for collapsing a redundant subsidiary or unwinding part of a holding company structure. An amalgamation is the route for sibling corporations owned by the same people, where neither is a subsidiary of the other.

Beyond that, the analysis is about attributes. Loss carryforwards, capital dividend account balances, refundable tax balances, cost bases, capital cost allowance pools and reserve positions all follow rules that depend on which route is used and on the timing of the year-ends created. Two corporations with clean balance sheets and no losses are a straightforward decision. Add accumulated losses, differing fiscal year-ends, or debt between the companies, and the route changes the outcome by real amounts.

The costs that are easy to forget

Both routes carry non-tax work: corporate filings with the incorporating jurisdiction, updated minute books, notifying the CRA, moving payroll and GST/HST accounts, re-papering bank facilities and contracts that name a specific entity, and dealing with a short tax year and its year-end implications. Simplifying a group is worth doing, but the year you do it is the year with more compliance, not less.

The bottom line

Amalgamation and wind-up both let corporations be combined without an immediate tax cost, but they produce different entities, different year-ends and different filing obligations, and they interact with each corporation's accumulated tax attributes. Which one is right is a question about your specific balance sheets and ownership chain. Do not pick a route from a summary like this one — take the actual numbers to a CPA and a corporate lawyer before the corporate steps are filed.

This article is general information for Canadian business owners and is current as of July 2026. It is not tax, legal or accounting advice, and it does not create a client relationship. Tax rules change and your situation is unique — please speak with a CPA before acting on anything here.