Amalgamation vs wind-up: the tax differences

Owners end up with extra corporations for many reasons: an acquisition, a reorganized practice, or a structure that has outlived its purpose. Each extra corporation means another return every year for no benefit. The two standard ways to reduce the count, an amalgamation and a wind-up, are not interchangeable.

Amalgamation: two become one

An amalgamation merges two or more taxable Canadian corporations into one new corporation. Section 87 treatment requires, among other conditions, that all property of the predecessors (other than amounts receivable from, or shares of, another predecessor) and all liabilities pass to the new corporation, and that the shareholders of the predecessors receive its shares.

The predecessors do not survive. In a Canadian amalgamation, that is the trade-off: the tax attributes carry over, but the predecessor corporations themselves are gone.

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, not a tax rate. A wind-up works only where one corporation owns the other, so it suits collapsing a redundant subsidiary or unwinding part of a holding company structure. Amalgamation suits sibling corporations owned by the same people.

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 amalgamation CRA filings that catch people out are set out in the filing differences section above.

The bottom line

Both routes combine corporations without an immediate tax cost, but they produce different entities, year-ends and filing obligations, and they interact differently with each corporation’s tax attributes. The right one depends on your balance sheets and ownership chain, so 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, so please speak with a CPA before acting on anything here.