Multiple Corporation Filing Cost Calculator
Several quiet corporations, each with its own years. The number of returns owed and the total before tax.
Written and reviewed by Sharad Gondaliya, CPA (Ontario), CPA Ontario Membership 61040184.
Last reviewed: November 3, 2026
Enter both counts and answer the question.
Gondaliya CPA Professional Corporation is a registered EFILE electronic filer. Returns are prepared and transmitted in Canada. Credentials are never shared and never used offshore.
Each Corporation Is Its Own Taxpayer
Holding several quiet corporations does not consolidate them. Each is its own taxpayer with its own Business Number, its own fiscal year-end and its own return for every tax year it has existed, and the fee is $300.00 plus HST per tax year on each of those returns.
So the arithmetic is corporations multiplied by years, which is the figure people are usually surprised by when they own three or four dormant companies rather than one.
Owning several does add two questions a single corporation never faces. The Schedule 9 related corporations checker covers reporting the relationship, which a dormant corporation owes and which leaves its year nil, and the Schedule 23 association agreement checker covers the business limit the group shares, which a nil year has nothing to claim against.
What the Multiplication Looks Like
| Corporations | Quiet years each | Returns | Before tax |
|---|---|---|---|
| 1 | 2 | 2 | $600.00 |
| 2 | 2 | 4 | $1,200.00 |
| 3 | 3 | 9 | $2,700.00 |
| 5 | 1 | 5 | $1,500.00 |
| 5 | 5 | 25 | $7,500.00 |
There is no reduced rate for several corporations or several years in one sitting: every return is prepared, reviewed and transmitted on its own. The unfiled years cost calculator prices one corporation across its years, and the dissolve or keep filing cost calculator sets years of filing against winding one up.
The Deadlines Multiply as Well
Where the corporations share a fiscal year-end, every return falls due on the same date, six months after it. Where they do not, each has its own deadline and there are as many dates to hold as there are corporations.
The corporate deadline calendar generator dates one corporation’s year end to end, and running it once per corporation is the practical way to hold several at once.
Frequently Asked Questions
Is there a discount for filing several corporations?
No. $300.00 plus HST per tax year is charged per tax year per corporation, because each return is prepared, reviewed by a CPA and transmitted separately. Five corporations with one quiet year each is five returns.
Can several corporations be filed on one form?
Each corporation is filed as its own return against its own Business Number. The calculator totals them so the figure is known before any of them starts.
Do they all share a deadline?
Only where they share a fiscal year-end. Otherwise each return is due six months after that corporation’s own year-end.
Nil T2 Filing, $300.00 plus HST per tax year
Type your corporation name, pick your unfiled years, pay, and sign Form T183CORP on a secure screen. Your CRA confirmation is emailed within 3 business days.
Start Nil T2 Filing NOW