For years, corporations in Canada had the choice: file the T2 corporate income tax return on paper or electronically. Most accounting firms already filed electronically, but some smaller corporations — particularly those with simple returns managed by a sole owner — continued to mail paper returns to the CRA. That option is now gone.
The 2024 federal budget introduced mandatory electronic filing for all Canadian corporations. Any T2 return filed on paper now attracts an automatic $1,000 penalty — regardless of whether the corporation owes any tax, has simple financials, or has always filed on time in the past. For Calgary incorporated businesses still managing this in-house, this rule change is a signal to review whether your current approach to corporate tax compliance is keeping pace with CRA's requirements. If your corporation is still mailing returns, this is an urgent issue to address before your next filing deadline.
The mandatory electronic T2 filing requirement applies broadly. If your business is incorporated — federally under the Canada Business Corporations Act, or provincially in Alberta or any other province — you are required to file electronically. This includes:
There is no "small business exemption" based on revenue. If you are incorporated, you must file electronically. Note that payroll accounts (RP) have their own separate compliance requirements — remittance deadlines and T4 obligations that run parallel to your T2 filing. Our guide to payroll services in Calgary covers those obligations in full.
There are two primary methods for electronic T2 filing:
Accounting firms and tax preparers authorized by the CRA file T2 returns using certified tax software through the EFILE system. The accountant prepares the return, you review and approve it, and it is transmitted directly to the CRA. This is the most reliable approach for corporations with complex financials, multiple shareholders, or prior-year issues to address.
Corporations can file their own T2 returns using CRA's Corporation Internet Filing portal, provided they use CRA-certified software. The corporation must have a Business Number (BN) and be registered with My Business Account or Represent a Client. This path is more suitable for straightforward returns where the owner-manager is comfortable preparing the financial statements and schedules.
Filing electronically doesn't mean filing less. The T2 return must still include all required schedules and attachments. Commonly required schedules for small and medium corporations include:
| Schedule | Purpose |
|---|---|
| Schedule 100 | Balance sheet — financial position at year end |
| Schedule 125 | Income statement — revenue and expenses |
| Schedule 1 | Net income for tax purposes — adjusting book income to taxable income |
| Schedule 4 | Corporate loss continuity |
| Schedule 7 | Aggregate investment income and active business income |
| Schedule 50 | Shareholder information — names, addresses, and share percentages |
| Schedule 8 | Capital cost allowance (CCA) — depreciating assets |
The T2 return is due six months after the corporation's fiscal year end. If your fiscal year ended December 31, 2025, the return is due June 30, 2026. However, the tax balance owing is generally due within two months of fiscal year end — March 2, 2026 in this example — for most Canadian-controlled private corporations (CCPCs) that meet the small business criteria. Larger corporations or those that do not qualify as CCPCs have their balance due within three months.
Interest on unpaid balances begins accruing the day after the payment due date, currently at CRA's prescribed rate. Filing late also triggers late-filing penalties on any unpaid balance.
The mandatory electronic filing requirement is a good reminder that corporate tax compliance has real teeth. A $1,000 penalty for using the wrong filing method is money your corporation didn't need to spend — and if you have multiple years outstanding and file them all on paper, those penalties stack. For Calgary incorporated businesses managing compliance themselves, this is also a good time to review what professional corporate tax support actually costs versus the penalties of getting it wrong. See our breakdown of accountant costs for Calgary businesses for an honest comparison.
Swift Accounting's corporate tax team handles T2 preparation, electronic filing, and CRA correspondence for incorporated businesses of all sizes across Calgary and Alberta. If your corporation is behind on prior years or you're unsure whether your returns include all required schedules, book a free consultation and we'll review your compliance status.
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