1. Why You Need a Corporate Tax Filing Checklist
A corporate tax return is only as accurate as the documents behind it. CRA does not accept estimates, approximations or reconstructed figures on a T2 return — every number on every schedule must be supported by an original document that can be produced on audit. The most common reason for T2 reassessment is not aggressive tax planning or intentional error — it is missing documentation. A deduction claimed without a supporting invoice is a deduction denied. A CCA class assignment without a purchase receipt is a CCA class reversed.
This checklist organises every document you need into 10 categories, each matching a section of the T2 return. Gather these documents before your CPA begins preparing your return — not during. A complete document package means fewer CPA follow-up questions, faster filing, lower fees and a return that survives CRA review without adjustment.
2. Key Filing Deadlines for 2026
Missing a corporate tax filing deadline triggers automatic penalties and daily compounding interest. The deadlines depend on your corporation's fiscal year-end.
| Fiscal Year-End | T2 Filing Deadline | Tax Balance Due Date (CCPC) | Tax Balance Due Date (Non-CCPC) |
|---|
| December 31, 2025 | June 30, 2026 | March 31, 2026 | February 28, 2026 |
| March 31, 2026 | September 30, 2026 | June 30, 2026 | May 31, 2026 |
| June 30, 2026 | December 31, 2026 | September 30, 2026 | August 31, 2026 |
| September 30, 2026 | March 31, 2027 | December 31, 2026 | November 30, 2026 |
Payment Deadline Is Earlier Than Filing Deadline: The balance of corporate tax owing is due two months after year-end (three months for qualifying small CCPCs with prior-year taxable income under $500,000). The T2 return itself is due six months after year-end. This means you must estimate and pay your tax balance before your CPA has finished the return. Late payment triggers daily compounding interest at CRA's prescribed rate — currently 8% annually. Late filing triggers a separate penalty of 5% of the balance plus 1% per month, up to a maximum of 17% for a first offence and 10% plus 2% per month for a second offence within three years.
3. The Complete Corporate Tax Filing Document Checklist
The following checklist covers every document category required for a complete T2 corporate tax return filing. Each item is tagged as Required (CRA mandatory), Recommended (best practice for accuracy and audit protection) or Conditional (required only if applicable to your corporation).
1
Corporate Identity Documents
5 items
Articles of IncorporationRequiredFederal or provincial Articles confirming legal name, share structure, incorporation date and jurisdiction. Required for first-year filings and when share structure changes.
Business Number (BN) ConfirmationRequiredCRA Business Number confirmation letter showing your 9-digit BN and all program accounts (RC, RT, RP, RM).
Corporate Minute BookRequiredCurrent year directors resolution, annual resolution of shareholders, any share transfers, salary/dividend declarations. CRA may request on audit.
Shareholder AgreementConditionalRequired if multiple shareholders. Confirms ownership percentages, dividend entitlements and associated corporation relationships for Schedule 9.
Provincial Registrations and Extra-Provincial LicencesConditionalRequired if operating in multiple provinces. Confirms permanent establishment in each province for Schedule 5 allocation of taxable income.
2
Financial Statements and Records
7 items
Year-End Trial BalanceRequiredComplete trial balance from your accounting system as at fiscal year-end. This is the primary source for Schedule 100 (Balance Sheet) and Schedule 125 (Income Statement).
Income Statement (Profit and Loss)RequiredFull-year income statement with revenue and expense detail by account. Maps directly to GIFI codes on Schedule 125.
Balance SheetRequiredYear-end balance sheet showing all assets, liabilities and shareholder equity. Maps to Schedule 100 GIFI codes. Retained earnings must reconcile to prior year plus current-year net income.
Bank Statements — All 12 MonthsRequiredComplete set of monthly bank statements for every business account. Must reconcile to the bank account balance on the balance sheet. CRA's first request on audit is always bank statements.
Bank Reconciliation — Year-EndRecommendedReconciliation of the accounting system bank balance to the bank statement balance as at fiscal year-end. Identifies outstanding cheques and deposits in transit.
Investment Statements (T3, T5 Slips)ConditionalRequired if the corporation holds investment accounts. T3 and T5 slips report interest, dividends and capital gains. Critical for AAII calculation and passive income reporting on Schedule 7.
Loan Agreements and Promissory NotesConditionalRequired if the corporation has outstanding loans — including shareholder loans. Documents interest rates, repayment terms and loan balances for balance sheet reporting and interest deductibility.
3
Income and Revenue Records
5 items
Sales Invoices — Complete SetRequiredAll invoices issued during the fiscal year. Total must reconcile to revenue on the income statement. CRA verifies revenue completeness by cross-referencing bank deposits to invoice totals.
Revenue Summary by Client or ProjectRecommendedSummary report from your accounting system showing revenue by customer or project. Speeds CPA review and helps identify any invoicing gaps or timing issues.
Contract and Engagement LettersConditionalRequired for revenue recognition timing — particularly for long-term contracts, milestone-based projects and deferred revenue. CRA reviews these when questioning whether revenue was reported in the correct fiscal year.
Property Disposition RecordsConditionalRequired if you sold capital property during the year — vehicles, equipment, real estate. Purchase receipt, sale agreement and proceeds documentation needed for capital gains/losses calculation on Schedule 6.
Foreign Income RecordsConditionalRequired if the corporation earned income from foreign sources. Includes foreign tax paid documentation for foreign tax credit claims on Schedule 21.
4
Expense Documentation
8 items
Purchase Invoices and Receipts — Complete SetRequiredEvery supplier invoice and receipt for every expense claimed on the T2. Must show vendor name, date, description, amount and HST charged. Credit card statements alone are not sufficient.
Rent or Lease AgreementsRequiredCommercial lease agreement confirming monthly rent, lease term, landlord name and HST charged. Required for both the rent deduction and the ITC claim.
Vehicle Expenses and Mileage LogbookRequiredFuel receipts, insurance, maintenance invoices and a mileage logbook showing business vs. personal kilometres. Without a logbook, CRA typically allows only 50% business use on audit.
Meals and Entertainment ReceiptsRequiredReceipts must show the business purpose, who attended and the business relationship. Only 50% of meals and entertainment expenses are deductible (and only 50% of the HST is claimable as an ITC).
Professional Fees InvoicesRequiredInvoices from your CPA, lawyer, consultant and other professional service providers. Must include the professional's GST/HST number for ITC claims on invoices over $150.
Home Office ExpensesConditionalIf the corporation pays the owner for home office use: mortgage interest or rent receipt, property tax bill, utility bills, home insurance and total square footage with business-use square footage calculation.
Travel Expense RecordsConditionalAirfare, hotel, ground transportation and per diem records with business purpose documentation. International travel expenses must include the business purpose and foreign exchange rates used.
Insurance Policies and Premium StatementsRecommendedBusiness insurance policy details and annual premium statements. Required to distinguish deductible commercial insurance from non-deductible life and health insurance premiums.
5
Capital Cost Allowance (CCA) Records
5 items
Capital Asset Purchase InvoicesRequiredPurchase invoice for every capital asset acquired during the year — equipment, vehicles, computers, furniture, leasehold improvements. Must show date, description, amount and HST. Required for Schedule 8 CCA calculations.
Asset Disposal RecordsConditionalSale agreement or scrap documentation for any capital asset sold, scrapped or traded-in during the year. Required for recapture, terminal loss or capital gain calculations on Schedule 8.
Vehicle Purchase AgreementConditionalPurchase or lease agreement for any vehicle acquired. Required to determine Class 10 vs. Class 10.1 classification (based on the $37,000 cost cap in 2026) and to calculate the lease deduction limit.
Leasehold Improvement DocumentationConditionalContractor invoices for leasehold improvements with description of work. Required for Class 13 CCA calculation — amortised over the remaining lease term plus one renewal period (maximum 40 years).
Prior Year Schedule 8 (CCA Schedule)RequiredLast year's Schedule 8 showing opening UCC balances by CCA class. Essential for calculating current year CCA — without it, opening balances must be reconstructed from inception.
6
Payroll and Employee Records
5 items
T4 Summary and T4 SlipsRequiredYear-end T4 Summary and individual T4 slips for all employees — including the owner-manager. Total salary and wages must reconcile to the payroll expense on the income statement.
Payroll Remittance RecordsRequiredCRA payroll remittance confirmations for every pay period — showing CPP, EI and income tax deducted and remitted. Must reconcile to T4 Summary totals.
T5018 Subcontractor Payment StatementsConditionalRequired for construction industry businesses that paid subcontractors $500 or more during the fiscal year. T5018 statements must be filed within six months of year-end.
Contractor InvoicesRecommendedInvoices from independent contractors. Must include the contractor's name, business address and GST/HST number. Required to distinguish contractors from employees if CRA questions the classification.
Employee Benefits and Group Insurance RecordsConditionalAnnual statements from group benefit and insurance providers. Required to report taxable benefits on T4 slips and to determine deductibility of premium payments.
7
Shareholder and Director Records
5 items
Shareholder Loan Account ReconciliationRequiredRunning balance of amounts owed to or by each shareholder throughout the year. CRA actively audits shareholder loan balances under Section 15(2). Loans outstanding over two year-ends without repayment are included in the shareholder's personal income.
Dividend DeclarationsConditionalDirectors resolution declaring dividends paid during the year — specifying eligible vs. non-eligible designation, amount per share and payment date. Required for T5 slip preparation and GRIP/LRIP tracking.
T5 Summary and T5 SlipsConditionalRequired if dividends were paid to shareholders. T5 slips must be filed by the last day of February following the calendar year in which the dividends were paid.
Schedule 50 — Shareholder InformationRequiredIdentifies all shareholders who owned 10% or more of any class of shares at any point during the year. Names, SINs, percentage ownership, number and class of shares held.
Management Fee AgreementsConditionalRequired if the corporation pays management fees to a related holding company or to a shareholder personally. Must document the services provided, fair market value justification and payment terms.
GST/HST Returns Filed During the YearRequiredCopies of all GST/HST returns filed during the fiscal year with CRA confirmation of receipt. HST collected and ITCs claimed must reconcile to the income statement and balance sheet.
HST Account Balance ConfirmationRecommendedCRA My Business Account statement showing the HST balance as at year-end. Reconcile to the HST payable or receivable on the balance sheet.
ITC Supporting DocumentationRequiredSupplier invoices showing their GST/HST registration number for every ITC claimed on invoices of $150 or more. Without the supplier's registration number, the ITC will be denied on audit.
Quick Method Election (Form GST74)ConditionalRequired if the corporation elected the Quick Method of accounting for GST/HST. Confirms the election date and the applicable remittance rate for the province of supply.
9
Special Credits and Incentives
4 items
SR&ED Project DocumentationConditionalTechnical project descriptions, timesheets, lab notebooks, prototype records and material costs for each SR&ED-eligible project. Must demonstrate systematic investigation and technological uncertainty. Filed with T2 using Form T661.
Ontario Interactive Digital Media Tax CreditConditionalEligibility certificate from Ontario Creates and supporting expenditure documentation. Applicable to qualifying digital media products developed in Ontario.
Apprenticeship Job Creation Tax CreditConditionalEligible salary and wages paid to qualifying apprentices registered in a Red Seal trade. Provides a 10% federal credit (up to $2,000 per apprentice per year).
Charitable Donation ReceiptsConditionalOfficial donation receipts from registered Canadian charities. Deductible up to 75% of net income on the corporate T2 return. Receipts must show the charity's CRA registration number.
10
Prior Year Information
4 items
Prior Year T2 Return and Notice of AssessmentRequiredLast year's complete T2 return and CRA Notice of Assessment. Required for opening balance verification, loss carry-forward schedules and GRIP/LRIP pool tracking.
Prior Year Schedule 8 (CCA)RequiredClosing UCC balances from last year's Schedule 8 become this year's opening UCC balances. Without this schedule, CCA calculations cannot proceed accurately.
Loss Carry-Forward Schedule (Schedule 4)ConditionalRequired if the corporation has non-capital losses, net capital losses or restricted farm losses from prior years available for carry-forward. Losses can be carried forward 20 years (non-capital) or indefinitely (net capital).
RDTOH, GRIP, CDA and Capital Dividend Account BalancesConditionalRunning balances of the Refundable Dividend Tax on Hand, General Rate Income Pool, Low Rate Income Pool and Capital Dividend Account. Required for correct dividend designation and refund calculations.
4. Key T2 Schedules Required for Most Canadian Corporations
The T2 return consists of the main return form plus a series of schedules. The exact schedules required depend on your corporation's activities, but the following are required or commonly applicable for most Canadian CCPCs.
| Schedule | Name | Purpose |
|---|
| Schedule 1 | Net Income (Loss) for Income Tax Purposes | Reconciles accounting net income to taxable income — adds back non-deductible expenses and removes non-taxable income |
| Schedule 4 | Corporation Loss Continuity and Application | Tracks non-capital losses, net capital losses and restricted farm losses available for carry-forward or carry-back |
| Schedule 5 | Tax Calculation Supplementary — Corporations | Allocates taxable income to provinces where the corporation has a permanent establishment |
| Schedule 7 | Aggregate Investment Income and Active Business Income | Separates active business income from passive investment income for SBD and refundable tax calculations |
| Schedule 8 | Capital Cost Allowance (CCA) | Calculates CCA deductions by asset class — opening UCC, additions, dispositions, CCA claimed, closing UCC |
| Schedule 9 | Related and Associated Corporations | Identifies associated corporations for purposes of sharing the $500,000 SBD limit |
| Schedule 50 | Shareholder Information | Reports shareholders holding 10% or more of any class of shares during the year |
| Schedule 100 | Balance Sheet Information | Reports assets, liabilities and equity using GIFI codes — must match year-end balance sheet |
| Schedule 125 | Income Statement Information | Reports revenue and expenses using GIFI codes — must match year-end income statement |
| Schedule 141 | Notes Checklist | Confirms filing requirements — type of corporation, accounting method, associated status and financial statement type |
5. CRA Record Retention Requirements
CRA requires all business records and supporting documents to be retained for a minimum of six years from the end of the tax year to which they relate. This includes every document on this checklist — plus the working papers used to prepare the T2 return. Records must be kept in an orderly fashion at your place of business or at a location approved by CRA.
Record Retention Summary
General business records: 6 years from the end of the tax year
Corporate minute book: Permanent — retain for the life of the corporation
Capital property records: 6 years after the year of disposition (not acquisition)
SR&ED project documentation: 6 years from the filing date of the claim
Electronic records: CRA accepts electronic records provided they are complete, legible and accessible on demand. Scanned receipts are acceptable if the original information is preserved.
Destroying Records Early: Destroying records before the six-year period expires is a federal offence under Section 230 of the Income Tax Act. If CRA requests records that have been destroyed, the corporation loses the right to claim the related deductions and credits — and may face gross negligence penalties. Do not destroy any records until you have confirmed that the six-year retention period has expired and that no CRA audit or objection is pending.
6. Most Common Document Mistakes on Corporate Tax Returns
No Prior Year T2 Return Provided to New CPA
Switching CPAs without providing the prior year T2 and Notice of Assessment. The new CPA cannot verify opening balances, UCC schedules, loss carry-forwards or GRIP pools without the prior return.
Fix: Always provide your new CPA with the complete prior year T2 return, NOA and Schedule 8 before they begin.
Missing Mileage Logbook for Vehicle Claims
Claiming vehicle CCA and operating expenses without a documented mileage logbook. CRA's default position on audit is to reduce business use to 50% or less without logbook support.
Fix: Maintain a 12-month logbook. Use a mileage tracking app. Update annually for driving pattern changes.
Bank Statements Do Not Reconcile to Books
Year-end bank balance on the statement does not match the bank account on the balance sheet. This discrepancy is the first thing CRA checks and immediately triggers additional questions.
Fix: Complete a bank reconciliation at year-end identifying all outstanding cheques and deposits in transit.
Shareholder Loan Balance Not Tracked
No running record of shareholder loan advances and repayments. CRA audits shareholder loans under Section 15(2) — loans outstanding over two consecutive year-ends are included in the shareholder's personal income.
Fix: Maintain a running shareholder loan ledger in your accounting system. Reconcile monthly.
Claiming 100% of Meals and Entertainment
Deducting the full amount of meals and entertainment expenses instead of the 50% limit. One of CRA's most common T2 audit adjustments.
Fix: Configure your accounting software to automatically restrict meals/entertainment to 50% on the T2.
No Dividend Resolution in Minute Book
Paying dividends to shareholders without a directors resolution specifying the amount, class and eligible vs. non-eligible designation. CRA can reclassify the payment as salary (subject to payroll source deductions) or as a shareholder benefit.
Fix: Pass a directors resolution before every dividend payment. Specify eligible or non-eligible designation.
