Corporate Tax Compliance Checklist Canada

Corporate tax compliance in Canada involves much more than filing one income tax return each year. An incorporated business may have to manage its T2 return, corporate tax instalments, GST/HST, payroll deductions, information slips, provincial filings, and annual corporate-law requirements. Missing an obligation can lead to interest, follow-up from tax authorities or late corporate tax filing penalties.

This corporate tax compliance checklist Canada guide covers the main obligations that incorporated small businesses should review throughout the year.

Corporate tax compliance checklist: quick answer

A Canadian corporation should generally review the following annual compliance items:

• Keep bookkeeping and bank reconciliations up to date
• Prepare year-end financial statements
• Calculate and pay the corporate income tax balance by the applicable deadline
• File the T2 corporate tax return within six months of year-end
• File separate provincial corporate returns where required
• Determine whether corporate income tax instalments are required
• File and pay GST/HST and QST returns according to the assigned reporting frequency
• Remit payroll source deductions on time
• Prepare T4, T5 and applicable provincial information slips
• File the corporation’s annual corporate return with the appropriate registry
• Update director, shareholder and beneficial ownership information when required
• Maintain supporting accounting and tax records
• Review CRA and provincial notices of assessment and correspondence

The exact requirements vary depending on the corporation’s province, size, payroll, sales, shareholders and business activities.

1. Keep the corporation’s bookkeeping up to date

The first item on any small business tax compliance checklist should be accurate bookkeeping.

Throughout the year, a corporation should properly record:

• sales and other income;
• operating expenses;
• capital asset purchases;
• accounts receivable and payable;
• shareholder transactions;
• payroll and taxable benefits;
• dividends;
• GST/HST and provincial sales taxes.

Bank accounts, credit cards and loan balances should also be reconciled regularly.

Waiting until the corporate year-end to reconstruct twelve months of transactions increases the risk of missing expenses, incorrectly recording shareholder transactions and creating unnecessary year-end accounting costs.

2. Prepare year-end financial statements

The corporate tax return is prepared from the corporation’s accounting records.

At year-end, this generally means preparing or finalizing:

• a balance sheet;
• an income statement;
• a trial balance;
• capital asset schedules;
• shareholder loan balances;
• year-end adjustments.

Financial statement amounts are used in preparing the T2 financial information schedules and determining the adjustments between accounting income and taxable income.

For a deeper explanation, see our guide to financial statements required for T2 filing.

3. Track the corporate tax payment deadline separately from the T2 filing deadline

This is one of the most important items on an annual corporate filing checklist Canada.

A corporation generally has six months after the end of its tax year to file its T2 Corporation Income Tax Return.

The corporate income tax balance, however, is normally due earlier. Corporations generally pay their remaining tax balance two months after year-end, although certain qualifying Canadian-controlled private corporations may have three months after year-end.

For example, a corporation with a December 31 year-end will generally have a June 30 T2 filing deadline, but its income tax payment deadline may fall at the end of February or March. Our guide to corporate tax filing deadlines in Canada explains this distinction in more detail.

The practical rule is simple:

Your corporate tax payment deadline is not necessarily your T2 filing deadline.

This distinction matters because interest can begin accumulating on unpaid corporate tax even though the T2 filing deadline has not yet arrived.

4. File a T2 even when there is no corporate tax payable

Canadian resident corporations generally have to file a T2 return for every tax year even when the company:

• owes no income tax;
• incurred a loss;
• had very little activity;
• was inactive during the year.

The CRA specifically includes inactive corporations among corporations that generally remain subject to annual T2 filing requirements.

For tax years beginning after 2023, corporations are also generally required to file their T2 returns electronically, subject to limited exceptions.

An inactive corporation should therefore not simply stop filing tax returns because it stopped carrying on business.

5. Check whether a separate provincial corporate return is required

The federal T2 generally calculates both federal and applicable provincial or territorial corporate income tax.

However, Quebec and Alberta have separate corporate income tax systems.

A corporation subject to Quebec corporate income tax will normally also need a CO-17 Corporation Income Tax Return filed with Revenu Québec.

Certain Alberta corporations must file a separate AT1 Alberta Corporate Income Tax Return.

The CRA confirms that the T2 serves as the federal and provincial or territorial corporate return except where separate filings apply, including Quebec and Alberta. For a practical overview, see how to file a T2 and provincial corporate tax return in Canada.

Corporations operating in more than one province may also have to allocate taxable income between jurisdictions.

6. Determine whether corporate tax instalments are required

Many established corporations are required to pay income tax throughout the year rather than waiting until year-end.

Corporations generally have to make monthly or, if eligible, quarterly instalments when their tax payable exceeds the applicable threshold. The CRA states that corporate instalments are generally required when total taxes payable exceed $3,000, subject to the detailed instalment rules.

Monthly corporate tax instalments are generally due by the last day of each month during the corporation’s tax year.

Some eligible small Canadian-controlled private corporations can make quarterly instalments, but quarterly eligibility has additional conditions and should not be assumed merely because a corporation qualifies as a small business.

Missing required instalments can result in instalment interest even if the final corporate income tax balance is later paid in full.

7. File GST/HST and QST returns on schedule

GST/HST obligations operate independently from the T2 return.

A registered corporation may have an:

• annual reporting period;
• quarterly reporting period; or
• monthly reporting period.

For monthly and quarterly registrants, the GST/HST filing and payment deadline is generally one month after the end of the reporting period. Annual filers generally follow a different deadline.

Quebec corporations registered for GST and QST must similarly follow their assigned reporting frequency with Revenu Québec.

A return is generally still required even when there were no transactions or no net tax payable for the reporting period.

8. Stay current with payroll remittances

If a corporation has employees, payroll compliance becomes another recurring obligation.

Amounts that may have to be withheld and remitted include:

• income tax;
• Canada Pension Plan contributions;
• Quebec Pension Plan contributions where applicable;
• Employment Insurance premiums;
• Quebec Parental Insurance Plan premiums;
• applicable provincial employer contributions.

The required remittance frequency depends partly on the corporation’s assigned remitter category. Eligible small employers may qualify as quarterly remitters, while regular and accelerated remitters have more frequent deadlines.

Payroll obligations should therefore be monitored separately from corporate income tax deadlines.

9. Prepare T4, T5 and applicable provincial information slips

Calendar year-end creates another important compliance period.

Depending on the corporation’s activities, information returns may include:

• T4 slips for employment income.
• T5 slips for certain dividends, interest and investment income.
• Other information returns required based on payments made during the year.

T4 and T5 information returns are generally due by the last day of February following the applicable calendar year.

Quebec corporations may also have to prepare provincial slips such as RL-1 slips for employment income and RL-3 slips for investment income and dividends. Revenu Québec generally requires these slips by the last day of February following the year covered.

10. File the corporation’s annual corporate return

One of the most common compliance mistakes is confusing the corporate annual return with the T2 corporate income tax return.

They are not the same filing.

The T2 is an income tax return filed with the CRA.

The corporate annual return is a corporate-law filing used to keep the corporation’s legal information current with its federal or provincial corporate registry.

A corporation incorporated federally under the Canada Business Corporations Act generally has to file its annual return within 60 days following its anniversary date.

Provincially incorporated corporations follow the rules of their own provincial or territorial registry.

Ignoring annual corporate filings can eventually jeopardize the corporation’s good standing and potentially lead to administrative dissolution.

11. Update beneficial ownership and corporate information

Corporate transparency requirements have expanded in Canada.

Federal CBCA corporations are required to file information about their individuals with significant control (ISCs) with Corporations Canada. This information is filed with the annual return and generally must also be updated within 15 days following a change to the corporation’s ISC register.

Provincial requirements differ.

Changes involving shareholders, directors, officers, addresses or ownership should therefore be reviewed promptly rather than waiting until the next T2 filing.

12. Properly document shareholder transactions

Transactions between an incorporated business and its shareholders are a frequent source of year-end tax issues.

A corporation should properly track and document:

• shareholder advances to the corporation;
• personal withdrawals;
• expense reimbursements;
• dividends;
• salary and bonuses;
• shareholder loans;
• transfers of property between the corporation and related parties.

A bookkeeping entry does not always provide sufficient legal or tax documentation.

For example, dividends may require proper corporate resolutions and information slips, while shareholder loans may have tax consequences if they remain outstanding under certain circumstances.

13. Maintain supporting corporate tax records

A corporation should maintain enough documentation to support the amounts reported in its tax returns.

Records normally include:

• sales invoices;
• supplier invoices;
• bank statements;
• credit-card statements;
• contracts;
• payroll records;
• capital asset documentation;
• tax returns;
• notices of assessment;
• relevant corporate records.

The CRA’s general rule is that business records should normally be retained for six years from the end of the tax year to which they relate, although special circumstances can require a different retention period.

Digital bookkeeping does not eliminate this obligation. Supporting documentation must still be retained and accessible if the CRA requests it.

14. Review notices of assessment after filing

Corporate tax compliance does not end when the accountant submits the tax return.

Once the T2 has been assessed, the corporation should review its CRA Notice of Assessment to make sure:

• the return was assessed as expected;
• tax instalments were properly credited;
• the balance or refund is correct;
• no CRA adjustments were made;
• no additional information has been requested.

Our guide to what happens after you file a T2 return explains the assessment and follow-up stage.

The same process should be followed for Revenu Québec and other applicable provincial tax authorities.

An unexpected assessment should be investigated promptly rather than simply carried forward into the next year.

Turn your annual corporate filing checklist into a year-round process

The best small business tax compliance checklist is not something that is opened once a year when the accountant asks for the year-end documents.

Corporate compliance happens throughout the year.

• Monthly or quarterly: bookkeeping, reconciliations, payroll, GST/HST, QST and corporate tax instalments.
• Calendar year-end: T4, T5, RL-1, RL-3 and other applicable information slips.
• Corporate fiscal year-end: financial statements, year-end adjustments and taxable income calculations.
• After fiscal year-end: corporate income tax payments followed by T2 and applicable provincial corporate tax returns.
• Around the corporation’s anniversary date: corporate registry and beneficial ownership filings where applicable.

Creating a compliance calendar around these separate obligations can reduce late-filing penalties, interest charges and the year-end rush that occurs when several years of accounting issues are discovered at once.

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