When Does a Canadian Corporation Have to Pay Tax Instalments?
How corporate income-tax instalments work in Canada, why a profitable company can owe interest even when its T2 is filed on time, and how to build a practical payment forecast.
Quick answer
What Calgary business owners should know
- Corporations generally pay income tax by monthly instalments when the applicable tax payable exceeds the CRA threshold; some eligible Canadian-controlled private corporations can pay quarterly.
- The instalment schedule is separate from the T2 filing deadline and the balance-due date.
- CRA instalment reminders are useful, but management should forecast from current results because the reminder may be based on prior-year information.
- Late or insufficient instalments can create interest and, in some cases, an additional instalment penalty.
Three dates that owners often mix up
A corporation can have an instalment schedule during the year, a balance-due date after its tax year-end, and a T2 filing deadline six months after year-end. These are different obligations. Filing the return on time does not erase interest caused by instalments that were late or too small, and paying instalments does not replace filing the return.
The CRA's general instalment threshold is based on tax payable, not gross revenue. The current year and prior years can affect whether instalments are required. Eligible Canadian-controlled private corporations may qualify for quarterly rather than monthly payments when they meet the CRA's conditions, including compliance and taxable-income criteria.
How to choose a calculation method
CRA guidance describes current-year, previous-year, and combined first-and-second-preceding-year methods. A corporation can use the method that produces the lowest required instalments, but the current-year method carries forecast risk: if actual tax is higher than expected, the shortfall can attract interest. The safer choice depends on the reliability of current financial information and expected changes in profit, taxable income, credits, and provincial tax.
A rolling forecast should begin with year-to-date bookkeeping, normalize unusual items, consider planned transactions, and estimate both federal and provincial liabilities. Compare forecast instalments with amounts already paid and with the CRA account. Revisit the estimate when results, ownership, financing, or major asset transactions change.
Practical checklist
- Record each required date in the finance calendar and assign an owner.
- Reconcile instalment payments to the CRA account and general ledger.
- Update the forecast at least quarterly when profit is changing materially.
- Keep working papers that show the method and information used.
A practical cash-flow approach
Treat corporate tax as a planned use of cash, not a surprise that appears when the T2 is prepared. A separate tax reserve can help, but the reserve percentage should be based on the corporation's facts rather than a generic rule of thumb. Associated corporations, investment income, loss carryovers, credits, and the small-business deduction can all change the result.
When cash is tight, do not silently skip a payment. Update the forecast, identify the likely interest cost, and compare financing or payment options. The CRA controls payment arrangements and collection decisions; an accountant can help quantify the liability and prepare accurate information for the discussion.
Official sources
This guide was prepared from the official sources below. Open them to verify the current rule and review exceptions relevant to your situation.
