Introduction

Many corporations are formed with a December 31 fiscal year end by default — either because it was the easiest choice at incorporation or because the accountant used it as a standard setting. For many businesses in their early years, the year end is largely irrelevant.

As a corporation grows — and as the interaction between corporate income and personal compensation becomes more significant — the fiscal year end becomes a planning tool. Choosing the right year end, or changing it at the right time, can produce meaningful tax deferral and simplify the compensation decision process.

The Deferral Opportunity in a Non-December Year End

The key mechanism through which a corporate year end creates deferral is the 180-day bonus accrual rule.

Under subsection 78(4) of the Income Tax Act, a corporation can accrue and deduct a salary, bonus, or wages owing to a connected person (a shareholder-employee) at fiscal year end, provided the amount is paid within 180 days of that year end. The deduction is claimed in the fiscal year in which the amount is accrued; the employee includes it in income only in the calendar year in which it is actually paid.

The deferral mechanics:

A corporation with a January 31 fiscal year end accrues a $100,000 bonus at January 31, 2026. The bonus is deducted from the corporation's income for the fiscal year ending January 31, 2026. The bonus must be paid by July 31, 2026 (180 days later). The shareholder-employee includes it in personal income in 2026 — the calendar year in which it is received.

For a corporation with a December 31 year end, a bonus accrued at year end and paid in January is included in the employee's income in the following calendar year — a one-month deferral at most.

For a corporation with a January 31 year end, a bonus accrued at January 31, 2026 and paid in July 2026 is included in the employee's income in calendar year 2026 — the same year, but the cash didn't have to arrive until July. The deferral is on the cash outflow, not the tax recognition date.

The more meaningful deferral occurs when the bonus accrual creates a deduction in one fiscal year while the employee's personal income recognition falls in the following calendar year. This is achievable with a fiscal year end in the early months of the calendar year (January, February, March) — where the fiscal year ending in 2026 can have a bonus accrual that is paid in the same calendar year 2026, while the corporate deduction falls in the fiscal year that spans mostly 2025.

Year End and the SBD Income Planning Window

The fiscal year end also determines the planning window for the year-end compensation decision — the decision about how much salary vs. dividend to pay, whether to declare a bonus, and whether to accelerate or defer income.

For a corporation with a December 31 year end, the planning window for the fiscal year closes on December 31 — the same date. Any compensation adjustments must be made before then.

For a corporation with a June 30 year end, the financial results for the fiscal year are known by June 30, and the compensation decision for that fiscal year can be made — or refined — before the 180-day window closes in December. This gives more time and more information for the decision.

Changing a Fiscal Year End

A corporation can change its fiscal year end by filing an application with the CRA. The change results in a short taxation year — a transitional period from the old year end to the new one. For the short year, pro-rated calculations may apply to certain deductions (the small business deduction limit, for example, is prorated for a short year).

The CRA generally approves fiscal year end changes for valid business reasons. Changing to an arbitrary non-December year end purely for tax deferral, with no corresponding business rationale, may attract more scrutiny — though the tax deferral benefit itself is explicitly contemplated by the Income Tax Act.

When to Speak With a CPA

For a growing corporation where the owner's compensation is a significant component of overall tax planning, reviewing the fiscal year end — and whether a change would produce material tax deferral — is a worthwhile exercise. The analysis is straightforward; the benefit depends on the corporation's income level and the owner's personal tax position.

Rotaru CPA works with incorporated businesses on fiscal year end planning and compensation structuring. Book a consultation to review whether your year end is working for you.