Choosing your corporate year-end (you only get one free pick)

Your corporation’s fiscal year-end is whatever date lands on its first T2 — the corporation’s income tax return — and changing it afterwards generally requires the CRA’s permission. Which is why this is a first-year question, not a year-three one. The date turns on three things: the month your business is quiet enough to measure accurately, the month there is cash to pay a tax balance, and how far you want your busy season to sit from the day the tax on it comes due.

Most corporations land on December 31 because nobody chose. It is a defensible date, and for a business with a season it is often the worst day of the year to be counted — one line on the first-90-days setup list that gets settled by default.

The year-end is a measurement date before it is a tax date

Everything on the return is a fact about one day. Closing inventory, work in progress, receivables, the balance in your shareholder-loan account — all measured at the year-end and then never re-opened. The count is fixed by the year-end date, and closing stock raises the profit the return reports rather than reducing it, which is the arithmetic most owners find backwards.

So the date decides how hard your file is to produce, permanently. A year-end in your busiest month means counting stock while it is still moving and valuing half-finished jobs nobody has time to walk through. A year-end in the quiet month means a smaller balance sheet and a count somebody can actually do.

Cash runs on the same date. The corporation’s balance of tax is generally due two months after year-end, three for many CCPCs that claimed the small-business deduction. A year-end two months ahead of your leanest month puts the bill in it.

An off-calendar year-end moves when the tax is due, not how much

Tax on a dollar of profit falls due two or three months after the end of the fiscal year that dollar landed in. So the wait is set by where the dollar sits inside your year. A dollar earned in the first month waits close to fourteen months. A dollar earned in the last month waits two.

That is the whole mechanism. A year-end just before your busy season puts the season’s profit at the front of the fiscal year and stretches the gap; one just after puts it at the back. The rate is untouched either way — federally, 9% on the first C$500,000 of active business income for an eligible CCPC in 2026, with a provincial rate on top.

Two things shrink the benefit. Instalments are the first: once the corporation owes them they fall due through the tax year itself, monthly for most corporations, so profit is paid against as it arrives rather than a year later. A first year generally escapes them, because there is no prior-year tax to calculate from, and they are generally not required where total tax payable for the year is C$3,000 or less. The second is that this happens once — a standing shift in a payment date, not a saving that repeats.

The bonus window falls on one side of December 31 or the other

Salary is deductible to the corporation in the fiscal year it was incurred and taxable to you in the calendar year you were actually paid. Two calendars, and the accrued bonus is where they meet: remuneration accrued in the fiscal year and paid within a set number of days after year-end is generally still deductible in that year, and past the count the deduction moves to the year of payment. The year-end checklist has the mechanics.

What your year-end decides is which side of December 31 that window sits on. With a December 31 year-end the window opens January 1, so a bonus accrued at year-end and paid inside it is necessarily income of your following calendar year — the corporation deducts in one year, you report in the next. With a year-end in the first half of the calendar year the window generally closes before December 31, so deduction and income land in the same personal year. With one in the late summer or autumn it generally reaches past December 31, and the payment date you pick inside it decides which personal year takes the income.

The count is short, and it is not a rule of thumb. By the time anyone is thinking about compensation, the corporate year-end has usually passed.

What does not move with your year-end

• T4 and T5 slips. They report the calendar year and are filed by the last day of February whatever your fiscal year is — an off-calendar year-end means running two calendars permanently.
• Your own T1, and personal instalments on the 15th of March, June, September and December, no matter what the corporation does.
• The shareholder-loan interest benefit, which runs on the calendar year even though the repayment rule runs off the fiscal one — two clocks on the same balance.

GST/HST is the one that follows. An annual filer’s reporting period is the fiscal year, so that return moves with the year-end — generally three months after it. The deadline table has the rest.

A worked example: the count or the deferral

Illustrative, round numbers. An online retailer incorporates March 1, 2026. Two-thirds of the year’s sales land between October and December. The warehouse is fullest in September, when the season’s stock has arrived and nothing has shipped, and emptiest at the end of January.

Take January 31. The first period runs eleven months and takes in the whole first season — call it C$200,000 of active business income. The count happens in the quietest week of the year, on the smallest inventory balance it will hold. The balance of tax is due March 31 or April 30, 2027, by which point the season’s receipts are in the bank, and the T2 follows July 31, 2027.

Take September 30 instead. The first period is seven months and stops the day before the season starts, so it holds a fraction of the same trading — say C$30,000. The season’s C$170,000 falls into the year ending September 30, 2027, and the tax on it is not due until November 30 or December 31, 2027, roughly a year after the sales. That is a real cash deferral. It also requires a full count on the fullest warehouse of the year, with the season’s stock in and none of it sold.

Neither is right. One buys accuracy and a bill timed to the cash; the other buys time and pays for it in measurement. From year two, instalments claw back part of the deferral and none of the measurement problem.

Changing it later is a request, not a filing

The corporation writes to the CRA asking to change its fiscal period and says why. Permission generally turns on a sound business reason, and tax deferral by itself is generally not one. A few changes happen without a request — a wind-up, an acquisition of control — but those are events, not choices.

The letter is not the cost. A change creates a short transition year: an extra T2 with its own balance-due date, its own instalment recalculation, and comparatives that no longer compare. Annual amounts computed for a full year are generally prorated across a short period rather than granted in full, capital cost allowance and the small-business limit among them. A first period can be short too, and cannot run past a maximum length the Act sets — but that one is chosen before any of it has a price.

What Cadence does

We set the year-end at onboarding from three things we ask about rather than assume: the month the business is genuinely quiet, the month the cash is there, and the calendar your personal return already runs on. From that date the filing calendar is built and then tracked, and the instalment schedule calculated from it — both in every package, with the corporate and owner returns the date drives. Where an accrued bonus is part of the plan, the resolution date and the payment date get set together rather than discovered in February; that planning sits in the year-round packages. If your year-end is already in your busiest month, we price the change — the request, the short transition year, the extra return — before anyone writes to the CRA. E-commerce and retail sellers raise this most, because their measurement month and their cash month are rarely the same.