Deferring income and accelerating expenses: what the timing is worth

Shifting income into next year and pulling deductions into this one is standard year-end advice. It is also frequently oversold, because the benefit is a timing benefit and the size of it can be calculated in about a minute. Once you have run that number you can tell whether the exercise is worth the effort, and whether it is quietly working against you.

What a deferral is actually worth

Deferring tax is an interest-free loan from the government for one year. The value of the loan is the tax deferred multiplied by what the money earns or saves you in the meantime.

Move $40,000 of income from this fiscal year to next. At a combined rate of 25%, that defers $10,000 of tax for twelve months. If the business is carrying an operating line at 8%, the deferral is worth about $800 in interest you do not pay. If the cash would otherwise sit in a chequing account earning nothing, it is worth close to nothing.

That is the whole time-value argument. A dollar today beats a dollar next year by the rate you can earn on it or avoid paying on it, and no more. An $800 saving is worth having when it costs you nothing else. It is not worth restructuring a customer relationship over.

Rate differences are the bigger lever

The deferral itself is small. The rate at which the income eventually gets taxed can be large, and this is where timing either makes real money or quietly costs it.

A corporation approaching the small business limit. Active business income up to the limit is taxed at the low combined CCPC rate in Ontario. Above it, the general rate applies, and the gap between the two is more than fifteen percentage points. Pushing income out of a year where it would sit above the limit into a year where it falls below is worth far more than any interest saving. Pushing it the wrong way costs the same amount.

An individual crossing a bracket. For an unincorporated business, or an owner taking the income personally, the marginal rate steps up at each bracket. Income moved out of a year at the top combined Ontario rate into a year at a middle rate is a permanent saving rather than a timing one.

A year of losses. If next year looks poor, a deduction is worth more claimed in this profitable year. If next year looks strong, deductions are worth more if you can hold them.

The method is the same in every case. Estimate taxable income for this year and next, look at the rate the next dollar would face in each, and move dollars toward the lower rate. Everything else is detail.

What actually defers income in Canada

This is where a lot of advice goes wrong. Canadian businesses generally report on an accrual basis, so income is recognised when it is earned, not when it is invoiced and not when the customer pays. Holding back an invoice for work you finished in November does not defer the income. It defers the cash, creates a receivable, and CRA includes the revenue in the year the work was done.

What does move income:

• When the work is performed or the goods are delivered. Genuinely scheduling a project start for January rather than late December moves the revenue. The decision has to be made with the customer in advance and reflected in the contract. Deciding in hindsight is not a decision.
• Reserves on amounts not yet due. Where a sale is structured so part of the proceeds are not payable until a later year, the Act permits a reserve in some circumstances, spread over a limited number of years.
• The fiscal year end itself. A corporation chooses its year end, and for a seasonal business the placement of that date decides which year a busy period lands in, permanently. Changing it later requires CRA approval and a real reason.
• The mix and timing of owner compensation. Salary, bonus and dividends move income between the corporation and the shareholder and between calendar years. For an owner-managed business this is usually the largest timing decision of the year, and we work through it in how to pay yourself: salary or dividends.

What actually accelerates a deduction

• Amounts owed for goods and services already received. An accrual for work performed before year end is deductible in that year whether or not the supplier has been paid. If a subcontractor worked in December and invoices in January, the expense is still December's, provided your bookkeeper has the accrual.
• Bonuses, declared before year end and paid within 179 days of the year end.
• Repairs completed before year end. A repair that restores an asset to working order is a current expense. The work has to be done, not just ordered.
• Bad debts you have genuinely given up on, and obsolete or damaged inventory written down to what it is actually worth. Document the reasoning at the time.
• Corporate charitable donations made before year end, subject to the income limits.
• Capital assets that are available for use before year end. Ordering and paying are not enough. That rule has its own article, and it is the most expensive one to get wrong: year-end business purchases and the available-for-use rule.

And the one that surprises people: prepaying does not work. Under the prepaid expense rule, an amount paid in advance is deducted in the year the benefit relates to. Paying next year's insurance premium in December buys you a prepaid asset on the balance sheet and no extra deduction. Stocking up on supplies has the same problem, because unused supplies at year end are inventory and the deduction comes when they are consumed. Both of these appear in almost every year-end article.

The last quarter, month by month

Most year-end planning happens in the final fortnight, which is the point at which almost nothing can still be changed. Working backward from your fiscal year end, not December 31:

Three months out, get a real number. Close the books to date and produce an interim income statement you believe. Project taxable income to year end including work in progress and accruals, compare it to where you expect to land next year, and check both against the small business limit if you are a CCPC. Review instalments paid so far against what the year is shaping up to require, since underpaid instalments accrue non-deductible interest at CRA's prescribed rate and a catch-up instalment before year end is cheaper than that interest. Without projections for both years you are guessing at which direction to move income.

Two months out, the decisions with lead time. Capital purchases belong here, because machinery and vehicles routinely take longer to arrive than owners assume and the asset has to be in place and working before the year closes. Owner compensation belongs here too, since the salary and dividend mix affects corporate tax, personal tax, CPP, RRSP room and next year's instalments, and it sometimes needs a directors' resolution. So does any genuine rescheduling of work into the new year, because the customer has to agree to it.

The final month, what can still move. Accruals for goods and services already received. A bonus declared before the year closes. Bad debt write-offs and inventory write-downs. Repairs finished rather than booked. Corporate donations. A top-up instalment.

After the year closes, a short list stays open: the 179-day window to pay an accrued bonus, personal RRSP contributions made within 60 days of December 31 and deducted against the prior calendar year, the corporate balance due two months after year end and three for a CCPC claiming the small business deduction, and the T2 itself six months after year end. Payroll remittances and GST/HST run on their own schedules regardless of your year end, so there is no timing play there, only penalties. The CRA deadline checker will give you the dates for your year end.

The ways this goes wrong

The deferral only moves the problem. Defer $60,000 into a year where it pushes you over the small business limit and the extra corporate tax can exceed everything the deferral saved. Defer aggressively for several consecutive years and you eventually meet the year where two years of income arrive together, usually alongside a demand for higher instalments.

Passive income feeds the grind. A CCPC's small business limit is reduced when the company and its associated corporations earn passive investment income above a threshold. Cash parked from a deferral and invested can contribute to that. The threshold has been amended, so check the current figure rather than an old one.

Cash flow takes the damage. Slowing collections to defer income is the wrong reason to slow collections. The interest saved is small and the collection risk is not. The same applies to buying equipment you did not need for a deduction worth a fraction of the price.

CRA looks at arrangements with no other purpose. A deferral has to reflect what actually happened. Backdated invoices, work "rescheduled" only on paper, and accruals for services nobody performed are misstatements rather than planning, and interest runs from the original due date. The general anti-avoidance rule exists for arrangements whose only real purpose is the tax result, and the penalty regime around it has been tightened in recent years. Timing that follows genuine commercial decisions is fine. Paperwork built backwards from the desired number is not.

Timing works in your favour when next year's income looks similar or lower, cash flow is stable, and the expenses you are pulling forward are ones you were going to incur anyway. Think twice when next year looks materially stronger or cash is tight. We run this as a two or three year projection rather than a checklist, which is most of what our advisory work involves, and the useful version happens in the third-last month rather than the last week.

All of our corporate and personal tax work

General information only, current at August 2026. Tax rules change and GST/HST status is fact-specific. Confirm your own position before relying on anything here.