RRSP or leave it in the corporation? The parking question

Both are deferrals, and neither is a discount. A dollar contributed to an RRSP is deducted from your income now, grows untaxed while it sits, and is fully taxable as ordinary income when it comes out. A dollar left in your corporation has borne one layer of corporate tax at the small-business rate, grows against a personal tax bill still waiting, and stays under corporate rules that can be legislated again while it waits. The rate comparison rarely decides this. Three other mechanics do: the RRSP lane only opens if you paid yourself salary, the corporate lane has no ceiling and no gate, and only one of the two sits outside the reach of your business’s creditors.

What each one is doing with the tax

An RRSP contribution is a deduction against your personal income, and the deduction can be claimed in the year you contribute or held and claimed later. Inside the plan nothing is taxed — no slip, no interaction with anything your corporation files. On the way out, the whole withdrawal is ordinary income at your marginal rate.

Leaving profit in the corporation is not a deduction to anybody. The money simply never becomes your personal income. It has paid one layer of tax — 9% federally on the first C$500,000 of active business income for an eligible Canadian-controlled private corporation in 2026, plus your province’s small-business rate — and the rest waits for the money to come out, whenever that is and in whatever form. Salary is what creates a deduction on that route, which is where the two lanes touch.

The RRSP lane opens a year after you pay salary

Contribution room is built from earned income. Salary is earned income; dividends are not. Take the whole draw as dividends and you create no room at all — and the missed years do not come back. You cannot manufacture 2024’s room in 2029.

Room built by this year’s salary is available the year after, so an RRSP contribution rests on a payroll decision made at least a year earlier. Unused room carries forward, which softens the timing without removing the dependency: salary has to have created it. The room mechanics and what salary costs to run — CPP on both halves, the payroll account, the remittance calendar — are in salary or dividends. The number that matters here is what your room will absorb, because it is a hard ceiling. The corporate lane has none; a corporation can hold whatever the business earned.

What the money earns while it sits

Inside the RRSP, growth is untaxed and invisible to your corporation. Interest, dividends and realized gains in the plan produce no slip and nothing that touches the small-business limit.

Inside the corporation, the same portfolio is taxed on its own track at a high corporate rate — and, the part that costs more, a year’s investment income past a threshold shrinks the following year’s federal small-business limit, re-rating active profits that had nothing to do with the portfolio. The thresholds, the associated-group rule and what a rebalancing year does to the figure are in the deferral and the grind. For the parking question the point is narrow: registered growth never enters that calculation, and corporate growth always does.

Getting out is scheduled on one route and not the other

The corporate route leaves the exit under your control. You choose the year the money reaches you and the form it takes, and nothing forces it out on a date. That flexibility is much of what owners are buying.

The RRSP route has dates. Tax is withheld when you withdraw, at rates that step up with the size of the withdrawal, and the withdrawal is ordinary income regardless of what earned it — a capital gain realized inside a plan comes out taxed the same as interest, and the amount counts toward income-tested benefits. At a set age the plan must be converted into a registered retirement income fund, with a minimum you have to withdraw each year whether you want the money or not. Two named exceptions let money out early without immediate tax — a first-home withdrawal and a training one — each with a repayment schedule attached. Contributing to a spousal plan changes whose income the eventual withdrawal is.

Both routes share a last deadline nobody chooses: on death an RRSP or RRIF is generally brought into income on the final return unless it rolls to a spouse or common-law partner, and the corporation’s shares are generally deemed disposed of at fair market value on the same return. Neither balance quietly disappears.

If a claim ever lands on the business

This is the mechanic most comparisons leave out, and it does not net to zero. Money inside the corporation sits on the balance sheet a business claim reaches — a supplier, a lease, a judgment. Registered plans are generally protected from creditors in a bankruptcy under federal law, with contributions made inside a window before the filing clawed back; outside bankruptcy the protection depends on provincial rules and on the type of plan.

Two limits carry over from the corporate side. Personal guarantees follow you regardless of structure. And timing decides everything: money moved after a claim already exists can generally be attacked and unwound, which is as true of a contribution as of a dividend paid up to a holding company. Protection gets built in the quiet years or not at all — the five-question test covers the corporate half of that.

A worked example: C$100,000 of profit above what you need

Illustrative, round numbers, December 31 year-end. Your corporation has covered payroll and your living costs and has C$100,000 left over. You have accumulated room, built by salary in earlier years.

Left in the corporation, the C$100,000 is active business income. Federal tax at 9% takes C$9,000 and your province takes more on top, so somewhere in the high C$80,000s reaches the investment account. That base compounds, what it earns is taxed at the corporate investment rate, and how much it earns sets next year’s small-business limit. The personal tax is still ahead of you, at a time and in a form you pick.

Paid out as salary and contributed, the arithmetic runs differently. The corporation deducts the C$100,000, so no corporate tax is paid on it. You report C$100,000 of employment income and deduct a contribution of the same size, the two roughly cancel, and personal tax on that slice is close to nil in the year. Close to the full C$100,000 lands in the plan — a larger parked base than the corporate route produces per dollar of profit. What it cost: CPP on both halves, the payroll work, and enough accumulated room to absorb C$100,000, which is more room than one year of salary creates.

Both figures are pre-tax. So the comparison is not which number is bigger this year. It is a larger base that leaves on a schedule at ordinary rates, against a smaller base that leaves when you say so, under corporate rules that will be amended several more times first.

The order the questions get asked

None of this says which lot to use; your facts do. The order is stable, though, and taking it out of order is what produces plans that later have to be undone.

• Money you genuinely need in the next two or three years is not parking at all.
• Room comes next: it is the only constraint with both a hard ceiling and a one-year lead time, and what last year’s salary created sets what is available now.
• Where the corporation sits against the passive-income threshold decides how expensive the corporate lane is about to become — next year’s rate, not this year’s return.
• What CPP costs you turns on your age and how long you expect to draw the pension.
• Whether a claim against the business is plausible is not a tax question, and when the answer is yes it outranks the tax ones.

Most owners use both lots. The mix gets re-run annually because most of those answers change every year.

What Cadence does

We set the salary figure against the room you will actually use before the year closes rather than after, because the room available next year is decided by a payroll decision made this one. The rest follows from it: the dividend piece, the corporate and personal instalments that follow, and what the corporation’s investment income is doing to next year’s small-business limit. The owner’s personal return is prepared in the same file as the corporate one, so the two are never decided separately. An annual compensation review is in every package; the mid-year re-check — where this actually gets settled for consultants and agency owners whose income moves during the year — is in the year-round packages. What the money buys once it is parked is an investment question, and not ours.