IPP vs RRSP for an Incorporated Business Owner in Ontario: How to Compare Them

For most incorporated business owners in Ontario, the honest comparison is this: an RRSP gives you more flexibility and almost no cost, while an Individual Pension Plan (IPP) gives you more deductible contribution room — but only once you are old enough and paid enough T4 salary for the actuarial math to favour it. The rough dividing line is age: below the late thirties an RRSP usually wins outright, and the gap in favour of an IPP widens each year after that, becoming meaningful for owners in their late forties and fifties who draw a substantial salary. Neither is automatically "better" — they solve different problems, and the right comparison depends on your salary structure, your age, how long your corporation will keep operating, and how much flexibility you want to keep.

The two structures, in plain English

An RRSP is a personal savings account with a tax deduction attached. You contribute, you deduct, the money grows tax-sheltered, and you pay tax when you take it out. You control the investments, you can withdraw at any time (with tax), and you must convert it to a RRIF or annuity by the end of the year you turn 71.

An IPP is a defined benefit pension plan that your corporation sponsors, with you as (usually) the only member. Instead of setting a contribution amount, the plan promises you a pension formula — commonly 2% of your earnings for each year of service. An actuary then calculates what the corporation must contribute to fund that promise. The corporation makes the contributions and deducts them as a business expense. The money is pension money: locked in, governed by pension rules, and not yours to withdraw on a whim.

That single difference — a promised benefit versus a chosen contribution — drives everything else.

Where the 2026 numbers actually land

The CRA sets both ceilings, and they are worth knowing before any sales conversation.

For 2026, the CRA's RRSP dollar limit is $33,810, and your personal room is the lesser of that figure or 18% of your prior-year earned income. Maxing out in 2026 therefore requires roughly $187,800 of 2025 earned income. The CRA also publishes a defined benefit limit of $3,932.22 of annual pension per year of credited service for 2026, alongside a money purchase limit of $35,390 — all listed on the CRA's MP, DB, RRSP, DPSP and TFSA limits table.

Here is the key mechanic: the RRSP limit is a flat cap that ignores your age. The IPP limit is a pension cap, and the cost of funding that pension rises every year you get older, because there are fewer years left for investment growth to do the work. A 42-year-old and a 58-year-old promising themselves the same pension need very different amounts of money in the plan today. That is the entire source of the IPP's extra room.

There is a second mechanic worth naming. IPPs are funded on a prescribed assumption — historically a 7.5% long-term return with wage inflation built in. If the plan's actual investments underperform that assumption, the actuary's next triennial valuation can require additional deductible "top-up" contributions from the corporation. Some owners see that as a feature; others see it as an obligation they did not want.

When an IPP tends to look attractive

In practice, the profile is fairly specific:

• Age 45 or older, and the case strengthens materially through the fifties.
• T4 salary well into six figures, paid consistently. No salary, no IPP — the plan is built on employment income.
• A corporation with reliable active business income that will keep operating for years, since the corporation is the plan sponsor and must be able to fund it.
• A preference for more money out of the corporation and into a locked, creditor-protected, tax-sheltered structure, rather than sitting in a corporate investment account.
• Long service history, which may allow a past-service funding calculation going back to earlier years of employment with the corporation.

If you are paying yourself mostly in dividends, the conversation stops before it starts — which is why the salary vs dividends guide is usually the first document to work through, not the last.

"The question I get in London is usually 'which one is better,' but the honest answer is that an IPP is a bigger container with a lock on it and an RRSP is a smaller container you can open any time. You're choosing between room and flexibility, not between good and bad." — Marc Pineault, retirement planner in London, Ontario

When the RRSP is the more sensible tool

An RRSP costs nothing to maintain, has no actuary, no valuations, no annual filings, and no funding obligation if markets disappoint. You can stop contributing in a bad year and nobody sends a letter. You can withdraw early if the business needs you to, painful as the tax may be.

For an owner in their thirties, an owner whose income swings wildly year to year, an owner planning to sell the business within a few years, or an owner who simply wants fewer moving parts, that simplicity is worth a great deal. Paying $3,000 a year in actuarial and administration costs to unlock $8,000 of extra deductible room is not an obvious trade.

A worked example

Consider an illustrative incorporated owner in London, Ontario — call her the owner of a professional services corporation. She is 55, has paid herself a $190,000 T4 salary for many years, holds $620,000 in her RRSP, and has $1,300,000 sitting in a corporate investment account. Every figure below is a rounded illustration, not a quote; only a plan actuary can produce real numbers.

Step 1 — RRSP room for 2026. 18% × $190,000 = $34,200, which exceeds the CRA's $33,810 cap, so her room is $33,810.

Step 2 — IPP current service cost. At 55 with that salary, an actuary might value one year of new pension accrual at roughly $50,000. Extra deductible room this year: about $16,200.

Step 3 — Past service. Suppose the actuary values 15 years of prior service at $430,000. CRA rules require a qualifying transfer from her RRSP first — say $290,000. The corporation then makes a deductible past-service contribution of about $140,000 to cover the shortfall.

Step 4 — What that does to the corporate account. $1,300,000 − $140,000 = $1,160,000 left in the corporation, with $140,000 now inside a tax-sheltered pension. The corporation deducts the $140,000 against active business income; at Ontario's combined small business rate of 12.2% that is roughly $17,100 of corporate tax deferred, and at the 26.5% general rate roughly $37,100.

Step 5 — The costs and trade-offs. Ongoing actuarial, administration, and trustee fees of roughly $2,000–$4,000 per year, a valuation every three years, and $290,000 of formerly flexible RRSP money now locked into pension rules. The past-service contribution also generates a past service pension adjustment that reduces her personal RRSP room.

Run the same exercise at age 40 on a $120,000 salary and the extra room largely evaporates. That is why age and salary do most of the work in this decision. If you want to sketch your own version of the arithmetic, the free retirement planning calculators are a reasonable starting point before any professional engagement.

The downstream effects people forget

Whichever container you choose, the money eventually comes out as taxable income — and that is where the decision touches everything else.

Larger registered balances mean larger minimum withdrawals later, which is the entire subject of the RRIF withdrawal strategy guide. Higher taxable income in your late sixties and beyond interacts with the OAS recovery tax, which begins once net world income exceeds $93,454 for the 2025 income year, according to Canada.ca's Old Age Security pension recovery tax page. Owners who build very large registered balances sometimes discover in their seventies that they have engineered themselves into a clawback, which is why the OAS clawback strategy guide and the RRSP meltdown guide belong in the same conversation as the IPP decision, not fifteen years afterward.

On the regulatory side, registered pension plans in Ontario fall under the oversight of the Financial Services Regulatory Authority of Ontario, though an IPP whose only members are "connected persons" is generally exempt from most provincial pension standards requirements and is administered primarily under CRA rules. Confirm the treatment for your specific plan rather than assuming.

How to think about the decision

A reasonable sequence looks like this. First, settle your compensation structure, because an IPP requires T4 salary. Second, get an actual actuarial illustration rather than a rule of thumb — the extra room is either meaningful in your situation or it is not, and only real numbers will tell you. Third, weigh the value of the additional deduction against the cost, the locked-in nature of the money, and the ongoing funding obligation. Fourth, look at what the larger registered balance does to your taxable income and benefit eligibility in your seventies and eighties.

Marc Pineault, a retirement planner in London, Ontario, works with incorporated owners across Southwestern Ontario on exactly this kind of sequencing — not because one structure is superior, but because the answer genuinely changes with age, salary, business timeline, and what the rest of the retirement picture looks like. An IPP is a durable commitment made by a corporation on your behalf. It deserves a decision made slowly, with your accountant and an actuary in the room.

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This article is for educational purposes only and does not constitute personalized financial advice. Please consult a qualified professional before making any financial decisions.