- The Contribution Advantage: While the Registered Retirement Savings Plan (RRSP) dollar cap is strictly fixed ($32,490 in 2026), an Individual Pension Plan (IPP) contribution limit scales with age, allowing incorporated professionals age 40+ to contribute up to 65% more annually than an RRSP.
- 100% Corporate Tax Deductibility: All IPP contributions, actuarial valuation fees, investment management fees, and mandatory deficit top-ups are paid directly by the operating corporation as 100% deductible business expenses, reducing corporate active income.
- The “Past Service” Lump-Sum Injection: An incorporated professional who has paid themselves T4 salary in previous years can buy back “past service” dating back to incorporation, instantly transferring $100,000 to $400,000+ of cash out of the corporate account and into a tax-sheltered pension trust.
Incorporated Canadian physicians, dentists, lawyers, and business founders frequently hit the ceiling of conventional tax planning. They maximize their personal RRSP contributions, fund their TFSAs, and are left with hundreds of thousands of dollars trapped in corporate retained earnings—facing high corporate passive investment tax rates (50.17% upfront refundable tax on interest and foreign income).
The Individual Pension Plan (IPP)—governed under Section 147.1 of the Income Tax Act—is essentially a personal, customized single-member Defined Benefit pension plan established by an incorporated business for a connected shareholder. For high-earning incorporated professionals over the age of 40 earning a T4 salary exceeding $170,000, the IPP is the most potent corporate tax-sheltering instrument in Canada.
1. Annual Contribution Capacity: IPP vs. RRSP by Age
Under CRA guidelines, RRSP contribution room is capped at 18% of earned income up to the statutory limit ($32,490 in 2026). In contrast, IPP contribution limits are determined actuarially to fund a defined retirement benefit equal to 2% of indexed earnings per year of service. As you age, the present value required to fund that guaranteed stream rises dramatically:
| Age of Professional | 2026 Maximum RRSP Limit | 2026 Maximum IPP Contribution | IPP Advantage (Extra Tax Shelter) |
|---|---|---|---|
| Age 40 | $32,490 | $33,800 | +$1,310 / year (+4%) |
| Age 45 | $32,490 | $38,200 | +$5,710 / year (+18%) |
| Age 50 | $32,490 | $43,400 | +$10,910 / year (+34%) |
| Age 55 | $32,490 | $49,600 | +$17,110 / year (+52%) |
| Age 60 | $32,490 | $53,800 | +$21,310 / year (+65%) |
2. The Underperformance Advantage (The Deficit Top-Up)
Here is the single greatest hidden feature of an IPP: In an RRSP, if your investment portfolio drops in value during a bear market, your retirement wealth diminishes and you have zero tax recourse. In an IPP, the corporation is legally obligated to guarantee the pension payout (which assumes an actuarial net rate of return of 7.5% per year).
If your IPP investment portfolio only generates a 4% return or experiences a bear market drawdown, an actuarial valuation will declare a plan deficit. Under CRA rules, your corporation is permitted to make a massive, lump-sum tax-deductible cash contribution to cover the shortfall! A market downturn becomes a legal conduit to siphon more retained earnings out of the corporation into a creditor-protected, tax-sheltered pension trust.
3. Creditor Protection and Transferability
Under provincial pension legislation, IPP assets are 100% exempt from seizure by personal and corporate creditors, offering far superior asset protection than non-registered holding company investments. Furthermore, at retirement, the IPP can either pay an indexed lifetime pension, purchase a commercial annuity, or be transferred to a Locked-in Retirement Account (LIRA), linking seamlessly with our guide on Defined Benefit pension commuted value transfers and pension income splitting rules.