Prefer to listen? This article is based on Episode 13 of our Portfolio Talks podcast. Listen to the full episode here.
Here is a pattern we see with almost every new incorporated doctor client. They earn a strong income. They live below their means. They invest inside their corporation because “the tax rate is lower there.” All of the boxes are checked. On the surface, everything is being done right.
Then we pull open their statements and find $60,000 or $90,000 of passive income they never noticed sitting inside the corporation, quietly costing them thousands of dollars in lost small business tax benefits every single year. In the last twelve months alone, more than ten of the new clients we onboarded were in this exact position. Most of them had no idea.
The reason it goes unnoticed is subtle. If you are a high earning doctor already paying the general corporate tax rate on some of your income (which happens once your corporate profit crosses $500,000), the passive income grind does not show up as a new problem on your tax return. It shows up as “still paying the general rate.” No red flag. Just a quietly higher tax bill that you assume is normal.
Here is how to figure out if you have a hidden passive income problem, what to do about it if you find one and the bigger philosophical question of whether investing inside your corporation even makes sense in the first place.
What Actually Counts as Passive Income
To find the problem, you need to know what to look for. The CRA splits your corporate income into two buckets. Active business income is the business of doing your business. For a doctor, that is your MSP billings, your clinic revenue and anything else that comes from actually practicing medicine. Everything else is passive.
The passive income bucket is broader than most incorporated doctors realize. It includes:
Interest income. GICs, high interest savings accounts, corporate bonds. We see doctors with $500,000 or even $2 million sitting in GICs inside their corporation, unaware that the interest is grinding down their small business deduction.
Rental income. If your corporation owns a property that generates rental income, and rental income is not your main business, that is passive.
Royalties. Small oil and gas royalties, music royalties, book royalties. If the money keeps coming in without active work, it counts.
Taxable capital gains. When your investment portfolio rebalances, or you sell a winning position, the taxable half of that capital gain is passive income. Only the taxable half counts against your $50,000 limit. The other half flows into your Capital Dividend Account (CDA) and can eventually be distributed to you tax free.
Income from a side business inside your corporation. If you started a side hustle and ran it through your medical corporation instead of setting up a separate corp for it, that income can end up counted as passive.
Portfolio dividends from public companies. Dividends from Apple, RBC or any other public company you own inside your corporation are passive income.
What Does Not Count (and Where Doctors Get Confused)
Intercorporate dividends. If you have a holding company and an operating company (or two operating companies) and you move money between them via dividends, that is not passive income. You are shifting money within your own corporate structure, not earning new income.
Capital gains from selling shares of your own active business. If you sell shares of your dental clinic or medical practice, that gain is a capital gain but it is treated as connected to active business, not passive income. It is also potentially eligible for the Lifetime Capital Gains Exemption, which is a separate conversation.
The 50% of capital gains that flows to the CDA. As mentioned above, only the taxable half of a capital gain counts against your passive income limit. The other half builds CDA room for future tax free distributions.
If you are ever unsure whether something counts, assume it does. That is the safer default, and the CRA usually rules in favor of counting it.
How to Check If You Actually Have a Passive Income Problem
The threshold to know is $50,000 of passive income per year. Every dollar above that starts grinding down your small business deduction limit at a 5:1 ratio, and by $150,000 of passive income, your small business deduction is wiped out entirely.
The tricky part is that if your corporation earns more than $500,000 of active business income in a year, you are already paying the higher general corporate rate on the surplus. So the passive income grind does not create a new tax problem you can see. It just quietly shifts more of your small business income into the general rate, which you never notice because you were paying that rate on some of your income already.
Here is the quick way to check if you have a problem.
Look at every T-slip your corporation received in the last tax year. T3s, T5s, T5013s. If they exist, that is passive income landing in your corp. Add up the totals.
Print your corporate account statements for the last twelve months and mark anything that is not your active billings. Highlighter method works. Interest, dividends, rent, royalties, capital gains distributions from your investment accounts. Every deposit that is not from your active business income is a candidate for passive income.
Watch for unrecognized deposits. New tenders or merchants that show up on the corporate account statement without an obvious source. Investigate each one. That is often where the surprise passive income lives.
If your total for the year is under $50,000, you are fine. If you are between $50,000 and $150,000, you have a partial problem worth fixing. If you are over $150,000, your small business deduction is fully wiped out for the year and this needs immediate attention.
Quick Fixes If You Find a Problem Mid-Year
If you catch the problem before your fiscal year end (September or October, with a December year end), you actually have options. This is why we recommend doing this exercise mid-year rather than waiting for tax filing season, when most of these moves are no longer available.
Convert some shareholder loan draws into T4 salary. This is the most powerful move for doctors who have been informally drawing money from the corporation throughout the year. If you have taken out $180,000 in shareholder draws and you are sitting at $57,000 of passive income, you can declare $8,000 to $10,000 of those draws as T4 salary instead of a dividend at year end. That salary creates a corporate deduction, which reduces your active corporate income and tips the scales back in your favor. The rest of the shareholder loan can still be declared as a dividend if that fits better for you.
Time the sale of an appreciated asset around a fiscal year end. If you know you will be triggering a large capital gain (selling a commercial property, exiting an investment position that has run up, closing a real estate holding), and you have any negotiating room, structure the transaction to close near your year end rather than in the middle of it. That lets you split the taxable gain across two fiscal years and preserve some small business deduction in both years, instead of blowing it in one.
Look for legitimate business expenses you have not deducted. Not making up expenses, but reviewing what has been paid personally that should have been paid corporately. Association fees, licensing, continuing education, corporate insurance premiums. Every $10,000 of legitimate deductions is roughly $1,100 back in your pocket at the small business rate.
Absorb it if you have to. Sometimes you sold an asset you had held for ten years and the passive income spike is a one-time event. You pay the extra tax that year, take the hit and rebuild the following year. Your small business deduction is not lost forever. It resets each fiscal year.
The Long-Term Fix: Portfolio Structure
The quick fixes above solve the year you are in. The bigger question is how to build a corporate portfolio that does not generate this problem year after year.
The simplest lever is switching from a yield-focused portfolio to a growth-focused portfolio. If you are 35 or 45 and still in the accumulation phase, you do not need your corporate portfolio to spit out annual income. You need it to grow. A yield-focused portfolio (GICs, dividend-paying stocks, interest-bearing bonds, segregated funds that distribute annually) generates passive income every single year whether you want it or not. A growth-focused portfolio holds positions that appreciate in value without paying much annual income, and lets you control when you realize capital gains.
That control is the key. When you rebalance a growth portfolio, you decide when a gain gets triggered. You can time it around your fiscal year end. You can spread it across two years. You can crystallize a gain in a year when your active income is lower. None of these levers exist with a yield-focused portfolio, where income arrives on its own schedule.
Fund selection matters too. Some ETFs and pooled fund products rebalance internally and kick out T3s or T5s every year, even if you never sold anything. You get a tax slip for capital gains distributions you had no control over. Corporate class fund structures used to solve this by moving distributions between funds without triggering slips, but the tax rules around this changed in Budget 2016 and much of the industry has moved away from that structure. Some fund providers still offer versions of it, but the options are narrower than they were ten years ago. Before you buy a fund inside your corporation, check how often it rebalances and what kind of slips it issues.
RDTOH Is a Refund, Not a Prevention
This is worth clearing up because doctors sometimes hear about the Refundable Dividend Tax on Hand (RDTOH) account and assume it fixes the passive income problem. It does not.
RDTOH is a mechanism where a portion of the tax your corporation paid on passive investment income can be refunded when you eventually pay yourself a dividend. It softens the long term cost of corporate investing, and it should be part of your planning if you are going to have passive income anyway. But it does nothing to prevent the small business deduction grind in the year you actually experience it. That deduction is gone for that year. RDTOH just gives you some money back over time.
If you find yourself in a passive income problem, plan for the grind and plan to use RDTOH efficiently later. Do not confuse the two.
The Bigger Question: Should You Even Invest Inside Your Corporation?
This is where the conversation gets more philosophical, and it is worth spending a minute on because doctors sometimes take the passive income problem as a signal that they should not invest in the corp at all.
The answer is almost always neither extreme. Do not defer everything to the corporation. Do not skip corporate investing entirely either. What works is a coordinated blend across all the tools available to you.
TFSA. Max this out every year. The tax-free growth compounds without ever generating a T-slip or a tax problem. This should be the first dollar invested every year. Some of our clients have TFSAs worth $200,000, $300,000 or more from consistently maxing since 2009. That is a serious foundation.
RRSP. Contribute up to your hard stop number. What we mean by a hard stop is that for most doctors, RRSPs make sense up to a certain balance. Beyond that, the eventual mandatory RRIF withdrawals in retirement will push you into higher tax brackets and clawbacks on OAS, which defeats the purpose. Work out that hard stop number with a planner, and once you hit it, redirect the equivalent contribution amount into the corporation instead.
Corporate investing. Everything else beyond that goes into the corporation. Corporate dollars are taxed lightly on the way in, they can invest in a much wider set of things (real estate, private equity, private lending, corporate class solutions) and they give you optionality for opportunities that come up during your career. If a practice buy-in appears, or a piece of commercial real estate comes on the market, the corporate portfolio is what you deploy.
Paying down your primary residence. If you have room, direct some cash flow toward more frequent mortgage payments (biweekly instead of monthly, or an annual lump sum toward the principal). Depending on your rate and time horizon, this can be one of the highest guaranteed returns available.
The Case for an RRSP Meltdown
One concept worth understanding, because it changes how you should think about your RRSP contributions, is what planners call an RRSP meltdown.
Here is the scenario. You have been maxing your RRSP for 20 years. You have also been investing significantly inside your corporation. You are 58 and starting to think about retirement in seven years. If you follow the standard playbook (leave the RRSP alone until 71, then convert to a RRIF and start mandatory withdrawals), the numbers do not work in your favor. Between the RRIF minimums, OAS, CPP and your corporate income, you end up in a higher tax bracket in retirement than you were in during your working years. You also lose most or all of your OAS to the clawback.
The meltdown strategy involves gradually withdrawing from the RRSP in the years before retirement, at your marginal rate, to reduce the RRIF balance you eventually have to draw against. Combined with careful income splitting between spouses, corporate dividend timing and CDA distributions, it can produce a lower total tax bill in retirement than the “leave it alone” approach.
This is a real planning concept that is worth understanding early in your career. It is why the RRSP hard stop matters and why simply defaulting to “max the RRSP every year forever” is not always the right move.
The CPP Philosophy Question
The other question that comes up constantly is whether to opt out of CPP contributions when you are incorporated. Some accountants advise dividend-only compensation partly to avoid CPP contributions, which for an incorporated professional means paying both the employee and employer sides (roughly $8,000 a year at the maximum contribution level).
There is an actuarial break-even point around age 76 or 77. If you live past that age, CPP contributions come out ahead. If you die before that age, opting out and investing the money yourself would have been the better financial outcome.
But that framing misses the point. None of us know when we will die, and if you are a high income doctor, longevity is on your side statistically. Access to healthcare, nutrition, less physically punishing work, all skew life expectancy meaningfully higher than the general population. Planning for a longer life is the safer default, and CPP rewards that assumption.
There is also a benefit no other investment offers. CPP and OAS are both indexed to inflation. When cost of living jumps, as it did through the COVID period, your benefit adjusts with it. Nothing else in your retirement portfolio does that automatically. For a portion of your retirement income to be inflation-indexed and guaranteed for life is a powerful hedge against the risk of running out of money in a long retirement.
If you do opt out of CPP, be aware that the $8,000 a year you save has to actually be invested and left to grow. Skipping the CPP contribution and spending the savings is the worst of both worlds. You lose the CPP entitlement and end up with nothing to show for it.
The Bottom Line
The passive income problem is real, and for most incorporated doctors, it is running in the background whether they know it or not. Diagnosing it takes a few hours with a highlighter and your corporate statements. Fixing it takes some coordination between your accountant and your planner. Preventing it takes a portfolio built for growth rather than yield, and a compensation strategy that lets you course correct each year.
The bigger picture is that the corporation is one tool in a broader wealth strategy, not the entire strategy. TFSA first, RRSP up to your hard stop, then corporate investing for everything beyond that, with CPP and OAS running as an inflation-indexed base for retirement. That structure gives you flexibility, optionality and enough diversification to weather a bad year in any single vehicle.
Check your passive income before your fiscal year ends. Even one small correction now is worth more than a full audit at tax time next April.
Want the Full Conversation?
This article is based on Episode 13 of Portfolio Talks, where we walk through real client examples, the specific numbers, the philosophy behind corporate investing and the questions that come up most often for incorporated doctors. Listen to the full episode here and subscribe so you do not miss future episodes built specifically for physicians.
Sources
- Small business deduction rules and the passive income business limit reduction – Canada.ca – https://www.canada.ca/en/revenue-agency/programs/about-canada-revenue-agency-cra/federal-government-budgets/budget-2018-equality-growth-strong-middle-class/passive-investment-income/small-business-deduction-rules.html
- Corporation tax rates (including the small business deduction) – Canada.ca – https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/corporations/corporation-tax-rates.html
- About Refundable Dividend Tax on Hand (RDTOH) Balances – Canada.ca – https://www.canada.ca/en/revenue-agency/services/e-services/digital-services-businesses/business-account/about-refundable-dividend-tax-on-hand-rdtoh-balances.html
- Canada Pension Plan retirement pension – Canada.ca – https://www.canada.ca/en/services/benefits/publicpensions/cpp.html
- Old Age Security pension – Canada.ca – https://www.canada.ca/en/services/benefits/publicpensions/old-age-security.html
- Income Tax Folio S3-F2-C1, Capital Dividends (CDA) – Canada.ca – https://www.canada.ca/en/revenue-agency/services/tax/technical-information/income-tax/income-tax-folios-index/series-3-property-investments-savings-plans/series-3-property-investments-savings-plan-folio-2-dividends/income-tax-folio-s3-f2-c1-capital-dividends.html
This content is provided for general informational purposes only. It is not intended to provide investment, tax or legal advice, and should not be relied upon as such.