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The average incorporated doctor who comes to us for the first time is bleeding somewhere between $20,000 and $60,000 a year in avoidable tax. Not because of any single dramatic mistake, but because of a series of small decisions (or non-decisions) around how they pay themselves, how they manage cash flow between their corporation and personal accounts and how they clean up the mess after a big personal expense.
None of it is dramatic. All of it compounds. And by the time we sit down with a new client and pull up their tax return, the leak is often years old and thousands of dollars deep.
Here is where the money is actually going, why it happens even to smart, high income physicians and the specific fixes that can put roughly $24,000 back in your pocket every year.
The Two Silent Mistakes Right at Incorporation
Most of the damage starts before the corporation is even properly running. Two specific errors show up over and over.
Not updating your billing to the corporation. You go through the process of incorporating. You have your lawyer, your accountant, your bank accounts. Everything is legally set up. And then life gets busy. You do not update MSP, your billing platform or whoever is sending your income. So your funds keep landing in your personal account.
Here is what that actually costs. Say you have earned $250,000 halfway through the year. If that income had been landing in your corporation, you would owe roughly $27,500 in corporate tax at BC’s 11% small business rate. Because it landed personally instead, you owe closer to $81,000 in personal tax. A $53,500 difference on six months of billings, purely because a form did not get updated.
We see this constantly. New physicians and dentists so close to the finish line, then a hundred other priorities take over. The fix is simple. The moment your incorporation paperwork is done and your corporate bank account is open, update your billing that week, not next quarter.
Missing corporate expense deductions. Once billings are properly flowing, the next 12 to 24 months are usually messy on the expense side. Association fees, professional dues, licensing, continuing education, corporate insurance premiums (many of them still get charged to the personal credit card or paid from the personal chequing account).
Every $10,000 of legitimate corporate expenses left on the personal side is about $1,100 of free tax savings you left on the table. Multiply that across a couple of years and it adds up fast. If it takes money to make money, it is almost always a deductible expense on the corporate side. Track it. Move it. Do not eat the cost because a receipt is sitting somewhere in your inbox.
The Shareholder Loan Cycle: The Real Killer
Now the bigger issue. Once billings are flowing into the corporation, the next mistake is treating that corporate account like a personal chequing account. You need $8,000 for a vacation. You transfer it. You need $15,000 for a home renovation. You transfer it. You need cash for a wedding, a car, a new roof. You transfer.
Every one of those transfers, if not declared as salary or a dividend, becomes a shareholder loan. The Income Tax Act gives you a window (essentially two fiscal years) to clean it up. If you do not, it gets declared as income on your personal tax return at your marginal rate, which is often 50% or higher.
Here is a real client example. Halfway through the year, this doctor’s tax picture looked like this. Total income $287,000. Of that, $216,000 was corporate business income being taxed at the 11% rate. Fine. $59,000 was a shareholder draw taken from the corporate account to fund personal spending. On its own, that is roughly on pace for a normal year for this client (about $120,000 to $130,000 in draws).
The problem was the prior year. Last year’s shareholder loan had to be cleared this year. That cleanup added an extra $57,000 in personal taxes owed for the current calendar year. So on paper, they had drawn $59,000. In reality, once you factor in the tax cleanup from last year, they had already committed to about $116,000 of personal tax exposure, halfway through the year, before spending another dime.
The classic response to this is to just declare the leftover shareholder loan as a dividend at tax time. Cheaper than declaring it as salary, right? Sort of. Here is another real number. A doctor who paid themselves $190,000 out of the corporation without any real cash flow strategy ended up with $44,000 in tax owing when the accountant declared it as a dividend. Total tax hit for the year: about $68,000, some of which then pushes into next year and starts the cycle over.
This is what “salary vs dividends” actually looks like in practice for most incorporated doctors. Not a clean intellectual choice. A reactive cleanup at tax time that keeps growing.
Why Ignoring a Shareholder Loan Is Riskier Than People Think
Some doctors just run a perpetual shareholder loan balance. The accountant flags it every year. The doctor waves it off. It feels like a paperwork thing, not a real thing.
Here is the actual risk. The CRA can audit you at any time. If you are audited with a large shareholder loan balance and it has not been cleared inside the allowable window, they can force you to pay the entire balance back immediately as personal income. That means depleting corporate cash, liquidating registered accounts or raising capital somewhere to cover the tax bill in one hit. Ignoring the problem does not make it go away. It just makes the eventual bill worse.
How to Actually Fix an Existing Shareholder Loan
The clean answer is to pay it back with a big salary or dividend, absorb the tax hit and move on. For most doctors, that is unpalatable because the balance is often $200,000 to $400,000 by the time it becomes a real problem.
There are a few workable alternatives.
Use home equity to inject cash back into the corporation. If your primary residence has meaningful equity (say you owe $700,000 on a home worth $1.4 million), you can refinance and pull equity out. Send that cash back into the corporation to clear the shareholder loan balance. Your personal mortgage payment goes up, which increases your cash flow needs, but you now have a large lump sum sitting in the corporation that can be invested.
If that money is invested thoughtfully, capital gains can start building Capital Dividend Account (CDA) room, which becomes tax free money to distribute later. So you are essentially trading a higher mortgage payment now for a bigger and more tax efficient corporate portfolio. The tradeoff has to be modeled against your cash flow, but for the right client with equity and a long time horizon, it works.
Cut personal spending for one to two years. Less exciting. Sometimes the fastest way out is to pay yourself less, run a leaner personal budget and use the difference to clear the loan through modest annual dividends. Not glamorous, but it works.
Prevent it from happening in the first place. For anyone earlier in their career who has not gotten into this problem yet, this is where the real value is. Build a proper personal cash flow: know what your lifestyle costs, allocate money on the personal side for taxes so you are not surprised in April and stop treating the corporate account as an overflow chequing account.
The Magic Number: $187,000 Salary
For most incorporated doctors, the ideal compensation structure is a blend of salary and dividends. The salary piece usually lands at around $186,000 to $187,000, which is the earned income level needed to max out RRSP contribution room for the current year. The rest gets taken as dividends for flexibility, bonuses and one-off expenses.
Why $187,000? It is the number that quietly unlocks the most benefits.
It maxes your RRSP contribution room, which builds one of the most powerful long term wealth tools available on the personal side. It also builds Canada Pension Plan (CPP) contributions all the way through both the first and second earnings ceilings, which locks in an inflation indexed lifetime income benefit for retirement. It creates the T4 income history you need to eventually set up an Individual Pension Plan (IPP), which is one of the most powerful tax planning moves for doctors 45 and older. And it creates a corporate deduction that reduces corporate taxable income, which is especially useful if your passive income is starting to grind down your small business deduction.
Every dollar above that RRSP earned income threshold gets diminishing returns from a salary standpoint, which is why dividends usually make sense for the rest of the compensation.
Why CPP Is Worth the Contribution
A lot of doctors dislike the idea of paying CPP because as an incorporated professional, you pay both the employee and employer side. That is real money. But the value is often underappreciated.
CPP is one of the very few sources of income that is fully indexed to inflation and guaranteed for life. Higher income doctors also tend to live longer than average due to access to care, nutrition and lifestyle. That combination (a longer than average life expectancy plus a lifetime inflation-indexed income) makes CPP genuinely valuable, not just a tax you pay.
Skipping CPP by taking dividends only saves you a few thousand dollars a year today and costs you tens of thousands in guaranteed retirement income later.
Income Splitting: What Actually Works Under TOSI
One of the most misunderstood areas for new doctors is income splitting with a spouse or family member. The old strategy of paying your spouse or kids a modest dividend to shift income into a lower bracket largely died in 2018 when the Tax on Split Income (TOSI) rules were expanded.
Here is what still works.
An active spouse or child. If your spouse or an adult child is actually working in the practice, averaging 20 or more hours a week (either this year or averaged over the past five years), they can be paid via dividends or salary at fair market value. Documentation matters. If audited, the CRA wants to see logged hours, a defined role and evidence of real work.
An inactive spouse who does occasional work. A spouse who helps with bookkeeping, admin, MOA duties or social media for the practice can be paid a reasonable amount for that work. Reasonable meaning what you would pay an unrelated person to do the same job. Overpaying is where doctors get in trouble. Pay your spouse $100,000 for running your social media two hours a week and the CRA can apply TOSI, attribute the income back to you and tax it at your top marginal rate. So the “savings” become a $53,000 tax hit.
Over age 65. This is the retirement planning door most doctors do not know about. Once both spouses are over 65, you can split investment income and dividends from the corporation with a spouse who has not been actively involved in the business. If you and your spouse both need $150,000 of personal income in retirement, you can structure the corporate compensation as $150,000 each rather than $300,000 to one spouse. This is a legitimate and powerful way to lower the household tax bill in retirement.
Children under 18. This one is essentially closed. Historically, high earning parents used to pay dividends to minor children to fund household expenses or education. Under current TOSI rules, income paid to minors is almost always attributed back to the parent and taxed at the highest marginal rate. If you have heard from an older colleague that they used to do this, that is history. It is not a current strategy.
The Bigger Point: Do Not Let the Tax Tail Wag the Dog
Everything above is designed to help you keep more of what you earn. But the real message is simpler than that. Your compensation strategy exists to support the life you actually want to live. Not to minimize tax at the expense of everything else.
Some doctors will design their entire cash flow around paying zero personal tax this year and end up unable to spend meaningfully on their family, their goals or their sanity. That is not tax planning. That is tax paralysis. The goal is to pay less than you are paying now, keep the money working inside the right structure and still have the flexibility to live.
Integration in the tax system means that whether you pay yourself salary, dividends or a blend, the total tax bill over your lifetime lands in a similar place. What changes is the timing, the flexibility and the layered benefits like RRSP room, CPP, IPP eligibility and CDA. Those are the levers worth planning around.
The doctors who get this right treat the salary vs dividends question, the shareholder loan question and the cash flow question as one integrated conversation, revisited each year. Not one decision made once and left alone.
If any of the scenarios above sounded uncomfortably familiar (the shareholder loan that keeps rolling over, the annual surprise tax bill, the vague sense that money is leaking somewhere), that is the signal to sit down and rebuild the structure. The $24,000 is real. So is the peace of mind that comes with knowing your cash flow is running the way it should.
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This article is based on Episode 11 of Portfolio Talks, where we walk through real client examples, specific dollar figures and the exact cash flow fixes that save incorporated doctors thousands a year. Listen to the full episode here and subscribe so you do not miss future episodes built specifically for physicians.
Sources
- 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
- 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
- Income sprinkling and Tax on Split Income (TOSI) – Canada.ca – https://www.canada.ca/en/revenue-agency/programs/about-canada-revenue-agency-cra/federal-government-budgets/income-sprinkling.html
- CPP contribution rates, maximums and exemptions – Canada.ca – https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/payroll/payroll-deductions-contributions/canada-pension-plan-cpp/cpp-contribution-rates-maximums-exemptions.html
- Income Tax Folio S3-F1-C1, Shareholder Loans and Debts (subsection 15(2) of the Income Tax Act) – 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/folio-1-shares-shareholders-security-transactions/income-tax-folio-s3-f1-c1-shareholder-loans-debts.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.