During residency, taxes take care of themselves. You receive a T4, tax comes off every paycheque, and April is mostly paperwork.
Then you start billing. Fee-for-service income arrives with no tax withheld. For the first time, your income jumps — and nobody is setting money aside for the CRA but you.
For many new physicians and associate dentists, the result is a painful surprise about 16 months after they start practising. Here’s why it happens, and how to plan so it doesn’t derail your first years in practice.
Why the First Year Hits You Twice
The surprise usually comes in two waves.
Wave one: the April balance. Your first full year of billing produces a large tax balance owing, due April 30. Self-employed professionals can file until June 15, but interest on any unpaid balance starts from April 30.
Wave two: installments begin. The CRA requires quarterly tax installments when your net tax owing is more than $3,000 in the current year and in either of the two previous years. Once your first billing year crosses that line, reminders arrive — with payments due March 15, June 15, September 15, and December 15.
That’s how a new physician can end up paying last year’s full tax bill and this year’s installments in the same twelve months. In a year that may also include a home purchase, a wedding, or practice setup costs, it’s a cash crunch that catches capable people off guard.
The CPP Line Item That Surprises Everyone
As an employee, you paid half of your Canada Pension Plan contributions and your employer paid the other half. As a self-employed professional, you pay both halves — 11.9% on earnings up to the base ceiling, plus an additional enhanced contribution on a second tier of earnings above it.
The employer-equivalent half is deductible, which softens the blow, but it’s still a meaningful amount that rarely appears in a resident’s mental budget.
A Simple System for Your First Year of Billing
You don’t need a complicated plan. You need a few habits started early:
- Open a dedicated tax savings account and move a fixed percentage of every payment into it before you spend anything. Your accountant can suggest a percentage based on your province and expected income.
- Track deductible expenses from day one — professional college and association fees, malpractice protection costs, continuing education, and practice-related equipment. Missing receipts in year one is a common and avoidable loss.
- Pay installments on time. Late installments trigger interest charges that are not tax-deductible.
- Get an accountant who works with physicians or dentists before your first year ends, not in April.
When to Incorporate — and When Not To
New physicians often hear “incorporate right away.” That advice is incomplete.
A professional corporation’s main tax benefit comes from deferral: income left inside the corporation is taxed at the low small business rate until you take it out. If you need every dollar you earn to pay down student debt, buy a home, and fund your lifestyle, there may be little to defer — while setup costs, annual accounting fees, and a separate corporate tax return start immediately.
A few questions to ask before you incorporate:
- Is your income eligible? Fee-for-service billings generally can flow through a professional corporation. Salaried hospital or university employment generally cannot.
- Will you consistently earn more than you spend? The gap between income and spending is what incorporation works on.
- Have you met your provincial college’s requirements? Most medical and dental regulators require the corporation to be registered or permitted before it can practise.
For many, the right answer is to incorporate once spending stabilizes and surplus cash starts to accumulate — often within the first few years of practice, not necessarily on day one.
Student Debt vs. Investing: A Clean Way to Think About It
Most new graduates carry a professional student line of credit. Paying it down earns you a guaranteed, risk-free return equal to the cost of the debt — something no investment can promise.
One detail worth knowing: interest on a bank professional student line of credit is generally not tax-deductible, and it doesn’t qualify for the student loan interest credit available on government student loans. That makes every dollar of interest on it a true after-tax cost.
A sensible middle path for many new doctors: capture any employer or government matching first, keep a cash reserve for tax installments, then direct surplus toward the line of credit while building good investing habits with smaller regular contributions.
Protect the Income While It’s New
Your first year of billing is also the moment to lock in protection based on your new earning power. Disability coverage with a guaranteed insurability option, put in place while you’re young and healthy, lets you increase coverage as income grows without new medical questions later.
A Research-Backed Note on Investing Early
Eugene Fama and Kenneth French’s study “Luck versus Skill in the Cross-Section of Mutual Fund Returns” found that, after costs, very few actively managed funds beat the market, and the ones that did were hard to separate from luck. New physicians often hear confident stock tips from colleagues, especially about pharma and biotech names tied to their specialty. The research suggests that clinical familiarity rarely translates into a reliable market edge. A low-cost, globally diversified portfolio started early usually does more for a young professional than any single conviction bet.
The Bottom Line
The jump from residency to practice is the biggest income change of your career, and the tax system treats it very differently than your training years. Planning for the April balance, installments, and self-employed CPP — and timing incorporation to when it actually helps — turns a stressful first year into a strong financial foundation.
Starting practice or just finished your first year of billing? Book a private consultation with the team at financialadvice.ca or call at 587 718 8001 and we’ll map out your first-year tax plan, incorporation timing, and debt strategy.
