Investing is one of those topics that feels more complicated than it actually is. When we first started reading about it, we came across index funds, ETFs, expense ratios, tax-advantaged accounts, and a great deal of confident advice written for Americans. It was genuinely hard to know where to start.
The concepts turn out to be simple. What makes it confusing is that most of what you will read online uses account names that do not exist in Canada. So here is the version we wish we had found, using the accounts that actually apply to us.
The Question Before the Question
Before any of this: investing and paying down debt are not the same decision, and for medical students the second one often wins.
If the money you would invest is money you borrowed on a line of credit, you are not really investing. You are betting that the market will outperform your interest rate, using borrowed money, on a timeline you do not control. That is a different and riskier proposition than the one most beginner articles describe. We wrote separately about whether you should invest at all while living on borrowed money, and it is worth reading before this one.
What follows assumes you have some money that is genuinely yours: savings from before medical school, summer earnings, a gift, or the surplus in a month where the disbursement stretched further than expected.
The Three Accounts That Matter in Canada
In Canada, the account you hold an investment in changes how it is taxed. There are three worth understanding as a student.
The TFSA. You contribute money you have already paid tax on, it grows tax-free, and withdrawals are tax-free. There is annual contribution room that accumulates from the year you turn 18, whether or not you have opened one. For someone with a low income now and a very high income later, this is usually the first account to fill, because the tax you avoid is tax you would otherwise pay at a physician’s marginal rate decades from now. [VERIFY: current annual TFSA contribution limit at canada.ca]
The RRSP. You contribute pre-tax money, it grows tax-deferred, and you pay tax when you withdraw it in retirement. The deduction is worth more the higher your income, which is why RRSPs generally make more sense later, once you are earning as a resident or attending, than they do now. Contribution room is based on earned income, so as a student with little or no income you will not have much of it anyway.
The FHSA. A newer account designed for a first home, combining the RRSP’s deduction with the TFSA’s tax-free withdrawal, provided the money goes toward a qualifying first home. Worth knowing exists, particularly if buying somewhere in the next fifteen years is plausible for you.
One important caveat for anyone reading this from abroad: these accounts have rules that interact with tax residency, and contributing to a TFSA while you are a non-resident of Canada can trigger penalties. If you are studying overseas, confirm your residency status before contributing to anything.
What to Actually Buy
This is the part people expect to be complicated and it is not.
An index fund is a fund that holds a broad slice of the market rather than trying to pick winners. An ETF is an index fund that trades on an exchange like a stock. In practice, for someone starting out, they do the same job.
The argument for them is not that they are exciting. It is that the alternative, picking individual stocks or paying someone to pick them for you, has consistently underperformed for most people over long periods, after fees. Fees are the part worth paying attention to. The difference between a fund charging 0.2% and one charging 2% sounds trivial and is not, because you pay it every year on the entire balance for forty years.
There are now single-fund options in Canada, sometimes called asset allocation ETFs, that hold a diversified global portfolio in one product and rebalance themselves. For someone who wants to make one decision and then not think about it during clinical placements, that is a reasonable answer.
We are not going to name specific funds. Partly because we are not qualified to, and partly because the moment a blog starts recommending products is the moment you should ask what it is being paid.
Why Start Now
The case for starting during medical school, when the amounts are small, is not about the amounts.
It is about time. We wrote about how compounding actually works in detail, but the short version is that money invested in your twenties does substantially more work than money invested in your thirties, and medicine already pushes your earning years later than almost every other profession. Doctors start late by structure. Anything that gets some money working earlier partially offsets that.
It is also about habit. Learning how a brokerage account works, what a trade confirmation looks like, and how it feels when the balance drops 15% is much better done with $500 than with $50,000. The lesson costs the same and the tuition is cheaper.
What Not to Do
A few things we have seen go wrong for people around us.
Do not invest money you will need within a few years. Elective travel, CaRMS costs, a flight home. That money belongs in a savings account, not in the market.
Do not invest borrowed money because the interest rate looks low. It is still leverage, and leverage cuts both ways.
Do not check it daily. It will not make you money and it will make clinical years worse.
Be sceptical of anything that requires you to act quickly. Most genuinely good financial decisions are still available next week.
Where to Learn More
If you want to go deeper, we wrote up the books that helped us most, with notes on what each one is good for. The Canadian personal finance community online is also substantially better than the general internet on this topic, and we keep the sources we trust on our Resources page.
The Bottom Line
Investing as a Canadian medical student comes down to a small number of decisions: sort out whether you should be investing at all given your debt, use a TFSA first for money that is genuinely yours, buy something broad and cheap rather than something clever, and leave it alone.
We are still learning this ourselves and we are not financial advisors. But the version of this that uses Canadian accounts and acknowledges that most of us are living on borrowed money is the version we could not find when we started, so this is our attempt at it.
References
- Government of Canada. (2026). Tax-free savings account (TFSA). https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/tfsa.html
- Government of Canada. (2026). Registered retirement savings plan (RRSP). https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/rrsps-related-plans.html
- Government of Canada. (2026). First home savings account (FHSA). https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/first-home-savings-account.html