The pay debt versus invest question is not solved by comparing one interest rate with one expected return. Canadians also need to think about tax shelters, emergency cash, behaviour, loan terms, and what happens if income drops.
This guide gives a practical order of operations. It is not a command to pay every debt first or invest at all costs. It is a way to decide which risk deserves the next dollar.
Start with the interest-rate reality
A credit card at 20% is very different from a mortgage at 4.5%. Paying high-interest debt is usually like earning a high, certain after-tax return because every dollar paid avoids future interest.
Investing can beat low-rate debt over time, but the return is uncertain. A portfolio can lose money exactly when cash flow gets tight. That uncertainty is why the decision is partly risk management.
Emergency cash changes the answer
A person with no emergency fund should be careful about sending every spare dollar to debt or investments. Without liquidity, one car repair or job interruption can create new high-interest debt.
A practical middle path is often minimum payments, a small emergency buffer, then targeted debt payoff or investing depending on rate and account room.
Registered accounts can help, but not magically
TFSA growth and withdrawals are tax-free, RRSP contributions can create deductions, and FHSA can support a qualifying first-home purchase. These advantages matter, but they do not make risky investing sensible if the debt is expensive or the household is fragile.
RRSP investing gets stronger when the deduction is meaningful and the refund has a job. TFSA investing gets stronger when flexibility and tax-free withdrawals matter.
A practical decision order
First, handle minimum payments and high-interest debt. Second, build enough cash to avoid new borrowing. Third, compare lower-rate debt against investing using after-tax return, time horizon, and behaviour.
If the debt repayment gives a guaranteed return close to the realistic after-tax investment return, many households are better served by reducing debt stress. If the debt is low-rate and tax-sheltered investing room is available, investing can deserve part of the next dollar.