Tax season frequently results in a tax refund for many Canadians. For instance, the Canada Revenue Agency (CRA) reported issuing more than 19 million refunds during the 2024–25 fiscal year. For self-directed investors, this refund ideally serves as a contribution to a portfolio, though the method of deployment — investing all at once or over time — remains a core consideration.
Two common strategies — dollar-cost averaging and lump-sum investing — each have distinct characteristics. The suitability of either approach appears to depend on an individual’s risk tolerance, time horizon, and comfort with market volatility.
What Is Dollar-Cost Averaging?
Dollar-cost averaging involves investing a fixed amount of money at regular intervals, regardless of market fluctuations. Over time, this tends to result in a different average price per share, as more units are acquired when prices are lower and fewer when they are higher.
DCA aims to mitigate timing risk by spacing investments, which may reduce the pressure to identify a specific entry point. This method attempts to add discipline to an investment plan and may be easier for some investors to maintain during market pullbacks.
DCA may be appropriate when:
- An investor aims to avoid entering the market at a temporary peak.
- A structured, repeatable investment plan is preferred.
- The investor is entering a volatile asset class or an uncertain market.
The intended benefit is the smoothing of the cost basis across different price points rather than relying on a single timing decision.
What Is Lump-Sum Investing?
Lump-sum investing involves placing all available capital into the market at once. The rationale tends to be based on the historical observation that markets have generally trended upward over the long term; thus, capital invested sooner has more time to potentially benefit from compounding.
Lump-sum may be appropriate when:
- There is a long-term investment horizon (e.g., 5 – 10+ years).
- The investor appears to be comfortable with short-term volatility.
- There is a general expectation that broad markets will rise over time.
Comparing the Two Approaches
There is no universal solution, though some historical data suggests that lump sum investment has outperformed DCA in rising markets, as a larger portion of capital is exposed to the market for a longer duration.
However, DCA aims to address behavioral discipline. If a lump-sum investment results in hesitation or anxiety during market dips, spreading investments tends to help an investor remain committed to their long-term strategy.
Practical Considerations for Your Refund
For those comfortable with volatility, a lump-sum deployment into diversified vehicles, such as ETFs or index funds, may offer a long-term advantage in rising markets.
For those prioritizing psychological comfort, breaking a refund into periodic contributions (monthly or quarterly) aims to reduce the stress of market timing.
Some investors may attempt to blend the two by investing a portion immediately and averaging the remainder.