Dollar-cost averaging (DCA) means investing a fixed dollar amount on a regular schedule — say $300 every payday — regardless of price. It is the simplest way to build wealth without trying to time the market.
Why it works
- You automatically buy more shares when prices are low and fewer when high.
- It removes the emotional decision of “is now a good time?” — the answer is always “yes, on schedule.”
- It turns investing into a habit, not an event.
A quick example
Investing $300/month into a fund whose price bounces around:
| Month | Price | Shares bought |
|---|---|---|
| Jan | $30 | 10.0 |
| Feb | $25 | 12.0 |
| Mar | $20 | 15.0 |
| Apr | $25 | 12.0 |
You invested $1,200 and own 49 shares at an average cost of ~$24.49 — below the simple average price of $25, because you bought more when it was cheap.
DCA vs. lump sum
If you have a large amount to invest and a long horizon, investing it all at once has higher expected return, because markets rise more often than they fall. DCA wins on behavior and regret — it is easier to stick with and hurts less if markets drop right after.
Automate it. Set a recurring buy at your broker so it happens whether or not you are paying attention. The goal is to make the right action the default action.
What DCA is not
DCA does not prevent losses — if an investment keeps falling, averaging in still loses money. It manages timing risk, not the risk of a bad investment. Diversify first.
Next: make those contributions tax-smart with Accounts & Taxes.