Investing habits
Dollar-Cost Averaging Explained (With a Simple Example)
What dollar-cost averaging means, how investing a fixed amount on a schedule works, a worked example, and its real pros and cons.
Beginner investing lessons and fake-money practice from the maker of Quoliv.
Quick answer
Dollar-cost averaging means investing the same amount of money at regular intervals—say €100 every month—no matter what the price is. You automatically buy more shares when prices are low and fewer when they are high. It reduces the stress of timing the market, but it doesn't guarantee a profit or protect against losses.
What you’ll learn
- You invest a fixed amount on a fixed schedule, regardless of price.
- Lower prices buy more shares; higher prices buy fewer.
- It removes the pressure of guessing the 'right' moment.
- It doesn't prevent losses if the investment keeps falling.
This explanation is part of our Long-Term Investing lessons path, where you can explore the idea in short lessons and quizzes.
How it works
Instead of trying to pick the perfect day to invest, you choose an amount and a schedule and stick to it. Many people do this naturally by investing part of each paycheck.
A worked example
Say you invest €100 a month in a fund for four months, and its price moves like this:
| Month | Price per share | Shares bought with €100 |
|---|---|---|
| 1 | €20 | 5.00 |
| 2 | €16 | 6.25 |
| 3 | €10 | 10.00 |
| 4 | €18 | 5.56 |
You invested €400 and own about 26.8 shares, an average cost of roughly €14.91 per share—lower than the €16 average price, because the cheap months bought more.
Why people like it
- No market timing: nobody reliably predicts short-term moves, and DCA doesn't ask you to.
- Emotion control: a schedule keeps you from panic-selling or FOMO-buying.
- Easy to start small: regular modest amounts build a habit.
- Can be automated with recurring investments at many brokers.
The honest downsides
If an investment keeps falling for years, regular buying still loses money. DCA changes your average price; it doesn't change the quality of what you're buying.
If you already have a lump sum, studies of past markets have found that investing it all at once has often come out ahead, simply because markets have tended to rise over time. But it can feel much worse if prices drop right after, and many people choose DCA for peace of mind. Neither approach is guaranteed.
Per-trade fees can also eat into small, frequent purchases, so check costs.
Sources and methodology
This guide was written for education using the primary sources below. It does not evaluate your finances or recommend an investment. Read our editorial policy.