Dollar-cost averaging (DCA) means investing a fixed amount at regular intervals (weekly/monthly), regardless of price. In Europe you’ll hear the same idea as euro-cost averaging.
Why people use it
- Removes the need to “call the bottom”
- Builds the habit of investing
- Buys more units when prices are low, fewer when high
Simple illustration
Suppose you invest €200/month into the same ETF:
| Month | Price | Units bought (approx.) |
|---|---|---|
| 1 | €100 | 2.0 |
| 2 | €80 | 2.5 |
| 3 | €100 | 2.0 |
Average purchase price is pulled down by the cheaper month — without forecasting.
DCA vs lump sum
Historically, investing a lump sum immediately often wins on average because markets trend up — but DCA can win on behaviour if a lump sum would make you freeze or panic.
| Situation | Lean toward |
|---|---|
| Steady salary, no big cash pile | DCA / standing order |
| Large inheritance, long horizon, calm temperament | Consider lump sum or staged 3–6 month deploy |
| Nervous about all-in timing | DCA |
Automation tips
- Align contribution day with payday
- Invest into the underweight sleeve when rebalancing with cash flow
- Don’t pause DCA just because headlines are scary (unless your plan says so)
Key takeaways
- DCA is a behaviour tool as much as a return tool.
- Consistency beats perfect entries for most DIY investors.
- Track contributions across brokers so you don’t “DCA” into an already overweight account.
Educational only — not personalised investment advice.