Dollar cost averaging (DCA) is the practice of investing a fixed amount of money at regular intervals — weekly, fortnightly, or monthly — regardless of market conditions. Rather than trying to time the market, you invest consistently and automatically average your purchase price over time.
How Dollar Cost Averaging Works
Instead of investing a $12,000 lump sum once a year, a DCA investor invests $1,000/month for 12 months:
| Month | VAS price | Units purchased |
|---|---|---|
| Jan | $95.00 | 10.5 units |
| Feb | $88.00 | 11.4 units |
| Mar | $82.00 | 12.2 units |
| Apr | $91.00 | 11.0 units |
| May | $98.00 | 10.2 units |
| Jun | $103.00 | 9.7 units |
When prices are lower (March), your fixed $1,000 buys more units automatically. When prices are higher (June), you buy fewer. Over time, your average purchase price is typically lower than the average price over the period.
Total units purchased: 65 units Average cost per unit: $12,000 ÷ 65 = $184.62 (illustrative — not real VAS prices)
Why DCA Is Effective for Most Investors
1. Removes market timing risk
No one consistently knows when markets are about to rise or fall. DCA sidesteps this entirely — you buy at all price levels, including the lows you’d miss if you tried to time the market.
2. Reduces emotional decision-making
DCA automated via direct debit removes the weekly decision of “is now a good time to invest?” — a decision most investors would make poorly in volatile markets.
3. Aligns with how income arrives
Most Australians receive income fortnightly or monthly — DCA naturally aligns investing with paydays, making it practical to implement.
4. Reduces the psychological cost of lump sums
Many investors feel uncomfortable deploying a large lump sum into markets at any price. DCA spreads this discomfort across smaller, more manageable tranches.
DCA vs Lump Sum — What Does the Data Show?
Research consistently shows that lump sum investing (deploying all available capital immediately) outperforms DCA approximately two-thirds of the time over long periods — because markets trend upward over time, and the money spent averaging in is not invested and growing.
However:
- DCA significantly reduces the risk of catastrophic timing (investing a large lump sum just before a major crash)
- DCA performs better in falling markets than rising markets
- For regular salary investors (most Australians), DCA is the default approach — you don’t have a lump sum, you have monthly income
See Lump Sum vs DCA Australia for a detailed comparison.
How to Implement DCA in Australia
Via brokerage (manual or automatic)
- Open an account with SelfWealth, Pearler, or CommSec
- Set up a regular direct debit from your salary account to your brokerage cash account
- Buy your chosen ETF(s) on the same day each month
Pearler is specifically designed for automated regular ETF investing — it can automatically invest your cash contribution into nominated ETFs on a set schedule, without manual trades.
Via micro-investing apps
Raiz and Spaceship allow scheduled weekly or monthly contributions — effectively automating DCA for small amounts.
Via super
Employer SG contributions are already dollar cost averaging into your super fund each payroll cycle — you’re already using DCA for your superannuation without thinking about it.
Practical DCA Tips
- Invest on payday: Automate the transfer before money sits in a current account where it might be spent
- Don’t increase frequency: Monthly DCA is sufficient — daily or weekly DCA adds brokerage cost without meaningfully improving outcomes
- Stick to the plan during downturns: DCA is most powerful when you continue buying during market falls — the lower prices mean you accumulate more units at better prices
- Don’t pause when markets fall: This is when DCA delivers its greatest benefit — it takes real discipline to continue, but it is mathematically correct
Related Articles
- Lump Sum vs DCA Australia
- Portfolio Construction Australia
- Start Investing with $100/Month Australia
- Portfolio Rebalancing Australia
- Portfolio hub
Frequently Asked Questions
Is dollar cost averaging better than lump sum investing in Australia? Mathematically, lump sum investing outperforms DCA in rising markets (which is most of the time) because all capital is invested sooner. However, DCA significantly reduces the risk of poor market timing and is the practical default for most salary investors. For one-off windfalls, consider a hybrid: invest 50% as a lump sum immediately and DCA the rest over 6–12 months.
How much should I invest each month in Australia? Any amount you can invest consistently is better than a theoretically optimal amount you invest sporadically. Even $100/month invested consistently compounds significantly over 20–30 years. Increase the amount when your income grows — even small annual increases have a large compounding impact.
Does DCA work in a bear market? DCA is actually most advantageous in bear markets — you buy more units at lower prices during the downturn, which increases your return when markets recover. The discipline to continue investing during a bear market is the hardest part of DCA — but also the most rewarding.
This article provides general financial information only. For advice tailored to your situation, speak with a licensed financial adviser through the ASIC financial advisers register or MoneySmart.