DCA (Dollar-Cost Averaging) invests a fixed amount on a fixed schedule. €200/month for 30 years at 7% APR = €245,417 final (€72,000 invested, €173,417 from growth).
DCA smooths timing risk — you buy more shares when prices drop, fewer when they rise. Lump-sum investing wins ~67% of the time historically (Vanguard 2012 study) because markets trend up, but DCA reduces volatility of outcomes — useful for behavioural discipline.
| Year | DCA Invested | DCA Balance | Lump Sum | Diff |
|---|---|---|---|---|
| Year 1 | $6,000 | $6,283 | $33,141 | -26,858 |
| Year 2 | $12,000 | $13,223 | $36,612 | -23,389 |
| Year 3 | $18,000 | $20,891 | $40,445 | -19,554 |
| Year 4 | $24,000 | $29,361 | $44,681 | -15,320 |
| Year 5 | $30,000 | $38,719 | $49,359 | -10,640 |
DCA invests a fixed amount at regular intervals, buying more when prices are low and less when high. It reduces timing risk.
Lump Sum invests everything immediately. In a consistently rising market, lump sum typically outperforms because money is invested longer.
Note: This simulation assumes constant returns. In real markets with volatility, DCA can outperform lump sum in bear or choppy markets.
Educational tool. Not financial advice. DCA outcomes depend on market path; historically lump-sum tends to beat DCA in rising markets and cushion drawdowns in falling ones.
DCA outcomes at 7% APR
| Contribution + horizon | Final value | Detail |
|---|---|---|
| €100/mo · 10y · 7% | €17,308 | €12,000 invested · €5,308 gain |
| €200/mo · 10y · 7% | €34,617 | €24,000 invested · €10,617 gain |
| €500/mo · 10y · 7% | €86,542 | €60,000 invested · €26,542 gain |
| €100/mo · 20y · 7% | €52,093 | €24,000 invested · €28,093 gain |
| €200/mo · 20y · 7% | €104,185 | €48,000 invested · €56,185 gain |
| €500/mo · 20y · 7% | €260,463 | €120,000 invested · €140,463 gain |
| €100/mo · 30y · 7% | €122,709 | €36,000 invested · €86,709 gain |
| €200/mo · 30y · 7% | €245,417 | €72,000 invested · €173,417 gain |
| €500/mo · 30y · 7% | €613,544 | €180,000 invested · €433,544 gain |
| €500/mo · 30y · 4% | €346,931 | Same input, lower APR |
| €500/mo · 30y · 10% | €1,131,997 | Same input, equities long-run |
| Lump €100k · 30y · 7% | €811,650 | No further contributions |
History & origin
The term 'dollar cost averaging' was popularised by Benjamin Graham in The Intelligent Investor (1949), though the underlying practice of regular fixed-amount purchases was already common among American investors in the 1920s–30s. Academic critique came from George Constantinides (1979), who showed DCA can underperform lump-sum investing on average — but most retail investors prefer DCA for its volatility-smoothing and behavioural benefits when entering a market with uncertain timing.
DCA vs Lump Sum Calculator
See how Dollar Cost Averaging compares to investing a lump sum. Adjust your investment amount, frequency, expected return, and time horizon. The chart overlays both strategies with a detailed comparison table.
How to compare DCA against lump sum
- Enter the total amount you have available to invest.
- Choose a frequency — weekly or monthly — for the DCA plan to spread that amount over time.
- Set the expected annual return; the same rate applies to both the DCA and the lump-sum scenario.
- Pick a time horizon and read the side-by-side chart plus the difference column to see which strategy comes out ahead under your assumptions.
Common use cases
- Deciding whether to deploy a year-end bonus all at once or split it across 12 months.
- Modeling how DCA cushions a market drawdown during the contribution period.
- Showing why historically — in steadily rising markets — lump-sum tends to outperform DCA on average.
- Setting an automatic monthly contribution and verifying its long-term trajectory.
About DCA
Dollar Cost Averaging (DCA) is an investment strategy where you invest a fixed amount at regular intervals regardless of market price. It reduces the impact of volatility and removes the need to time the market.
- DCA vs Lump Sum side-by-side comparison
- Weekly or monthly investment frequency
- Interactive dual-line chart with gradient fill
- Yearly or monthly comparison table with difference column
- Export chart as PNG or data as CSV
- All calculations in your browser
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Sources (2)
- Constantinides, G. M. (1979). A note on the suboptimality of dollar-cost averaging as an investment policy. Journal of Financial and Quantitative Analysis, 14(2), 443–450.
- Statman, M. (1995). A behavioral framework for dollar-cost averaging. Journal of Portfolio Management, 22(1), 70–78.
These are the original publications and regulations the formulas in this calculator are based on. Locate them by author and year on Google Scholar, SSRN, or the U.S. Government Publishing Office.
By Marco B. ·