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Dollar Cost Averaging vs lump sum comparison.
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Dollar-Cost Average models investing a fixed amount at regular intervals, showing how your average cost and position build over time, the maths behind monthly fund investing, SIPs, and automated retirement contributions.
The mechanism is elegant: a fixed sum buys more units when prices are low and fewer when high, so your purchases weight toward cheaper prices and your average cost comes out below the simple average of the prices. That smoothing is a genuine, demonstrable benefit, and it removes the pressure of trying to time the market.
It's worth being clear-eyed about DCA versus lump-sum. On pure average returns, lump-sum investing usually wins, because markets trend up and money invested sooner compounds longer. DCA's edge is behavioural and risk-related, it cuts the regret and timing risk of deploying everything just before a fall, and it naturally fits anyone investing from regular income rather than a windfall.
DCA manages timing risk but not market risk: a sustained decline still loses money, so it suits broad, long-horizon, growth-oriented investing. It's a strategy, not a guarantee, and this is informational, not financial advice. Everything runs in your browser. Pair it with the SIP and Compound Interest calculators.
| Price | Free, no signup, no paywall, no watermark |
|---|---|
| Works on | Any modern browser: desktop, tablet, and mobile |
| Processing | In your browser, files never leave your device |
| Account required | None |
| Category | Business Tools |
Enter your regular investment amount and interval
Provide the prices across periods (or assumptions)
See your average cost, total invested, and units accumulated
Compare scenarios to understand DCA's effect
Models dollar-cost averaging, investing a fixed amount at regular intervals
Shows your average cost and total position over time
Illustrates how regular investing smooths out price swings
Compares against lump-sum scenarios conceptually
Runs in your browser, your figures stay on your device
Free, with no signup and no limit on calculations
Modelling a regular investment plan (e.g. monthly into a fund)
Seeing your average cost across periodic buys
Understanding how DCA reduces timing risk
Planning a disciplined, recurring investment habit
DCA's real value is behavioural, it removes timing stress and suits investing from regular income
Your average cost ends up below the average price because fixed amounts buy more units when cheap
Lump-sum often wins on pure returns; choose DCA for discipline and risk management, not max return
Common questions about this tool, its workflow, and what to expect before you use it.
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