Dollar Cost Averaging Calculator
Compare dollar cost averaging vs lump sum investing under your contribution schedule and assumed return rate. Useful for paycheck investing and reducing timing regret — illustrative math, not historical backtests.
Compare dollar cost averaging vs lump sum investing under your contribution schedule and return assumptions. Useful for paycheck investing, 401(k) habits, and reducing timing regret.
What is dollar cost averaging?
Dollar cost averaging (DCA) is investing a fixed amount at regular intervals regardless of market price. Instead of deploying $12,000 on one day, you might invest $1,000 per month for a year. You automatically buy more shares in dips and fewer at highs — smoothing your average purchase price and reducing “I bought the top” regret.
DCA vs lump sum: which is better?
In steadily rising markets, lump sum often ends ahead because capital compounds sooner. DCA shines when cash arrives over time (paychecks), when volatility makes you freeze, or when a full lump sum would keep you up at night. This calculator shows both outcomes under your assumed return — illustrative projections, not a backtest of real historical market paths.
How to use this free DCA calculator
- Enter contribution amount and frequency (or total capital for lump sum).
- Set years invested and expected annual return.
- Compare ending values, total invested, and gains.
- Stress-test with a lower return to see downside of each approach.
- Project decades of growth with the compound growth calculator.
Real-world DCA strategies
- 401(k) / IRA paycheck investing: Classic DCA — automatic and behavior-proof.
- Monthly brokerage transfers: Same amount into broad ETFs like SPY/VOO every month.
- DRIP: Reinvesting dividends is a form of ongoing averaging — model income with our dividend calculator.
- Hybrid: Invest available cash now, DCA future savings — often the practical middle path.
Common DCA mistakes
- Stopping contributions after a crash (the opposite of the plan).
- Assuming DCA “beats the market” — it manages timing, not alpha.
- Parking a lump sum in cash for years waiting for a perfect entry.
- Ignoring fees and taxes when comparing glossy projections.
Frequently asked questions
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Hypothetical projections only — not financial advice. Markets can decline for long periods. Past returns do not guarantee future results.
