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Lump Sum vs Dollar Cost Averaging Calculator
Enter the total amount you want to invest, your expected return, and the DCA period to compare investing everything now versus spreading it out over monthly installments.
The Math Behind the Debate
The reason lump sum wins most of the time is simple: markets go up more often than they go down. If you DCA over 12 months, the last installment only gets 1 month of growth instead of 12. On average, you end up with ~6 months less market exposure. That said, DCA isn't about maximizing returns — it's about managing risk and behavior. If DCA keeps you from panic-selling or never investing at all, it's the right strategy for you regardless of what the math says.
Frequently Asked Questions
Which is better: lump sum or DCA?
Statistically, lump sum investing outperforms dollar cost averaging about two-thirds of the time, because markets trend upward long-term. A Vanguard study across US, UK, and Australian markets confirmed this. However, DCA reduces the risk of investing everything at a market peak.
When is DCA the better choice?
DCA makes sense when: (1) you're investing regular income as you earn it (most people), (2) the psychological comfort of not going all-in helps you actually invest instead of sitting in cash, or (3) you believe the market is currently overvalued.
What about investing an inheritance or bonus?
For a large windfall, research suggests investing it all immediately in a diversified portfolio. The longer money sits in cash 'waiting for a better entry', the more potential growth you miss. If the anxiety is too high, a 3-6 month DCA is a reasonable compromise.
