The right answer depends on the path, not the slogan
“Time in the market beats timing the market” is usually true — but DCA earns its keep exactly when the market falls after you commit. This tool lets you test both on a specific price path instead of arguing in the abstract. Build a full DCA schedule on the DCA calculator.
Lump sum wins more often than people think
Vanguard studied this across global markets: lump sum investing outperforms DCA about two-thirds of the time over 12-month windows. The reason is simple — markets go up more than they go down, so keeping money in cash waiting for dips has a cost. Being out of the market is a position too.
DCA wins when you time it perfectly into a sustained bear market — monthly buys during a 40% drawdown produce much lower average entries than a lump sum at the top. The problem is you can't know you're at the top when you're there.
In practice for most people: lump sum if you have conviction and a long horizon, DCA if you're investing regular income (you have no choice), or DCA if the volatility of lump-sum timing would cause you to panic-sell on drawdowns. Psychological fit matters more than the math difference in most real portfolios.
Related: DCA calculator, profit goal planner, CAGR calculator.