Calculator

Lump sum vs dollar-cost averaging

Putting the whole amount in at once usually finishes ahead of spreading it over months, because every dollar is in the market from day one. This calculator compares the two paths so you can see the gap for your amount, your spread and your expected return.

$
%

Results are pre-tax projections that assume a steady average return each month. Real markets go up and down, so the gap shown is the smooth-average picture, not a guarantee. Fees, inflation and taxes are not included.

Lump sum wins by
—
over dollar-cost averaging
Lump sum value
—
Dollar-cost avg value
—
Difference
—
What this means

When the market trends up over the full period, the lump sum generally comes out ahead because every dollar is invested from the start. But dollar-cost averaging is still worth it for many people: it reduces the risk of committing everything right before a dip and suits investors who do not have the cash sitting ready all at once. The best strategy is the one you actually follow. For money you need soon, the horizon matters far more than the timing.

How the return changes the gap
ScenarioReturnLump sumDollar-cost avgWinner
Common questions

Lump sum vs DCA questions, answered

Does lump sum or dollar-cost averaging usually win?

In a market that trends up over the full period, the lump sum usually comes out ahead, because all of the money is invested from day one and compounds for longer. That is what the headline on this page reflects. But smooth-average returns only exist on a calculator; in real markets the outcome depends on when the ups and downs land, and a lump sum invested just before a downturn can look worse than spreading it out.

Why would anyone dollar-cost average then?

DCA reduces the blast from investing the whole amount right before a dip, and it helps people who have a regular income rather than a pile of cash sitting ready. It also removes the stress of picking a day and committing a large sum at once. The real trade-off is that you give up a little expected return (money in the market longer) for smoother, easier-to-stomach entries. For most people the best strategy is the one they can actually stick to.

Is dollar-cost averaging the same as investing regularly?

Not quite. Dollar-cost averaging is deliberately spreading one chunk of money over a schedule, deciding now to dribble a lump sum in. Investing regularly means making ongoing contributions from your income as it arrives. Same mechanics, a different reason. Regularly investing a little as you earn is a habit almost everyone would benefit from; DCA is a choice about a single sum you already have.

Should I DCA a lump sum like an inheritance or bonus?

If you have the cash now, a long horizon and you can handle seeing it fall shortly after investing, the historical pattern favours putting it in promptly, which is effectively the lump sum. DCA a windfall mainly makes sense when you want to soften the psychological blow of investing it all at once, or when you are not fully confident you will not need the money soon. Either way, make sure the money is not needed in the near term, because the horizon matters more than the timing.