Research
DCA vs lump sum: what the data says
If you have money to invest, is it better to put it all in at once or spread it out? We tested $100 a month of dollar-cost averaging against investing the same total on day one, from every possible start month, for Bitcoin, Ethereum, the S&P 500 and gold.
Key findings
- Across every asset and holding period tested, DCA ended ahead of a same-budget lump sum in 25.3% of start dates. The lump sum won the other 74.7%.
- DCA did best against a lump sum for Gold over 1 year, ending ahead in 36.8% of start dates. It did worst for Bitcoin over 5 years, ending ahead in just 7.4%.
- Where DCA helped most was the worst case: for Bitcoin over 5 years, the worst start date returned +15.7% as a lump sum but +42.7% with DCA.
Updated with prices through 21 October 2026.
Held for 1 year
| Asset | DCA beat lump sum | Median return (DCA / lump) | Worst start (DCA / lump) | Start months tested |
|---|---|---|---|---|
 Bitcoin | 30.6% | +44.4% / +93.9% | -50.4% / -76.0% | 183 |
 Ethereum | 31.1% | +21.9% / +45.9% | -66.4% / -89.6% | 122 |
 S&P 500 (Total Return) | 24.2% | +6.6% / +13.3% | -33.7% / -43.6% | 310 |
 Gold | 36.8% | +2.8% / +7.4% | -21.7% / -27.3% | 190 |
Held for 3 years
| Asset | DCA beat lump sum | Median return (DCA / lump) | Worst start (DCA / lump) | Start months tested |
|---|---|---|---|---|
| Bitcoin | 20.8% | +191.6% / +443.8% | -9.5% / -25.1% | 159 |
| Ethereum | 28.6% | +90.8% / +302.2% | -34.6% / -44.6% | 98 |
| S&P 500 (Total Return) | 21.7% | +19.3% / +38.4% | -40.0% / -40.2% | 286 |
| Gold | 32.5% | +7.7% / +13.6% | -21.1% / -37.7% | 166 |
Held for 5 years
| Asset | DCA beat lump sum | Median return (DCA / lump) | Worst start (DCA / lump) | Start months tested |
|---|---|---|---|---|
| Bitcoin | 7.4% | +800.7% / +2613.7% | +42.7% / +15.7% | 135 |
| Ethereum | 20.3% | +390.1% / +1099.7% | -28.4% / -35.9% | 74 |
| S&P 500 (Total Return) | 20.6% | +34.7% / +72.3% | -36.9% / -29.7% | 262 |
| Gold | 31.0% | +19.0% / +37.3% | -23.1% / -32.9% | 142 |
How we tested it
For each month the asset has price data, we start a plan that buys $100 every month for the holding period. A lump sum invests the same total on the first day. Both are valued at the end of the period in US dollars, using daily closing prices, with no fees. The S&P 500 figures are total return (dividends reinvested); gold uses COMEX front-month futures. “Return” is the total gain over the money invested.
Neighbouring start months overlap and share most of their history, so these are not independent results: treat them as a feel for the range, not as that many separate bets. Bitcoin and Ethereum have short histories dominated by a few large cycles, so their numbers say more about those cycles than about the future.
Frequently asked questions
- Is dollar-cost averaging better than a lump sum?
- Not on average. When prices trend upward over time, money invested earlier has longer to grow, so a lump sum usually ends ahead. DCA tends to come out ahead when the market falls or goes sideways after you start. The tables above show how often each happened.
- Why use DCA if a lump sum usually wins?
- Because it removes the timing decision and softens the worst case. Most people don't have a lump sum to invest at once and are adding money from income anyway, and DCA limits how badly a single badly timed purchase can hurt.
- How is a fair comparison made?
- For each start month, the DCA plan buys a fixed amount every month for the holding period. The lump sum invests the same total on the first day. Both are valued at the end of the period, so they compare like for like.