Dollar-cost averaging into crypto: how it works and what it costs
Buying a fixed amount on a schedule takes the guesswork out of timing. Here is what DCA does, what it doesn't, and how to keep fees low.
Dollar-cost averaging (DCA) means investing the same dollar amount at regular intervals, for example $100 every two weeks, regardless of price. It's one of the most common ways people build a crypto position.
How it works
Because the dollar amount stays fixed, you automatically buy more coins when the price is low and fewer when it's high. Here's a simple example with four $100 purchases:
| Purchase | Price | Coins bought |
|---|---|---|
| 1 | $100 | 1.00 |
| 2 | $80 | 1.25 |
| 3 | $50 | 2.00 |
| 4 | $90 | 1.11 |
You spent $400 and own 5.36 coins, an average cost of about $74.60, lower than the simple average of the four prices ($80). At the final price of $90, you're ahead even though the price never got back to where you started.
What DCA does and doesn't do
- It does remove the pressure of picking the right day, and it builds a habit.
- It does smooth out the effect of short-term swings on your average cost.
- It doesn't guarantee a profit. If a coin declines steadily, DCA loses money too.
- It doesn't beat investing a lump sum when prices mostly rise. Studies of stock markets find a lump sum invested on day one usually ends ahead; DCA trades some expected return for less regret and less timing risk.
Our DCA backtest runs both approaches on real price history so you can see the difference for yourself.
Watch the fees on small, frequent buys
DCA means many small purchases, and small purchases often carry the highest fees. A flat $0.99 fee on a $25 purchase is nearly 4%. Before you set up a schedule:
- Check what your platform charges on recurring buys at your amount, using the buying-cost calculator.
- Consider fewer, larger purchases (monthly instead of weekly) if fees are flat.
- Look for platforms with cheap recurring plans. Cash App's Auto Invest for bitcoin, for example, has no fee or spread.
Setting it up
- Choose an amount you can keep investing even if prices fall for a year.
- Pick a schedule that matches your paycheck.
- Fund by bank transfer, not card.
- Keep records: each recurring buy is a separate purchase with its own cost basis.
- Review once or twice a year, not every day.
This guide is for general education and isn't financial, investment, legal or tax advice. Crypto is volatile and you can lose money. Facts were checked as of the update date above; rules and fees change.