Simulate dollar-cost averaging into any stock, ETF, or index — explore what happened historically or project where you could go.
What if I had invested?
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Past performance does not guarantee future results. These simulations use historical average annual returns and compound monthly growth — they do not account for taxes, brokerage fees, inflation, dividends reinvested, or real price volatility. Projected returns are estimates only. This calculator is for educational purposes and is not financial advice. Always consult a qualified advisor before investing.
Dollar cost averaging (DCA) is an investment strategy where you invest a fixed amount of money at regular intervals — regardless of what the market is doing. Instead of trying to time the perfect entry point, you buy consistently every week, every two weeks, or every month. When prices are high, your fixed amount buys fewer shares. When prices drop, the same amount buys more shares. Over time, this smooths out your average cost per share and removes the emotional guesswork from investing.
DCA is one of the most popular strategies among long-term investors because it works with any budget. Whether you're investing $50 a month or $5,000, the principle is the same: consistency beats timing. Studies have shown that even professional fund managers struggle to consistently time the market, which is exactly why DCA appeals to everyday investors who want to build wealth without staring at charts all day.
Our dollar cost averaging calculator has two modes. In Historical Backtest mode, you pick a real stock or ETF, set a monthly contribution, choose a start date, and see exactly what your portfolio would be worth today using real monthly closing prices. In Future Projection mode, the calculator uses the asset's historical average annual return (or a custom rate you set) to project your portfolio value over 1 to 40 years, including conservative and optimistic scenarios.
Say you started investing $200 per month into the S&P 500 (SPY) five years ago. Using the backtest mode with real prices, you'd see that your total contributions of $12,000 grew to roughly $15,800 — a gain of about $3,800 or 31.7%. Now imagine running the projection mode for 20 years at the S&P 500's historical average of ~10% per year. That same $200/month could grow to over $150,000, even though you only contributed $48,000 out of pocket. That's the power of compound growth combined with consistency.
Want to see how DCA compares to investing a lump sum all at once? Check out our article on lump sum investing in the S&P 500 for a deeper comparison.
It depends on your situation. Historically, lump sum investing has outperformed DCA about two-thirds of the time because markets tend to go up over the long run. However, DCA significantly reduces the risk of investing a large sum right before a market crash. For most people who invest from each paycheck, DCA isn't just a strategy — it's the natural way to invest. If you have a lump sum to invest and the market makes you nervous, DCA over 6–12 months is a reasonable middle ground. Read more in our lump sum vs. DCA breakdown.
Monthly is the most common frequency, but biweekly or even weekly works too. The key is consistency, not frequency. Investing every paycheck is the easiest approach because it automates the habit. The difference between weekly and monthly DCA over 10+ years is marginal — what matters most is that you keep investing and don't skip months when the market drops.
Bear markets are actually where DCA shines the most. When prices are falling, your fixed monthly investment buys more shares at lower prices. When the market eventually recovers — and historically it always has — those extra shares purchased at a discount amplify your returns. Investors who kept DCA'ing through the 2008 crash or the 2020 COVID drop saw some of their best long-term returns from shares purchased during those downturns.
There's no magic number — the best amount is whatever you can invest consistently without affecting your emergency fund or essential expenses. Even $100 a month adds up significantly over time thanks to compound growth. A good rule of thumb is to invest 10–20% of your after-tax income, but starting with any amount is better than waiting until you can afford more.
Broad market index funds like the S&P 500 (SPY, VOO) or total market funds (VTI) are the most popular choices for DCA because they provide instant diversification across hundreds of companies. Dividend ETFs like SCHD are another solid option if you want income along with growth. Individual stocks can work too, but they carry more risk since a single company can underperform for years. For most investors, a simple 2–3 fund portfolio is the best foundation for a DCA strategy.
Ready to put DCA into practice? Use the calculator above to backtest your favorite assets, then head to our brokerage setup guide to open an account and start investing.