DCA Calculator
Model the long-term power of dollar-cost averaging. Choose an asset type for a suggested return rate, or enter a custom rate. Results update in real time.
Inputs
Final Balance (DCA)
$379,684
Total Earnings
$259,684
+216.4%
Total Invested
$120,000
Lump-Sum Equivalent
$879,369
Lump-sum wins
Annualized Return
5.93%
DCA vs Lump-Sum Growth
Smart Insights
Over 20 years of consistent investing, your 10% return generates a 216% total return on contributions.
Investing the full amount today would yield ~$499,685 more. DCA trades some upside for lower timing risk.
Automating $500/month removes emotion from investing and ensures you buy more shares when prices are low.
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How Dollar-Cost Averaging Works
Instead of trying to time the market, DCA investors commit to a fixed amount on a regular schedule. This means buying more shares when prices fall and fewer when prices rise — naturally lowering your average cost per share over time. It is the strategy behind 401(k) and employer-sponsored retirement plans.
Frequently Asked Questions
What is dollar-cost averaging (DCA)?
Dollar-cost averaging is an investment strategy where you invest a fixed amount at regular intervals (e.g., $500/month) regardless of market conditions. When prices are high you buy fewer shares; when prices are low you buy more — reducing the impact of volatility over time.
Is DCA better than lump-sum investing?
Research shows lump-sum investing outperforms DCA roughly two-thirds of the time in rising markets, because money invested earlier has more time to compound. However, DCA eliminates the stress of timing the market and is the most practical approach for investors with regular income.
What return rate should I use for stocks?
The S&P 500 has historically returned about 10% annually before inflation, or roughly 7% after inflation. For a conservative estimate use 6–7%; for an optimistic scenario use 10%. Crypto and individual stocks carry far higher risk and variance.
How does the initial lump sum work in this calculator?
The optional lump sum field lets you model a one-time investment made at the start of the period, on top of your monthly contributions. For example, you might invest an inheritance or bonus upfront and then continue with regular monthly contributions.
What does the lump-sum comparison show?
The comparison shows what would happen if you invested the exact same total amount (all monthly contributions combined) as a single lump sum on day one. This illustrates the time-value-of-money trade-off between DCA and lump-sum strategies.