Dollar Cost Averaging Calculator – Investment Strategy | SoCalSolver
Calculate DCA returns, average cost per share, and portfolio value. Compare lump sum vs. dollar-cost averaging investing strategy with transaction fees.
- Page updated:
- Nov 29, 2025
- Tool version:
- v2.1.1
Overview
Dollar-cost averaging (DCA) is an investment strategy where you invest a fixed amount of money at regular intervals, regardless of the asset's price. Instead of trying to time the market by investing a lump sum at the 'perfect' moment, DCA spreads your investment risk over time by buying more shares when prices are low and fewer shares when prices are high. This calculator quantifies expected outcomes for DCA vs. lump sum, including the effects of transaction fees and dividend yields.
Use this tool for realistic scenarios—401(k) contributions, automated ETF/stock purchases, or regular crypto buys. It provides concrete outputs: shares acquired, average cost per share (cost basis), unrealized gains/losses, dividend totals, and a side-by-side comparison with a lump-sum investment made on day one.
Results
Annual Transaction Fees
$0.00
Total Investment Months
120
Monthly Transaction Fee
$0.00
Total Amount Invested
$60,000.00
DCA: Average Cost Per Share
$146.93
DCA: Total Shares Acquired
408.3499
DCA: Portfolio Value (at Current Price)
$49,001.99
DCA: Total Dividends Earned
$0.00
DCA: Total Return (Gain/Loss)
-$10,998.01
DCA: Total Return %
-18.33%
DCA: Annualized Return %
-2.00%
Lump Sum: Total Shares (If Invested at Start)
600
Lump Sum: Portfolio Value
$72,000.00
Lump Sum: Total Dividends
$0.00
Lump Sum: Total Return (Gain/Loss)
$12,000.00
Lump Sum: Total Return %
20.00%
Strategy: DCA vs Lump Sum Advantage
Lump Sum Wins
Strategy: Return Difference
-$22,998.01
DCA: Monthly Investment Required
$500.00
DCA: Average Share Price Paid
$146.93
Asset Price at End of Period
$120.00
Total Price Change (Start to End)
$20.00
Total Price Change %
20.00%
DCA: Cost Basis Per Share
$146.93
DCA: Unrealized Gain/Loss Per Share
-$26.93
DCA: Break-Even Price Per Share
$146.93
Final Portfolio Value (DCA + Dividends)
$49,001.99
Total Shares Acquired (DCA Method)
408.3499
How to read the result
- What it means
- The displayed value is an estimate based on your inputs. It represents the calculated scenario under current assumptions, not a guaranteed amount.
- Calculation limits
- The model uses simplified formulas and cannot account for all variables in your specific case (local regulations, personal conditions, temporal changes).
- Next step
- Use the result as a starting point. Adjust parameters to compare scenarios and validate with a professional when needed.
Related calculators
Useful links
Worked examples
Example 1: Moderate Stock Market Growth (10-Year S&P 500 DCA)
Scenario: You invest $500/month in an S&P 500 ETF (starting price $300, growing at 8% annually) over 10 years with no transaction fees.
Frequently asked questions
Why does lump sum win in rising markets but DCA win in falling markets?
In a rising market, having all your money invested from day one means your entire portfolio grows. With DCA, you're holding cash for months, which earns zero returns—an opportunity cost. In a falling market, DCA lets you buy more shares as prices decline, lowering your average cost basis.
Quality & oversight
- Author
- Ugo Candido, MBA
- Maintained by
- Ugo Candido, MBA
- Page updated
- Nov 29, 2025
- Tool version
- v2.1.1