Dollar Cost Averaging Calculator
About Dollar Cost Averaging Calculator
What Is Dollar Cost Averaging?
Dollar cost averaging (DCA) is an investment strategy where you invest a fixed amount at regular intervals regardless of market conditions. When prices are high, you buy fewer shares. When prices are low, you buy more. Over time, this naturally lowers your average cost per share compared to a lump-sum purchase at the wrong moment. DCA removes the emotion and guesswork from investing – you don’t need to time the market because you’re investing systematically.
How DCA Works
The average cost basis is calculated by dividing total dollars invested by total shares purchased: Average Cost = Total Invested / Total Shares. For example, investing $500 monthly when a stock fluctuates between $40 and $60 over 6 months yields more shares during cheap months and fewer during expensive months, resulting in an average cost below the simple average of prices.
How to Use This Calculator
Enter the amount you invest each period, the number of periods, and the price at each period. The calculator computes your total shares purchased, average cost per share, total invested, current portfolio value, and percentage return. You can add up to 24 periods to model two years of monthly investing.
Frequently Asked Questions
Is DCA better than lump sum investing?
Studies show that lump sum investing beats DCA about two-thirds of the time in rising markets because money is invested sooner. However, DCA significantly reduces the risk of investing everything at a market peak and is psychologically easier for most people.
How often should I invest?
Monthly is most common and aligns with pay cycles. Bi-weekly or weekly works too. The key is consistency, not frequency. Pick a schedule you can maintain long-term.
Does DCA guarantee a profit?
No. DCA reduces timing risk but does not eliminate market risk. If the investment declines over your entire holding period, you will still have a loss. DCA works best with assets that trend upward over the long term.
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