Calculator
Dollar-Cost Averaging Calculator
What it calculates
Dollar-cost averaging (DCA) means investing a fixed amount on a regular schedule regardless of price. It removes the pressure of timing the market and smooths out your average entry price. This tool estimates the future value of a recurring contribution compounding at an assumed annual return.
How this dollar-cost averaging calculator works
The calculator treats each monthly investment as a separate contribution that compounds from the month it is added through the end of the selected period.
Formula
FV = C × [((1 + r/12)12t − 1) ÷ (r/12)]
Dollar-cost averaging can reduce timing pressure, but it does not prevent losses or guarantee that it will outperform investing a lump sum.
Primary specifications
Before you use the result
Assumptions
- • The same amount is invested at the end of every month.
- • The assumed annual return is applied evenly through the period.
- • It does not model actual market prices, fees, taxes, or a lump-sum alternative.
Quick start
- 1. Set the amount you can invest consistently each month.
- 2. Choose a long-term return assumption rather than a short-term prediction.
- 3. Compare several time horizons to see how consistency changes the result.
Inputs and units
| Input | Unit | Default |
|---|---|---|
| Monthly investment | US dollars per month | $500 |
| Annual return | percent per year, compounded monthly | 8% |
| Years | years | 20 |
Worked example (hypothetical)
Dollar-Cost Averaging Calculator: worked example
Hypothetical example using the calculator's default inputs. The numbers are illustrative, not a forecast.
| Monthly investment | $500 |
|---|---|
| Annual return | 8% |
| Years | 20 |
| Final value | $294,510 |
|---|---|
| Total invested | $120,000 |
| Gain | $174,510 |
Investing $120,000 in equal monthly amounts grows to about $294,510 at a steady 8% return.
How to interpret the result
The result assumes a constant return, so it shows the arithmetic of regular investing rather than the effect of buying at different prices. Real outcomes depend on the sequence of market returns, fees, and taxes.
Frequently asked questions
Is dollar-cost averaging better than investing a lump sum?
Lump-sum investing wins more often historically because markets tend to rise, so money is exposed sooner. But DCA reduces regret and risk if you invest as you earn, and it enforces discipline.
How often should I invest with DCA?
Any consistent interval works — weekly, biweekly, or monthly. Aligning contributions with your paycheck is the most sustainable approach.
Does DCA prevent investment losses?
No. Regular investing changes purchase timing but cannot prevent losses when the investment declines or fails.
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