Dollar Cost Averaging Calculator

This dollar cost averaging calculator estimates how regular investments could grow when you add money on a fixed schedule. It is built for recurring contributions rather than one-off lump-sum growth.

Enter an initial investment, regular contribution, contribution frequency, investment period, and expected annual return. The calculator shows final value, total invested, estimated investment growth, a year-by-year table, and a simple portfolio growth chart.

Dollar cost averaging means investing fixed amounts on a regular schedule rather than trying to time the market. The calculator does not use historical market data or pick investments for you; it applies the annual return assumption you enter.

If you invest GBP 300 every month for 10 years, you contribute GBP 36,000 before investment growth. If the investment grows over time, the final value may be higher because each monthly contribution has time to compound.

During market dips, the same GBP 300 buys more units. During market highs, it buys fewer. That does not remove investment risk, but it can reduce the pressure to choose the perfect entry point.

Dollar cost averaging can make investing more repeatable and less emotional. It is especially useful for people investing from monthly income rather than a one-off lump sum.

It does not guarantee a profit or protect against loss. The result still depends on the assets chosen, contribution discipline, fees, taxes, inflation, and market performance.

The calculator assumes the same contribution amount and frequency throughout the projection.

The expected annual return is an assumption, not a market forecast. Try lower and higher return rates to see how sensitive the final value is.

Weekly, monthly, and yearly contributions enter the projection at different times, so contribution frequency can change the final balance.

Fees, tax, inflation, and actual market volatility are outside this projection, so keep a margin when using the result for planning.

Treating the expected return as guaranteed.

Changing contribution frequency in one scenario but not another, then comparing the results as if the inputs were equal.

Ignoring platform fees, fund charges, taxes, or inflation when judging the real-world outcome.

Use investment when you need target-contribution, lump-sum, or years-needed modes.

Use compound interest when the question is one starting principal with a compounding frequency, not recurring deposits.

Use savings when the goal is a cash savings target rather than investment-market assumptions.

Rerun the projection when your contribution amount, contribution frequency, time horizon, or return assumption changes.

Review the plan after income changes, fee changes, or a goal shift that changes how much you can invest regularly.

Keep a note of whether the result is a nominal projection, because this calculator does not adjust the final value for inflation.

Pick a fixed contribution day and amount you can maintain through market dips — consistency matters more than perfect timing. Automate the transfer where possible so the plan survives busy months.

Review annually, not weekly: check fees, allocation drift, and whether the contribution still fits income — not whether the last month was red or green on the chart.

Pair DCA totals with compound interest calculator using a conservative return range to see how small regular amounts stack over 10–20 years.

If you pause contributions during volatility, model the missed months explicitly — gaps early in a long horizon can matter as much as a slightly lower average return.

Write down in advance what you will do when the market falls 20% — stick to the contribution plan unless income or goals change, not because headlines feel scary.

Avoid doubling contributions only after strong rallies; that pattern often buys more at highs and pauses at lows.

Keep a separate cash buffer so you never pause investing because an emergency drained the same account.