Daily Habit Investment Replay

Convert a daily habit expense into an educational investing replay using historical data. Choose amount, frequency, asset, and horizon to see how regular contributions may have evolved.

The static snapshot below uses sample values so you can understand the result format before running your own inputs.

Example snapshot

Inputs: $5 daily, S&P 500 proxy, 15 years, inflation adjustment on.

Example output: contributed about $27,375, hypothetical ending value about $46,900.

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The real cost of daily habits

Small daily expenses rarely feel significant in the moment. A $5 morning coffee, a $12 lunch, a $3 streaming subscription - these feel trivial individually. But compounded over years, the opportunity cost is surprisingly large.

This calculator applies dollar-cost averaging (DCA) - the strategy of investing a fixed amount on a regular schedule regardless of market conditions. Instead of timing the market, you buy more shares when prices are low and fewer when prices are high, naturally smoothing your average purchase price over time.

How the calculation works

For each trading day in the selected period, the calculator divides your daily amount by the S&P 500 price to determine how many shares (or fractional shares) you would have purchased. Weekend and holiday contributions are rolled forward to the next market open. At the end of the period, your total shares are multiplied by the latest price to get today's portfolio value.

Disclaimer

This tool is an educational estimate only. Past performance of the S&P 500 does not guarantee future results. The simulation does not account for taxes, brokerage fees, dividend reinvestment, or inflation (unless the toggle is enabled). This is not financial advice - please consult a qualified financial advisor before making investment decisions.