Free tool

Investment Growth Calculator

See how a starting balance plus steady monthly contributions compounds over time. Runs entirely in your browser — nothing you enter is sent anywhere.

Your plan

The S&P 500's long-run average is often cited near 7% after inflation — your results will vary
Projected value
Fill in your plan and project

Guesses are fine — real numbers are better

Every projection depends on the return you assume, and most people pick a round number out of the air. The Investment Calculator inside Payd can do something this web version can't: with one opt-in checkbox, it fetches up to five years of price history for the tickers you actually hold, computes each holding's annualized return, weights them by position size, and bases the projection on that — with a per-ticker breakdown and a plain disclaimer that past performance doesn't guarantee future results.

Like everything in Payd, it works without a bank login: your holdings live on your phone, and the only thing that ever leaves it is the ticker symbol used to fetch prices.

Project with your real holdings

Payd's in-app calculator can base its projection on your portfolio's actual 5-year performance — computed on your phone, no account required.

Projections are estimates for planning only, not financial advice. Past performance does not guarantee future results.