Savings & investing calculator

Investment growth calculator

Project your portfolio's future value — and see exactly how much fees quietly cost you.

Factors in investment fees Shows the cost of fees No signup required
Enter your numbers Savings · 2026
Projected portfolio value
$0
after 30 years
✓ Compounding builds real wealth
Total contributed
Investment growth
Lost to fees

How to read your results

This projects a portfolio's value using your expected annual return, reduced by the annual fee you pay (fund expense ratios and advisor fees). The fee field matters more than most people realize — it compounds against you every single year, just like returns compound in your favor.

The "lost to fees" figure shows the cumulative drag of that fee over the full period. On a 30-year horizon, even a seemingly small 1% fee can consume a six-figure chunk of your final balance.

Fees are the silent portfolio killer. The difference between a 0.05% index fund and a 1% actively managed fund doesn't sound like much, but over 30 years it can cost you 20–25% of your final balance. This is why low-cost index funds are the default recommendation of most independent financial experts — you keep more of your own returns.

What this calculator doesn't include

  • Market volatility and sequence risk — real returns vary year to year. A constant rate is a useful average but actual results will be bumpier, which matters most near retirement.
  • Taxes — returns in a taxable brokerage account are taxed on dividends and capital gains; tax-advantaged accounts (401k, IRA, Roth) shelter that growth.
  • Inflation — these are nominal dollars. A common approach is to subtract ~2.5–3% from your return assumption to estimate real, inflation-adjusted growth.
  • Contribution increases — most people raise contributions as income grows; this assumes a flat monthly amount.

What return rate should you use?

Historically, a diversified US stock portfolio has returned roughly 7% per year after inflation (about 10% before). Many planners use 6–8% for long-term stock-heavy projections and lower figures for bond-heavy or shorter-horizon portfolios. Using a conservative number means reality is more likely to pleasantly surprise you than disappoint.