Compound calculator

See how your money can grow with regular contributions and annual compounding. 10% is market-like. 15% is somewhat good. 20% is the competent-investor range.

Negative for withdrawals

Low and high around the base rate

Low projection
$450,782

5.0% assumed

  • Total contributions $300,000
  • Interest earned $150,782
Base projection
$697,222

10.0% assumed

  • Total contributions $300,000
  • Interest earned $397,222
High projection
$1,100,559

15.0% assumed

  • Total contributions $300,000
  • Interest earned $800,559

Run these three scenarios

1. Your current reality. Enter actual portfolio size, contribution, and time.

2. Your current reality plus more capital. Raise the monthly contribution and see what changes.

3. Your current reality plus better competence. Keep the contribution the same and raise the return assumption.

A few extra points of return do not sound like much. Over ten or fifteen years they can mean hundreds of thousands of dollars.