Milestone planning page
How Long Does It Take to Reach $500,000?
This is one of the most practical compound interest questions because it flips the usual calculator logic. Instead of asking what a balance becomes, it asks how much time your plan needs.
Example timelines at 7%
| Starting balance | Monthly addition | Approximate time |
|---|---|---|
| $10,000 | $300 | About 31 years |
| $10,000 | $500 | About 26 years |
| $50,000 | $500 | About 18 years |
| $100,000 | $500 | About 18 years |
How to use this question well
Time-based goals are helpful because they make trade-offs clearer. If the timeline is too long, you know you need to change the starting amount, the monthly contribution, or the expected return assumption.