Personal finance
The cost of waiting to invest
The most expensive investing mistake is a late start, not a bad pick. See what a few years' delay quietly costs by the time you need the money.
Your investing plan
The cost of waiting
Enter your monthly amount and how long you'd wait, then press Calculate.
Compounding rewards time more than amount. The dollars you invest earliest have the longest to grow, so delaying even a few years can cost more than all the contributions you skipped, because you lose the growth those early dollars would have thrown off for decades.
Worked example
Investing $500/month at 7%, with 30 years until you need it, starting now versus waiting 5 years:
| Scenario | Ends with |
|---|---|
| Start now (30 years) | $609,985 |
| Wait 5 years (25 years) | $405,036 |
| Cost of the 5-year delay | $204,950 |
| Extra contributions from starting now | $30,000 |
Waiting five years costs $204,950, far more than the $30,000 of extra contributions those five years would have added. The gap is lost compounding: the early dollars had the longest runway, and you gave it up.
Questions
Why is the cost bigger than the missed contributions?
Because the dollars you skip early are the ones that would have compounded the longest. Five years of $500/month is $30,000 of contributions, but the growth those dollars would have earned over the full horizon is worth much more.
Is it ever too late to start?
No, the cost of waiting is exactly why the best time to start is now rather than later still. A shorter runway means less compounding, but every year you delay only makes the next start more expensive.
Related tools
- FIRE calculator how the head start shortens your timeline
- Self-employed retirement tax-advantaged places to start
- Net worth track the result
Assumes a steady annual return, which markets do not deliver smoothly. An illustration, not a promise. Not financial advice.