What Waiting 5 Years to Invest Actually Costs You

"I'll start investing once I have more to put in" feels reasonable. The math usually disagrees, because time in the market matters more than the size of the contribution.

$200/month starting at age 25 vs. starting at age 30, both continuing to age 65 at a 7% average annual return — those five years alone create a six-figure gap in the final balance.

Why five years matters so much more than it seems

Compounding is heavily front-loaded in importance: money invested early has the maximum number of compounding cycles ahead of it. The contributions made in the first five years end up doing disproportionate work over a multi-decade horizon, even though they're a small fraction of the total dollars contributed.

"Bigger contribution later" doesn't fully make up for it

A common instinct is to plan on contributing more once income is higher, to make up for a late start. It helps, but it rarely fully closes the gap — because no later contribution gets the same number of compounding years as the money that started five years earlier. Time is the one input you can't buy back.

Run your own comparison

The exact size of the gap depends on your contribution amount, return assumption, and how many years you're comparing. The Investment Growth Calculator shows the full "start now vs. wait N years" comparison for your own numbers, including the dollar cost of every year of delay.