What Age Should You Start Investing?
There's no minimum age to benefit from compounding — only a maximum cost to waiting. See how starting at 25 versus 35 can nearly double your final balance on the same contributions.
Don't have time? Here's what you need to know:
- 1There's no minimum age to benefit from compounding — start as soon as you have a cushion and no high-interest debt.
- 2Starting at 25 versus 35 on the same monthly contribution can leave you with roughly double at retirement.
- 3Teens with earned income can use a custodial Roth IRA for a tax-free, decades-long head start.
- 4Starting late isn't hopeless — lean on a higher savings rate and post-50 catch-up contributions, but start now.
As Early as You Reasonably Can
The honest answer to "what age should I start investing?" is: as soon as you have money you won't need for years and a basic financial footing under you. There is no magic age. A teenager with earned income can invest through a custodial account; a 22-year-old with a first paycheck can start with their employer's retirement plan. The single most valuable input you bring to investing is not income or skill — it is time, and time only runs one direction.
That said, "start early" comes with a sequence. Investing works best once you have a small emergency cushion and aren't carrying high-interest debt like credit-card balances, which compound against you faster than investments compound for you. Clear those first, then start — and once you do, the earlier the better, by a wide margin.
The Real Cost of Waiting a Decade
Compounding rewards time more than amount, and the gap is startling. Consider two people who each invest $300 a month and earn a long-run average return in the rough neighborhood of historical stock returns. The one who starts at 25 and the one who starts at 35 contribute for the same kind of career, but the early starter ends up with dramatically more — often close to double — purely because their first contributions had an extra decade to compound.
This is why a dollar invested in your twenties is worth far more at retirement than a dollar invested in your forties. The early contributions do the heaviest work because they spend the longest time growing. You can run your own numbers with our ETF return calculator to see how shifting your start date changes the finish line.
| Start age | Monthly contribution | Years invested to 65 | Relative outcome |
|---|---|---|---|
| 25 | $300 | 40 years | Largest — full compounding runway |
| 35 | $300 | 30 years | Often roughly half the 25-year-old's balance |
| 45 | $300 | 20 years | Far smaller; must save much more to catch up |
Tip: Use the calculator to compare your own start dates. Seeing the cost of a ten-year delay in real numbers is the best motivation to begin now.
Starting in Your Teens and Twenties
Minors can't open a brokerage account on their own, but a parent or guardian can open a custodial account, and a teen with earned income can even contribute to a custodial Roth IRA — an extraordinarily powerful head start, because decades of growth then come out tax-free in retirement. For young adults, the priority order is usually: capture any employer 401(k) match (free money), then fund a Roth IRA, then invest in a taxable account.
You don't need much to begin. Fractional shares let you start a broad fund like VTI or VOO with a few dollars, and automatic monthly contributions build the habit that matters more than the initial sum. Starting small and early beats starting big and late nearly every time.
Want the full framework? This 2-hour ETF course teaches you exactly how to pick, buy, and hold profitable ETFs — from zero to confident investor. Under $15.
What If You're Starting Late?
If you're reading this in your forties, fifties, or later, the lesson is not to despair — it's to start now rather than waiting any longer. The best time to begin was years ago; the second-best is this month. A later start simply means leaning harder on the levers you still control: a higher savings rate, catch-up contributions that tax-advantaged accounts allow once you pass 50, and keeping costs low so more of your return stays invested.
Time is the most powerful factor, but it is not the only one. A disciplined saver who starts later and contributes aggressively can still build substantial wealth — just with a larger monthly commitment than the early starter needed. The mistake at any age is continuing to wait, because every year of delay is a year of compounding you can never get back.
Important: Don't let a late start become an excuse to keep waiting. The cost of delay only grows; starting today is always better than starting next year.
Frequently Asked Questions
What is the best age to start investing?
As early as you reasonably can, once you have a small emergency fund and no high-interest debt. There is no minimum age to benefit from compounding — teens with earned income can invest through custodial accounts. Because time is the most powerful factor in growing wealth, starting in your teens or twenties has an enormous advantage over starting later.
How much does waiting 10 years really cost?
A great deal. Someone who starts investing at 25 instead of 35, contributing the same amount each month, often ends up with close to double the balance at retirement — purely because the early contributions had an extra decade to compound. The cost of delay isn't the contributions you miss; it's the years of growth on them.
Can a teenager start investing?
Yes, with help. A minor can't open a brokerage account alone, but a parent or guardian can open a custodial account on their behalf. A teen with earned income can even contribute to a custodial Roth IRA, which is one of the most powerful head starts available because the growth comes out tax-free in retirement decades later.
Is it too late to start investing in my 40s or 50s?
No. A later start means relying more on a higher savings rate and catch-up contributions, which tax-advantaged accounts allow after age 50, rather than on decades of compounding. You'll need to contribute more to reach the same goal, but a disciplined late starter can still build meaningful wealth. The worst choice is to keep waiting.
Further Reading
Free Tools
Alex Harrington
CFA Level II Candidate, Finance & Economics
Alex Harrington is an independent ETF researcher and personal finance writer with over 8 years of experience analyzing exchange-traded funds. A CFA Level II candidate with a background in economics, Alex has reviewed 800+ ETFs and helped thousands of beginners build their first investment portfolios through clear, jargon-free education.
This content is for educational purposes only and does not constitute financial advice. Past performance does not guarantee future results. Consult a licensed financial advisor before making investment decisions.