What Is the Ideal Age to Start Investing?
There’s a version of this question that gets asked at family dinners, in college dorm rooms, and increasingly in group chats where someone just got their first real paycheck. It sounds simple enough, like there should be a clean answer, a specific birthday where the math suddenly clicks into place. The truth …
Why the question isn’t really about age at all
Ask a financial planner when someone should start investing, and most will steer the conversation toward time rather than age. That’s because compounding, the mechanism that makes long term investing so powerful, cares about years in the market far more than the number on a birthday cake. A dollar invested at 22 behaves very differently than a dollar invested at 32, not because of anything magical about being in your twenties, but because it simply has more years to grow.
Carolyn McClanahan, a certified financial planner in Jacksonville, Florida, put it plainly when discussing this with CNBC: “Start saving as early as possible because you have the beauty of compound interest.” That’s the whole idea in one sentence. The earlier money goes to work, the less effort is required later to reach the same destination.
What the numbers actually show
It helps to see the math rather than just take someone’s word for it. CNBC ran a straightforward comparison using a hypothetical saver who begins putting away $100 a month at age 22. Assuming a 6% compounded return every month, they could have over $242,000 in savings by the time they’re 65.
Now shift that start date by just five years. If they started to save $100 per month at age 27, assuming the same retirement age and rate of return, their retirement savings would be roughly $174,000. That’s a gap of nearly $70,000 caused entirely by five years of delay, not by contributing more money. Other calculations, like one from the St. Louis Fed comparing a 25 year old and a 35 year old each investing $5,000 a year for a decade, show a similarly wide spread by retirement age, with the earlier saver ending up with noticeably more despite putting in the same total amount.
The teenage years: an underrated head start
For teenagers with any kind of earned income, whether from babysitting, lifeguarding, or a part time retail job, there’s an option that often surprises parents. A custodial Roth IRA can be opened for a minor at any age, with no minimum age requirement at all, as long as the child has qualifying earned income. Fidelity notes that a child under age 18 just needs earned income to open and fund a Roth IRA for Kids, even from jobs like babysitting or lifeguarding.
Contribution limits scale with what the child actually earns. For 2026, the Roth IRA contribution limit is $7,500 for individuals under age 50 or the total of earned income for the year, whichever is less. A teenager who earns $2,000 mowing lawns over a summer can contribute up to that amount, and because most teens owe little or nothing in federal income tax, the money grows completely tax free from that point forward. It’s a narrow window, but for families who catch it, the head start can be significant.
Your twenties: the highest leverage decade
If there’s a decade that financial advisors circle on the calendar, it’s this one. Someone who starts investing $100 a month at 25 rather than 35 can see the difference play out dramatically by retirement. One wealth management firm ran the numbers and found that at a 7% annual return, the 25-year-old accumulates approximately $584,000, while the 35-year-old reaches about $217,000, with the early starter investing only $12,000 more over their lifetime but ending up with $367,000 more.
Real world habits are shifting in this direction too. Survey data collected in 2025 found that on average, Gen Z made their first investment at 20-years-old, Millennials at 26-years-old, Gen X at 28-years-old, and Baby Boomers at 31-years-old. Younger generations, armed with commission free trading apps and fractional shares, are simply getting in earlier than their parents did, and the numbers above suggest that’s a genuinely useful habit rather than just a trend.
Starting in your thirties or forties: still worth doing
None of this means investing is pointless once someone passes 30 or 40. It just means the strategy usually needs to shift toward contributing more aggressively to make up lost time. Gloria Garcia Cisneros, a certified financial planner at LourdMurray, told CNBC that starting retirement savings later and aiming to retire in the late fifties is ambitious but “definitely doable,” adding that “three decades is a good amount of time for your money to grow and compound.”
The key adjustment, according to Garcia Cisneros, is that if you’re getting a later start, the trick is to make sure you’re saving more aggressively. A 40 year old with a stable income and a clear plan can still build meaningful wealth by retirement. It simply requires putting away a larger share of each paycheck to compensate for the years already gone.
What people actually do versus what they wish they’d done
There’s a fairly consistent regret running through the survey data on this topic. A 2025 study found that the majority, 80% of Americans, wish they had started investing earlier in life. That’s not a small majority. It’s the overwhelming consensus among people who have already lived through the consequences of waiting.
A separate Charles Schwab survey found something similar among women specifically. Surveyed women typically began investing at age 31, and 85% said they wish they started at an earlier age. The regret doesn’t seem tied to any particular income bracket or life stage. It shows up across the board, which is a fairly strong signal that earlier really is better, even if it’s not always possible.
Get the foundation right before chasing the calendar
Timing matters, but it isn’t the only variable worth respecting. High interest debt changes the math entirely, since credit card debt often carries interest rates above 20%, and paying off this debt typically provides better returns than investing, since you’re guaranteed to save the interest charges. For anyone carrying that kind of balance, clearing it usually beats the stock market on a risk adjusted basis.
Once debt is under control, the order of operations tends to favor workplace retirement accounts first. If an employer offers a 401(k) with matching contributions, that’s the place to start, since the employer match provides immediate returns before any investment growth occurs, and it’s worth contributing at least enough to capture the full match since it’s essentially free money that compounds over decades. From there, a Roth IRA often makes sense for younger workers, since Roth IRAs offer tax-free growth for young investors likely to be in higher tax brackets later.
Small amounts count more than people assume
One of the more persistent myths about investing is that it requires substantial savings to be worthwhile. The reality is closer to the opposite. As one advisory firm put it, you don’t need large sums to begin, and starting with small, consistent amounts builds the habit and begins the compounding process immediately, since even $25 or $50 monthly investments start working for you right away.
Technology has made this easier than it used to be. Twenty five years ago, opening a brokerage account often meant a minimum deposit in the thousands and trading fees that ate into small contributions. Today, fractional shares and zero commission platforms mean the barrier to starting has never been lower, which is part of why younger generations are showing up to the market earlier than their parents and grandparents did.
Life stage matters more than a fixed number
Perhaps the most honest answer to the original question is that the ideal age depends less on hitting a specific milestone and more on when someone has stable income, a manageable debt load, and access to an account. For some, that’s 16 with a summer job and a custodial Roth IRA. For others, it’s 26 after finishing school and landing a first full time position. The math rewards earlier starts consistently, but it doesn’t punish people for starting when their life circumstances actually allow it.
What seems to matter most is not waiting for perfect conditions. Someone with modest income and a small monthly contribution who starts now will, in most scenarios, end up ahead of someone who waits for a raise, a bonus, or a less busy season before getting started. The data across nearly every study cited here points to the same conclusion, that the gap created by even five or ten years of delay is difficult to close later, no matter how much extra is contributed afterward.
Final thoughts
If there’s a single takeaway buried in all these numbers, it’s that the “ideal age” is really just the age someone happens to be right now, provided there’s a bit of income and a plan for what to do with it. Waiting for a better moment tends to cost more than people expect, and starting small beats waiting for the ability to start big. The decade someone chooses to begin matters, but the decision to begin at all matters more.
