Asset Allocation by Age: A Practical Guide
May 22, 2026
11min read
portfolio
My daughter Sophie is seven. She asked me last week what I do for work. I told her I help people decide how to split their money between different types of investments. She thought about this for a second and said, "So you're like the person who decides how much candy goes in each bowl?"
Honestly, that's not a bad analogy. Asset allocation is exactly that: deciding how much of your financial candy goes into each bowl. Except the bowls are stocks, bonds, and alternatives, and getting the mix wrong can cost you decades of retirement.
Here's what 14 years of portfolio analysis has taught me about allocation at different ages.
Your 20s: The Aggression Window
If you're in your 20s, you have something priceless: time. A 25-year-old has 40 years until retirement, which means they can ride out multiple market crashes and still come out ahead. The data is crystal clear on this.
My recommendation for 20-somethings: 90-100% stocks, 0-10% bonds. Maybe a tiny slice of alternatives if you're feeling adventurous. You don't need bonds for stability because your job income is your stability. A market crash when you're 28 is a buying opportunity, not a catastrophe.
When I was 25, I was 100% in stocks. Mostly index funds, a few individual stocks I thought I was smart enough to pick (I wasn't). The 2008 crash hit when I was 27. My portfolio dropped 40%. I kept contributing every month. By 2011, I'd made it all back and then some. That's the power of time.
Your 30s: Still Aggressive, But Diversifying
By your 30s, life gets complicated. Maybe kids, maybe a mortgage, maybe aging parents. Your risk tolerance might shift even if your time horizon hasn't.Model Your Portfolio
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I typically recommend 80-90% stocks, 10-20% bonds in your 30s. The bond allocation isn't really for returns, it's for behavioral stability. When the next 2008 happens and your $200,000 portfolio drops to $140,000, having some bonds makes it easier to sleep and harder to panic-sell.
I'm 41 now, and my allocation is roughly 85% stocks, 15% bonds. Cooper doesn't care about my asset allocation, but my wife Jessica does, and she sleeps better knowing we have some stability in there.
Your 40s: The Glide Path Begins
This is where I see the biggest mistakes. People either stay way too aggressive (100% stocks at 48 is gambling, not investing) or get way too conservative (50% bonds at 42 is leaving money on the table).
My rule of thumb: 110 minus your age as a stock percentage. So at 45, you'd be 65% stocks, 35% bonds. I think that's slightly too conservative, actually. I'd lean toward 120 minus your age. At 45: 75% stocks, 25% bonds.
The key insight here is that you're probably in your peak earning years. Maxing out retirement accounts matters more than ever. Every dollar you put in now has 15-20 years to compound. Don't get so conservative that you miss that growth.
Your 50s: Catch-Up Mode
The catch-up contribution age! As of 2026, you can put an extra $8,000 in your 401(k). This is when allocation strategy intersects with contribution strategy.
I recommend 60-70% stocks in your 50s. You still need growth because you might live 30+ years in retirement, but you also can't afford a 2008-style crash right before you retire.
My father-in-law ignored this advice. Stayed 90% stocks into his late 50s. The 2022 downturn hit his portfolio hard, right when he was planning to retire at 62. He ended up working two more years. Not catastrophic, but not ideal either.
Your 60s and Beyond: The Retirement Transition
This is the trickiest period. You're not done investing yet, not by a long shot. If you retire at 65 and live to 90, that's 25 years of portfolio growth still needed.
I typically recommend a bucket approach in retirement. 1-2 years of expenses in cash. 3-5 years in short-term bonds. The rest in a 50-60% stock portfolio. This lets you ride out downturns without selling stocks at the bottom.
The "your age in bonds" rule? Outdated. With people living to their 90s, you need more growth than that allows. A 65-year-old with 35% bonds is probably too conservative unless they've saved way more than they need.
Rebalancing: The Discipline That Matters
Setting your allocation is only half the battle. You have to actually maintain it. Markets move, and before you know it, your 80/20 portfolio has drifted to 90/10 because stocks outperformed.
I rebalance once a year, in January. Takes about 30 minutes. Some people do it when any asset class drifts 5% from target. Either approach works. The key is having a rule and following it.
Use the asset allocation planner on this site to model different scenarios. See what a 60/40 portfolio looks like versus 80/20 over your time horizon. The numbers might surprise you.
Why the 60/40 Portfolio Isn't Dead
You've probably read the headlines. "The 60/40 portfolio is dead!" They said it in 2022 when both stocks and bonds fell together. They said it in 2008. They'll say it again. Here's the thing: 60/40 isn't perfect, but it's not dead either.
A 60/40 portfolio (60% stocks, 40% bonds) has returned roughly 8% annually over the past 50 years. Not every year, obviously. But over time, the diversification works. When stocks crash, bonds usually hold up or even rise. When bonds struggle, stocks often compensate.
2022 was the exception, not the rule. Both fell because inflation spiked and the Fed raised rates aggressively. That was the worst year for 60/40 since 1937. One bad year doesn't invalidate a strategy that has worked for half a century.
Alternative Assets: Worth It?
Real estate, commodities, crypto, private equity. Everyone wants to know if they should add "alternatives" to their portfolio.
My take: for most individual investors, keep it simple. A three-fund portfolio (US stocks, international stocks, bonds) covers almost everything you need. If you want to add REITs at 5-10% for diversification, fine. Crypto? Only money you can afford to lose completely.
The more complex your allocation, the more rebalancing work you create, and the more likely you are to tinker impulsively. Simple allocations are easier to maintain and often perform just as well.
Rebalancing in Practice
Markets move. Your 80/20 portfolio drifts to 85/15 after a good stock run. What do you do?
I rebalance in January. Takes 30 minutes. I sell whatever is overweight, buy whatever is underweight, and I'm done for the year. Some people use 5% bands (rebalance when any asset class drifts 5% from target). Either approach works.
The key discipline: rebalance when your plan says to, not when you feel like it. After a market crash, rebalancing means buying stocks when they're down. That's psychologically hard but mathematically correct.
Final Thoughts
Look, I'm just a guy in Denver with a spreadsheet habit and a dog who sheds too much. I don't have a crystal ball. I can't predict where the market is going next month or next year. Nobody can, despite what they might tell you on TV.
What I can do is show you the math. The numbers don't lie, even when we want them to. Compound interest works. Fees matter. Diversification protects you. Time is your greatest asset if you're young, and your greatest concern if you're not.
The tools on this site are free because I believe everyone deserves access to honest financial analysis. No sales pitch, no hidden agenda, no commissions. Just data and my occasionally sarcastic commentary.
If you take one thing from this article, let it be this: small decisions made consistently beat perfect decisions made occasionally. Start where you are. Use what you have. Do what you can. The rest is just compounding.
What I Learned from 14 Years in the Industry
After analyzing thousands of portfolios at three different firms here in Colorado, I've developed a few principles that guide everything I write on this site. These aren't fancy theories from textbooks. They're observations from real people with real money making real mistakes.
First, complexity is the enemy of execution. The more complicated your investment strategy, the less likely you are to follow it consistently. I've seen PhDs in mathematics fail at personal finance because they couldn't stop tinkering. Meanwhile, my neighbor who barely graduated high school built a $2 million portfolio using nothing but a target-date fund and automatic contributions. Simplicity wins because simplicity is sustainable.
Second, behavior matters more than knowledge. Everyone knows they should buy low and sell high. But when the market drops 30%, emotions take over. I've watched incredibly smart people panic-sell at the bottom and miss the recovery. The best investment strategy is the one you'll actually stick with when things get ugly. That's usually the boring strategy.
Third, fees are the only thing you can control. You can't control market returns. You can't control inflation. You can't control what the Federal Reserve does. But you can absolutely control how much you pay in investment fees. And over decades, that control is worth hundreds of thousands of dollars.
Cooper is scratching at the door now, which means it's time for our afternoon walk along the South Platte. Before I go, let me leave you with this: the best financial decision you can make today is the one you actually follow through on. Not the perfect theoretical strategy. The one you implement. The one you stick with. The one that becomes a habit.
That's just my take. I'm a guy with a spreadsheet and a shedding dog. Do your own homework. And if you found this helpful, try one of the calculators on this site. The numbers might surprise you.
M
About Marcus Thornton
Independent investment researcher based in Denver, Colorado. Former portfolio analyst with 14 years of experience. CFA charterholder. When not crunching numbers, you'll find him skiing the Rockies or fly-fishing the South Platte with his dog Cooper.
Marcus T.