What stock/bond allocation should you have at 30?
There's no single "right" stock/bond split at 30 — it's a trade-off between growth and stability. Running thousands of historical market sequences on a retirement portfolio, a higher stock allocation raises the median result but widens the range of outcomes. Here's the honest picture across allocations.
Monte Carlo outcomes by allocation
Ending balance (today's dollars) across 700 historical-market simulations for a retiree drawing a moderate income. The 10th percentile is the "bad luck" case; the 90th is "good luck":
| Allocation | Downside (10th %ile) | Median | Upside (90th %ile) |
|---|---|---|---|
| 20% / 80% | -$1,497 | $117,641 | $2,498,191 |
| 40% / 60% | $63,688 | $753,755 | $3,242,669 |
| 60% / 40% | $263,101 | $1,790,077 | $4,136,663 |
| 80% / 20% | $649,753 | $3,257,068 | $6,422,357 |
| 100% / 0% | $866,617 | $5,153,750 | $10,011,388 |
How to actually choose
The table shows the trade-off; your allocation should follow from your situation, not a single "best" number:
- Long horizon favors stocks. Over 20–30+ years, inflation is a bigger threat than volatility — too few stocks can quietly fail to keep up. That's why many long retirements still hold 50–70%+ in stocks.
- Sequence risk favors some bonds near retirement. A bond/cash buffer (a "bond tent") lets you avoid selling stocks into an early downturn — the most dangerous moment for a portfolio.
- Match it to your nerves and your floor. If guaranteed income (Social Security, a pension) covers your essentials, you can hold more stocks with the rest. If the portfolio must cover everything, more bonds buy stability.
A common age-based rule of thumb is "110 minus your age in stocks," but it's only a starting point. These figures assume a retiree with modest Social Security drawing a moderate income; a rule of thumb can't see your full picture — model yours in the calculator's Simulation Tools.
The quiet cost of playing it safe in your thirties
The urge to dial down risk after a scare is understandable, but for someone at 30 who keeps contributing every month, a downturn is closer to a discount than a disaster. Dollar-cost averaging — investing a steady amount on a schedule — means a falling market buys more shares per dollar, and those cheap shares do the heaviest lifting when prices recover.
A portfolio that is too conservative this early gives that mechanism away. Holding a large bond or cash position to avoid short-term losses trades a real, decades-long need for growth against a discomfort that lasts only until the market turns. The balance may feel steadier, but steadiness is not the goal while you are still adding to the pot.
The discipline that matters at 30 is not pinning down the perfect percentage; it is continuing to buy through the ugly stretches instead of pausing contributions or selling out. An allocation you can actually hold when the headlines are grim is worth more than a bolder one you will abandon at the bottom.
Common questions
What is the best stock/bond allocation at 30?
There isn't one "best" — it's a trade-off. In this stress test, more stocks raise the median outcome but widen the range of results. A middle allocation (often 50–70% stocks) balances growth against stability; the right choice depends on your horizon, other income, and risk tolerance.
How much should I have in stocks at 30?
A common rule of thumb is "110 minus your age" in stocks (about 80% at 30), but it's only a starting point. Over a long horizon, holding enough stocks to outpace inflation matters as much as limiting volatility.
Is 100% stocks too risky at 30?
It has the highest expected growth but the widest swings, including deep drawdowns. Whether that's "too risky" depends on your time horizon and whether guaranteed income covers your essential spending — if it does, you can tolerate more stock exposure.