What stock/bond allocation should you have at 25?
There's no single "right" stock/bond split at 25 — 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.
At 25, inflation is the risk that should keep you up at night
With four decades before you spend this money, a market drop is a temporary dip you have the time to ride out. The risk that actually sticks is that a too-cautious mix never outpaces inflation. Over a horizon this long, rising prices compound quietly in the background, and a portfolio weighted toward bonds or cash can lose real purchasing power even as the balance ticks upward.
That is why a young saver’s real danger is usually being too conservative, not too aggressive. Volatility feels like the threat because you watch it move day to day, but at 25 you are buying shares you will not touch for decades. More stocks widen the range of outcomes, yet they also lift the median and give a long horizon something to grow against.
None of this argues for reckless bets on a single stock. A broadly diversified stock allocation, held through the declines that will certainly come, is what turns a long runway into an advantage. The job at 25 is to let time do the work that volatility only appears to threaten.
Common questions
What is the best stock/bond allocation at 25?
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 25?
A common rule of thumb is "110 minus your age" in stocks (about 85% at 25), 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 25?
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.