Updated 2026-03-30
How to Pick 401(k) Investments: Allocation Guide
Build the right portfolio based on your age, risk tolerance, and timeline
Your 401(k) investment allocation is the single biggest factor in your long-term returns. Get the stock-to-bond ratio right for your age and risk tolerance, keep costs low, and rebalance regularly.
Age-Based Allocation Guidelines
| Age Range | Stocks | Bonds | Stable Value | Risk Level |
|---|---|---|---|---|
| 20-30 | 90% | 10% | 0% | Aggressive |
| 30-40 | 80% | 15% | 5% | Growth |
| 40-50 | 70% | 25% | 5% | Moderate |
| 50-60 | 60% | 30% | 10% | Balanced |
| 60+ | 40-50% | 35-40% | 15-20% | Conservative |
Fund Types in Your 401(k)
- Target-date funds: Automatically adjust allocation as you approach retirement. Best for hands-off investors.
- Index funds: Track market indexes (S&P 500, total market) with low expense ratios (0.02-0.10%).
- Actively managed funds: Fund managers pick stocks. Higher fees (0.50-1.50%), rarely beat index funds long-term.
- Stable value funds: 401(k)-only option providing steady returns (2-3%) with no market risk.
Frequently Asked Questions
Target-date funds are ideal if you want simplicity. They automatically rebalance and shift to bonds as you age. Build your own if you want lower fees (target-date fund fees are 0.10-0.75% vs 0.02-0.05% for index funds) or a custom allocation that matches your risk tolerance.
Rebalance once or twice per year, or when any asset class drifts more than 5% from your target allocation. Many plans offer automatic rebalancing. Do not rebalance in response to market volatility - that leads to buying high and selling low.
Pavlo Pyskunov
Managing Director & Investment Fund Director
Pavlo Pyskunov analyzes employer-sponsored retirement plans using IRS publications and DOL Form 5500 filings, helping workers maximize their 401(k) savings through data-driven guidance.
Last updated: 2026-03-30