401(k) Guide 2026: Contribution Limits, Employer Match, and Investment Choices

A 401(k) is the most powerful retirement savings tool available to most Americans — especially when your employer offers matching contributions. Here's everything you need to know to maximize yours in 2026.

A 401(k) is an employer-sponsored retirement savings plan that allows you to contribute pre-tax (traditional) or after-tax (Roth) dollars from your paycheck. Your money grows tax-advantaged until retirement.

Key benefits:

• Reduces your taxable income (traditional) or grows tax-free (Roth)
• Employer matching = free money
• Higher contribution limits than IRAs
• Automatic payroll deductions make saving effortless

Rule of thumb: If you're early in your career (lower income), choose Roth. If you're in your peak earning years (higher income), traditional often makes more sense.

The employer match is the most important benefit of a 401(k). A common match: 100% of contributions up to 3% of salary.

Example: You earn $60,000/year. Your employer matches 100% up to 3%.

• You contribute 3% ($1,800/year)
• Employer adds $1,800/year
• Total: $3,600/year — you doubled your contribution instantly

This is a 100% immediate return on investment. Always contribute at least enough to get the full employer match — it's the highest guaranteed return available anywhere.

A target-date fund (e.g., "Vanguard Target Retirement 2055") automatically adjusts your allocation from aggressive (mostly stocks) to conservative (more bonds) as you approach retirement.

Best for: People who don't want to manage their allocation.

Build your own portfolio with low-cost index funds:

Simple 3-fund portfolio:

• 60% U.S. stock index fund (e.g., Fidelity 500 Index)
• 20% International stock index fund
• 20% Bond index fund

Aggressive (under 40):

• 80% U.S. stocks
• 20% International stocks

Moderate (40–55):

• 60% U.S. stocks
• 20% International stocks
• 20% Bonds

Conservative (55+):

• 40% U.S. stocks
• 20% International stocks
• 40% Bonds

• High-fee actively managed funds — Expense ratios above 0.50% significantly reduce long-term returns
• Company stock — Concentrating retirement savings in your employer's stock is risky
• Stable value funds — Low returns; only appropriate for money you'll need very soon

When you leave a job, you have 4 options for your 401(k):

1. Leave it — Keep it in your old employer's plan (if allowed)
2. Roll to new employer's 401(k) — Consolidate into your new plan
3. Roll to IRA — More investment options, often lower fees
4. Cash out — Never do this. You'll pay income tax + 10% penalty, losing 30%–40% of the balance

Best option: Roll to an IRA at Fidelity, Vanguard, or Schwab for maximum investment flexibility and low fees.

Priority order:

1. Contribute enough to get the full employer match (minimum)
2. Max out Roth IRA ($7,000/year)
3. Max out 401(k) ($23,000/year)
4. Taxable brokerage account

If you can't max out, aim for at least 15% of gross income total (including employer match).

Your 401(k) is the foundation of your retirement savings. At minimum, contribute enough to capture the full employer match — it's free money. Then increase contributions over time until you're maxing out. Invest in low-cost index funds or a target-date fund, and never cash out when changing jobs.

This article is for educational purposes only and does not constitute financial advice. See our editorial guidelines.