401(k) Basics
A 401(k) is an employer-sponsored retirement plan that allows you to save and invest a portion of your paycheck before taxes are taken out. Many employers match your contributions up to a certain percentage.
2026 Contribution Limits
- Employee contribution: $24,500
- Catch-up contribution (50+): $7,500 additional
- Total limit (employee + employer): $69,000 ($76,500 with catch-up)
Employer Matching
Employer matching is free money. Common formulas include: 50% of your contributions up to 6% of your salary, 100% up to 3%, or dollar-for-dollar up to 4%. Always contribute at least enough to get the full match.
Example: If you earn $80,000 and your employer matches 50% up to 6%, contributing $4,800 (6%) gets you an additional $2,400 from your employer—an instant 50% return.
Traditional vs Roth 401(k)
Traditional 401(k)
- Pre-tax contributions
- Reduces your taxable income now
- Pay taxes on withdrawals in retirement
- Best if you expect to be in a lower tax bracket in retirement
Roth 401(k)
- After-tax contributions
- No tax reduction now
- Tax-free withdrawals in retirement
- Best if you expect to be in a higher tax bracket in retirement
Early Withdrawal Penalties
Withdrawing money before age 59½ generally results in regular income tax plus a 10% penalty. Exceptions include: financial hardship, unreimbursed medical expenses exceeding 7.5% of income, disability, or first-time home purchase (up to $10,000).
Key Takeaways
- Contribute at least enough to get the full employer match
- 2026 contribution limit is $24,500 ($32,500 if 50+)
- Choose Traditional for tax savings now, Roth for tax-free withdrawals later
- Avoid early withdrawals to avoid 10% penalties
Frequently Asked Questions
Find answers to common questions about your taxes and our calculator.
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