Choosing between a 401(k) and an IRA is one of the most important financial decisions you’ll make. Both are powerful retirement savings tools with significant tax advantages, but they work differently, have different limits, and suit different financial situations. This comprehensive guide breaks down exactly how each plan works, the 2026 contribution limits, tax benefits, and which one is right for you.
What Is a 401(k)?
A 401(k) is an employer-sponsored retirement savings plan that allows you to contribute a portion of your paycheck before taxes are deducted. Many employers also offer a matching contribution — essentially free money added to your account.
How a 401(k) Works
- Contributions: Pre-tax dollars deducted directly from your paycheck
- Employer match: Many employers match a percentage of your contributions (e.g., 50% match up to 6% of salary)
- Tax-deferred growth: Your investments grow tax-free until withdrawal
- Taxed at withdrawal: You pay income tax when you take money out in retirement
2026 401(k) Contribution Limits
| Category | Annual Limit | Monthly Equivalent |
|---|---|---|
| Employee contributions (under 50) | $23,500 | $1,958 |
| Employee contributions (50+) | $31,000 | $2,583 |
| Total limit (employee + employer) | $70,000 | $5,833 |
What Is an IRA?
An Individual Retirement Account (IRA) is a personal retirement savings account that you open and manage yourself, independent of your employer. There are two main types: Traditional IRA and Roth IRA.
Traditional IRA
- Contributions: May be tax-deductible (depending on income and employer plan access)
- Tax-deferred growth: Investments grow tax-free until withdrawal
- Taxed at withdrawal: You pay income tax when you take money out in retirement
- Required Minimum Distributions (RMDs): Must start withdrawing at age 73
Roth IRA
- Contributions: Made with after-tax dollars (no upfront tax deduction)
- Tax-free growth: Investments grow completely tax-free
- Tax-free withdrawals: You pay NO taxes when you take money out in retirement
- No RMDs: No required minimum distributions during your lifetime
- Income limits: High earners may not be eligible to contribute directly
2026 IRA Contribution Limits
| Category | Annual Limit | Monthly Equivalent |
|---|---|---|
| Under 50 | $7,000 | $583 |
| 50 and older | $8,000 | $667 |
401(k) vs IRA: Side-by-Side Comparison
| Feature | 401(k) | Traditional IRA | Roth IRA |
|---|---|---|---|
| 2026 Contribution Limit | $23,500 | $7,000 | $7,000 |
| Employer Match | Yes (common) | No | No |
| Tax Deduction | Yes (pre-tax) | Maybe | No |
| Tax on Withdrawal | Yes (income tax) | Yes (income tax) | No |
| Income Limits | No | No (deduction limits) | Yes ($150k-$165k single) |
| RMDs | Yes (age 73) | Yes (age 73) | No |
| Early Withdrawal Penalty | 10% before 59½ | 10% before 59½ | Contributions: No penalty |
| Loan Option | Yes | No | No |
Which Should You Choose? Decision Framework
Choose 401(k) First If:
- Your employer offers a match: Always contribute enough to get the full match — it’s an instant 50-100% return on your money
- You want to save more: The $23,500 limit is much higher than the $7,000 IRA limit
- You want simplicity: Automatic paycheck deductions make saving effortless
- You want loan access: Most 401(k) plans allow loans against your balance
Choose IRA (Especially Roth) If:
- You want tax-free retirement income: Roth IRA withdrawals are completely tax-free
- You expect higher taxes in retirement: Pay taxes now at a lower rate
- Your employer doesn’t offer a match: An IRA gives you more investment choices
- You want more investment options: IRAs typically offer thousands of investment choices vs. a 401(k)’s limited menu
- You want to avoid RMDs: Roth IRAs have no required minimum distributions
The Optimal Strategy: Use Both
For most people, the best approach is to use both a 401(k) and an IRA. Here’s the optimal order of operations:
Step 1: Contribute to 401(k) Up to Employer Match
If your employer matches 50% up to 6% of salary, contribute exactly 6%. This gives you an immediate 50% return.
Example: $60,000 salary × 6% = $3,600 contribution. Employer matches 50% = $1,800 free money. Total: $5,400 in your 401(k) per year.
Step 2: Max Out Your Roth IRA
After getting the full 401(k) match, contribute up to the $7,000 IRA limit. A Roth IRA is usually the better choice because:
- Tax-free growth and withdrawals in retirement
- No RMDs — you control when you take money out
- Contributions (not earnings) can be withdrawn anytime without penalty
Step 3: Go Back and Max Out Your 401(k)
If you still have money to save, increase your 401(k) contributions up to the $23,500 limit.
Tax Savings Comparison: $60,000 Salary
Let’s see how different strategies affect your taxes. Assuming a $60,000 salary, 22% federal tax bracket, and 5% state tax:
| Strategy | Annual Contribution | Tax Savings (Year 1) | Taxable Income Reduced By |
|---|---|---|---|
| No retirement savings | $0 | $0 | $0 |
| 401(k) to match only | $3,600 | $972 | $3,600 |
| 401(k) + Roth IRA | $10,600 | $972 | $3,600 (401k only) |
| 401(k) maxed | $23,500 | $6,345 | $23,500 |
| Both maxed | $30,500 | $6,345 | $23,500 (401k only) |
Note: Roth IRA contributions are made with after-tax dollars, so they don’t reduce your current taxable income. But they grow and are withdrawn completely tax-free.
Roth IRA Income Limits (2026)
Not everyone can contribute directly to a Roth IRA. Here are the 2026 income limits:
| Filing Status | Full Contribution | Partial Contribution | No Contribution |
|---|---|---|---|
| Single / Head of Household | Under $150,000 | $150,000 – $165,000 | Over $165,000 |
| Married Filing Jointly | Under $236,000 | $236,000 – $246,000 | Over $246,000 |
Workaround: If your income exceeds these limits, use the “backdoor Roth IRA” strategy — contribute to a Traditional IRA (non-deductible) and then convert it to a Roth IRA. This is legal and widely used.
Common Mistakes to Avoid
- Not getting the full employer match: This is leaving free money on the table. Always contribute at least enough to get the full match.
- Choosing Traditional over Roth without thinking: If you’re in a low tax bracket now, Roth is usually better. If you’re in a high bracket, Traditional may save more.
- Withdrawing early: Early withdrawals before 59½ incur a 10% penalty plus taxes. Only withdraw as a last resort.
- Ignoring IRA options: If your 401(k) has limited investment choices, an IRA gives you access to low-cost index funds and more flexibility.
- Not adjusting contributions with raises: When you get a raise, increase your retirement contributions to maintain your savings rate.
Frequently Asked Questions
Should I contribute to a 401(k) or IRA first?
Always contribute to your 401(k) first to get the full employer match (it’s free money). Then max out a Roth IRA. Finally, go back and increase your 401(k) contributions.
Can I have both a 401(k) and an IRA?
Yes! You can have both simultaneously. In fact, using both is the optimal strategy for most people. The contribution limits are separate.
What if my income is too high for a Roth IRA?
Use the backdoor Roth IRA strategy: contribute to a non-deductible Traditional IRA, then convert it to a Roth. This works regardless of income level.
Is a Roth 401(k) better than a Traditional 401(k)?
A Roth 401(k) combines the high contribution limits of a 401(k) with the tax-free withdrawals of a Roth IRA. If your employer offers it and you expect higher taxes in retirement, a Roth 401(k) can be the best of both worlds.
How much should I save for retirement?
A general rule is to save 15-20% of your gross income for retirement. Start with the employer match, then gradually increase. Use our Salary Calculator to see how much you can realistically save.
Use Our Salary Calculator to Plan Your Retirement
Understanding your take-home pay is the first step to smart retirement planning. Use our free Salary Calculator to convert between hourly and annual pay, and see exactly how much you take home after taxes.
Related tools:
- Pay Raise Calculator — See how a raise affects your take-home pay and retirement savings potential
- Take-Home Pay by State — Compare after-tax income across all 50 states
- Real Hourly Rate Calculator — Understand your true hourly value including benefits
Last updated: July 2026. Tax laws and contribution limits change annually. Consult a financial advisor for personalized retirement planning advice.