Maxing out your 401(k) means contributing the IRS annual maximum — $23,000 in 2026 (plus $7,500 in catch-up contributions if you’re 50 or older). For most people, hitting that ceiling requires intentional action: understanding how much to contribute each paycheck, which investments to choose, and what to do after the 401(k) is full. Here’s the step-by-step process.
The 2026 401(k) Contribution Limits
- Employee contribution limit: $23,000
- Catch-up contribution (age 50+): Additional $7,500, for a total of $30,500
- Total with employer contributions: $69,000 (or 100% of compensation, whichever is less)
The $23,000 employee limit is what you control. Employer matching contributions don’t count against this limit — they go into a separate “employer” bucket with a higher ceiling.
Step 1: Calculate Your Per-Paycheck Contribution
Divide the annual limit by your number of pay periods:
- Biweekly (26 pay periods): $23,000 / 26 = $884.62 per paycheck
- Semi-monthly (24 pay periods): $23,000 / 24 = $958.33 per paycheck
- Monthly (12 pay periods): $23,000 / 12 = $1,916.67 per paycheck
Log into your 401(k) plan portal and update your contribution to the required dollar amount or percentage that achieves this. Many plans let you set a dollar amount directly; others require a percentage of salary.
Step 2: Make Sure You’re Still Getting the Full Employer Match
Some employers match based on each paycheck contributed, not the annual total. If you front-load your contributions and hit the $23,000 limit by October, you’ll miss out on employer matching for the last three months of the year. Check whether your plan has a “true-up” provision — if it does, you’ll receive the full match at year-end regardless. If not, spread contributions evenly across all pay periods to capture every match dollar.
Step 3: Choose the Right Investment Allocation
Once your contribution rate is set, the money needs to be invested. Default options are often money market funds or stable value funds — they won’t grow meaningfully over time. Log in and set your investment elections:
- Target-date fund: Simplest option. Pick the fund closest to your expected retirement year (e.g., “2055 Fund”). It automatically adjusts allocation as you age.
- Index funds: If your plan offers low-cost index funds (look for expense ratios under 0.20%), build a simple portfolio: 70% US index fund, 20% international index fund, 10% bond fund. Adjust based on your risk tolerance.
- Actively managed funds: Generally avoid if low-cost index alternatives exist. Most active managers underperform their benchmark over 10+ year periods.
Step 4: Decide Traditional vs. Roth 401(k)
Many employers now offer a Roth 401(k) option alongside the traditional pre-tax version.
- Traditional 401(k): Contributions are pre-tax, reducing your taxable income now. You pay tax on withdrawals in retirement.
- Roth 401(k): Contributions are after-tax. You get no immediate deduction, but withdrawals in retirement are tax-free.
If you expect to be in a higher tax bracket in retirement (or if you’re early in your career), favor Roth. If you’re in your peak earning years and want the immediate deduction, favor traditional. Many people split contributions between both.
Step 5: Automate the Increase
If you can’t max out immediately, set a contribution rate you can sustain and auto-escalate it by 1-2% each year. Most plans have this feature — enable it so every raise partially funds your retirement rather than fully funding lifestyle inflation.
What to Do After Maxing Your 401(k)
Once you’ve hit the $23,000 employee limit, follow the waterfall:
- Max out your HSA ($4,300 individual / $8,550 family in 2026) if you have a high-deductible health plan
- Max out your IRA ($7,000, or backdoor Roth if you’re over the income limit)
- Invest additional savings in a taxable brokerage account
Related: What Is a SIMPLE IRA? 2026 Guide for Small Business Employees