What is the 401(k) contribution limit for 2025 and 2026?

The employee deferral limit is $23,500 for 2025 and $24,500 for 2026. If you are 50 or older, catch-up contributions add $7,500 (2025) or $7,500 (2026), bringing the total to $31,000 and $32,000 respectively. The total employer + employee limit is $70,000 for 2025.

What is a 401(k) true-up provision?

A true-up is a year-end reconciliation where your employer calculates whether you received the full match you were entitled to, regardless of contribution timing. Without a true-up, front-loading your 401(k) can cause you to miss months of employer match.

Should I choose Traditional or Roth 401(k) contributions?

If you expect your tax rate to be lower in retirement (most people), Traditional gives you a bigger tax break now. If you expect higher rates in retirement or want tax-free withdrawals, Roth is better. For a deep comparison, see our Traditional vs. Roth math guide.

retirement Audience: general 3 min read

Direct 401(k) Contributions: Maximizing Your Match & Tax Breaks

Are you front-loading your 401(k)? You might be missing out on your employer match. Learn the right cadence for contributions.

Last updated on February 18, 2026

You want to max out your 401(k) ($23,500 in 2025, $24,500 in 2026). So you set your contribution rate to 50% to “get it over with” by June. Stop. Unless your company has a “True-Up” provision, you just cost yourself thousands in free money.

Key Takeaways

The Mechanism: Most employers match *per paycheck*. If you contribute $0 in December because you maxed out in June, they match $0 in December.
The True-Up: Some (good) plans reconcile this at year-end. Most don't.
The Fix: Calculate the % needed to hit the max exactly on Dec 31st.
Bonus: If you change jobs, be careful not to over-contribute (aggregate limit applies to You, not the Plan).

The Math of the Missed Match

Salary: $200,000.
Match: 4% ($8,000 potential).
Scenario A (Front Load): You put in $23,500 by June.
- Jan-June Earnings: $100,000. Match (4%): $4,000.
- July-Dec Earnings: $100,000. Contribution: $0. Match: $0.
- Total Match: $4,000. Loss: $4,000.
Scenario B (Smooth): You contribute 11.75% per check all year.
- Total Match: $8,000.

Check your handbook for “True-Up.” If it’s not there, slow down.

Traditional vs. Roth 401(k)

Once you have the cadence right, the next question is which bucket to contribute to. The Traditional vs. Roth math depends on your current marginal tax rate versus your expected rate in retirement. If you are in the 32% or 37% bracket now and expect to be in the 22-24% bracket in retirement, Traditional contributions give you a larger immediate tax break.

For a detailed comparison of how this decision interacts with your broader 401(k) strategy, see our strategy page.

Beyond the Deferral Limit

If you have maxed out your employee deferral and want to save even more, look into the Mega Backdoor Roth. Some employer plans allow after-tax contributions up to the total annual limit ($70,000 in 2025), which can then be converted to Roth. This is one of the most powerful wealth-building moves available to W-2 employees. High earners with self-employment income may also benefit from a defined benefit plan.

For a comprehensive look at tax reduction strategies when your income exceeds $200k, see our guide to tax strategies for high-income earners.

How sharper.tax Helps

sharper.tax analyzes your uploaded return to determine whether you maximized your 401(k) contributions and whether the Traditional or Roth election was optimal for your bracket. If you left employer match on the table or undercontributed, we quantify the missed tax savings and show the impact on your effective tax rate. Sophisticated tax planning used to require a high-end CPA --- we make it available for free.

Sources

The information above is educational and not tax advice.