The Short Answer

1. The Employee Contribution Limit Is Not the Employer Match Limit

For 2026, the regular employee elective deferral limit for most 401(k) plans (other than SIMPLE 401(k) plans) is $24,500, up from $23,500 in 2025.

This is the amount you can contribute from your own compensation, whether you choose Traditional pre-tax contributions, Roth contributions, or a combination of both.

The limit generally applies to your combined employee deferrals across applicable retirement plans, including 401(k) plans from different employers.

Reaching $24,500 does not mean that your employer must stop contributing to your retirement account.

Employer matching contributions do not count toward your individual $24,500 elective deferral limit.

Instead, employee contributions and employer contributions are subject to a separate overall annual additions limit. For 2026, that limit is generally the lesser of:

• $72,000, excluding qualifying catch-up contributions; or
• 100% of your compensation.

Unlike the individual elective deferral limit, the annual additions limit generally applies separately to plans maintained by unrelated employers. Plans maintained by the same employer or related employers must generally be aggregated.

In other words, someone who contributes the full $24,500 may still receive employer matching contributions, subject to the applicable plan rules and overall contribution limits.

For employees age 50 or older, additional catch-up contributions may be permitted. The regular 2026 catch-up limit is $8,000, with a higher $11,250 catch-up limit for eligible employees ages 60 through 63.

Beginning in 2026, certain higher-wage employees must make their catch-up contributions on a Roth basis. For 2026, this generally applies when an employee’s 2025 Social Security wages from the employer sponsoring the plan exceeded $150,000.

See the IRS 401(k) contribution limits and catch-up contribution rules.

2. Why Your Paycheck Gets Bigger After You Max Out

When you reach the annual limit, your employer’s payroll system generally stops further employee elective deferrals.

That means money previously directed into your 401(k) can now remain in your paycheck.

But the tax consequences depend on which type of contribution you were making.

Traditional Pre-tax 401(k)

Traditional pre-tax contributions generally reduce your current federal taxable wages.

Suppose you normally contribute $1,000 from each paycheck to your pre-tax 401(k).

That $1,000 generally is not included in your federal taxable wages for that paycheck.

Once you stop contributing, the $1,000 remains part of your current taxable wages instead.

Your federal income tax withholding may therefore increase. Your take-home pay still generally rises, but not necessarily by the full $1,000.

Importantly, pre-tax 401(k) contributions do not reduce wages subject to Social Security and Medicare taxes. Those wages generally include your elective deferrals whether you contribute to the 401(k) or receive the compensation directly.

Roth 401(k)

Roth 401(k) contributions work differently.

They are made with after-tax compensation, so they do not reduce your current federal taxable wages.

If your Roth contributions stop after reaching the annual limit, your take-home pay may increase by approximately the amount previously contributed, assuming no other payroll changes.

There is no additional federal taxable wage increase simply because the Roth contribution stopped. Those wages were already taxable.

The distinction also matters when looking at your annual tax return.

If you contribute the same total amount to a pre-tax 401(k) during the year, changing only the timing generally does not change your total annual federal taxable wages.

What changes during the year is the pattern of contributions, paycheck withholding, and cash flow.

For California residents, state income tax withholding may also change when pre-tax contributions stop.

See the IRS rules on retirement plan contributions and withholding.

3. How Maxing Out Early Can Cost You an Employer Match

Imagine two employees who earn the same salary and contribute the same $24,500 to their 401(k) accounts during 2026.

One spreads the contributions throughout the year.

The other reaches the limit several months early.

Both employees contribute exactly the same annual amount.

But depending on the employer’s matching formula, they may receive different employer contributions.

An Example: $1,200 in Potentially Missed Matching Contributions

Assume an employee has the following arrangement:

• Biweekly gross pay: $5,000
• Number of paychecks: 26
• Employer match: 100% of employee contributions up to 4% of each paycheck
• Maximum employer match per paycheck: $200

If the employee contributes at least $200 from every paycheck, the total annual employer match is:

26 paychecks × $200 = $5,200

Now suppose the employee contributes $1,225 per paycheck (24.5% of gross pay) for the first 20 paychecks.

After 20 paychecks, the employee has contributed:

20 × $1,225 = $24,500

The employee has reached the annual IRS limit, and employee elective deferrals stop for the remaining six paychecks.

Under a plan that calculates the match separately for each payroll period without an applicable annual reconciliation, the result could be:

• First 20 paychecks: $4,000 employer match
• Final 6 paychecks: $0 employer match
• Total employer match: $4,000

The difference is $1,200.

The employee still contributed the full $24,500. The potential loss came from the employer’s matching formula, not from exceeding or misunderstanding the IRS contribution limit.

This example assumes that the plan’s matching formula is based on each payroll period and does not require an additional annual adjustment.

4. What Is a Year-End True-Up?

A true-up is an additional employer matching contribution intended to reconcile the match already provided with the amount required under the applicable annual matching formula.

Suppose the employee in the previous example receives only $4,000 in matching contributions during the year.

If the employer’s plan provides for an annual matching calculation that entitles the employee to $5,200, the employer may need to contribute the remaining $1,200 through a year-end reconciliation.

But not every 401(k) plan provides an annual matching formula or true-up.

Some plans base matching contributions on each payroll period. Others use annual compensation and contributions to determine the final match.

The distinction is important because a payroll-based calculation is not always the final answer. If the written plan requires an annual match, calculating contributions paycheck by paycheck does not eliminate that obligation.

The plan document controls.

The relevant questions are:

1. Is the employer match calculated for each paycheck or for the entire plan year?
2. If the match is calculated each paycheck, does the plan require an annual reconciliation or true-up?
3. Are there eligibility, vesting, or other plan conditions that affect the final matching contribution?
4. When are any additional employer contributions calculated and deposited?

The Summary Plan Description (SPD) is usually a good starting point. If the matching provisions remain unclear, ask your Benefits team or plan administrator for the applicable plan terms.

The IRS specifically identifies incorrect matching calculations, including differences between payroll-period and annual calculations, as potential plan administration errors when the employer does not follow the plan’s written requirements.

See the IRS 401(k) matching contribution guidance and 401(k) Plan Fix-It Guide.

5. Should You Spread Your 401(k) Contributions Throughout the Year?

Not every employee needs to contribute evenly throughout the year.

If your employer calculates the match annually and makes the required annual adjustment, front-loading your contributions may not reduce your employer match.

But if your plan calculates matching contributions by paycheck without an applicable true-up, spreading contributions across the year may help preserve the full available match.

It can also make your monthly take-home pay more predictable.

Before setting your contribution percentage, consider the following.

First, check your employer’s matching formula.

Find out how much you need to contribute during each eligible payroll period to receive the maximum match.

Second, estimate your annual contributions.

Divide your planned annual employee contributions by the number of remaining paychecks.

If your goal is to contribute $24,500 over 26 equal pay periods, for example, that is approximately $942 per paycheck.

The actual percentage depends on your eligible compensation and how your payroll system handles contribution elections.

Third, account for bonuses and variable pay.

Some plans apply your elected contribution percentage to bonuses as well as regular wages.

A large bonus could cause you to reach the limit sooner than expected.

Fourth, review contributions from other employers.

If you changed jobs during the year, elective deferrals made to your previous employer’s 401(k) generally count toward the same annual employee deferral limit.

Your new employer’s payroll system may not know how much you already contributed elsewhere.

Finally, review your election before the first payroll of the year.

You do not necessarily need to make contributions in equal dollar amounts. The goal is to coordinate your annual savings target with your employer’s matching requirements and household cash flow.

6. Common Mistakes

Once I contribute $24,500, can my employer still contribute more?

Yes. The employee elective deferral limit and overall contribution limit are different. Employer matching contributions do not count toward the individual $24,500 limit.

If I max out my 401(k), does that mean I received the full employer match?

Not necessarily. The matching formula and contribution timing may affect the result. Reaching the IRS contribution limit does not guarantee that you received every available employer matching contribution.

Does every company make a year-end true-up?

No. The applicable matching and reconciliation requirements depend on the plan’s terms. Some plans calculate matches for each payroll period, while others require an annual calculation or adjustment.

If my paycheck goes up after I max out, does that mean my taxes went down?

Not necessarily. If pre-tax contributions stop, current taxable wages and income tax withholding generally increase. A larger paycheck does not automatically mean lower taxes.

Should I always contribute as quickly as possible?

Not always. Front-loading may be reasonable for some employees. For others, spreading contributions can protect the available employer match or make household budgeting easier.

The Key Distinction

1. The annual 401(k) employee contribution limit determines how much you can defer. It does not determine how your employer calculates matching contributions.
2. Reaching the limit early may increase take-home pay, but the tax effect depends on whether you made pre-tax or Roth contributions.
3. Before deciding how quickly to contribute, review the employer matching formula and any year-end true-up provisions.

The most useful contribution percentage is not necessarily the one that gets you to the IRS limit the fastest. It is the one that fits your savings goal, cash flow, and employer’s plan.

Reference

2026 Contribution Limits

IRS — Retirement Topics: 401(k) and Profit-Sharing Plan Contribution Limits

Explains the employee elective deferral limit, employer contributions, catch-up contributions, and overall annual additions limit.

IRS — Retirement Topics: Catch-Up Contributions

Explains additional contributions for older participants and the Roth catch-up rules beginning in 2026.

Pre-tax and Roth Contributions

IRS — Retirement Plan FAQs Regarding Contributions and Withholding

Explains federal income tax, Social Security, Medicare, and Form W-2 treatment of retirement plan contributions.

IRS — Retirement Plans FAQs on Designated Roth Accounts

Explains the tax treatment of designated Roth contributions and how they differ from pre-tax contributions.

Employer Matching and Plan Requirements

IRS — Matching Contributions Help You Save More for Retirement

Explains employer matching contributions and the importance of the plan document and Summary Plan Description.

IRS — 401(k) Plan Fix-It Guide: Employer Matching Contributions

Explains why matching contributions must be calculated in accordance with plan terms, including payroll-period and annual calculations.

U.S. Department of Labor — What You Should Know About Your Retirement Plan

Explains participants’ rights to review the Summary Plan Description and obtain information about employer retirement plans.

See This Rule in the Story

EP28 — The Bigger Paycheck

Evan notices that his paycheck is larger than usual. After checking his paystub, he realizes that his 401(k) contributions have stopped because he already reached the annual limit.

What first looks like extra spending money leads him to check whether stopping contributions early could affect his employer match.

The episode follows Evan and Daisy as they consider not only retirement contributions, but also the predictability of their household cash flow.