IRC Section 402(g): The Ultimate Guide to Your Retirement Contribution Limits

LEGAL DISCLAIMER: This article provides general, informational content for educational purposes only. It is not a substitute for professional legal advice from a qualified attorney or certified financial advisor. Always consult with a qualified professional for guidance on your specific financial and legal situation.

Imagine your retirement savings journey is a road trip on a major highway. You want to go as fast as you can to reach your destination—a comfortable retirement—as quickly as possible. The government, wanting to encourage this journey, gives you a special “HOV lane” in the form of tax-advantaged retirement accounts like a 401k_plan. But to keep things fair and manage tax revenue, the internal_revenue_service (IRS) posts a speed limit. irc_section_402g is that speed limit. It's the absolute maximum amount of money you, as an individual employee, are legally allowed to contribute from your own paycheck into these specific retirement plans in a single year. This isn't your employer's contribution or a limit on how much the account can grow. It's strictly about *your* personal contributions, which the law calls “elective deferrals.” Understanding this limit is crucial because breaking it, even accidentally, can lead to a nasty financial traffic ticket: double taxation and penalties. This guide is your GPS, designed to help you navigate the rules, maximize your savings without speeding, and handle any accidental detours along the way.

• Key Takeaways At-a-Glance:
• Your Personal Savings Cap: IRC Section 402(g) sets the annual dollar limit for your personal “elective deferral” contributions to employer-sponsored retirement plans like 401k_plans and 403b_plans.
• The Limit Follows You, Not the Job: The IRC Section 402(g) limit applies to you as an individual across all your jobs for the entire year; it is not a per-plan or per-employer limit.
• Accidents Have Consequences (But Can Be Fixed): Exceeding the IRC Section 402(g) limit can result in the excess amount being taxed twice if not corrected promptly through a process called a corrective_distribution.

The concept of saving for retirement through an employer is a relatively modern invention. For much of American history, retirement was funded by personal savings, family support, or pensions that were often unreliable. The landscape began to shift dramatically with the passage of the employee_retirement_income_security_act_of_1974, better known as ERISA. This landmark law was enacted to protect employees' pension and retirement benefits from mismanagement and abuse. It set standards for how plans were administered but didn't create the popular 401(k) we know today. The real birth of the modern contribution-based retirement plan came from a quirk in the tax code. In 1978, Congress passed the Revenue Act, which included a provision, Section 401(k), that allowed employees to defer a portion of their salary without it being taxed at that moment. Initially, its power wasn't fully understood. But soon, benefits consultants realized this could be a powerful savings tool. By the mid-1980s, 401(k) plans were exploding in popularity. Lawmakers grew concerned about two things: the potential for massive tax revenue loss if high-earners deferred unlimited amounts of income, and ensuring that these plans didn't disproportionately benefit the wealthy. This led to the tax_reform_act_of_1986, a sweeping overhaul of the U.S. tax code. It was this act that formally introduced the strict annual dollar limit on employee elective deferrals, which we now know as the rule codified in IRC Section 402(g). The goal was to balance encouraging retirement savings with maintaining tax fairness and revenue. Since then, the 402(g) limit has been a central feature of retirement planning, with the limit now indexed to inflation to reflect the rising cost of living.

The core of the law is found in the internal_revenue_code (IRC), which is the body of federal statutory tax law in the United States. Specifically, Section 402(g)(1)(A) states:

“the elective deferrals of any individual for any taxable year shall be included in such individual’s gross income to the extent the amount of such deferrals for the taxable year exceeds the applicable limit for such taxable year.”

Plain-Language Explanation: This legal-ese has a very simple meaning. The government says, “We will give you a tax break on the money you save for retirement, but only up to a certain amount each year.” If you contribute more than that “applicable limit” from your own paycheck, that extra money (the excess) is immediately considered part of your taxable_income for that year, even if it’s sitting in your retirement account. This is the first layer of taxation on an excess contribution.

A common point of confusion is which retirement accounts fall under the 402(g) umbrella. The limit applies specifically to your elective deferrals—the money you choose to have taken out of your paycheck. It does not apply to Individual Retirement Accounts (IRAs) or employer contributions. Here's a breakdown of how the 402(g) limit applies to common retirement plans:

To truly master this rule, you need to understand its four key components.

This is the official term for the contributions you, the employee, choose to make from your salary. It's the core of what 402(g) regulates.

• What counts? Any money deducted from your paycheck and deposited into a qualified retirement plan at your direction.
• Pre-Tax vs. Roth: This is a critical point. The 402(g) limit applies to the total of your elective deferrals, regardless of their tax treatment.
  • Pre-Tax (Traditional) Deferrals: These are contributions made before income taxes are calculated, reducing your current taxable_income.
  • Roth Deferrals: These are contributions made after income taxes are calculated. They don't reduce your current tax bill, but qualified withdrawals in retirement are tax-free.
  • Example: If the 402(g) limit is $23,000, you could contribute $15,000 to your Traditional 401(k) and $8,000 to your Roth 401(k). You have hit your total limit. You cannot contribute $23,000 to each.

The IRS announces the 402(g) limit for the upcoming year, usually in the fall. This limit is subject to a cost-of-living adjustment (COLA), so it typically increases over time.

• Historical 402(g) Limits Table

^ Year ^ 402(g) Limit ^

It is your responsibility to know the limit for the current tax year and manage your contributions accordingly.

This is arguably the most important and misunderstood part of Section 402(g). The limit is per taxpayer, not per plan or per employer.

• What it means: If you have two jobs during the year, both with 401(k) plans, you cannot contribute the maximum amount to each plan. You must add up your contributions from all sources subject to 402(g), and the grand total cannot exceed the single annual limit.
• Hypothetical Example: Sarah works for Company A from January to June and contributes $15,000 to its 401(k). In July, she switches to Company B. Sarah must inform Company B's payroll department that she has already contributed $15,000 this year. If the annual limit is $23,000, she can only contribute an additional $8,000 to Company B's plan for the rest of the year. If she simply sets her contribution percentage and forgets, she could easily and accidentally exceed the limit.

To help older workers accelerate their retirement savings, Congress created a special provision known as the catch-up contribution. This is governed by irc_section_414v.

• Who is eligible? Anyone who will be age 50 or older by the end of the calendar year.
• How it works: Eligible individuals can contribute an additional amount above the standard 402(g) limit. This catch-up limit is also set by the IRS and adjusted for inflation. For example, in 2024, the catch-up limit was $7,500.
• Combined Limit: This means a person age 50 or over in 2024 could contribute a total of $30,500 ($23,000 regular limit + $7,500 catch-up).
• Important: This is a separate limit. You must first “fill up” the regular 402(g) bucket before any contributions count as catch-up. Most payroll systems handle this automatically, but it's good to understand the mechanics.

Discovering you've contributed too much can be stressful, but there's a clear process to fix it. Acting quickly is key to minimizing the financial damage.

First, confirm the over-contribution.

1. Review Your Pay Stubs: Look at the year-to-date (YTD) retirement contribution amounts on your final pay stub of the year. If you had multiple jobs, you need to add the YTD figures from each employer together.
2. Check Your Form W-2: In January, you'll receive a form_w2 from each employer. Look at Box 12. The amount of your elective deferrals will be listed there with a code (e.g., Code D for 401(k), Code E for 403(b)). Add up the amounts from Box 12 for all relevant W-2s.
3. Calculate the Excess: Subtract the annual 402(g) limit from your total contribution amount. The result is your “excess deferral.”

You must contact your plan administrator(s) to request a “corrective distribution.”

1. Which Plan to Contact? You can request the refund from any of the plans you contributed to during the year. It's often easiest to request it from your current employer's plan.
2. The Deadline is Crucial: You must notify the plan and request the distribution by April 15th of the year following the over-contribution. This deadline is firm. For example, for an over-contribution in 2024, you must request the fix by April 15, 2025.

Your plan administrator will have a specific process for this.

1. Fill Out the Paperwork: You will likely need to complete a “Distribution of Excess Deferral” form or a similar document.
2. Include Earnings: The distribution must include not only the excess contribution itself but also any earnings (or losses) that amount generated while it was in your account. The plan administrator will calculate this for you. This is called “income attributable to the excess.”

How you are taxed depends entirely on whether you meet the April 15th deadline.

• If Corrected BEFORE the Deadline:
  • The excess deferral amount is added back to your taxable_income for the year you made the contribution (the “over-contribution year”).
  • The *earnings* on that excess are taxed as income in the year you receive the distribution (the “correction year”).
  • Result: You avoid the dreaded double taxation. It's a clean fix.
• If NOT Corrected BEFORE the Deadline:
  • The excess deferral is taxed in the year you contributed it.
  • The excess deferral remains in your account and is taxed *again* when you eventually withdraw it in retirement.
  • Result: Double taxation. This is the penalty for not fixing the error on time. This is a costly mistake you want to avoid at all costs.

The paperwork you receive is critical for tax filing.

1. You will receive a form_1099r from your plan administrator for the corrective distribution.
2. If you took out the excess and the earnings in the same year as the over-contribution, the form will have a distribution code of “8”. This tells the IRS you made a timely correction.
3. If you took out the excess in the year *after* the over-contribution (but still before the deadline), the form will have a code of “P”.
4. You must report this information correctly on your form_1040 tax return to show the IRS you have resolved the issue.

• form_w2 (Wage and Tax Statement): Your primary tool for identifying a potential over-contribution. Box 12, Codes D, E, F, G, H, and S show your total elective deferrals to various plan types.
• form_1099r (Distributions From Pensions, Annuities, etc.): This is the form you'll receive after taking a corrective distribution. It's proof for the IRS that you fixed the error. Pay close attention to the amount in Box 1 and the distribution code in Box 7.
• Corrective Distribution Request Form: This is not a government form but an internal document provided by your plan's administrator (e.g., Fidelity, Vanguard). It's the official request you must submit to start the correction process.

This is the number one cause of accidental 402(g) violations.

• The Trap: When you start a new job, the new company's payroll system has no idea what you contributed at your old job. If you set your contribution to, say, 10% of your salary at both jobs, you can easily exceed the annual limit without realizing it until it's too late.
• The Solution: Be proactive. When you start a new job, immediately calculate your YTD contributions from your old job. Provide this information to your new HR or payroll department, or manually adjust your contribution percentage to ensure your total for the year stays under the limit.

This is a major source of confusion. They are two separate and independent limits that apply to the same retirement account.

You could hit your 402(g) limit without hitting the 415© limit, or vice-versa (though the latter is less common). They are separate calculations.

No. The 402(g) limit is “tax-agnostic.” It does not care whether your contributions are Traditional (pre-tax) or Roth (after-tax). It only cares about the total dollar amount you defer from your paycheck. An employee contributing entirely to a Roth 401(k) is subject to the exact same dollar limit as an employee contributing entirely to a Traditional 401(k).

While you are ultimately responsible for tracking your 402(g) limit, sometimes a payroll error can cause an over-contribution. If your employer allowed contributions beyond the legal limit (e.g., due to a system glitch), the correction process is slightly different. The plan may need to return the excess funds and the employer may have to make corrective contributions to other employees. If you believe this is the case, document everything and speak with your plan administrator and an HR representative immediately.

The rules around retirement savings are constantly evolving. The passage of the secure_act_2.0 has brought significant changes, including new rules for catch-up contributions. One provision, set to take effect in the future, will require all catch-up contributions for high-earners (those making over $145,000) to be made on a Roth (after-tax) basis. This is controversial; proponents argue it creates more tax revenue now, while opponents argue it might discourage some from making catch-up contributions at all. There are also ongoing debates about whether the current annual limits are sufficient for Americans to save enough for a secure retirement, especially with rising healthcare costs and longer life expectancies.

The rise of the “gig economy” and freelance work presents a major challenge to the traditional employer-centric 402(g) framework. A person with three part-time jobs and a freelance side-hustle has a much harder time tracking their total contributions than a traditional single-employer worker. This complexity could lead to more accidental over-contributions. In response, we are seeing the growth of fintech apps and services designed to give individuals a holistic view of their finances, including tracking retirement contributions across multiple accounts. In the future, we may see legislative proposals for “auto-portability” of retirement accounts or technology that allows payroll providers to “talk” to each other to prevent 402(g) excesses before they happen.

• 401k_plan: An employer-sponsored retirement plan allowing employees to save and invest a portion of their paycheck before taxes are taken out.
• 403b_plan: A retirement plan similar to a 401(k), but for employees of public schools and non-profit organizations.
• catch_up_contribution: An additional contribution amount allowed for individuals age 50 and over, on top of the standard 402(g) limit.
• corrective_distribution: The process of withdrawing excess deferrals and their earnings from a retirement plan to fix an over-contribution.
• elective_deferral: The portion of an employee's salary they choose to contribute to a retirement plan.
• employee_retirement_income_security_act_of_1974: A federal law that sets minimum standards for most voluntarily established retirement and health plans in private industry.
• excess_deferral: The amount of elective deferrals contributed by an employee that is over the annual 402(g) limit.
• form_1099r: An IRS tax form used to report distributions from retirement plans.
• form_w2: An IRS tax form used to report an employee's annual wages and the amount of taxes withheld.
• internal_revenue_code: The main body of domestic statutory tax law of the United States.
• internal_revenue_service: The U.S. government agency responsible for tax collection and tax law enforcement.
• irc_section_415c: The section of the IRC that sets the overall limit on total annual additions (employee + employer) to a retirement plan.
• roth_contribution: A retirement plan contribution made with after-tax dollars, allowing for tax-free withdrawals in retirement.
• taxable_income: The portion of an individual's gross income that is subject to taxation.

• 401k_plan
• roth_401k
• employee_retirement_income_security_act_of_1974
• secure_act_2.0
• tax_fraud
• individual_retirement_account
• internal_revenue_service