Understanding 401(k) Contribution Limits for 2024
A 401(k) is a retirement savings plan offered by many employers. Workers contribute money directly from their paychecks before taxes are taken out. The IRS sets yearly limits on how much you can add to your account. For 2024, employees can contribute up to $23,500 to a traditional or Roth 401(k). This limit applies to your combined contributions across all 401(k) plans you may participate in.
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If you are age 50 or older, you can make additional "catch-up" contributions. The catch-up limit for 2024 is $7,500, bringing your total possible contribution to $31,000. These higher limits exist because people closer to retirement often want to save more money in a shorter timeframe.
These contribution limits change periodically. The IRS adjusts them for inflation, usually in $500 increments. In 2023, the limit was $22,500, which means it increased by $1,000 in 2024. Checking the current year's limit is important before making your financial plans. The IRS website publishes these limits each October for the following year.
Your actual contribution amount may be lower than the IRS limit if your employer's plan has restrictions or if your income exceeds certain thresholds. Some plans also have their own contribution caps. Additionally, if you change jobs during the year, you can only contribute the annual limit across all your 401(k) accounts combined—you cannot contribute $23,500 to two different plans.
Practical takeaway: Review your current 401(k) plan documents or contact your employer's benefits department to learn your specific contribution limits. If you are age 50 or older, confirm whether your plan allows catch-up contributions and what the exact amount is.
How Employer Matching Works and What You Should Know
Many employers offer matching contributions as part of their 401(k) plans. This means the company adds money to your account based on how much you contribute. A common matching formula is 100% of the first 3% of your salary you contribute, or 50% of the first 6% you contribute. These formulas vary significantly between employers.
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For example, if you earn $50,000 annually and your employer matches 100% of the first 3% you contribute, the employer will add $1,500 to your account if you contribute $1,500 (3% of $50,000). If you contribute only $500, the employer matches only $500. However, if you contribute 5% ($2,500), the employer still only matches the first 3%, contributing $1,500.
Employer matching is essentially free money toward your retirement. It does not count toward your $23,500 annual contribution limit. The limit covers only your contributions. The employer's matching money is separate. This means you could theoretically contribute $23,500 of your own money and receive an additional employer match on top of that amount, though most employees do not contribute at such high levels.
Understanding your employer's matching formula matters for financial planning. If your employer offers a match but you do not contribute enough to receive it, you are leaving money on the table. Financial advisors often recommend contributing at least enough to capture the full employer match before prioritizing other financial goals. However, each person's situation is different, and you should consider your overall budget and financial needs.
Practical takeaway: Find your employer's matching formula in your benefits materials or from your HR department. Calculate what contribution level you need to reach to receive the full match, then consider whether your budget allows you to contribute at least that amount.
Traditional 401(k) vs. Roth 401(k) Tax Rules
Most workers have a choice between contributing to a traditional 401(k) or a Roth 401(k), assuming their employer offers both. The key difference is when you pay taxes on the money. Understanding this difference helps you make decisions about which option may work better for your situation.
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With a traditional 401(k), you contribute pre-tax dollars. This means the money comes out of your paycheck before income taxes are calculated, lowering your taxable income for that year. If you earn $60,000 and contribute $6,000 to a traditional 401(k), your taxable income becomes $54,000. You do not pay federal income taxes on that $6,000 in the year you contribute it. However, when you withdraw the money in retirement, you pay income taxes on the full amount withdrawn, including all the growth your investments earned over the years.
A Roth 401(k) works differently. You contribute after-tax dollars, meaning you pay income taxes on the money before it goes into the account. Your paycheck is reduced by $6,000, but you also owe taxes on that $6,000. The benefit comes later: when you withdraw money in retirement, you pay no federal income taxes on the withdrawal. This includes all the investment growth the money earned over decades. For many people, this can result in significant tax savings if they expect to be in a higher tax bracket in retirement.
The contribution limits are the same for both types—$23,500 in 2024 for those under 50. However, the combined limit applies to your total contributions to both types. If you contribute $15,000 to a traditional 401(k), you can contribute only $8,500 more to a Roth 401(k) that same year, not another full $23,500. There are also income limits on Roth 401(k)s in some cases, though these are higher than Roth IRA limits. Your employer will explain which options are available in your specific plan.
Practical takeaway: Consider your current tax bracket versus where you think you will be in retirement. If you expect to be in a lower tax bracket when retired, a traditional 401(k) may benefit you now. If you expect a higher tax bracket in retirement or want tax-free withdrawals, research whether a Roth option makes sense for your situation.
Required Minimum Distributions and Withdrawal Rules
At some point, the IRS requires you to withdraw money from your 401(k). These are called Required Minimum Distributions, or RMDs. Understanding when these withdrawals must begin and how they are calculated helps you plan for retirement income and tax obligations.
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As of 2023, RMDs must begin at age 73 for most people. The IRS changed this age from 72 due to the Secure Act 2.0, which took effect in 2023. If you already started taking RMDs before age 73, you continue with your current schedule. The age may increase further in future years as the law continues to change. This rule does not apply if you are still working and do not own more than 5% of the company sponsoring the plan, though this exception is less common.
The RMD amount is calculated using IRS life expectancy tables and the total value of your 401(k) account on December 31 of the prior year. The formula divides your account balance by a life expectancy factor. For example, if your account was worth $500,000 on December 31 and the IRS life expectancy factor is 25, your RMD would be $20,000 ($500,000 divided by 25). The exact factor depends on your age and marital status if your spouse is significantly younger.
If you do not take your full RMD, the IRS charges a penalty tax equal to 25% of the amount you failed to withdraw. This is in addition to income taxes owed on the withdrawal itself. As of 2024, the penalty reduced to 10% for certain situations, but 25% remains the standard penalty. You can take your RMD in a lump sum or spread it across the year in monthly or quarterly withdrawals. Working with a tax professional or your plan administrator can help ensure you meet these requirements.
Practical takeaway: Mark age 73 on your timeline and set a reminder to contact your plan administrator at least one year before you turn 73. Request information about calculating your RMD and the withdrawal options available to you.
Early Withdrawal Penalties and Exceptions
Generally, you cannot withdraw money from your 401(k) before age 59½ without paying a penalty. If you do, the IRS charges a