What Are Contribution Limits and Why Do They Matter?
The IRS sets annual caps on how much money you can contribute to tax-advantaged retirement accounts like 401(k)s and IRAs. These limits change periodically to reflect inflation. Staying within them is required - contributions above the limit trigger tax penalties.
Understanding these numbers matters for one practical reason: every dollar you contribute below the limit is a missed opportunity to grow wealth in a tax-sheltered environment. If you're new to retirement saving, see Retirement Accounts Explained for a plain-language overview of how each account type works before diving into the numbers below.
| 401(k) employee limit (2024) | $23,000 (IRS Notice 2023-75) |
| 401(k) catch-up (age 50+, 2024) | $7,500 (IRS Notice 2023-75) |
| IRA / Roth IRA limit (2024) | $7,000 (IRS Notice 2023-75) |
| IRA catch-up (age 50+, 2024) | $1,000 (IRS Notice 2023-75) |
| Roth IRA phase-out - single filers | Begins at $146,000 (IRS Notice 2023-75) |
| Roth IRA phase-out - married filing jointly | Begins at $230,000 (IRS Notice 2023-75) |
| 401(k) combined limit (employee + employer, 2024) | $69,000 (IRS Notice 2023-75) |
401(k) Contribution Limits at a Glance
A 401(k) is an employer-sponsored retirement plan that lets you contribute a portion of your paycheck before taxes are taken out. For 2024, the employee contribution limit is $23,000. If you are age 50 or older, you may contribute an additional $7,500 in catch-up contributions, bringing your total to $30,500.
These limits apply to your employee contributions only. Your employer's matching contributions do not count against your personal limit. The combined total from both you and your employer cannot exceed $69,000 for 2024 (or $76,500 if you're 50 or older).
To learn more about how catch-up contributions work in practice, see what the age-50 contribution limit increase actually allows.
Contribution limit
The maximum dollar amount the IRS allows you to add to a tax-advantaged retirement account in a single calendar year. Exceeding this limit typically results in a 6% excise tax on the excess amount.
Catch-up contribution
An extra contribution allowed for savers aged 50 and older, on top of the standard annual limit. It's designed to help those closer to retirement accelerate their savings.
Traditional IRA
An Individual Retirement Account funded with pre-tax or after-tax dollars, depending on your situation. Earnings grow tax-deferred, and withdrawals in retirement are taxed as ordinary income.
Roth IRA
An IRA funded with after-tax dollars. Qualified withdrawals in retirement - including all earnings - are generally tax-free, making it valuable for those expecting higher income later in life.
Phase-out range
An income range within which your ability to contribute to or deduct a retirement account is gradually reduced. Once your income exceeds the top of the range, eligibility is eliminated entirely.
Employer match
A contribution your employer makes to your 401(k), typically as a percentage of what you contribute. This does not count against your personal employee contribution limit.
IRA and Roth IRA Limits: Simpler, but With Strings Attached
Individual Retirement Accounts (IRAs) - both traditional and Roth - share the same annual contribution limit: $7,000 for 2024, plus a $1,000 catch-up if you are 50 or older. That $8,000 is a combined ceiling across all your IRAs - you cannot contribute $7,000 to a traditional IRA and $7,000 to a Roth IRA in the same year.
There is an important distinction with Roth IRAs: your ability to contribute phases out at higher income levels. For 2024, the phase-out range begins at $146,000 for single filers and $230,000 for married couples filing jointly. Above those thresholds, your allowed Roth IRA contribution gradually reduces to zero.
Traditional IRAs don't have income-based contribution limits, though your ability to deduct the contribution on your taxes does depend on your income and whether you have access to a workplace plan. For a deeper look at how Roth accounts work, visit Roth IRA Fundamentals.
This article provides general financial education and is not personalized tax or investment advice. Contribution limits and phase-out ranges are subject to IRS updates. Consult a qualified financial advisor or tax professional for guidance specific to your situation.
