What are the 2026 401(k) contribution limits?
The IRS sets an annual employee elective deferral limit for 401(k) plans, along with a separate catch-up contribution limit for participants age 50 and older, and both are typically adjusted for inflation each year. There is also an overall combined limit that includes employer contributions.
Because these limits are finalized by the IRS shortly before or during the relevant tax year, use the structure below as a guide and confirm the exact 2026 dollar limits at IRS.gov before finalizing your contribution elections.
| Limit type | Who it applies to | General structure |
|---|---|---|
| Employee elective deferral limit | All eligible participants under age 50 | Annual limit, inflation-adjusted from 2025 |
| Catch-up contribution | Participants age 50 and older | Additional amount on top of the base limit |
| Enhanced catch-up (ages 60–63) | Participants aged 60–63 under SECURE 2.0 provisions | Higher catch-up amount than standard age-50 catch-up |
| Overall combined limit (employee + employer) | All participants | Higher combined cap including employer contributions |
How does employer matching affect my 401(k) growth?
Many employers match a portion of employee contributions, commonly structured as a percentage match up to a certain percentage of salary (for example, matching 50% of contributions up to 6% of pay). This match is effectively additional compensation and can significantly accelerate your account growth over time.
Not contributing enough to receive your full employer match is often described by financial professionals as leaving free money on the table, since the match is not counted against your own elective deferral limit in the same way (though it does count toward the overall combined limit).
How is this calculated? What formula does the 401(k) projection use?
How is this calculated? Taxcentra's 401(k) calculator projects your balance using a year-by-year compounding model. Starting with your current 401(k) balance, it adds your annual employee contribution plus any employer match for that year, then applies your assumed annual rate of return to the total, repeating this process for each year until your target retirement age.
In formula form: end-of-year balance = (start-of-year balance + annual employee contribution + annual employer match) × (1 + assumed annual return). This compounding effect means contributions made earlier in your career generally have more time to grow than contributions made later, even if the total dollar amount contributed is the same.
The projection does not account for investment fees, changes in your salary or contribution percentage over time, market volatility, or the specific tax treatment of traditional versus Roth contributions. It's meant to illustrate general growth potential rather than predict your exact future balance.
What's the difference between traditional and Roth 401(k) contributions?
Traditional 401(k) contributions are made pre-tax, reducing your current taxable income, but withdrawals in retirement are taxed as ordinary income. Roth 401(k) contributions are made with after-tax dollars, so they don't reduce current taxable income, but qualified withdrawals in retirement are generally tax-free.
The better choice often depends on whether you expect to be in a higher or lower tax bracket in retirement compared to now, among other factors. Many savers split contributions between both types, and some employer plans allow both traditional and Roth options within the same account.
How much should I contribute to my 401(k) in 2026?
A commonly cited starting point is to contribute at least enough to receive your full employer match, since that's generally considered an immediate, guaranteed return on your contribution. Beyond that, many financial professionals suggest working toward a total savings rate (including any match) in a range often cited as 10% to 15% of income or more, depending on your age and retirement timeline.
The table below illustrates how different contribution percentages might affect a hypothetical annual contribution amount, purely for comparison purposes.
| Employee contribution rate | Annual employee contribution | Illustrative purpose |
|---|---|---|
| 3% | $2,250 | Often the minimum needed to capture a partial employer match |
| 6% | $4,500 | Common threshold for receiving a full employer match in many plans |
| 10% | $7,500 | Often cited as part of a broader long-term savings target |
| 15% | $11,250 | Higher savings rate, may approach or reach annual deferral limits with match |
What happens to my 401(k) if I change jobs?
When you leave an employer, you generally have several options for your 401(k) balance: leave it in the former employer's plan if allowed, roll it over into your new employer's plan, roll it over into an Individual Retirement Account (IRA), or cash it out (which typically triggers taxes and, if you're under 59½, an early withdrawal penalty).
Rolling over funds directly between qualified retirement accounts generally avoids taxes and penalties, while cashing out is usually the least favorable option from a long-term savings perspective. Vesting schedules for employer matching contributions can also affect how much of the match you keep if you leave before becoming fully vested.
What are common 401(k) planning mistakes to avoid?
Common mistakes include not contributing enough to get the full employer match, cashing out a 401(k) when changing jobs instead of rolling it over, not increasing contributions as income grows, and not periodically reviewing investment allocations within the plan.
Another common issue is underestimating how much catch-up contributions can help savers closer to retirement age make up for years of lower savings earlier in their careers, particularly under the enhanced catch-up provisions available to certain age groups.