401(k) Contribution Limit History

Jessie · Last updated: May 8, 2026

Last verified: May 9, 2026 against IRS Notice 2025-67 + historical IRS guidance

From the desk of Jessie: ex-MBB consultant, writes the editorial here. See more by Jessie.

Annual 401(k) employee deferral limit from $7,000 in 1987 to $23,500 in 2026, with EGTRRA acceleration, catch-up introduction, and SECURE 2.0 changes annotated.

Sources: IRS Notice releases each fall, EBRI Issue Briefs, Plan Sponsor Council of America, Internal Revenue Code legislative history.

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401(k) employee deferral limit (under age 50), 1987-2026
$0 $5.2k $10k $16k $21k $26k 1987 2000 2010 2020 2026 Employee deferral limit (USD) 1987 2002 2002 2006 2023 2025 1987: $7.0k 1988: $7.3k 1989: $7.6k 1990: $8.0k 1991: $8.5k 1992: $8.7k 1993: $9.0k 1994: $9.2k 1995: $9.2k 1996: $9.5k 1997: $9.5k 1998: $10k 1999: $10k 2000: $11k 2001: $11k 2002: $11k 2003: $12k 2004: $13k 2005: $14k 2006: $15k 2007: $16k 2008: $16k 2009: $17k 2010: $17k 2011: $17k 2012: $17k 2013: $18k 2014: $18k 2015: $18k 2016: $18k 2017: $18k 2018: $19k 2019: $19k 2020: $20k 2021: $20k 2022: $21k 2023: $23k 2024: $23k 2025: $24k 2026: $24k 2026: $23,500
Tap or hover an event marker at the top of the chart to read the legislation summary. Data points show the top marginal rate for each year shown.
$7,000
1987 origin
First indexed limit set by TRA86. Roughly $19,000 in 2026 dollars.
$23,500
2026 limit
Plus $7,500 catch-up at 50+, plus $3,750 super catch-up at 60-63.
$70,000
Section 415 cap
Total cap on employee + employer + after-tax contributions in 2026. Determines mega backdoor Roth capacity.
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The major changes

The 401(k) limit has been shaped by four major pieces of legislation: TRA86 (origin), EGTRRA (acceleration), PPA (auto-enrollment), and SECURE 2.0 (catch-up changes). Below are the milestones.

1978

Section 401(k) of the Revenue Act of 1978 - the original provision

The Revenue Act of 1978 added Section 401(k) to the Internal Revenue Code, allowing employees to defer compensation pre-tax. Plan adoption took several years - the first wave of corporate 401(k) plans launched in 1981 (Johnson Companies is generally credited with the first plan) after IRS issued proposed regulations clarifying that employee deferrals would qualify for tax deferral.

1986

TRA86 sets the modern limit structure

Before TRA86, 401(k) deferrals were governed by ad-hoc rules and a $30,000 combined-contribution limit. The Tax Reform Act of 1986 established the $7,000 employee deferral cap that took effect in 1987, with annual inflation indexation from 1988 forward. TRA86 also required nondiscrimination testing (the ADP/ACP tests) to prevent plans from disproportionately benefiting highly-compensated employees.

2002

EGTRRA - accelerated limit increases

The Economic Growth and Tax Relief Reconciliation Act of 2001 (EGTRRA) accelerated the deferral limit through a fixed schedule: $11,000 in 2002, $12,000 in 2003, $13,000 in 2004, $14,000 in 2005, and $15,000 in 2006, after which the limit returned to inflation indexation. EGTRRA also introduced catch-up contributions for participants age 50+ - $1,000 in 2002 rising to $5,000 by 2006.

2006

Pension Protection Act

The Pension Protection Act of 2006 made permanent the EGTRRA changes (which were originally scheduled to sunset in 2010). PPA also encouraged automatic enrollment, default investment options (the default became a target-date fund), and automatic contribution escalation. These three changes are the structural drivers of the modern 401(k) participation rate, which exceeds 80% in plans with auto-enrollment versus roughly 60% in opt-in plans.

2019

SECURE Act

The Setting Every Community Up for Retirement Enhancement (SECURE) Act of 2019 raised the RMD age from 70.5 to 72, allowed lifetime income annuities in 401(k) plans, opened plan participation to long-term part-time workers, and required employers to provide retirement-income illustrations on 401(k) statements.

2023

SECURE 2.0 Act

SECURE 2.0 (passed late December 2022, effective 2023+) introduced multiple 401(k) changes. It raised the RMD age again (to 73 in 2023, 75 in 2033), created the "super catch-up" for ages 60-63 taking effect in 2025 ($3,750 above the standard catch-up), and required catch-up contributions to go to the Roth bucket for high earners (over $145K W-2 wages, indexed) starting in 2026 (Section 603). It also mandated automatic enrollment for new 401(k) plans starting 2025 with default contribution rates between 3% and 10% and 1% annual auto-escalation up to at least 10%.

2026

Where the limit stands today

The 2026 employee deferral limit is $23,500 ($31,000 with the age-50 catch-up; $34,750 with the age 60-63 super catch-up). The Section 415 combined limit for 2026 is $70,000, which caps employer + employee + after-tax contributions combined and effectively determines mega backdoor Roth capacity. The next IRS Notice (typically released in November) will set the 2027 limit; based on chained CPI growth of 2.5-3%, expect a step to $24,000.

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Things you might not know

  • The 401(k) was a side effect of executive deferred-compensation rules. The Section 401(k) provision was originally drafted to clarify the tax treatment of cash-or-deferred arrangements (CODAs) used by executives. Ted Benna at the Johnson Companies pioneered using it as a broad-based employee benefit in 1981.
  • The IRS Notice cadence is tight. The IRS publishes the next year's contribution limits each fall (typically October or November) under the Notice series. The 2027 limit will likely be announced in late October 2026.
  • Catch-up contributions don't count toward the Section 415 limit. The age-50 catch-up ($7,500 in 2026) is on top of the $70,000 combined cap, not within it. So a 50+ employee at a generous-match employer can contribute $77,500 across all sources.
  • The mega backdoor Roth depends on plan support, not law. The mega backdoor strategy (after-tax contributions plus in-plan Roth conversion) is legal under existing rules, but only some plans support it. Roughly 25-30% of large 401(k) plans currently allow it (per Vanguard's How America Saves report).
  • The 2023 jump was the largest single-year increase since EGTRRA. The limit went from $20,500 in 2022 to $22,500 in 2023 - a $2,000 step driven by post-pandemic inflation. Most years see $500 increments.

Frequently Asked Questions

What is the 2026 401(k) contribution limit?
The 2026 employee deferral limit is $23,500 for participants under age 50. The age-50 catch-up adds $7,500 (total $31,000). The SECURE 2.0 super catch-up for ages 60-63 adds another $3,750 above the regular catch-up (total $34,750 for that narrow age window). The combined Section 415 limit for 2026 is $70,000, which caps employer + employee + after-tax contributions and determines mega backdoor Roth capacity.
When did 401(k) catch-up contributions start?
Catch-up contributions for participants age 50+ were introduced by EGTRRA in 2002. The initial catch-up was $1,000 in 2002, increasing to $5,000 by 2006. The catch-up amount is separately inflation-indexed and reached $7,500 in 2024 and 2026. SECURE 2.0 added a 'super catch-up' for ages 60-63 starting in 2025 ($3,750 above the regular catch-up).
How fast has the 401(k) limit grown historically?
The limit has grown roughly 4x in nominal dollars from 1987 ($7,000) to 2026 ($23,500). Adjusted for inflation, the real growth is about 2.5x. The largest single-year jumps were during EGTRRA's accelerated schedule (2002-2006: $1,000-$2,000 per year) and the post-pandemic inflation-driven adjustment in 2023 ($2,000 increase from $20,500 to $22,500). Most years see a $500 step.
What's the difference between the deferral limit and the Section 415 limit?
The deferral limit ($23,500 in 2026) caps your own pre-tax or Roth contributions through payroll. The Section 415 limit ($70,000 in 2026) caps total contributions across all sources: employee deferral + employer match + employer profit sharing + after-tax contributions. The gap between $23,500 and $70,000 is what makes the mega backdoor Roth strategy possible: contribute $23,500 pre-tax or Roth, plus employer match (varies), plus the difference up to $70,000 as after-tax contributions converted in-plan to Roth.
What happens to my catch-up contributions if I'm a high earner under SECURE 2.0?
Starting in 2026, SECURE 2.0 Section 603 requires that catch-up contributions for participants whose prior-year W-2 wages exceeded $145,000 (indexed) must be made to the Roth (after-tax) bucket of the 401(k) rather than the pre-tax bucket. This eliminates the upfront federal tax deduction on catch-up contributions for many high earners. Plans that don't offer Roth catch-up may not be able to allow any catch-up contributions for these participants, so most large plans added Roth catch-up support in 2025-2026.
Are 401(k) limits set per account or per person?
The deferral limit is per person, aggregated across all 401(k) plans. If you have two jobs each with a 401(k), your combined deferrals to both plans cannot exceed $23,500 in 2026 (or $31,000 with catch-up). The Section 415 limit, by contrast, is per plan: an employer can contribute up to the $70,000 limit to each of multiple plans, which matters most for sole-proprietor plans with both an employer and employee 401(k).

To project your balance against today's $23,500 limit and the SECURE 2.0 super catch-up, use our 401(k) calculator. For the broader retirement picture, the retirement calculator stitches together accumulation and drawdown. For sources and update cadence, see our methodology.

Related Calculators

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Roth vs. Traditional comparison with MAGI phaseouts and 5-year rules.

Retirement Calculator

Accumulation and drawdown projections with inflation-adjusted withdrawals.

2026 401(k) Contribution Limits

Current-year reference for limits, catch-up, and mega backdoor Roth.
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