401k Statistics 2026: Plans, Balances, and Participation

401k statistics: the short version

401k statistics can look contradictory because the sources measure different things. ICI measures the whole market. Fidelity and Vanguard measure participants on their own workplace platforms. BLS measures access and participation among workers. IRS data explains the legal contribution limits.

Taken together, the current picture is clear: the 401(k) system is huge, uneven, and still highly dependent on workplace access. ICI estimated $9.9 trillion in 401(k) assets at the end of Q1 2026. Fidelity put the average 401(k) balance on its platform at $141,000 in Q1 2026. BLS found that 65% of civilian workers had access to a defined contribution plan in March 2025, but only 45% participated.

Use this page as a citable reference for 401k statistics, 401k participation statistics, and 401k by age data. It is informational only and is not investment, tax, or legal advice. For product-level options, see our guide to best 401(k) plans.

How big is the 401(k) market?

The 401(k) market is one of the largest pools of household retirement wealth in the United States. ICI estimated $9.9 trillion in 401(k) plan assets as of March 31, 2026. That sits inside $13.8 trillion in all employer-based defined contribution assets and $47.6 trillion in total U.S. retirement assets.

The same ICI release said retirement assets represented 34% of all household financial assets in the United States at the end of Q1 2026. Mutual funds managed $5.7 trillion, or 58%, of 401(k) assets. Equity funds were the largest fund category inside 401(k)s, with $3.3 trillion, followed by hybrid funds at $1.6 trillion.

ICI's 401(k) resource hub gives a broader participant count: as of September 2025, Americans held about $10.0 trillion in 401(k) plans across about 730,000 plans, serving about 70 million active participants plus millions of retirees. That is why 401(k) data matters beyond retirement nerds. It is a core piece of the U.S. household balance sheet.

401k participation statistics

401k participation statistics depend on whether you are looking at all workers, private-sector workers, eligible participants inside plans, or a recordkeeper's own plan universe.

BLS is the cleanest source for worker access. In March 2025, 65% of civilian workers had access to a defined contribution plan and 45% participated. Among private industry workers, access was 70% and participation was 50%. State and local government workers were much more likely to have defined benefit access, but defined contribution access was only 38% and participation was 19%.

Vanguard looks inside plans that already exist. Its 2026 How America Saves page says average overall plan participation grew to 86%. That is not a contradiction. BLS starts with workers. Vanguard starts with workers in Vanguard-administered plans.

If you are comparing your own plan, the first practical question is whether your employer offers a match and automatic features. If you are evaluating plan providers or small-business options, our best 401(k) plans page is the better next step.

401k by age data

The best current 401k by age data comes from Fidelity's workplace-plan dataset, which covered 26,800 corporate defined contribution plans and 25.6 million participants as of March 31, 2026.

The pattern is exactly what you would expect, but the numbers still matter. Younger workers have smaller balances because they have had less time to contribute and compound. Balances rise through the 50s, then flatten in the 60s as some participants retire, roll money into IRAs, or start withdrawals.

Do not read these balances as targets. They are averages from one platform, not a retirement prescription. A worker with irregular access, student loans, caregiving breaks, or no employer match can be in a very different place. The better question is whether your savings rate, investment costs, and asset mix fit your plan. For basics on low-cost diversified investing, see our guide to index funds.

401(k) savings rates and 2026 contribution limits

Fidelity's Q1 2026 analysis reported a record 14.4% average total 401(k) savings rate. That was made up of a 9.6% average employee contribution rate and a 4.8% average employer contribution rate. The same update said 18% of 401(k) participants increased their savings rate during Q1, while only 5.7% changed their asset allocation.

The legal ceiling is much higher than the average worker contribution. For 2026, the IRS employee deferral limit is $24,500 for 401(k), 403(b), most 457 plans, and the federal Thrift Savings Plan. The standard catch-up limit is $8,000 for age 50 and older. A higher $11,250 catch-up applies for employees ages 60, 61, 62, and 63, if the plan allows it. The combined employee and employer annual addition limit is $72,000 for most workers under 50.

The gap between the average savings rate and the legal max is important. Most people are not maxing out. For many households, getting the full employer match, avoiding high-cost debt, and keeping an emergency fund matter more than chasing the absolute IRS ceiling. If your plan permits borrowing, understand the tradeoffs first by reading our guide to 401(k) loans.

Plan design trends: automatic enrollment, target-date funds, and matches

Plan design changes who participates. Vanguard's 2026 How America Saves page highlights several plan-design milestones: average overall participation grew to 86%, 69% of participants were in a professionally managed allocation, 61% of plans had automatic enrollment, and 96% of plans offered target-date funds.

ICI's March 2026 release on large 401(k) plans adds a second angle. In 2023, 43% of large 401(k) plans reported automatic enrollment. Employers made contributions in 91% of large 401(k) plans, and 94% of large-plan participants were in plans with employer contributions. Employer money represented $181 billion, or 35%, of employer and employee contributions flowing into those large plans.

For a worker, the boring plan features often matter more than the hot fund. Automatic enrollment gets you started. Auto-increase nudges your rate higher. A target-date or managed allocation can prevent abandoned cash or random fund picking. Low-cost funds keep more of the return in your account. If you are comparing fund types outside a plan, our ETF vs mutual fund vs index fund guide explains the basic differences.

Loans, hardship withdrawals, and leakage

A 401(k) balance is not locked in amber. Participants can borrow from some plans, take hardship withdrawals if they qualify, roll old accounts to an IRA, cash out when changing jobs, or leave money behind in an old plan. That movement is one reason 401(k) statistics never tell the full retirement story by themselves.

Vanguard's 2026 report received attention because account balances hit record levels in 2025, but hardship withdrawals also rose. Public coverage of the report noted that 6% of workers took a hardship withdrawal in 2025, with a median withdrawal around $1,900, and that plan loans were used by about 13% of participants. Treat those numbers as plan-recordkeeper data, not a universal worker census.

The practical point is simpler than the exact leakage rate. Money that leaves a 401(k) early can lose tax-deferred growth, and a loan can become taxable if you leave your job and do not repay under plan rules. If an old workplace plan is becoming hard to manage, comparing IRA accounts may make sense before you cash out.

State and access gaps

There is no single official federal table that gives current 401(k) balances for every state. The more useful state-level issue is access. A worker cannot contribute to a 401(k) if no plan is offered at work.

BLS shows the worker-access gap by sector and region. In March 2025, defined contribution access was 70% in private industry, but participation was 50%. Establishment size mattered: all-retirement-benefit access was 61% for workers at establishments with 1 to 99 workers, compared with 89% for workers at establishments with 100 or more workers. Regional all-retirement-benefit access ranged from 70% in the Mountain region to 77% in the Midwest.

States are trying to close part of that gap with auto-IRA programs for workers without employer plans. Pew reported that nearly half of private-sector workers, about 56 million people, lacked retirement benefits through their jobs. It also reported that 17 states had created automated retirement savings programs, and that programs with available data had helped 1 million workers accrue roughly $1.9 billion since 2017. These are not 401(k) plans, but they are a direct policy response to the same access problem.

International comparison: why 401(k) is a U.S. category

A 401(k) is a U.S. tax-qualified workplace plan. Other countries have occupational pensions, defined contribution plans, personal retirement accounts, or mandatory pension systems, but they do not have literal 401(k)s.

That makes international comparison tricky. The right comparison is usually not "401(k) assets by country." It is asset-backed pension savings by country, or defined contribution retirement assets by country. OECD's 2025 Pension Markets in Focus report estimated $69.8 trillion in OECD retirement assets at the end of 2024, including $63.1 trillion managed by pension providers and $6.7 trillion in public pension reserve funds.

The U.S. 401(k) figure is narrower. ICI's $9.9 trillion Q1 2026 401(k) estimate is only one U.S. plan category. It excludes IRAs, defined benefit pensions, 403(b) plans, 457 plans, TSP assets, annuities outside retirement accounts, and taxable brokerage accounts.

What to watch next

The next 401(k) data cycle will be shaped by three things.

First, market returns will move balances. Fidelity's Q1 2026 data already shows how this works: the average 401(k) balance fell 4% from Q4 2025, even though it was still 11% above Q1 2025. A balance trend is always part saving behavior and part market performance.

Second, contribution limits and catch-up rules changed. The 2026 limit rose to $24,500, and the higher age 60 to 63 catch-up remains $11,250. Starting in 2027, Pew notes that the federal Saver's Match is expected to provide up to $1,000 for eligible retirement savers.

Third, automatic features should keep expanding. If more small employers adopt plans and more states add auto-IRA programs, access can improve even when individual balances remain unequal. That is the real forecast to watch: not just whether the average balance rises, but whether more workers get a realistic path to start.

Methodology and source notes

This page prioritizes primary and near-primary sources: ICI for market assets, Fidelity and Vanguard for recordkeeper participant data, BLS for worker access, IRS for limits, and Pew for access-gap policy context.

The page intentionally separates market-wide assets from participant balances. Averages and medians from a recordkeeper are useful, but they reflect that recordkeeper's plans and participant mix. Worker access data from BLS is broader, but it usually refers to defined contribution plans, not only 401(k)s.

For annual updates, refresh this page after the latest ICI quarterly retirement market release, the annual Vanguard How America Saves report, Fidelity's newest quarterly retirement analysis, BLS employee-benefits tables, and IRS limit announcements.