What is a 401(k)?

401(k) is a section of the US tax code

How did 401(k) plans get their name? Check out the 401(k) section (and subsection) of the US tax code made famous by benefits consultant Ted Benna. Tap into your inner accountant and check out the now-famous portion of the dense, 10,000-section tome that is the Internal Revenue Code.

Technically speaking, a 401(k) is a type of pension

The Employee Retirement Income Security Act of 1974 lumped both defined-contribution plans like 401(k) plans, and defined benefit plans (like what is colloquially known as a pension) under the term “pension” in order to protect workers and make retirement plan enforcement simpler. Learn more about the ERISA here.

A 401(k) plan allows workers to save for retirement without paying taxes until later

With a 401(k) plans you can invest more money now and let it grow with compound interest. Americans have more than $7T invested in these types of accounts.

Roughly 70 million Americans have 401(k) plans

Ted Benna, a rural benefits consultant, proposed a reinterpretation of a small tweak to the Internal Revenue Code in 1980. This led to a fundamental transformation of how American workers plan for retirement.

Smart tips for making the most of your 401(k)

There’s a lot of advice about handling a 401(k), but it can be mired in disclaimers and legalese. Come prepared to your financial advisor or accountant by watching this informative take on how to properly use a 401(k), from consolidating plans to some of the most common errors.

A basic guide to retirement savings account options, the IRA and the 401(k)

The two main types of accounts are 401(k) plans and individual retirement accounts (IRAs)—but what do those mean, exactly? There are differences between the two types, as well as the subtypes beneath them.

Roth 401(k) plans vs regular 401(k) plans

A normal 401(k) defers tax payments to later, while a Roth requires no tax payments at withdrawal time. Financial experts often recommend investing in a Roth 401(k) plan or Roth IRA when someone first starts their career to lock in a relatively low tax rate.

About 98% of companies offering employees a 401(k) plan match employee contributions

Broadly speaking, an employer 401(k) match means that if you invest money into your 401(k), your employer will put cash in, too. But these programs are often fairly nuanced.

The 401(k) is limited in its ability to provide guaranteed retirement income

Part of the problem is the high, often hidden fees associated with the accounts and a lack of access. Plus, analysts say the annual cost in tax revenue to the government is more than $100B.

Explore the key differences between 401(k) plans and IRAs

A 401(k) is employer-sponsored, may include matching contributions, and allows higher annual contributions (up to $23,000). An IRA is self-managed, offers greater control over investments, and has lower contribution limits ($7,000). Both plans come in traditional and Roth options, but income caps may limit IRA choices, while 401(k)s have no such restrictions.

401(k) plans had an average of $112K as of 2023

The median, however, is much lower at around $27K. The average balance of a 401(k) in the US differs across different age groups and income levels.

Fees can eat away at your 401(k)

Every investment plan has an expense ratio—a percentage of the total assets that goes to the investment manager in the form of fees. Because 401(k) plans are so common, and many of their participants are not savvy investors, the relative expense ratio for them has often excessively increased.

Some people roll their 401(k) into an IRA to have more control over their account

However, some argue that you could end up paying less money to invest in a 401(k) plan than you would to invest in an IRA. This article offers a list of pros and cons regarding rolling a 401(k) into an IRA.

A 401(k) 'super catch-up' lets people between 60 and 63 add money to their 401(k)

Through a "super catch-up," they can boost their retirement contributions as they prepare to stop working. But super catch-ups aren't always right for everyone.

If your job doesn’t offer a 401(k), you still have retirement savings options

Do you know more than a third of working adults aren't offered a 401(k) through their jobs? If you're part of that group, you still have options for retirement savings, including IRAs, taxable investment accounts, and more.

What 401(k) savers near retirement can do amid market volatility

If you're close to retirement, volatility in the stock market can feel scary. This guide for 401(k) savers has suggestions on what to do with your retirement accounts during uncertain times, based on how close you are to the age you'd like to retire.

Although anyone can contribute to a traditional IRA, not everyone can access its tax deductions

If you or your spouse contributes to a 401(k), you likely won’t be able to deduct your traditional IRA contributions from your taxes. On the flip side, if you don’t contribute to an employer-sponsored retirement account, you’re probably eligible for that tax deduction.

Researchers, experts, and retirees are finding that the 401(k) has left much to be desired

Baby Boomers, once the biggest generation, are now creating the largest wave of retirees in US history. Much of this generation is also the first to retire predominantly on the expectation that their 401(k) plans or similar tax-advantaged accounts performed well in the markets—which isn’t always the case.

In 2019, Congress passed the Secure Act to reform key aspects of the US tax code

Key Secure Act provisions included raising the age at which mandatory distributions take effect (to increase saving), allowing larger catch-up contributions for older individuals, and allowing employers to directly match contributions in a Roth 401(k).

A parent explains 529 plans and why they decided to start one

The parent explains the basics of what a 529 is, its advantages, and how it works, breaking down portfolio options for investing in 529 plans using Vanguard as a provider.

Learn how to invest in index funds with this step-by-step guide

There are a few questions experts suggest answering before investing in an index fund, such as your goals for your investment and the index you want to track. This article walks you through those questions to help you get started.

Call options 101

A call option is a contract that gives the option buyer the right to buy an underlying asset at a specified price within a specific time period. A call buyer profits when the underlying asset increases in price. Learn more about the financial contract and how you can use it in this article.

Learn how tax brackets actually work

The US has a series of tax brackets which grow progressively larger based on the amount of income a taxpayer makes. Contrary to common belief, most people don't pay just one tax bracket, but all of them progressively until they reach their income.

Making sense of the parts of a check

Though individuals use checks sparingly if at all, half of businesses rely heavily on check-writing to pay suppliers and contractors. Get to know the parts of a check with this visual guide.

Learn how to read a prospectus, the juicy document that any company must file with the SEC before going public.

While the first exchange-traded fund (a 'basket' of different assets that can be bought and sold on a stock exchange) in the US only launched in 1993, the global ETF market has grown to more than $10T in the short time since.

Fort Knox was built to be a secure facility for the US Treasury's gold reserves

The gold reserves were previously used to back the US dollar under the gold standard. Although the US went off the gold standard in 1971, Fort Knox continues to store a large portion of the nation's gold reserves.

Hedge funds, the private investment firms that trade a wide swath of financial assets, make money by imposing steep fees on investors and from the fund's investment performance.

The first steps to rebuilding your credit score include getting to know exactly what's on your credit report and figuring out how far you are from the '700 club,' or 'good score' range.

Calculate how much of your tax dollars go to each federal program based on your income, filing status, and number of children

The idea for the Federal Reserve was conceived in secret in 1910—with bankers donning duck hunt gear for disguise while traveling to a remote country club on Georgia's Jekyll Island

Children are now three times more likely to say they want to be a YouTuber when they grow up than an astronaut, with some even attending 'YouTube camps' that teach kids how to create content for the platform.

Sears sold DIY house kits starting at $600 in its famous catalog from 1908 through the 1940s, resulting in roughly 10,000 'Sears and Roebuck houses' being built.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

US housing costs have risen by roughly 175% between 1991 and 2026—but a growing number of Gen Zers are becoming homeowners anyway. In 2025, 4% of homebuyers were Gen Z, up from 3% the year before.

Play the role of a student in a game where you try to navigate college and remain debt-free, selecting different income levels, high school experience, race, ethnicity, and more.

When you complete a CAPTCHA on a website to prove you are human, you may be unknowingly training algorithms for self-driving cars, whose systems require training data to help identify crosswalks, bicycles, and other outdoor objects.

According to the physics of black holes, our 4D reality may be a hologram—a projection of information coded on a 2D surface on the edge of the universe.

Visualize how CRISPR-Cas9—a type of immune system used by single-celled organisms to attack invasive viruses—targets and makes precise changes to a gene's DNA.

In 2025, four executives from large tech companies were given positions in the US Army Reserves—including Palantir Chief Technology Officer Shyam Sankar, which reinforced Palantir's ties with the US military and its role as a leading defense partner.

About 2,000 US babies are born annually without some portion of their limbs, potentially leading to a lifetime of pricey prosthetics.

20,000 letters to the advice columnist 'Dear Abby' provide insight into prevailing sex, religion, and LGBTQ fears, anxieties, and concerns from the 1950s onward.

See this overview of the firework rules across all 50 states, ranging from a complete ban on non-professional fireworks in Massachusetts to states with more lax rules like Indiana.

Hear 50 years of iconic hip-hop samples, the genre's foundational looped tracks

Memecoins are a type of cryptocurrency—a form of digital currency with a wide variety of uses—created around popular 'memes,' or viral internet jokes.

Brandi Chastain, the star of the 1999 US victory over China in the 1999 Women's World Cup, was a last-second choice to take the penalty kick that sealed the victory.

The American cockroach is actually from Africa, an apparent hitchhiker aboard ships carrying enslaved people, with evidence suggesting the bug may have arrived in the New World as early as the 1600s.

Studies suggest when you sleep is as important as how much you get, and syncing with your circadian rhythms may lead to less fatigue and improved long-term health outcomes

Doctors differentiate between a phobia and fear by asking patients whether their fear interferes with their day-to-day activities.

Art theft is the third-largest source of criminal revenues worldwide, thanks in part to the subjective nature of valuing a work of art.