401(k) Plan

A 401(k) plan is an employer-sponsored retirement savings account named after the section of the U.S. tax code that created it. Employees direct a portion of each paycheck into the plan, and the money grows tax-advantaged until withdrawal in retirement.

Most plans are offered as part of a broader employee benefits package, alongside health insurance and paid time off, and are administered through payroll.

How Does a 401(k) Plan Work?

Employees elect a contribution percentage or dollar amount, and that portion is deducted from each paycheck before it reaches their bank account. Contributions are invested in a menu of mutual funds, target-date funds, or other options the plan sponsor selects.

Traditional 401(k) contributions are pre-tax, lowering taxable gross pay in the year they're made. Roth 401(k) contributions are after-tax instead, so qualified withdrawals in retirement are tax-free.

What Are the 2026 401(k) Contribution Limits?

The IRS sets annual limits on how much employees and employers can contribute. For 2026, employees can defer up to $24,500 of their own pay, with an additional $8,000 catch-up contribution allowed for those 50 and older.

Employees aged 60 to 63 get a higher catch-up limit of $11,250 instead. Combined employee and employer contributions — including any match — are capped at $72,000, or 100% of an employee's compensation, whichever is lower.

What Is an Employer Match, and Why Does It Matter?

An employer match is money the company contributes to an employee's account based on what that employee defers, typically expressed as a formula like 50% of the first 6% of pay. Roughly one in four workers don't contribute enough to capture their full available match, leaving compensation on the table.

A well-designed match improves participation, supports nondiscrimination testing, and is one of the most visible levers HR has for making a compensation package competitive without raising base pay.

What Are an Employer's Fiduciary Responsibilities?

Sponsoring a 401(k) makes the employer, and often specific individuals inside it, a plan fiduciary under the Employee Retirement Income Security Act (ERISA). The Department of Labor requires fiduciaries to act solely in participants' interest, choose investment options prudently, and keep plan fees reasonable.

Many mid-market employers outsource day-to-day administration to a third-party recordkeeper or an ASO arrangement, but ultimate fiduciary accountability generally stays with the employer.

How Is a 401(k) Different From a Pension or IRA?

A pension guarantees a fixed retirement benefit funded and managed entirely by the employer, while a 401(k) shifts both funding and investment decisions to the employee. An IRA is opened individually rather than through an employer and carries lower annual contribution limits than a 401(k).

Why Does Offering a 401(k) Matter for Mid-Market Employers?

For companies with frontline and multi-location workforces, a 401(k) is often the deciding factor between a candidate accepting an offer and choosing a competitor. Managing eligibility, enrollment, and payroll deductions manually across multiple sites strains HR teams already stretched thin by core people-management work.

Syncing benefits and payroll data in a single system reduces enrollment errors and gives HR a clear audit trail. See how HR Cloud supports benefits and payroll workflows.

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Frequently Asked Questions

Q: What is a good 401(k) employer match? A: Fifty cents on the dollar up to 6% of pay is a common benchmark, though the average match across plans runs closer to 4-4.5% of salary. What counts as competitive depends on your industry and what similar employers in your labor market offer.

Q: Is offering a 401(k) required by law? A: No federal law requires private employers to offer a 401(k), though a small number of states require some form of retirement savings option if the employer doesn't sponsor its own plan.

Q: What happens to my 401(k) if I leave my job? A: Employees can typically leave the funds in the former employer's plan if the balance is large enough, roll the balance into a new employer's plan or an IRA, or cash out, though cashing out before age 59½ usually triggers taxes and a penalty.

Q: What's the difference between a traditional and Roth 401(k)? A: Traditional contributions are pre-tax and reduce taxable income now, with withdrawals taxed in retirement. Roth contributions are after-tax, with qualified withdrawals tax-free later. Many plans let employees split contributions between both.

Q: How much can I contribute to my 401(k) in 2026? A: Employees can defer up to $24,500 in 2026, plus an $8,000 catch-up if age 50 or older ($11,250 for those 60-63). Combined employee and employer contributions are capped at $72,000.