Employer-Sponsored Plan: Contributions, Vesting, and Withdrawals

Employer-sponsored retirement plans let you set aside part of your paycheck into a tax-advantaged account, usually with additional money from your employer on top. For 2026, you can defer up to $24,500 of your salary into most workplace plans, with higher limits if you’re 50 or older.¹ The specifics of eligibility, matching, vesting, and withdrawals depend on the type of plan your employer offers and the rules written into that plan’s documents.

What Kind of Plan Do You Have

Most workplace plans fall into one of four buckets, sorted by employer type:

401(k) plans are the standard at for-profit companies. You contribute a portion of your wages to an individual account, and your employer may add matching contributions.²
403(b) plans are offered by public schools, charities, and certain tax-exempt organizations. They work much like 401(k)s, with salary deferrals excluded from income tax until distribution.³
457(b) plans are for state and local government employees and some tax-exempt organizations. Some distribution rules differ from 401(k) and 403(b) plans.⁴
Defined benefit (pension) plans commit the employer to paying a specific monthly benefit at retirement based on your salary history and years of service. You don’t manage investments or choose a contribution amount. Pensions are now uncommon in the private sector but still widespread in government work.

Everything except the pension is a “defined contribution” plan, where your retirement balance depends on how much goes in and how the investments perform. Most of the rules below apply to those defined contribution plans, since those are what most workers deal with today. The Employee Retirement Income Security Act of 1974 (ERISA) sets the federal floor on participation, vesting, and administrator responsibilities for most private-sector plans.⁵

When You Can Join and How You Get Enrolled

Federal law sets a maximum waiting period. A company can require you to be at least 21 and to have completed one year of service, meaning a 12-month period in which you work at least 1,000 hours.⁶ Many employers do better than the minimum and let you enroll on your first day or after 30 to 90 days.

Part-time workers have gained ground under SECURE 2.0. Long-term part-time employees who work at least 500 hours in each of two consecutive 12-month periods and are at least 21 must be allowed to participate in 401(k) and ERISA-covered 403(b) plans. That’s lower than the standard 1,000-hour rule and brings in millions of workers who were previously shut out.

If your employer set up its 401(k) or 403(b) after December 29, 2022, SECURE 2.0 requires the plan to enroll you automatically. The default contribution rate must be between 3% and 10% of salary and climbs by 1% each year until it reaches at least 10%, capped at 15%. You can opt out or pick a different rate, but the default is participation. Plans in place before that date aren’t required to auto-enroll, though many do anyway.

Your plan’s Summary Plan Description (SPD) is the document that spells out the specific eligibility rules, entry dates, and enrollment steps at your employer. ERISA requires the employer to provide it.⁷

Getting the Employer Match

An employer match means your employer puts money into your account based on how much you put in yourself. No law requires a match, but most employers offer one. Failing to capture it is the most common retirement savings mistake.

Match formulas vary. A common structure is a dollar-for-dollar match on the first 3% of salary you contribute, then 50 cents on the dollar for the next 2%. Under that formula, contributing 5% of your pay earns you an employer contribution equal to 4% of salary. Other employers simply match dollar-for-dollar up to a flat percentage. The number to know is your plan’s full match threshold: the minimum contribution percentage that captures every matching dollar available to you. Contributing less than that leaves money on the table each pay period.

SECURE 2.0 also lets employers treat your qualified student loan payments as if they were retirement contributions for match purposes. If your employer has adopted this feature and you’re paying down student loans instead of contributing to the plan, you can still receive the match in your retirement account. Not every plan offers it, so ask your benefits administrator.

How Much You Can Contribute

For 2026, the IRS caps employee salary deferrals into a 401(k), 403(b), or governmental 457(b) at $24,500.¹ The limit applies across all plans of the same type. If you have two jobs each offering a 401(k), your combined employee deferrals still can’t exceed $24,500.

Workers 50 and older can add a catch-up contribution of up to $8,000 for 2026, for a total employee deferral of $32,500. SECURE 2.0 created a higher “super catch-up” for people aged 60 through 63: an extra $11,250 instead of the standard $8,000, bringing that group’s employee deferral cap to $35,750.¹

Once you add employer contributions and any after-tax employee contributions, the total that can go into your account for 2026 is $72,000, or $80,000 with the standard catch-up and $83,250 with the super catch-up.⁸

Traditional or Roth

Traditional (pre-tax) contributions reduce your taxable income now, and you pay income tax later when you withdraw the money in retirement. Roth contributions are made with after-tax dollars, so they don’t reduce your current tax bill, but qualified withdrawals in retirement (including all investment growth) come out tax-free. Many plans offer both and let you split your contributions, as long as the combined total stays within the annual limit.

Which one makes sense depends on whether you expect your tax bracket to be higher or lower in retirement. Early-career workers earning less now than they expect to later often favor Roth. Workers in peak earning years often favor the immediate deduction from traditional contributions.

If You Contribute Too Much

If your combined deferrals across plans exceed the annual limit, contact your plan administrator and request a return of the excess by April 15 of the following year.⁹ Miss that date and the excess is taxed in the year you contributed and again when you eventually withdraw it. Double taxation on a bookkeeping error is common when someone changes jobs mid-year and both plans hit their normal deferral rate.

When Employer Money Becomes Yours

Every dollar you contribute from your paycheck is immediately yours. Employer contributions work on a vesting schedule that determines when you actually own that money. Leave before you’re fully vested and you forfeit the unvested portion.

Federal law allows two main vesting structures for defined contribution plans:¹⁰

Three-year cliff vesting: 0% ownership of employer contributions until you complete three years of service, then 100% all at once.
Six-year graded vesting: ownership builds gradually, starting at 20% after two years and rising 20% each year until you reach 100% after six years.¹¹

These are the slowest schedules the law allows. An employer can vest you faster, and many do. Safe Harbor 401(k) plans, which are designed to pass certain IRS nondiscrimination tests automatically, must vest employer contributions 100% immediately. If your plan is Safe Harbor, you own that money the moment it hits your account.

Vesting matters most when you’re thinking about leaving. Check your vesting percentage before you resign. On a cliff schedule, the difference between two years and eleven months versus three years can be tens of thousands of dollars.

Taking Money Out Before Retirement

Many 401(k) and 403(b) plans let you borrow from your own account balance while you’re still employed. Federal law caps the loan at the lesser of $50,000 or half your vested balance. It has to be repaid within five years, with an exception for loans used to buy a primary residence.¹² You pay interest, but it goes back into your own account rather than to a bank.

The catch is what happens if you leave the job. Most plans require you to repay the outstanding balance shortly after separation. If you can’t, the remaining balance is treated as a taxable distribution, plus the 10% early withdrawal penalty if you’re under 59½.

A hardship withdrawal is different. You don’t pay it back. The IRS recognizes specific qualifying situations:¹³

Medical expenses for you, your spouse, or dependents
Costs of buying a primary home (mortgage payments don’t count)
College tuition and fees for the next 12 months for you or your family
Preventing eviction or foreclosure on your primary residence
Funeral expenses for family members
Repairs to your primary home after certain types of damage

Hardship withdrawals are subject to income tax, and the 10% early withdrawal penalty generally still applies under 59½. You can’t put the money back either. Plans aren’t required to offer hardship withdrawals, so check your SPD before you plan around one.

The Age 59½ Rule and Its Exceptions

You can start taking money out of a 401(k) or 403(b) without penalty once you reach age 59½. Withdrawals before that trigger a 10% additional tax on top of regular income tax.¹² On a $20,000 early withdrawal, that’s $2,000 in penalties before you even calculate income tax.

Congress has written a number of exceptions to the 10% penalty:¹²

Separation from service at age 55 or later, from that employer’s plan
Total and permanent disability
Substantially equal periodic payments calculated on your life expectancy
Qualified birth or adoption expenses, up to $5,000 per child
Federally declared disaster losses, up to $22,000
Domestic abuse victim withdrawals, up to $10,000 or 50% of your vested balance, whichever is less
Terminal illness
IRS levy on the account

Even when the penalty is waived, regular income tax still applies to traditional pre-tax withdrawals. Waiving the penalty doesn’t make the distribution tax-free.

What Happens When You Change Jobs

When you leave a job, you generally have four options for the money in your old employer’s plan: leave it where it is, roll it into your new employer’s plan, roll it into an IRA, or cash it out. The first three preserve the tax-deferred status. Cashing out is almost always the worst choice because you owe income tax on the full amount plus the 10% penalty if you’re under 59½.

A direct rollover is the cleanest option. The money transfers straight from your old plan to the new one or to an IRA. Nothing is withheld and nothing is owed.¹⁴

An indirect rollover is messier. The plan sends you a check, and by law 20% is withheld for federal taxes. You then have 60 days to deposit the full original amount (making up the withheld 20% from other funds) into a new qualified account. Deposit only the 80% you received and the missing 20% becomes a taxable distribution. Miss the 60-day window entirely and the whole amount becomes taxable income with possible penalties on top.¹⁴ Ask your plan administrator for a trustee-to-trustee transfer whenever possible.

Rolling into an IRA gives you the widest range of investment options, since you’re no longer limited to your employer’s plan menu. Rolling into a new employer’s 401(k), if the plan accepts incoming rollovers, keeps the money in the employer-plan system, which preserves the age-55 separation exception and the still-working RMD delay. The right choice depends on your investment preferences and whether those plan-specific features matter to you.

Required Minimum Distributions

You can’t leave money in a tax-deferred account forever. Starting at age 73, you must begin taking required minimum distributions (RMDs) each year based on your account balance and life expectancy. The deadline for your first RMD is April 1 of the year after you turn 73.¹⁵ If you’re still working at 73 and don’t own 5% or more of the company, most 401(k) plans let you delay RMDs from that plan until you actually retire. The still-working exception doesn’t apply to IRAs or to plans from former employers.

1
Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026
2
Internal Revenue Service. 401(k) Plans
3
Internal Revenue Service. IRC 403(b) Tax-Sheltered Annuity Plans
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Internal Revenue Service. IRC 457(b) Deferred Compensation Plans
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U.S. Department of Labor. Employee Retirement Income Security Act
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Office of the Law Revision Counsel. 29 U.S. Code 1052 – Minimum Participation Standards
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Internal Revenue Service. 401(k) Resource Guide Plan Participants Summary Plan Description
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Internal Revenue Service. COLA Increases for Dollar Limitations on Benefits and Contributions
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Internal Revenue Service. Consequences to a Participant Who Makes Excess Annual Salary Deferrals
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Office of the Law Revision Counsel. 29 U.S. Code 1053 – Minimum Vesting Standards
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Internal Revenue Service. Retirement Topics – Vesting
12
Office of the Law Revision Counsel. 26 USC 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts
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Internal Revenue Service. Retirement Topics – Hardship Distributions
14
Internal Revenue Service. Topic No. 413, Rollovers From Retirement Plans
15
Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs