What Is a 401(a) Plan? Contribution Limits and Withdrawal Rules

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A 401(a) plan is an employer-sponsored retirement plan that qualifies for tax advantages under Section 401(a) of the Internal Revenue Code and whose contribution formula, eligibility rules, vesting schedule and investment menu are set by the employer in the plan document. In everyday use, “401(a)” means the money-purchase or defined-contribution plans run by state and local governments, public universities, school systems and some nonprofits. These plans are often funded by a fixed employer contribution, a mandatory employee contribution, or both, rather than by voluntary salary deferrals.

The main 401(a) benefits are tax-deferred growth, employer money that does not depend on how much you choose to save, and portability once you leave. The trade-off is less control. Your employer decides whether you must participate, how much goes in, and which investments you can pick.

What Is a 401(a) Plan?

Section 401(a) is the part of the tax code that lists the requirements a pension, profit-sharing or stock bonus plan must meet to be “qualified,” meaning contributions and earnings are not taxed until they are paid out. In that legal sense, a 401(k) is also a 401(a) plan: the 401(k) is a cash-or-deferred feature added to a qualified plan. Defined-benefit pensions are qualified under Section 401(a) as well.

When people talk about “a 401(a) plan” as its own account type, though, they usually mean a defined-contribution plan without a 401(k) salary-deferral feature. The account balance belongs to the individual employee and grows or shrinks with the investments. The employer writes a formula into the plan, for example “the employer contributes 7% of pay and the employee contributes 3% of pay,” and that formula drives the money in, rather than an election the employee makes each year.

These plans are common among government agencies, public school districts, community colleges, state universities and some nonprofit organizations. One reason is historical. Since 1986, state and local governments generally cannot set up new 401(k) plans (plans established before that cutoff were grandfathered), so a 401(a) plan, often paired with a 457(b) plan, became a standard public-sector structure. Private employers can also sponsor 401(a) plans, and some use them for specific groups such as executives.

How a 401(a) Plan Works

The employer is the plan sponsor. It writes the plan document, picks a plan administrator or recordkeeper, chooses the investment menu, and decides:

• Who is eligible. A plan can cover all employees or only certain job classes, such as full-time faculty, administrators or public safety staff. An employer can run more than one 401(a) plan, each with different eligibility, contribution rates and vesting schedules.
• Whether participation is mandatory. Many public-sector plans require eligible employees to participate, so a set percentage of pay goes into the plan every pay period.
• The contribution formula. A flat percentage of salary, a fixed dollar amount, a match on voluntary employee contributions, or a combination.
• The vesting schedule for employer contributions.
• How and when money can come out, including whether loans or in-service withdrawals are allowed.

The employer’s control has limits. The plan must stay within federal limits on contributions and compensation, follow the plan document consistently, and meet the qualification rules that keep its tax status. Private-sector 401(a) plans are also covered by ERISA, the federal law that sets fiduciary, reporting and minimum vesting standards. Governmental plans are exempt from ERISA, so for a public employee, state law and the plan document carry more of the weight.

Employers use 401(a) plans partly as a retention tool. A generous employer contribution combined with a multi-year vesting schedule gives employees a financial reason to stay.

Contributions and Contribution Limits

Who contributes

A 401(a) plan can be funded three ways:

1. Employer contributions. A fixed percentage of pay, a fixed dollar amount, or a match on employee contributions. Most 401(a) plans include them, but the law does not require them in every plan.
2. Mandatory employee contributions. A required percentage of salary withheld from each paycheck.
3. Voluntary employee contributions. Extra after-tax contributions, if the plan allows them. Plans commonly cap these as a percentage of compensation; for example, a plan might limit them to 25% of pay. That cap comes from the plan, not from a universal rule.

Federal limits

Two federal limits shape every 401(a) plan:

• The annual additions limit (Section 415(c)). The total going into your account in a year (employer contributions, mandatory and voluntary employee contributions, and forfeitures reallocated to you) cannot exceed the lesser of 100% of your compensation or a dollar amount the IRS adjusts annually for inflation.
• The compensation limit (Section 401(a)(17)). Only pay up to an annually indexed ceiling can be counted when a plan calculates contributions. A plan that contributes 10% of pay applies that 10% only to compensation up to the limit.

A 401(a) plan without a salary-deferral feature does not use the separate elective deferral limit that applies to 401(k), 403(b) and 457(b) contributions. A public employee can therefore have mandatory contributions going into a 401(a) and still defer the full allowed amount into a 403(b) or 457(b) at the same employer. Catch-up contributions for workers age 50 and older are tied to elective deferrals, so they belong to those plans, not to a pure 401(a) plan.

Is a 401(a) pre-tax or post-tax?

It depends on the type of contribution:

• Employer contributions go in pre-tax. You pay income tax on them, and on their earnings, when you withdraw.
• Mandatory employee contributions in governmental plans are often “picked up” by the employer under Section 414(h). A picked-up contribution is treated as an employer contribution for tax purposes, so it is excluded from your taxable wages even though it comes out of your paycheck.
• Voluntary employee contributions are usually made with after-tax dollars. You will not be taxed again on the contributed amount, but earnings on it are taxable when distributed.

In all three cases, investment growth is tax-deferred while it stays in the plan. Whether your plan offers Roth treatment for any contributions is a plan-specific question.

Investment Options

The employer selects the menu. That might be a short list of mutual funds, a set of target-date funds, a stable value or fixed-interest option, or an annuity contract, often with a default investment for anyone who does not choose. Being required to participate does not mean you have no say in how the money is invested, but you cannot buy individual stocks or outside funds the plan does not offer.

Because a 401(a) defined-contribution account has no guaranteed benefit, its value moves with the investments. A loss stays in the account until markets recover, you change investments, or you withdraw. Unlike a defined-benefit pension, no employer makes up the difference.

Plan menus differ in risk and cost. Conservative lineups reduce exposure to market drops but limit growth potential. Others look much like a typical 401(k) lineup. Fees come out of your returns, so read the plan’s fee disclosure alongside the fund list.

Vesting Rules

Vesting determines how much of your account you keep if you leave.

• Your own contributions, mandatory or voluntary, plus their earnings, are always 100% vested.
• Employer contributions vest according to the plan’s schedule. A plan might vest them immediately, all at once after a set number of years (cliff vesting), or in steps each year (graded vesting).

For private-sector defined-contribution plans, ERISA sets the slowest schedules allowed: full vesting after three years of service under a cliff schedule, or a graded schedule reaching 100% after six years. Governmental plans are not bound by those ERISA minimums, so schedules in public plans follow the plan document. In any qualified plan, employer contributions become fully vested at the plan’s normal retirement age and if the plan terminates.

Vesting also interacts with eligibility. A qualified private-sector plan can generally require up to one year of service before you join, or up to two years if employer contributions are then 100% vested immediately. Governmental plans are not subject to these minimum participation rules.

If your employer contributions are not vested, you cannot withdraw them. When you leave, the unvested portion is forfeited back to the plan, where it may be used to pay plan expenses or reduce future employer contributions.

401(a) Withdrawal Rules

Before age 59½

Distributions from a 401(a) are taxed as ordinary income, except for any after-tax contributions you made. If you take money out before age 59½, the IRS generally adds a 10% additional tax unless an exception applies. Common exceptions include:

• Death (payments to beneficiaries) or total and permanent disability
• Separation from service in or after the year you turn 55, or age 50 for qualified public safety employees in a governmental plan
• A series of substantially equal periodic payments
• Payments to an alternate payee under a qualified domestic relations order (QDRO)
• Unreimbursed medical expenses above the deductible threshold
• An IRS levy on the plan
• A direct rollover to an IRA or another eligible retirement plan

Federal tax law permits these exceptions, but your plan decides when you can take money out at all. Many 401(a) plans allow distributions only after you separate from service, retire, become disabled or die, and do not permit hardship or in-service withdrawals while you are still working.

How the money can be paid

Depending on the plan, you may be able to take a lump sum, periodic installments, or an annuity, or roll the balance into an IRA or a new employer’s plan. A direct trustee-to-trustee rollover avoids withholding and keeps the money tax-deferred. If an eligible rollover distribution is paid to you instead, the plan must withhold 20% for federal income tax.

Loans

A 401(a) plan may offer loans, but it does not have to. Where loans are allowed, federal law caps a loan at the lesser of $50,000 or 50% of your vested balance, with a few exceptions for small balances. The plan document decides how many loans you can have outstanding at once and the repayment terms. A loan that is not repaid on schedule is treated as a taxable distribution and can trigger the 10% additional tax.

Required minimum distributions

You cannot leave money in the plan forever. Under current law, required minimum distributions generally start at age 73, rising to 75 for people born in 1960 or later. If you are still working for the employer that sponsors the plan, you can typically delay RMDs from that plan until you retire.

Example of a 401(a) Plan

Hypothetical example for illustration only; not any employer’s actual terms.

Maria works for a county government and earns $60,000 a year. Her employer’s 401(a) plan requires:

• A mandatory employee contribution of 5% of pay, picked up by the employer under Section 414(h): $3,000 a year, excluded from her taxable wages
• An employer contribution of 8% of pay: $4,800 a year
• A five-year cliff vesting schedule for employer contributions

Each year, $7,800 goes into her account. Assume, for simplicity, no investment gains or losses and no raises.

She leaves after three years. Her account shows $23,400. Her own contributions, $9,000, are fully vested. The employer contributions, $14,400, are not, because she left before the five-year cliff. She keeps $9,000 and forfeits $14,400.

She leaves after five years. All $39,000 is vested: $15,000 from her and $24,000 from the employer.

She cashes out $20,000 at age 45 instead of rolling it over. The plan withholds 20%, or $4,000. The full $20,000 counts as ordinary income on her tax return, and because she is under 59½ and no exception applies, she also owes a $2,000 additional tax. If she had requested a direct rollover to an IRA, she would owe nothing for that year and the full $20,000 would stay invested.

401(a) vs. 401(k)

401(a) vs. 403(b) and 457(b)

Public employees often see a 401(a) offered next to a 403(b), a 457(b), or both.

403(b) plans are for employees of public schools, certain tax-exempt organizations (Section 501(c)(3) organizations) and ministers. Like a 401(k), they are built around voluntary salary deferrals, with the elective deferral limit and age-50 catch-up. Some also allow an additional catch-up for employees with at least 15 years of service with a qualifying employer, subject to plan terms. A 403(b) can also include employee contributions required as a condition of employment.

Governmental 457(b) plans are deferred compensation plans for state and local government workers. They also run on voluntary deferrals, but distributions from a governmental 457(b) after you leave your job are generally not subject to the 10% early distribution tax, except for amounts rolled in from other plan types.

Federal government employees are a separate case: their defined-contribution plan is the Thrift Savings Plan, which has its own rules.

Limitations of a 401(a) Plan

• Limited employee control. The employer sets eligibility, the investment menu and the contribution rate, and you cannot raise or lower a mandatory contribution.
• Mandatory participation. If the plan requires it, part of every paycheck goes in whether or not you would choose to save that much.
• Restricted access. Plan rules can block withdrawals while you are still employed, and early withdrawals usually carry tax and possibly the 10% additional tax.
• Vesting risk. Leaving before you are vested means forfeiting employer contributions.
• Investment menu and fees. You are limited to the options the employer picked, at whatever cost they carry.
• Availability. You can only join a 401(a) through an employer that offers one.

What Happens to Your 401(a) When You Leave a Job

Your vested balance stays yours after you separate from the employer. Unvested employer contributions are forfeited. With the vested amount, your options typically include:

• Leaving it in the plan, if the plan allows former employees to keep accounts
• Rolling it over to an IRA or to a new employer’s 401(k), 403(b) or governmental 457(b), as long as the receiving plan accepts rollovers (plans are not required to)
• Taking a distribution as a lump sum or, where offered, installments or an annuity, with income tax and possibly the 10% additional tax

Some payments are not eligible for rollover, such as required minimum distributions and substantially equal periodic payments.

FAQs

The Bottom Line

Public employees, university staff and some nonprofit workers are the people most likely to have a 401(a), often with mandatory contributions they cannot change. Before changing jobs, check the vesting schedule so you do not forfeit employer money by leaving early. When you do leave, a direct rollover to an IRA or another eligible plan avoids withholding and keeps the vested balance tax-deferred.